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Du T, Qu X, Wang Y, Li M, Qie X, Jin J, Gao Y, Wang Z, Lin K, Yang C, Sun J. Rhizosphere Mortierella strain of alfalfa exerted weed growth inhibition by inducing expression of plant hormone-related genes. Front Microbiol 2024; 15:1385992. [PMID: 38952443 PMCID: PMC11215053 DOI: 10.3389/fmicb.2024.1385992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 05/31/2024] [Indexed: 07/03/2024] Open
Abstract
Introduction Weeds are significant factors that detrimentally affect crop health and hinder optimal herbage yield. Rhizosphere microorganisms play crucial roles in plant growth, development, and nutrient uptake. Therefore, research focusing on weed control through the lens of microorganisms has emerged as a prominent area of study. The oil-producing fungus Mortierella, which is known for its numerous agricultural benefits, has garnered significant attention in recent years. Methods In this study, we conducted inoculation experiments in a controlled artificial culture climate chamber to investigate the effects of differential hormones and differentially expressed genes in the stems and leaves of Digitaria sanguinalis using Liquid Chromatography Tandem Mass Spectrometry and RNA-seq techniques, respectively. Additionally, Pearson's correlation analysis was used to establish correlations between differential hormones and growth indicators of Digitaria sanguinalis. Results and discussion The results demonstrated that inoculation with Mortierella sp. MXBP304 effectively suppressed aboveground biomass and plant height in Digitaria sanguinalis. Furthermore, there was significant upregulation and downregulation in the expression of genes involved in the synthesis and metabolism of phenylalanine and L-phenylalanine. Conversely, the expression of genes related to tryptophan, L-tryptophan, and indole was significantly downregulated. The addition of Mortierella sp. MXBP304 can influence the gene expression associated with phenylalanine and tryptophan synthesis and metabolism during Digitaria sanguinalis growth, subsequently reducing the relative contents of phenylalanine and tryptophan, thereby directly inhibiting Digitaria sanguinalis growth.
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Affiliation(s)
- Taotao Du
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Xudong Qu
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Yibo Wang
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Meixuan Li
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Xihu Qie
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Jing Jin
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Yuxuan Gao
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Zengyu Wang
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Kejian Lin
- Institute of Grassland Research of CAAS, Hohhot, Inner Mongolia, China
| | - Chao Yang
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
| | - Juan Sun
- Key Laboratory of National Forestry and Grassland Administration on Grassland Resources and Ecology in the Yellow River Delta, College of Grassland Science, Qingdao Agricultural University, Qingdao, Shandong, China
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Cao P, Yang J, Xia L, Zhang Z, Wu Z, Hao Y, Liu P, Wang C, Li C, Yang J, Lai J, Li X, Deng M, Wang S. Two gene clusters and their positive regulator SlMYB13 that have undergone domestication-associated negative selection control phenolamide accumulation and drought tolerance in tomato. MOLECULAR PLANT 2024; 17:579-597. [PMID: 38327054 DOI: 10.1016/j.molp.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 01/01/2024] [Accepted: 02/02/2024] [Indexed: 02/09/2024]
Abstract
Among plant metabolites, phenolamides, which are conjugates of hydroxycinnamic acid derivatives and polyamines, play important roles in plant adaptation to abiotic and biotic stresses. However, the molecular mechanisms underlying phenolamide metabolism and regulation as well as the effects of domestication and breeding on phenolamide diversity in tomato remain largely unclear. In this study, we performed a metabolite-based genome-wide association study and identified two biosynthetic gene clusters (BGC7 and BGC11) containing 12 genes involved in phenolamide metabolism, including four biosynthesis genes (two 4CL genes, one C3H gene, and one CPA gene), seven decoration genes (five AT genes and two UGT genes), and one transport protein gene (DTX29). Using gene co-expression network analysis we further discovered that SlMYB13 positively regulates the expression of two gene clusters, thereby promoting phenolamide accumulation. Genetic and physiological analyses showed that BGC7, BGC11 and SlMYB13 enhance drought tolerance by enhancing scavenging of reactive oxygen species and increasing abscisic acid content in tomato. Natural variation analysis suggested that BGC7, BGC11 and SlMYB13 were negatively selected during tomato domestication and improvement, leading to reduced phenolamide content and drought tolerance of cultivated tomato. Collectively, our study discovers a key mechanism of phenolamide biosynthesis and regulation in tomato and reveals that crop domestication and improvement shapes metabolic diversity to affect plant environmental adaptation.
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Affiliation(s)
- Peng Cao
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China; Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Haikou 572208, China
| | - Jun Yang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China; Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Haikou 572208, China.
| | - Linghao Xia
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Zhonghui Zhang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Zeyong Wu
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Yingchen Hao
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Penghui Liu
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Chao Wang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Chun Li
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Jie Yang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Jun Lai
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Xianggui Li
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Meng Deng
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China
| | - Shouchuang Wang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Agriculture and Forestry, Hainan University, Haikou 572208, China; Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture, Hainan University, Haikou 572208, China.
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Kalve S, House MA, Tar’an B. Freezing stress response of wild and cultivated chickpeas. FRONTIERS IN PLANT SCIENCE 2024; 14:1310459. [PMID: 38375446 PMCID: PMC10876003 DOI: 10.3389/fpls.2023.1310459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 12/21/2023] [Indexed: 02/21/2024]
Abstract
Chickpea is an economically and nutritionally important grain legume globally, however, cold stress has adverse effects on its growth. In cold countries, like Canada where the growing season is short, having cold stress-tolerant varieties is crucial. Crop wild relatives of chickpea, especially Cicer reticulatum, can survive in suboptimal environments and are an important resource for crop improvement. In this study, we explored the performance of eleven C. reticulatum wild accessions and two chickpea cultivars, CDC Leader and CDC Consul, together with a cold sensitive check ILC533 under freezing stress. Freezing tolerance was scored based on a 1-9 scale. The wild relatives, particularly Kesen_075 and CudiA_152, had higher frost tolerance compared to the cultivars, which all died after frost treatment. We completed transcriptome analysis via mRNA sequencing to assess changes in gene expression in response to freezing stress and identified 6,184 differentially expressed genes (DEGs) in CDC Consul, and 7,842 DEGs in Kesen_075. GO (gene ontology) analysis of the DEGs revealed that those related to stress responses, endogenous and external stimuli responses, secondary metabolite processes, and photosynthesis were significantly over-represented in CDC Consul, while genes related to endogenous stimulus responses and photosynthesis were significantly over-represented in Kesen_075. These results are consistent with Kesen_075 being more tolerant to freezing stress than CDC Consul. Moreover, our data revealed that the expression of CBF pathway-related genes was impacted during freezing conditions in Kesen_075, and expression of these genes is believed to alleviate the damage caused by freezing stress. We identified genomic regions associated with tolerance to freezing stress in an F2 population derived from a cross between CDC Consul and Kesen_075 using QTL-seq analysis. Eight QTLs (P<0.05) on chromosomes Ca3, Ca4, Ca6, Ca7, Ca8, and two QTLs (P<0.01) on chromosomes Ca4 and Ca8, were associated with tolerance to freezing stress. Interestingly, 58 DEGs co-located within these QTLs. To our knowledge, this is the first study to explore the transcriptome and QTLs associated with freezing tolerance in wild relatives of chickpea under controlled conditions. Altogether, these findings provide comprehensive information that aids in understanding the molecular mechanism of chickpea adaptation to freezing stress and further provides functional candidate genes that can assist in breeding of freezing-stress tolerant varieties.
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Affiliation(s)
| | | | - Bunyamin Tar’an
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada
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Li J, Yao S, Kim SC, Wang X. Lipid phosphorylation by a diacylglycerol kinase suppresses ABA biosynthesis to regulate plant stress responses. MOLECULAR PLANT 2024; 17:342-358. [PMID: 38243594 PMCID: PMC10869644 DOI: 10.1016/j.molp.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 12/08/2023] [Accepted: 01/05/2024] [Indexed: 01/21/2024]
Abstract
Lipid phosphorylation by diacylglycerol kinase (DGK) that produces phosphatidic acid (PA) plays important roles in various biological processes, including stress responses, but the underlying mechanisms remain elusive. Here, we show that DGK5 and its lipid product PA suppress ABA biosynthesis by interacting with ABA-DEFICIENT 2 (ABA2), a key ABA biosynthesis enzyme, to negatively modulate plant response to abiotic stress tested in Arabidopsis thaliana. Loss of DGK5 function rendered plants less damaged, whereas overexpression (OE) of DGK5 enhanced plant damage to water and salt stress. The dgk5 mutant plants exhibited decreased total cellular and nuclear levels of PA with increased levels of diacylglycerol, whereas DGK5-OE plants displayed the opposite effect. Interestingly, we found that both DGK5 and PA bind to the ABA-synthesizing enzyme ABA2 and suppress its enzymatic activity. Consistently, the dgk5 mutant plants exhibited increased levels of ABA, while DGK5-OE plants showed reduced ABA levels. In addition, we showed that both DGK5 and ABA2 are detected in and outside the nuclei, and loss of DGK5 function decreased the nuclear association of ABA2. We found that both DGK5 activity and PA promote nuclear association of ABA2. Taken together, these results indicate that both DGK5 and PA interact with ABA2 to inhibit its enzymatic activity and promote its nuclear sequestration, thereby suppressing ABA production in response to abiotic stress. Our study reveals a sophisticated mechanism by which DGK5 and PA regulate plant stress responses.
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Affiliation(s)
- Jianwu Li
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Shuaibing Yao
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Sang-Chul Kim
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Xuemin Wang
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA.
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Zhang F, Chen T, Liu N, Hou X, Wang L, Cai Q, Li R, Qian X, Xu H, Zhu Z, Zheng W, Yu Y, Zhou K. Genome-wide characterization of SDR gene family and its potential role in seed dormancy of Brassica napus L. BMC PLANT BIOLOGY 2024; 24:21. [PMID: 38166550 PMCID: PMC10759766 DOI: 10.1186/s12870-023-04700-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/19/2023] [Indexed: 01/04/2024]
Abstract
Rapeseed (Brassica napus L.) with short or no dormancy period are easy to germinate before harvest (pre-harvest sprouting, PHS). PHS has seriously decreased seed weight and oil content in B. napus. Short-chain dehydrogenase/ reductase (SDR) genes have been found to related to seed dormancy by promoting ABA biosynthesis in rice and Arabidopsis. In order to clarify whether SDR genes are the key factor of seed dormancy in B. napus, homology sequence blast, protein physicochemical properties, conserved motif, gene structure, cis-acting element, gene expression and variation analysis were conducted in present study. Results shown that 142 BnaSDR genes, unevenly distributed on 19 chromosomes, have been identified in B. napus genome. Among them, four BnaSDR gene clusters present in chromosome A04、A05、C03、C04 were also identified. These 142 BnaSDR genes were divided into four subfamilies on phylogenetic tree. Members of the same subgroup have similar protein characters, conserved motifs, gene structure, cis-acting elements and tissue expression profiles. Specially, the expression levels of genes in subgroup A, B and C were gradually decreased, but increased in subgroup D with the development of seeds. Among seven higher expressed genes in group D, six BnaSDR genes were significantly higher expressed in weak dormancy line than that in nondormancy line. And the significant effects of BnaC01T0313900ZS and BnaC03T0300500ZS variation on seed dormancy were also demonstrated in present study. These findings provide a key information for investigating the function of BnaSDRs on seed dormancy in B. napus.
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Affiliation(s)
- Fugui Zhang
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Tianhua Chen
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Nian Liu
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Xinzhe Hou
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Ling Wang
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Qingao Cai
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Rui Li
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Xingzhi Qian
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Hong Xu
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Zonghe Zhu
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Wenyin Zheng
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Yan Yu
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China
| | - Kejin Zhou
- College of Agronomy, Anhui Agricultural University, 130, Changjiang West Road, Hefei, Anhui, 230036, China.
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Sabir IA, Manzoor MA, Shah IH, Ahmad Z, Liu X, Alam P, Wang Y, Sun W, Wang J, Liu R, Jiu S, Zhang C. Unveiling the effect of gibberellin-induced iron oxide nanoparticles on bud dormancy release in sweet cherry (Prunus avium L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 206:108222. [PMID: 38016371 DOI: 10.1016/j.plaphy.2023.108222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/02/2023] [Accepted: 11/20/2023] [Indexed: 11/30/2023]
Abstract
Hydrogen cyanide has been extensively used worldwide for bud dormancy break in fruit trees, consequently enhancing fruit production via expedited cultivation, especially in areas with controlled environments or warmer regions. A novel and safety nanotechnology was developed since the hazard of hydrogen cyanide for the operators and environments, there is an urgent need for the development of novel and safety approaches to replace it to break bud dormancy for fruit trees. In current study, we have systematically explored the potential of iron oxide nanoparticles, specifically α-Fe2O3, to modulate bud dormancy in sweet cherry (Prunus avium). The synthesized iron oxide nanoparticles underwent meticulous characterization and assessment using various techniques, including Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and ultraviolet-visible infrared (UV-Vis) spectroscopy. Remarkably, when applied at a concentration of 10 mg L-1 alongside gibberellin (GA4+7), these iron oxide nanoparticles exhibited a substantial 57% enhancement in bud dormancy release compared to control groups, all achieved within a remarkably short time span of 4 days. Our RNA-seq analyses further unveiled that 2757 genes within the sweet cherry buds were significantly up-regulated when treated with 10 mg L-1 α-Fe2O3 nanoparticles in combination with GA, while 4748 genes related to dormancy regulation were downregulated in comparison to the control. Moreover, we discovered an array of 58 transcription factor families among the crucial differentially expressed genes (DEGs). Through hormonal quantification, we established that the increased bud burst was accompanied by a reduced concentration of abscisic acid (ABA) at 761.3 ng/g fresh weight in the iron oxide treatment group, coupled with higher levels of gibberellins (GAs) in comparison to the control. Comprehensive transcriptomic and metabolomic analyses unveiled significant alterations in hormone contents and gene expression during the bud dormancy-breaking process when α-Fe2O3 nanoparticles were combined with GA. In conclusion, our findings provide valuable insights into the intricate molecular mechanisms underlying the impact of iron oxide nanoparticles on achieving uniform bud dormancy break in sweet cherry trees.
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Affiliation(s)
- Irfan Ali Sabir
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Muhammad Aamir Manzoor
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Iftikhar Hussain Shah
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Zishan Ahmad
- Bambo Research Institute, Nanjing Forestry University, Nanjing, 210037, China
| | - Xunju Liu
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Pravej Alam
- Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, 11942, Saudi Arabia
| | - Yuxuan Wang
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Wanxia Sun
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Jiyuan Wang
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Ruie Liu
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Songtao Jiu
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Caixi Zhang
- Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.
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Liu Y, Cao Y. GmWRKY17-mediated transcriptional regulation of GmDREB1D and GmABA2 controls drought tolerance in soybean. PLANT MOLECULAR BIOLOGY 2023; 113:157-170. [PMID: 37973764 DOI: 10.1007/s11103-023-01380-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/24/2023] [Indexed: 11/19/2023]
Abstract
Drought affects soybean growth and ultimately led to yield reduction. WRKY transcription factors involve in the regulation of abiotic stress. Few functions of WRKY transcription factors underlying drought tolerance in soybean are clear. Here, we reported a WRKY transcription factor named GmWRKY17 that positively regulates soybean drought tolerance by regulating drought-induced genes and ABA-related genes. Transcriptome sequencing (RNA-Seq) and yeast one hybrid analysis identified downstream genes regulated by GmWRKY17. ChIP-qPCR, EMSA and dual-luciferase reporter assay showed that GmWRKY17 directly bound to the promoters of the GmDREB1D and GmABA2, and activated their expression under drought stress. Overexpression of GmDREB1D gene enhanced drought tolerance of soybean. Taken together, our study revealed a regulatory mechanism that GmWRKY17 transcription factor may improve soybean drought tolerance by mediating ABA synthesis and DREB signaling pathway.
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Affiliation(s)
- Yi Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yueping Cao
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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Laloum T, Carvalho SD, Martín G, Richardson DN, Cruz TMD, Carvalho RF, Stecca KL, Kinney AJ, Zeidler M, Barbosa ICR, Duque P. The SCL30a SR protein regulates ABA-dependent seed traits and germination under stress. PLANT, CELL & ENVIRONMENT 2023; 46:2112-2127. [PMID: 37098235 DOI: 10.1111/pce.14593] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/03/2023] [Accepted: 04/10/2023] [Indexed: 05/23/2023]
Abstract
SR proteins are conserved RNA-binding proteins best known as splicing regulators that have also been implicated in other steps of gene expression. Despite mounting evidence for a role in plant development and stress responses, the molecular pathways underlying SR protein regulation of these processes remain poorly understood. Here we show that the plant-specific SCL30a SR protein negatively regulates ABA signaling to control seed traits and stress responses during germination in Arabidopsis. Transcriptome-wide analyses revealed that loss of SCL30a function barely affects splicing, but largely induces ABA-responsive gene expression and genes repressed during germination. Accordingly, scl30a mutant seeds display delayed germination and hypersensitivity to ABA and high salinity, while transgenic plants overexpressing SCL30a exhibit reduced ABA and salt stress sensitivity. An ABA biosynthesis inhibitor rescues the enhanced mutant seed stress sensitivity, and epistatic analyses confirm that this hypersensitivity requires a functional ABA pathway. Finally, seed ABA levels are unchanged by altered SCL30a expression, indicating that the gene promotes seed germination under stress by reducing sensitivity to the phytohormone. Our results reveal a new player in ABA-mediated control of early development and stress response.
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Affiliation(s)
- Tom Laloum
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | | | | | | | | | | | - Kevin L Stecca
- Crop Genetics Research and Development, DuPont Experimental Station, Wilmington, Delaware, USA
| | - Anthony J Kinney
- Crop Genetics Research and Development, DuPont Experimental Station, Wilmington, Delaware, USA
| | - Mathias Zeidler
- Institute of Plant Physiology, Justus-Liebig-University Gießen, Gießen, Germany
| | | | - Paula Duque
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
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Koh SS, Dev K, Tan JJ, Teo VX, Zhang S, U.S. D, Olivo M, Urano D. Classification of Plant Endogenous States Using Machine Learning-Derived Agricultural Indices. PLANT PHENOMICS (WASHINGTON, D.C.) 2023; 5:0060. [PMID: 37383729 PMCID: PMC10298216 DOI: 10.34133/plantphenomics.0060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 06/02/2023] [Indexed: 06/30/2023]
Abstract
Leaf color patterns vary depending on leaf age, pathogen infection, and environmental and nutritional stresses; thus, they are widely used to diagnose plant health statuses in agricultural fields. The visible-near infrared-shortwave infrared (VIS-NIR-SWIR) sensor measures the leaf color pattern from a wide spectral range with high spectral resolution. However, spectral information has only been employed to understand general plant health statuses (e.g., vegetation index) or phytopigment contents, rather than pinpointing defects of specific metabolic or signaling pathways in plants. Here, we report feature engineering and machine learning methods that utilize VIS-NIR-SWIR leaf reflectance for robust plant health diagnostics, pinpointing physiological alterations associated with the stress hormone, abscisic acid (ABA). Leaf reflectance spectra of wild-type, ABA2-overexpression, and deficient plants were collected under watered and drought conditions. Drought- and ABA-associated normalized reflectance indices (NRIs) were screened from all possible pairs of wavelength bands. Drought associated NRIs showed only a partial overlap with those related to ABA deficiency, but more NRIs were associated with drought due to additional spectral changes within the NIR wavelength range. Interpretable support vector machine classifiers built with 20 NRIs predicted treatment or genotype groups with an accuracy greater than those with conventional vegetation indices. Major selected NRIs were independent from leaf water content and chlorophyll content, 2 well-characterized physiological changes under drought. The screening of NRIs, streamlined with the development of simple classifiers, serves as the most efficient means of detecting reflectance bands that are highly relevant to characteristics of interest.
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Affiliation(s)
- Sally Shuxian Koh
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Kapil Dev
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Javier Jingheng Tan
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Valerie Xinhui Teo
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Shuyan Zhang
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Dinish U.S.
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Malini Olivo
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Daisuke Urano
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
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10
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Wei J, Xu L, Shi Y, Cheng T, Tan W, Zhao Y, Li C, Yang X, Ouyang L, Wei M, Wang J, Lu G. Transcriptome profile analysis of Indian mustard (Brassica juncea L.) during seed germination reveals the drought stress-induced genes associated with energy, hormone, and phenylpropanoid pathways. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 200:107750. [PMID: 37210860 DOI: 10.1016/j.plaphy.2023.107750] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 04/14/2023] [Accepted: 05/08/2023] [Indexed: 05/23/2023]
Abstract
Indian mustard (Brassica juncea L. Czern and Coss) is an important oil and vegetable crop frequently affected by seasonal drought stress during seed germination, which retards plant growth and causes yield loss considerably. However, the gene networks regulating responses to drought stress in leafy Indian mustard remain elusive. Here, we elucidated the underlying gene networks and pathways of drought response in leafy Indian mustard using next-generation transcriptomic techniques. Phenotypic analysis showed that the drought-tolerant leafy Indian mustard cv. 'WeiLiang' (WL) had a higher germination rate, antioxidant capacity, and better growth performance than the drought-sensitive cv. 'ShuiDong' (SD). Transcriptome analysis identified differentially expressed genes (DEGs) in both cultivars under drought stress during four germination time points (i.e., 0, 12, 24, and 36 h); most of which were classified as drought-responsive, seed germination, and dormancy-related genes. In the Kyoto Encyclopedia of Genes and Genome (KEGG) analyses, three main pathways (i.e., starch and sucrose metabolism, phenylpropanoid biosynthesis, and plant hormone signal transduction) were unveiled involved in response to drought stress during seed germination. Furthermore, Weighted Gene Co-expression Network Analysis (WGCNA) identified several hub genes (novel.12726, novel.1856, BjuB027900, BjuA003402, BjuA021578, BjuA005565, BjuB006596, novel.12977, and BjuA033308) associated with seed germination and drought stress in leafy Indian mustard. Taken together, these findings deepen our understanding of the gene networks for drought responses during seed germination in leafy Indian mustard and provide potential target genes for the genetic improvement of drought tolerance in this crop.
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Affiliation(s)
- Jinxing Wei
- College of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China; Integrative Microbiology Research Centre, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Linghui Xu
- Integrative Microbiology Research Centre, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China; Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, 510642, China
| | - Yu Shi
- Integrative Microbiology Research Centre, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Tianfang Cheng
- Integrative Microbiology Research Centre, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Wenlan Tan
- Integrative Microbiology Research Centre, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China
| | - Yongguo Zhao
- College of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China
| | - Chunsheng Li
- Hubei Engineering University, Xiaogan, 432000, China
| | - Xinyu Yang
- College of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China
| | - Lejun Ouyang
- College of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China
| | - Mingken Wei
- College of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China
| | - Junxia Wang
- Integrative Microbiology Research Centre, College of Plant Protection, South China Agricultural University, Guangzhou, 510642, China; Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, 510642, China.
| | - Guangyuan Lu
- College of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China.
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11
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Chen HC, Huang SC, Chen YF, Kuo CW, Chen YH, Chang MC. Overexpression of OsERF106MZ promotes parental root growth in rice seedlings by relieving the ABA-mediated inhibition of root growth under salinity stress conditions. BMC PLANT BIOLOGY 2023; 23:144. [PMID: 36922804 PMCID: PMC10018881 DOI: 10.1186/s12870-023-04136-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Roots are essential for plant growth and have a variety of functions, such as anchoring the plant to the ground, absorbing water and nutrients from the soil, and sensing abiotic stresses, among others. OsERF106MZ is a salinity-induced gene that is expressed in germinating seeds and rice seedling roots. However, the roles of OsERF106MZ in root growth remain poorly understood. RESULTS Histochemical staining to examine β-glucuronidase (GUS) activity in transgenic rice seedlings harboring OsERF106MZp::GUS indicated that OsERF106MZ is mainly expressed in the root exodermis, sclerenchyma layer, and vascular system. OsERF106MZ overexpression in rice seedlings leads to an increase in primary root (PR) length. The phytohormone abscisic acid (ABA) is thought to act as a hidden architect of root system structure. The expression of the ABA biosynthetic gene OsAO3 is downregulated in OsERF106MZ-overexpressing roots under normal conditions, while the expression of OsNPC3, an AtNPC4 homolog involved in ABA sensitivity, is reduced in OsERF106MZ-overexpressing roots under both normal and NaCl-treated conditions. Under normal conditions, OsERF106MZ-overexpressing roots show a significantly reduced ABA level; moreover, exogenous application of 1.0 µM ABA can suppress OsERF106MZ-mediated root growth promotion. Additionally, OsERF106MZ-overexpressing roots display less sensitivity to ABA-mediated root growth inhibition when treated with 5.0 µM ABA under normal conditions or exposed to NaCl-treated conditions. Furthermore, chromatin immunoprecipitation (ChIP)-qPCR and luciferase (LUC) reporter assays showed that OsERF106MZ can bind directly to the sequence containing the GCC box in the promoter region of the OsAO3 gene and repress the expression of OsAO3. CONCLUSIONS OsERF106MZ may play a role in maintaining root growth for resource uptake when rice seeds germinate under salinity stress by alleviating ABA-mediated root growth inhibition.
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Affiliation(s)
- Hung-Chi Chen
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Shi-Cheng Huang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Yen-Fu Chen
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Che-Wei Kuo
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Ying-Hsuan Chen
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Men-Chi Chang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC.
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12
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Zhang P, Sun L, Liu F, Gao Q, Wang R, Ju Q, Xu J. Perfluorooctanoic acid and perfluorooctane sulfonic acid inhibit plant growth through the modulation of phytohormone signalling pathways: Evidence from molecular and genetic analysis in Arabidopsis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158287. [PMID: 36030856 DOI: 10.1016/j.scitotenv.2022.158287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) are the most representative perfluoroalkyl substances that accumulate in the food chain and are harmful to the environment. The uptake, translocation and physiological effects of PFOA and PFOS in plants have been reported in recent years; however, the regulatory mechanisms underlying PFOA- and PFOS-mediated plant growth and development remain largely unclear. Here, using Arabidopsis thaliana as the study material, we showed that both PFOA and PFOS inhibited plant growth; PFOS showed a stronger inhibitory effect on primary root (PR) growth, whereas PFOA exerted a stronger inhibitory effect on photosynthesis. Transcriptome analysis revealed that PFOA- and PFOS-modulated plant growth and development were correlated with the phytohormones auxin and abscisic acid (ABA). Further genetic analyses using mutants related to auxin biosynthesis, receptors and transport and mutants related to ABA biosynthesis and signalling transduction revealed that both PFOA and PFOS inhibited PR growth by modulating auxin biosynthesis and signalling pathways, and the ABA signalling pathway was also involved in PFOS-mediated PR growth inhibition. Collectively, these results shed new light on the molecular mechanisms of PFOA- and PFOS-mediated root system growth and their effects on phytohormone signalling pathways in plants.
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Affiliation(s)
- Ping Zhang
- College of Horticulture, Shanxi Agricultural University, Taigu 030801, China
| | - Liangliang Sun
- College of Horticulture, Shanxi Agricultural University, Taigu 030801, China
| | - Fei Liu
- College of Horticulture, Shanxi Agricultural University, Taigu 030801, China
| | - Qingqing Gao
- College of Horticulture, Shanxi Agricultural University, Taigu 030801, China
| | - Ruting Wang
- College of Horticulture, Shanxi Agricultural University, Taigu 030801, China
| | - Qiong Ju
- College of Horticulture, Shanxi Agricultural University, Taigu 030801, China
| | - Jin Xu
- College of Horticulture, Shanxi Agricultural University, Taigu 030801, China.
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13
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Gulyás Z, Moncsek B, Hamow KÁ, Stráner P, Tolnai Z, Badics E, Incze N, Darkó É, Nagy V, Perczel A, Kovács L, Soós V. D27-LIKE1 isomerase has a preference towards trans/cis and cis/cis conversions of carotenoids in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 112:1377-1395. [PMID: 36308414 DOI: 10.1111/tpj.16017] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Carotenoids contribute to a variety of physiological processes in plants, functioning also as biosynthesis precursors of ABA and strigolactones (SLs). SL biosynthesis starts with the enzymatic conversion of all-trans-β-carotene to 9-cis-β-carotene by the DWARF27 (D27) isomerase. In Arabidopsis, D27 has two closely related paralogs, D27-LIKE1 and D27-LIKE2, which were predicted to be β-carotene-isomerases. In the present study, we characterised D27-LIKE1 and identified some key aspects of its physiological and enzymatic functions in Arabidopsis. d27-like1-1 mutant does not display any strigolactone-deficient traits and exhibits a substantially higher 9-cis-violaxanthin content, which is accompanied by a slightly higher ABA level. In vitro feeding assays with recombinant D27-LIKE1 revealed that the protein exhibits affinity to all β-carotene isoforms but with an exclusive preference towards trans/cis conversions and the interconversion between 9-cis, 13-cis and 15-cis-β-carotene forms, and accepts zeaxanthin and violaxanthin as substrates. Finally, we present evidence showing that D27-LIKE1 mRNA is phloem mobile and D27-LIKE1 is an ancient isomerase with a long evolutionary history. In summary, we demonstrate that D27-LIKE1 is a carotenoid isomerase with multi-substrate specificity and has a characteristic preference towards the catalysation of cis/cis interconversion of carotenoids. Therefore, D27-LIKE1 is a potential regulator of carotenoid cis pools and, eventually, SL and ABA biosynthesis pathways.
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Affiliation(s)
- Zsolt Gulyás
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
| | - Blanka Moncsek
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
- Doctoral School of Biology, Institute of Biology, ELTE Eötvös Loránd University, Pázmány Péter s. 1/A, Budapest, 1117, Hungary
| | - Kamirán Áron Hamow
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
| | - Pál Stráner
- Laboratory of Structural Chemistry and Biology, MTA-ELTE Protein Modelling Research Group, Institute of Chemistry, Eötvös Loránd University, Pázmány Péter s. 1/A, Budapest, 1117, Hungary
| | - Zoltán Tolnai
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
| | - Eszter Badics
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
- Doctoral School of Biology, Institute of Biology, ELTE Eötvös Loránd University, Pázmány Péter s. 1/A, Budapest, 1117, Hungary
| | - Norbert Incze
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
- Doctoral School of Biology, Institute of Biology, ELTE Eötvös Loránd University, Pázmány Péter s. 1/A, Budapest, 1117, Hungary
| | - Éva Darkó
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
| | - Valéria Nagy
- Biological Research Centre, ELKH, 6726, Szeged, Temesvári krt. 62, Hungary
| | - András Perczel
- Laboratory of Structural Chemistry and Biology, MTA-ELTE Protein Modelling Research Group, Institute of Chemistry, Eötvös Loránd University, Pázmány Péter s. 1/A, Budapest, 1117, Hungary
| | - László Kovács
- Biological Research Centre, ELKH, 6726, Szeged, Temesvári krt. 62, Hungary
| | - Vilmos Soós
- Agricultural Institute, Centre for Agricultural Research, ELKH, Brunszvik u. 2, Martonvásár, 2462, Hungary
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14
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Parrilla J, Medici A, Gaillard C, Verbeke J, Gibon Y, Rolin D, Laloi M, Finkelstein RR, Atanassova R. Grape ASR Regulates Glucose Transport, Metabolism and Signaling. Int J Mol Sci 2022; 23:ijms23116194. [PMID: 35682874 PMCID: PMC9181829 DOI: 10.3390/ijms23116194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/24/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
To decipher the mediator role of the grape Abscisic acid, Stress, Ripening (ASR) protein, VvMSA, in the pathways of glucose signaling through the regulation of its target, the promoter of hexose transporter VvHT1, we overexpressed and repressed VvMSA in embryogenic and non-embryogenic grapevine cells. The embryogenic cells with organized cell proliferation were chosen as an appropriate model for high sensitivity to the glucose signal, due to their very low intracellular glucose content and low glycolysis flux. In contrast, the non-embryogenic cells displaying anarchic cell proliferation, supported by high glycolysis flux and a partial switch to fermentation, appeared particularly sensitive to inhibitors of glucose metabolism. By using different glucose analogs to discriminate between distinct pathways of glucose signal transduction, we revealed VvMSA positioning as a transcriptional regulator of the glucose transporter gene VvHT1 in glycolysis-dependent glucose signaling. The effects of both the overexpression and repression of VvMSA on glucose transport and metabolism via glycolysis were analyzed, and the results demonstrated its role as a mediator in the interplay of glucose metabolism, transport and signaling. The overexpression of VvMSA in the Arabidopsis mutant abi8 provided evidence for its partial functional complementation by improving glucose absorption activity.
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Affiliation(s)
- Jonathan Parrilla
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
| | - Anna Medici
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
- Institut des Sciences des Plantes de Montpellier (IPSiM), UMR CNRS/INRAE/Institut Agro/Université de Montpellier, 2 Place Pierre Viala, 34000 Montpellier, France
| | - Cécile Gaillard
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
| | - Jérémy Verbeke
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
- GReD-UMR CNRS 6293/INSERM U1103, CRBC, Faculté de Médecine, Université Clermont-Auvergne, 28 Place Henri Dunant, 63001 Clermont-Ferrand, France
| | - Yves Gibon
- UMR 1332 Biologie du Fruit et Pathologie (BFP), INRA, Université de Bordeaux, 33882 Bordeaux, France; (Y.G.); (D.R.)
| | - Dominique Rolin
- UMR 1332 Biologie du Fruit et Pathologie (BFP), INRA, Université de Bordeaux, 33882 Bordeaux, France; (Y.G.); (D.R.)
| | - Maryse Laloi
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
| | - Ruth R. Finkelstein
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA 93106, USA;
| | - Rossitza Atanassova
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
- Correspondence:
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15
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Li Z, Jiao Y, Zhang C, Dou M, Weng K, Wang Y, Xu Y. VvHDZ28 positively regulate salicylic acid biosynthesis during seed abortion in Thompson Seedless. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:1824-1838. [PMID: 33835678 PMCID: PMC8428834 DOI: 10.1111/pbi.13596] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 03/28/2021] [Indexed: 06/10/2023]
Abstract
Seedlessness in grapes is one of the features most appreciated by consumers. However, the mechanisms underlying seedlessness in grapes remain obscure. Here, we observe small globular embryos and globular embryos in Pinot Noir and Thompson Seedless from 20 to 30 days after flowering (DAF). From 40 to 50 DAF, we observe torpedo embryos and cotyledon embryos in Pinot Noir but aborted embryos and endosperm in Thompson Seedless. Thus, RNA-Seq analyses of seeds at these stages from Thompson Seedless and Pinot Noir were performed. A total of 6442 differentially expressed genes were identified. Among these, genes involved in SA biosynthesis, VvEDS1 and VvSARD1, were more highly expressed in Thompson Seedless than in Pinot Noir. Moreover, the content of endogenous SA is at least five times higher in Thompson Seedless than in Pinot Noir. Increased trimethylation of H3K27 of VvEDS1 and VvSARD1 may be correlated with lower SA content in Pinot Noir. We also demonstrate that VvHDZ28 positively regulates the expression of VvEDS1. Moreover, over-expression of VvHDZ28 results in seedless fruit and increased SA contents in Solanum lycopersicum. Our results reveal the potential role of SA and feedback regulation of VvHDZ28 in seedless grapes.
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Affiliation(s)
- Zhiqian Li
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Yuntong Jiao
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Chen Zhang
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Mengru Dou
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Kai Weng
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- College of life scienceNorthwest A&F UniversityYanglingChina
| | - Yuejin Wang
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Yan Xu
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
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16
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Hong Y, Yao J, Shi H, Chen Y, Zhu JK, Wang Z. The Arabidopsis spliceosomal protein SmEb modulates ABA responses by maintaining proper alternative splicing of HAB1. STRESS BIOLOGY 2021; 1:4. [PMID: 37676319 PMCID: PMC10441929 DOI: 10.1007/s44154-021-00006-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 07/22/2021] [Indexed: 09/08/2023]
Abstract
Abscisic acid (ABA) signaling is critical for seed germination and abiotic stress responses in terrestrial plants. Pre-mRNA splicing is known to regulate ABA signaling. However, the involvement of canonical spliceosomal components in regulating ABA signaling is poorly understood. Here, we show that the spliceosome component Sm core protein SmEb plays an important role in ABA signaling. SmEb expression is up-regulated by ABA treatment, and analysis of Arabidopsis smeb mutant plants suggest that SmEb modulates the alternative splicing of the ABA signaling component HAB1 by enhancing the HAB1.1 splicing variant while repressing HAB1.2. Overexpression of HAB1.1 but not HAB1.2 rescues the ABA-hypersensitive phenotype of smeb mutants. Mutations in the transcription factor ABI3, 4, or 5 also reduce the ABA hypersensitivity of smeb mutants during seed germination. Our results show that the spliceosomal component SmEb plays an important role in ABA regulation of seed germination and early seedling development.
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Affiliation(s)
- Yechun Hong
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
- University of Chinese Academy of Sciences (CAS), Shanghai, 200032, China
| | - Juanjuan Yao
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
- University of Chinese Academy of Sciences (CAS), Shanghai, 200032, China
| | - Huazhong Shi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409, USA
| | - Yunjuan Chen
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
- University of Chinese Academy of Sciences (CAS), Shanghai, 200032, China
| | - Jian-Kang Zhu
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 200032, Shanghai, China
| | - Zhen Wang
- Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, 200032, Shanghai, China.
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17
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Lamin-Samu AT, Farghal M, Ali M, Lu G. Morpho-Physiological and Transcriptome Changes in Tomato Anthers of Different Developmental Stages under Drought Stress. Cells 2021; 10:1809. [PMID: 34359978 PMCID: PMC8305550 DOI: 10.3390/cells10071809] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/12/2021] [Accepted: 07/14/2021] [Indexed: 11/17/2022] Open
Abstract
Drought limits the growth and productivity of plants. Reproductive development is sensitive to drought but the underlying physiological and molecular mechanisms remain unclear in tomatoes. Here, we investigated the effect of drought on tomato floral development using morpho-physiological and transcriptome analyses. Drought-induced male sterility through abnormal anther development includes pollen abortion, inadequate pollen starch accumulation and anther indehiscence which caused floral bud and opened flower abortions and reduced fruit set/yield. Under drought stress (DS), pollen mother cell to meiotic (PMC-MEI) anthers survived whereas tetrad to vacuolated uninucleate microspore (TED-VUM) anthers aborted. PMC-MEI anthers had lower ABA increase, reduced IAA and elevated sugar contents under DS relative to well-watered tomato plants. However, TED-VUM anthers had higher ABA increase and IAA levels, and lower accumulation of soluble sugars, indicating abnormal carbohydrate and hormone metabolisms when exposed to drought-stress conditions. Moreover, RNA-Seq analysis identified altogether >15,000 differentially expressed genes that were assigned to multiple pathways, suggesting that tomato anthers utilize complicated mechanisms to cope with drought. In particular, we found that tapetum development and ABA homeostasis genes were drought-induced while sugar utilization and IAA metabolic genes were drought-repressed in PMC-MEI anthers. Our results suggest an important role of phytohormones metabolisms in anther development under DS and provide novel insight into the molecular mechanism underlying drought resistance in tomatoes.
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Affiliation(s)
- Anthony Tumbeh Lamin-Samu
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; (A.T.L.-S.); (M.F.)
- Department of Biological Sciences, Faculty of Pure and Applied Sciences, Fourah Bay College, University of Sierra Leone, Mount Aureol, Freetown 232, Sierra Leone
| | - Mohamed Farghal
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; (A.T.L.-S.); (M.F.)
| | - Muhammad Ali
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; (A.T.L.-S.); (M.F.)
| | - Gang Lu
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; (A.T.L.-S.); (M.F.)
- Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agricultural, Zhejiang University, Hangzhou 310058, China
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18
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Chen DJ, Luo XG, Yan LH, Si CL, Wang N, He HP, Zhang TC. Transcriptome analysis of unsaturated fatty acids biosynthesis shows essential genes in sprouting of Acer truncatum Bunge seeds. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2020.100739] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zhang M, Cui G, Bai X, Ye Z, Zhang S, Xie K, Sun F, Zhang C, Xi Y. Regulatory Network of Preharvest Sprouting Resistance Revealed by Integrative Analysis of mRNA, Noncoding RNA, and DNA Methylation in Wheat. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:4018-4035. [PMID: 33769818 DOI: 10.1021/acs.jafc.1c00050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Preharvest sprouting (PHS) of grain occurs universally and sharply decreases grain quality and yield, but the mechanism remains unclear. MingXian169, a breeding inducer wheat for stripe rust, is widely used in the Huanghuai wheat-producing region, China. In this study, we found that MingXian169 could be considered an ideal material for PHS research because of its high PHS resistance. To further analyze the network of PHS, transcriptome sequencing of mRNA, noncoding RNA (ncRNA), and DNA methylome data were used to comparison germination seeds (GS) and dormant seeds (DS); 3027, 1516, and 22 genes and 95 103 methylation regions were identified as differentially expressed mRNA, DE-microRNAs (DE-miRNA), DE-long noncoding RNAs (DE-lncRNA), and differentially methylated regions (DMRs). Pathway enrichment tests highlighted plant hormone biosynthesis and signal transduction, glutathione-ascorbate metabolism, and starch and sucrose metabolism processes related to PHS mechanisms. Further analysis demonstrated that long noncoding RNA, miRNA, and DNA methylation played critical roles in transcriptional regulation of critical pathways during PHS by modifying and interacting with target genes. Quantitative real-time polymerase chain reaction (PCR) analyses of mRNA and miRNA confirmed the sequencing results. In the phytohormone content assay, abscisic acid (ABA) and jasmonic acid (JA) increased significantly in DS, and GA19 increased in GS. The ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), and β-d-glucosidase (BGLU) enzyme activities and the substance content of glutathione and sucrose were significantly higher in GS than in DS, implying that they were responsible for increasing PHS in MingXian169. Our results provide new insights into wheat PHS resistance at mRNA, ncRNA, and DNA methylation levels, with suggestions for crop breeding and production.
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Affiliation(s)
- Mingting Zhang
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
| | - Guibin Cui
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
- School of Life Sciences, Chongqing University, Chongqing 401331, People's Republic of China
| | - Xinchen Bai
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
| | - Zi Ye
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
| | - Shumeng Zhang
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
| | - Kunliang Xie
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
| | - Fengli Sun
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
| | - Chao Zhang
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
| | - Yajun Xi
- State Key Lab Crop Stress Biology Arid Areas, College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, People's Republic of China
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20
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Berrios L, Ely B. Genes related to redox and cell curvature facilitate interactions between Caulobacter strains and Arabidopsis. PLoS One 2021; 16:e0249227. [PMID: 33793620 PMCID: PMC8016251 DOI: 10.1371/journal.pone.0249227] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 03/12/2021] [Indexed: 12/28/2022] Open
Abstract
Bacteria play an integral role in shaping plant growth and development. However, the genetic factors that facilitate plant-bacteria interactions remain largely unknown. Here, we demonstrated the importance of two bacterial genetic factors that facilitate the interactions between plant-growth-promoting (PGP) bacteria in the genus Caulobacter and the host plant Arabidopsis. Using homologous recombination, we disrupted the cytochrome ubiquinol oxidase (cyo) operon in both C. vibrioides CB13 and C. segnis TK0059 by knocking out the expression of cyoB (critical subunit of the cyo operon) and showed that the mutant strains were unable to enhance the growth of Arabidopsis. In addition, disruption of the cyo operon, metabolomic reconstructions, and pH measurements suggested that both elevated cyoB expression and acid production by strain CB13 contribute to the previously observed inhibition of Arabidopsis seed germination. We also showed that the crescent shape of the PGP bacterial strain C. crescentus CB15 contributes to its ability to enhance plant growth. Thus, we have identified specific genetic factors that explain how select Caulobacter strains interact with Arabidopsis plants.
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Affiliation(s)
- Louis Berrios
- Department of Biological Sciences, University of South Carolina, Columbia, SC, United State of America
- * E-mail:
| | - Bert Ely
- Department of Biological Sciences, University of South Carolina, Columbia, SC, United State of America
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21
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González-Hernández AI, Scalschi L, García-Agustín P, Camañes G. Tomato root development and N assimilation depend on C and ABA content under different N sources. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 148:368-378. [PMID: 32028134 DOI: 10.1016/j.plaphy.2020.01.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
Root plasticity is controlled by hormonal homeostasis and nutrient availability. In this work, we have determined the influence of different N regimens on growth parameters and on the expression of genes involved in auxin transport and N-assimilation in tomato seedlings. NH4+ nutrition led to an inhibitory effect on root fresh weight (FW), lateral root (LR) number and root density, while an increase in the primary root (PR) length was observed. The expression of N assimilation genes GS2 and ASN1, is affected by NH4+ nutrition. Moreover, in order to relieve the toxic effect of NH4+ on root development, glucose or 2-oxoglutarate was supplied as a C source during NH4+ treatment. The addition of 2-oxoglutarate improved root parameters compared to the NH4+ regimen. N-assimilation gene analysis showed that NH4+-fed tomato plants try to alleviate the toxic effect by concurrently upregulating ASN1 and anaplerotic PEPC2 expression, whereas when 2-oxoglutarate is supplied, ASN1 induction was not observed. The addition of both C skeletons induced the expression of the ROS-scavenging genes GSH and SOD. In addition, since ABA plays a role in root development, the ABA-synthesis-defective mutant flacca was studied under NO3- and NH4+ regimens. It displayed a decrease in LR number under NO3- conditions, whereas, the NH4+-fed seedlings showed a decrease solely in PR length that was reverted when ABA was exogenously supplied. Moreover, flacca seedlings displayed a reprogramming of the N/C assimilation genes. Altogether, these results reflect the importance of N and C sources and ABA homeostasis in root development of tomato seedlings.
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Affiliation(s)
- Ana Isabel González-Hernández
- Grupo de Bioquímica y Biotecnología, Área de Fisiología Vegetal, Departamento de Ciencias Agrarias y Del Medio Natural, ESTCE, Universitat Jaume I, 12071, Castellón, Spain.
| | - Loredana Scalschi
- Grupo de Bioquímica y Biotecnología, Área de Fisiología Vegetal, Departamento de Ciencias Agrarias y Del Medio Natural, ESTCE, Universitat Jaume I, 12071, Castellón, Spain.
| | - Pilar García-Agustín
- Grupo de Bioquímica y Biotecnología, Área de Fisiología Vegetal, Departamento de Ciencias Agrarias y Del Medio Natural, ESTCE, Universitat Jaume I, 12071, Castellón, Spain.
| | - Gemma Camañes
- Grupo de Bioquímica y Biotecnología, Área de Fisiología Vegetal, Departamento de Ciencias Agrarias y Del Medio Natural, ESTCE, Universitat Jaume I, 12071, Castellón, Spain.
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22
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Yang Y, Guo Y, Zhong J, Zhang T, Li D, Ba T, Xu T, Chang L, Zhang Q, Sun M. Root Physiological Traits and Transcriptome Analyses Reveal that Root Zone Water Retention Confers Drought Tolerance to Opisthopappus taihangensis. Sci Rep 2020; 10:2627. [PMID: 32060321 PMCID: PMC7021704 DOI: 10.1038/s41598-020-59399-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 01/16/2020] [Indexed: 12/22/2022] Open
Abstract
Opisthopappus taihangensis (Ling) Shih, as a relative of chrysanthemum, mainly survives on the cracks of steep slopes and cliffs. Due to the harsh environment in which O. taihangensis lives, it has evolved strong adaptive traits to drought stress. The root system first perceives soil water deficiency, triggering a multi-pronged response mechanism to maintain water potential; however, the drought tolerance mechanism of O. taihangensis roots remains unclear. Therefore, roots were selected as materials to explore the physiological and molecular responsive mechanisms. We found that the roots had a stronger water retention capacity than the leaves. This result was attributed to ABA accumulation, which promoted an increased accumulation of proline and trehalose to maintain cell osmotic pressure, activated SOD and POD to scavenge ROS to protect root cell membrane structure and induced suberin depositions to minimize water backflow to dry soil. Transcriptome sequencing analyses further confirmed that O. taihangensis strongly activated genes involved in the ABA signalling pathway, osmolyte metabolism, antioxidant enzyme activity and biosynthesis of suberin monomer. Overall, these results not only will provide new insights into the drought response mechanisms of O. taihangensis but also will be helpful for future drought breeding programmes of chrysanthemum.
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Affiliation(s)
- Yongjuan Yang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Yanhong Guo
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Jian Zhong
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Tengxun Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Dawei Li
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Tingting Ba
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Ting Xu
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Lina Chang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Qixiang Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, 100083, China
| | - Ming Sun
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, China.
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23
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Devkar V, Thirumalaikumar VP, Xue GP, Vallarino JG, Turečková V, Strnad M, Fernie AR, Hoefgen R, Mueller-Roeber B, Balazadeh S. Multifaceted regulatory function of tomato SlTAF1 in the response to salinity stress. THE NEW PHYTOLOGIST 2020; 225:1681-1698. [PMID: 31597191 DOI: 10.1111/nph.16247] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 09/29/2019] [Indexed: 05/11/2023]
Abstract
Salinity stress limits plant growth and has a major impact on agricultural productivity. Here, we identify NAC transcription factor SlTAF1 as a regulator of salt tolerance in cultivated tomato (Solanum lycopersicum). While overexpression of SlTAF1 improves salinity tolerance compared with wild-type, lowering SlTAF1 expression causes stronger salinity-induced damage. Under salt stress, shoots of SlTAF1 knockdown plants accumulate more toxic Na+ ions, while SlTAF1 overexpressors accumulate less ions, in accordance with an altered expression of the Na+ transporter genes SlHKT1;1 and SlHKT1;2. Furthermore, stomatal conductance and pore area are increased in SlTAF1 knockdown plants during salinity stress, but decreased in SlTAF1 overexpressors. We identified stress-related transcription factor, abscisic acid metabolism and defence-related genes as potential direct targets of SlTAF1, correlating it with reactive oxygen species scavenging capacity and changes in hormonal response. Salinity-induced changes in tricarboxylic acid cycle intermediates and amino acids are more pronounced in SlTAF1 knockdown than wild-type plants, but less so in SlTAF1 overexpressors. The osmoprotectant proline accumulates more in SlTAF1 overexpressors than knockdown plants. In summary, SlTAF1 controls the tomato's response to salinity stress by combating both osmotic stress and ion toxicity, highlighting this gene as a promising candidate for the future breeding of stress-tolerant crops.
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Affiliation(s)
- Vikas Devkar
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476, Potsdam-Golm, Germany
| | - Venkatesh P Thirumalaikumar
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476, Potsdam-Golm, Germany
| | - Gang-Ping Xue
- CSIRO Agriculture and Food, St Lucia, Qld, 4067, Australia
| | - José G Vallarino
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Veronika Turečková
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany, Palacký University, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Miroslav Strnad
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany, Palacký University, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Rainer Hoefgen
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Bernd Mueller-Roeber
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476, Potsdam-Golm, Germany
| | - Salma Balazadeh
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, the Netherlands
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24
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Zhang S, Jia T, Zhang Z, Zou X, Fan S, Lei K, Jiang X, Niu D, Yuan Y, Shang H. Insight into the relationship between S-lignin and fiber quality based on multiple research methods. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 147:251-261. [PMID: 31884241 DOI: 10.1016/j.plaphy.2019.12.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 11/18/2019] [Accepted: 12/20/2019] [Indexed: 06/10/2023]
Abstract
Cotton (Gossypium hirsutum) is an important cash crop, providing people with high quality natural fiber. Lignin is the main component of cotton fiber, second only to cellulose. As a main substance filled in the cellulose framework during the secondary wall thickening process, lignin plays a key role in the formation of cotton fiber quality. However, the mechanism behind it is still unclear. In this research, we screened candidate genes involved in lignin biosynthesis based on analysis of cotton genome and transcriptome sequence data. The authenticity of the transcriptome data was verified by qRT-PCR assay. Total 62 genes were identified from nine gene families. In the process, we found the key gene GhCAD7 that affects the biosynthesis of S-lignin and the ratio of syringyl/guaiacyl (S/G). In addition, in combination with the metabolites and transcriptome profiles of the line 0-153 with high fiber quality and the line sGK9708 with low fiber quality during cotton fiber development, we speculate that the ratio of syringyl/guaiacyl (S/G) is inseparable from the quality of cotton fiber. Finally, the S-type lignin synthesis branch may play a more important role in the formation of high-quality fiber. This work provides insights into the synthesis of lignin in cotton and lays the foundation for future research into improving fiber quality.
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Affiliation(s)
- Shuya Zhang
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Tingting Jia
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Zhen Zhang
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Xianyan Zou
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Senmiao Fan
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Kang Lei
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Xiao Jiang
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Doudou Niu
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China
| | - Youlu Yuan
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China.
| | - Haihong Shang
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China; School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001, Henan, China.
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25
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Fang Q, Wang X, Wang H, Tang X, Liu C, Yin H, Ye S, Jiang Y, Duan Y, Luo K. The poplar R2R3 MYB transcription factor PtrMYB94 coordinates with abscisic acid signaling to improve drought tolerance in plants. TREE PHYSIOLOGY 2020; 40:46-59. [PMID: 31728530 DOI: 10.1093/treephys/tpz113] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 07/26/2019] [Accepted: 10/08/2019] [Indexed: 05/07/2023]
Abstract
In plants, R2R3 MYB transcription factors (TFs) consist of one large gene family and are involved in the regulation of many developmental processes and various stresses. However, the functions of most of MYB TFs in woody plants remain unknown. Here, PtrMYB94, an R2R3 MYB TF from Populus trichocarpa, is characterized to be involved in the regulation of drought responses and abscisic acid (ABA) signaling. PtrMYB94 encodes a nuclear-localized R2R3 MYB TF. RT-PCR results showed that the PtrMYB94 transcripts were relatively abundant in leaves and stems, and were induced rapidly in response to dehydration stress. Overexpression of PtrMYB94 improved plant drought responses, suggesting that this MYB TF may functionally regulate poplar adaptability to drought stress. Furthermore, the analysis of transcriptional expression and PtrMYB94 promoter: GUS activity showed that PtrMYB94 responded to ABA induction. PtrMYB94-overexpressing plants exhibited the inhibition of seed germination compared with the wild-type (WT) control under ABA exposure condition. The ABA content was evidently increased in the PtrMYB94-overexpressing plants relative to the WT plants. In addition, transcript levels of several ABA- and drought-responsive genes, such as ABA1 and DREB2B, were up-regulated. Taken together, our results suggest that PtrMYB94 is involved in an ABA-dependent drought stress regulation in Populus.
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Affiliation(s)
- Qing Fang
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China
- Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Biological Science and Technology, Hubei Minzu University, Enshi 445000, China
| | - Xianqiang Wang
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Haiyang Wang
- Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Biological Science and Technology, Hubei Minzu University, Enshi 445000, China
| | - Xiaowen Tang
- Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Biological Science and Technology, Hubei Minzu University, Enshi 445000, China
| | - Chi Liu
- Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Biological Science and Technology, Hubei Minzu University, Enshi 445000, China
| | - Heng Yin
- Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Biological Science and Technology, Hubei Minzu University, Enshi 445000, China
| | - Shenglong Ye
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Yuanzhong Jiang
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Yanjiao Duan
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Keming Luo
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China
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26
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Xu F, Tang J, Gao S, Cheng X, Du L, Chu C. Control of rice pre-harvest sprouting by glutaredoxin-mediated abscisic acid signaling. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 100:1036-1051. [PMID: 31436865 DOI: 10.1111/tpj.14501] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/27/2019] [Accepted: 08/07/2019] [Indexed: 05/18/2023]
Abstract
Pre-harvest sprouting (PHS) is one of the major problems in cereal production worldwide, which causes significant losses of both yield and quality; however, the molecular mechanism underlying PHS remains largely unknown. Here, we identified a dominant PHS mutant phs9-D. The corresponding gene PHS9 encodes a higher plant unique CC-type glutaredoxin and is specifically expressed in the embryo at the late embryogenesis stage, implying that PHS9 plays some roles in the late stage of seed development. Yeast two-hybrid screening showed that PHS9 could interact with OsGAP, which is an interaction partner of the abscicic acid (ABA) receptor OsRCAR1. PHS9- or OsGAP overexpression plants showed reduced ABA sensitivity in seed germination, whereas PHS9 or OsGAP knock-out mutant plants showed increased ABA sensitivity in seed germination, suggesting that PHS9 and OsGAP acted as negative regulators in ABA signaling during seed germination. Interestingly, the germination of PHS9 and OsGAP overexpression or knock-out plant seeds was weakly promoted by H2 O2 , implying that PHS9 and OsGAP could affect reactive oxygen species (ROS) signaling during seed germination. These results indicate that PHS9 plays an important role in the regulation of rice PHS through the integration of ROS signaling and ABA signaling.
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Affiliation(s)
- Fan Xu
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, China
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Jiuyou Tang
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Shaopei Gao
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Xi Cheng
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Lin Du
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, China
| | - Chengcai Chu
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
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27
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Li Z, Liu C, Zhang Y, Wang B, Ran Q, Zhang J. The bHLH family member ZmPTF1 regulates drought tolerance in maize by promoting root development and abscisic acid synthesis. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:5471-5486. [PMID: 31267122 PMCID: PMC6793450 DOI: 10.1093/jxb/erz307] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 06/13/2019] [Indexed: 05/21/2023]
Abstract
Drought stress is the most important environmental stress limiting maize production. ZmPTF1, a phosphate starvation-induced basic helix-loop-helix (bHLH) transcription factor, contributes to root development and low-phosphate tolerance in maize. Here, ZmPTF1 expression, drought tolerance, and the underlying mechanisms were studied by using maize ZmPTF1 overexpression lines and mutants. ZmPTF1 was found to be a positive regulator of root development, ABA synthesis, signalling pathways, and drought tolerance. ZmPTF1 was also found to bind to the G-box element within the promoter of 9-cis-epoxycarotenoid dioxygenase (NCED), C-repeat-binding factor (CBF4), ATAF2/NAC081, NAC30, and other transcription factors, and to act as a positive regulator of the expression of those genes. The dramatically upregulated NCEDs led to increased abscisic acid (ABA) synthesis and activation of the ABA signalling pathway. The up-regulated transcription factors hierarchically regulate the expression of genes involved in root development, stress responses, and modifications of transcriptional regulation. The improved root system, increased ABA content, and activated ABA-, CBF4-, ATAF2-, and NAC30-mediated stress responses increased the drought tolerance of the ZmPTF1 overexpression lines, while the mutants showed opposite trends. This study describes a useful gene for transgenic breeding and helps us understand the role of a bHLH protein in plant root development and stress responses.
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Affiliation(s)
- Zhaoxia Li
- School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Can Liu
- School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Ying Zhang
- School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Baomei Wang
- School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Qijun Ran
- School of Life Sciences, Shandong University, Jinan, Shandong, China
| | - Juren Zhang
- School of Life Sciences, Shandong University, Jinan, Shandong, China
- Correspondence:
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Overexpression of VIRE2-INTERACTING PROTEIN2 in Arabidopsis regulates genes involved in Agrobacterium-mediated plant transformation and abiotic stresses. Sci Rep 2019; 9:13503. [PMID: 31534160 PMCID: PMC6751215 DOI: 10.1038/s41598-019-49590-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 08/19/2019] [Indexed: 11/23/2022] Open
Abstract
Arabidopsis VIRE2-INTERACTING PROTEIN2 (VIP2) was previously described as a protein with a NOT domain, and Arabidopsis vip2 mutants are recalcitrant to Agrobacterium-mediated root transformation. Here we show that VIP2 is a transcription regulator and the C-terminal NOT2 domain of VIP2 interacts with VirE2. Interestingly, AtVIP2 overexpressor lines in Arabidopsis did not show an improvement in Agrobacterium-mediated stable root transformation, but the transcriptome analysis identified 1,634 differentially expressed genes compared to wild-type. These differentially expressed genes belonged to various functional categories such as membrane proteins, circadian rhythm, signaling, response to stimulus, regulation of plant hypersensitive response, sequence-specific DNA binding transcription factor activity and transcription regulatory region binding. In addition to regulating genes involved in Agrobacterium-mediated plant transformation, AtVIP2 overexpressor line showed differential expression of genes involved in abiotic stresses. The majority of the genes involved in abscisic acid (ABA) response pathway, containing the Abscisic Acid Responsive Element (ABRE) element within their promoters, were down-regulated in AtVIP2 overexpressor lines. Consistent with this observation, AtVIP2 overexpressor lines were more susceptible to ABA and other abiotic stresses. Based on the above findings, we hypothesize that VIP2 not only plays a role in Agrobacterium-mediated plant transformation but also acts as a general transcriptional regulator in plants.
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Lv MJ, Wan W, Yu F, Meng LS. New Insights into the Molecular Mechanism Underlying Seed Size Control under Drought Stress. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:9697-9704. [PMID: 31403787 DOI: 10.1021/acs.jafc.9b02497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In higher plants, seed size is an important parameter and agricultural trait in many aspects of evolutionary fitness. The loss of water-deficiency-induced crop yield is the largest among all natural hazards. Under water-deficient stress, the most prevalent response to terminal stress is to accelerate the early arrest of floral development and, thereby, to accelerate fruit/seed production, which consequently reduces seed size. This phenomenon is well-known, but its molecular mechanism is not well-reviewed and characterized. However, increasing evidence have indicated that water-deficient stress is always coordinated with three genetic signals (i.e., seed size regulators, initial seed size, and fruit number) that decide the final seed size. Here, our review presents new insights into the mechanism underlying cross-talk water-deficient stress signaling with three genetic signals controlling final seed size. These new insights may aid in preliminary screening, identifying novel genetic factors and future design strategies, or breeding to increase crop yield.
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Affiliation(s)
- Meng-Jiao Lv
- Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , People's Republic of China
| | - Wen Wan
- Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , People's Republic of China
| | - Fei Yu
- Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , People's Republic of China
| | - Lai-Sheng Meng
- Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , People's Republic of China
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Yoshida T, Christmann A, Yamaguchi-Shinozaki K, Grill E, Fernie AR. Revisiting the Basal Role of ABA - Roles Outside of Stress. TRENDS IN PLANT SCIENCE 2019; 24:625-635. [PMID: 31153771 DOI: 10.1016/j.tplants.2019.04.008] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/23/2019] [Accepted: 04/26/2019] [Indexed: 05/04/2023]
Abstract
The physiological roles of abscisic acid (ABA) as a stress hormone in plant responses to water shortage, including stomatal regulation and gene expression, have been well documented. However, less attention has been paid to the function of basal ABA synthesized under well-watered conditions in recent studies. In this review, we summarize progress in the understanding of how low concentrations of ABA are perceived at the molecular level and how its signaling affects plant metabolism and growth under nonstressed conditions. We also discuss the dual nature of ABA in acting as an inhibitor and activator of plant growth and development.
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Affiliation(s)
- Takuya Yoshida
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany.
| | - Alexander Christmann
- Lehrstuhl für Botanik, Technische Universität München, D-85354 Freising, Germany
| | - Kazuko Yamaguchi-Shinozaki
- Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 113-8657 Tokyo, Japan
| | - Erwin Grill
- Lehrstuhl für Botanik, Technische Universität München, D-85354 Freising, Germany
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
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31
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Zhu Z, Li G, Yan C, Liu L, Zhang Q, Han Z, Li B. DRL1, Encoding A NAC Transcription Factor, Is Involved in Leaf Senescence in Grapevine. Int J Mol Sci 2019; 20:ijms20112678. [PMID: 31151316 PMCID: PMC6600502 DOI: 10.3390/ijms20112678] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 01/01/2023] Open
Abstract
The NAC (for NAM, ATAF1,2, and CUC2) proteins family are plant-specific transcription factors, which play important roles in leaf development and response to environmental stresses. In this study, an NAC gene, DRL1, isolated from grapevine Vitis vinifera L. "Yatomi Rose", was shown to be involved in leaf senescence. The quantity of DRL1 transcripts decreased with advancing leaf senescence in grapevine. Overexpressing the DRL1 gene in tobacco plants significantly delayed leaf senescence with respect to chlorophyll concentration, potential quantum efficiency of photosystem II (Fv/Fm), and ion leakage. Moreover, exogenous abscisic acid (ABA) markedly reduced the expression of DRL1, and the ABA and salicylic acid (SA) concentration was lower in the DRL1-overexpressing transgenic plants than in the wild-type plants. The DRL1 transgenic plants exhibited reduced sensitivity to ABA-induced senescence but no significant change in the sensitivity to jasmonic acid-, SA- or ethylene-induced senescence. Transcriptomic analysis and RNA expression studies also indicated that the transcript abundance of genes associated with ABA biosynthesis and regulation, including 9-cis-epoxycarotenoid dioxygenase (NCED1), NCED5, zeaxanthin epoxidase1 (ZEP1), ABA DEFICIENT2 (ABA2), ABA4, and ABA INSENSITIVE 2 (ABI2), was markedly reduced in the DRL1-overexpressing plants. These results suggested that DRL1 plays a role as a negative regulator of leaf senescence by regulating ABA synthesis.
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Affiliation(s)
- Ziguo Zhu
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Guirong Li
- College of Horticulture and Landscape Architecture, Henan Institute of Science and Technology, Xinxiang 453003, China.
| | - Chaohui Yan
- College of Horticulture and Landscape Architecture, Henan Institute of Science and Technology, Xinxiang 453003, China.
| | - Li Liu
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Qingtian Zhang
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Zhen Han
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Bo Li
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
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Differential Function of Endogenous and Exogenous Abscisic Acid during Bacterial Pattern-Induced Production of Reactive Oxygen Species in Arabidopsis. Int J Mol Sci 2019; 20:ijms20102544. [PMID: 31126160 PMCID: PMC6566928 DOI: 10.3390/ijms20102544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 05/13/2019] [Accepted: 05/13/2019] [Indexed: 01/09/2023] Open
Abstract
Abscisic acid (ABA) plays important roles in positively or negatively regulating plant disease resistance to pathogens. Here, we reassess the role of endogenous and exogenous ABA by using: 35S::ABA2, a previously reported transgenic Arabidopsis line with increased endogenous ABA levels; aba2-1, a previously reported ABA2 mutant with reduced endogenous ABA levels; and exogenous application of ABA. We found that bacterial susceptibility promoted by exogenous ABA was suppressed in 35S::ABA2 plants. The 35S::ABA2 and aba2-1 plants displayed elevated and reduced levels, respectively, of bacterial flagellin peptide (flg22)-induced H2O2. Surprisingly, ABA pre-treatment reduced flg22-induced H2O2 generation. Exogenous, but not endogenous ABA, increased catalase activity. Loss of nicotinamide adenine dinucleotide phosphate oxidase genes, RBOHD and RBOHF, restored exogenous ABA-promoted bacterial susceptibility of 35S::ABA2 transgenic plants. In addition, endogenous and exogenous ABA had similar effects on callose deposition and salicylic acid (SA) signaling. These results reveal an underlying difference between endogenous and exogenous ABA in regulating plant defense responses. Given that some plant pathogens are able to synthesize ABA and affect endogenous ABA levels in plants, our results highlight the importance of reactive oxygen species in the dual function of ABA during plant-pathogen interactions.
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Zhang Z, Kang C, Zhang S, Li X. Transcript analyses reveal a comprehensive role of abscisic acid in modulating fruit ripening in Chinese jujube. BMC PLANT BIOLOGY 2019; 19:189. [PMID: 31068143 PMCID: PMC6505321 DOI: 10.1186/s12870-019-1802-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/26/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND Chinese jujube (Ziziphus jujuba Mill.) is a non-climacteric fruit; however, the underlying mechanism of ripening and the role of abscisic acid involved in this process are not yet understood for this species. RESULTS In the present study, a positive correlation between dynamic changes in endogenous ABA and the onset of jujube ripening was determined. Transcript analyses suggested that the expression balance among genes encoding nine-cis-epoxycarotenoid dioxygenase (ZjNCED3), ABA-8'-hydroxylase (ZjCYP707A2), and beta-glucosidase (ZjBG4, ZjBG5, ZjBG8, and ZjBG9) has an important role in maintaining ABA accumulation, while the expression of a receptor (ZjPYL8), protein phosphatase 2C (ZjPP2C4-8), and sucrose nonfermenting 1-related protein kinase 2 (ZjSnRK2-2 and ZjSnRK2-5) is important in regulating fruit sensitivity to ABA applications. In addition, white mature 'Dongzao' fruit were harvested and treated with 50 mg L- 1 ABA or 50 mg L- 1 nordihydroguaiaretic acid (NDGA) to explore the role of ABA in jujube fruit ripening. By comparative transcriptome analyses, 1103 and 505 genes were differentially expressed in response to ABA and NDGA applications on the 1st day after treatment, respectively. These DEGs were associated with photosynthesis, secondary, lipid, cell wall, and starch and sugar metabolic processes, suggesting the involvement of ABA in modulating jujube fruit ripening. Moreover, ABA also exhibited crosstalk with other phytohormones and transcription factors, indicating a regulatory network for jujube fruit ripening. CONCLUSIONS Our study further elucidated ABA-associated metabolic and regulatory processes. These findings are helpful for improving strategies for jujube fruit storage and for gaining insights into understand complex non-climacteric fruit ripening processes.
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Affiliation(s)
- Zhong Zhang
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
- Key Comprehensive Laboratory of Forestry of Shaanxi Province, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Chenxuan Kang
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Shuyi Zhang
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
- Forestry Administration of Linwei District, Weinan, 714000 Shaanxi China
| | - Xingang Li
- College of Forestry, Northwest A&F University, Yangling, 712100 Shaanxi China
- Key Comprehensive Laboratory of Forestry of Shaanxi Province, Northwest A&F University, Yangling, 712100 Shaanxi China
- Research Centre for Jujube Engineering and Technology of State Forestry and Grassland Administration, Northwest A&F University, Yangling, 712100 Shaanxi China
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Xia Q, Ponnaiah M, Thanikathansubramanian K, Corbineau F, Bailly C, Nambara E, Meimoun P, El-Maarouf-Bouteau H. Re-localization of hormone effectors is associated with dormancy alleviation by temperature and after-ripening in sunflower seeds. Sci Rep 2019; 9:4861. [PMID: 30890715 PMCID: PMC6424972 DOI: 10.1038/s41598-019-40494-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 02/15/2019] [Indexed: 11/23/2022] Open
Abstract
Temperature is the primary factor that affects seed dormancy and germination. However, the molecular mechanism that underlies its effect on dormancy alleviation remained largely unknown. In this study, we investigate hormone involvement in temperature induced germination as compared to that caused by after-ripening. Dormant (D) sunflower seeds cannot germinate at 10 °C but fully germinate at 20 °C. After-ripened seeds become non-dormant (ND), i.e. able to germinate at 10 °C. Pharmacological experiments showed the importance of abscisic acid (ABA), gibberellins (GAs) and ethylene in temperature- and after-ripening-induced germination of sunflower seeds. Hormone quantification showed that after-ripening is mediated by a decline in both ABA content and sensitivity while ABA content is increased in D seeds treated at 10 or 20 °C, suggesting that ABA decrease is not a prerequisite for temperature induced dormancy alleviation. GAs and ethylene contents were in accordance with germination potential of the three conditions (GA1 was higher in D 20 °C and ND 10 °C than in D 10 °C). Transcripts analysis showed that the major change concerns ABA and GAs metabolism genes, while ABA signalling gene expression was significantly unchanged. Moreover, another level of hormonal regulation at the subcellular localization has been revealed by immunocytolocalization study. Indeed, ABA, protein Abscisic acid-Insensitive 5 (ABI5), involved in ABA-regulated gene expression and DELLA protein RGL2, a repressor of the gibberellins signalling pathway, localized mainly in the nucleus in non-germinating seeds while they localized in the cytosol in germinating seeds. Furthermore, ACC-oxidase (ACO) protein, the key ethylene biosynthesis enzyme, was detected in the meristem only in germinating seeds. Our results reveal the importance of hormone actors trafficking in the cell and their regulation in specialized tissue such as the meristem in dormancy alleviation and germination.
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Affiliation(s)
- Qiong Xia
- Sorbonne Université, CNRS, Biologie du développement Paris Seine - Institut de Biologie Paris Seine, LBD - IBPS, 75005, Paris, France
| | - Maharajah Ponnaiah
- Sorbonne Université, CNRS, Biologie du développement Paris Seine - Institut de Biologie Paris Seine, LBD - IBPS, 75005, Paris, France
| | - Kaviya Thanikathansubramanian
- Sorbonne Université, CNRS, Biologie du développement Paris Seine - Institut de Biologie Paris Seine, LBD - IBPS, 75005, Paris, France
| | - Françoise Corbineau
- Sorbonne Université, CNRS, Biologie du développement Paris Seine - Institut de Biologie Paris Seine, LBD - IBPS, 75005, Paris, France
| | - Christophe Bailly
- Sorbonne Université, CNRS, Biologie du développement Paris Seine - Institut de Biologie Paris Seine, LBD - IBPS, 75005, Paris, France
| | - Eiji Nambara
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON, M5S 3B2, Canada
| | - Patrice Meimoun
- Sorbonne Université, CNRS, Biologie du développement Paris Seine - Institut de Biologie Paris Seine, LBD - IBPS, 75005, Paris, France
| | - Hayat El-Maarouf-Bouteau
- Sorbonne Université, CNRS, Biologie du développement Paris Seine - Institut de Biologie Paris Seine, LBD - IBPS, 75005, Paris, France.
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Kochan E, Balcerczak E, Szymczyk P, Sienkiewicz M, Zielińska-Bliźniewska H, Szymańska G. Abscisic Acid Regulates the 3-Hydroxy-3-methylglutaryl CoA Reductase Gene Promoter and Ginsenoside Production in Panax quinquefolium Hairy Root Cultures. Int J Mol Sci 2019; 20:ijms20061310. [PMID: 30875925 PMCID: PMC6471273 DOI: 10.3390/ijms20061310] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/12/2019] [Accepted: 03/13/2019] [Indexed: 12/22/2022] Open
Abstract
Panax quinquefolium hairy root cultures synthesize triterpenoid saponins named ginsenosides, that have multidirectional pharmacological activity. The first rate-limiting enzyme in the process of their biosynthesis is 3-hydroxy-3-methylglutaryl CoA reductase (HMGR). In this study, a 741 bp fragment of the P. quinquefoliumHMGR gene (PqHMGR), consisting of a proximal promoter, 5′UTR (5′ untranslated region) and 5′CDS (coding DNA sequence) was isolated. In silico analysis of an isolated fragment indicated a lack of tandem repeats, miRNA binding sites, and CpG/CpNpG elements. However, the proximal promoter contained potential cis-elements involved in the response to light, salicylic, and abscisic acid (ABA) that was represented by the motif ABRE (TACGTG). The functional significance of ABA on P. quinquefolium HMGR gene expression was evaluated, carrying out quantitative RT-PCR experiments at different ABA concentrations (0.1, 0.25, 0.5, and 1 mg·L−1). Additionally, the effect of abscisic acid and its time exposure on biomass and ginsenoside level in Panax quinquefolium hairy root was examined. The saponin content was determined using HPLC. The 28 day elicitation period with 1 mg·L−1 ABA was the most efficient for Rg2 and Re (17.38 and 1.83 times increase, respectively) accumulation; however, the protopanaxadiol derivative content decreased in these conditions.
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Affiliation(s)
- Ewa Kochan
- Department of Pharmaceutical Biotechnology, Medical University of Lodz, Muszyńskiego l, 90-151 Lodz, Poland.
| | - Ewa Balcerczak
- Laboratory of Molecular Diagnostics and Pharmacogenomics, Department of Pharmaceutical Biochemistry and Molecular Diagnostics, Interfaculty Cathedral of Laboratory and Molecular Diagnostics, Medical University of Lodz, Muszyńskiego 1, 90-151 Lodz, Poland.
| | - Piotr Szymczyk
- Department of Pharmaceutical Biotechnology, Medical University of Lodz, Muszyńskiego l, 90-151 Lodz, Poland.
| | - Monika Sienkiewicz
- Department of Allergology and Respiratory Rehabilitation, 2nd Chair of Otolaryngology, Medical University of Lodz, Żeligowskiego 7/9, 90-725, Lodz, Poland.
| | - Hanna Zielińska-Bliźniewska
- Department of Allergology and Respiratory Rehabilitation, 2nd Chair of Otolaryngology, Medical University of Lodz, Żeligowskiego 7/9, 90-725, Lodz, Poland.
| | - Grażyna Szymańska
- Department of Pharmaceutical Biotechnology, Medical University of Lodz, Muszyńskiego l, 90-151 Lodz, Poland.
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Chen HC, Cheng WH, Hong CY, Chang YS, Chang MC. The transcription factor OsbHLH035 mediates seed germination and enables seedling recovery from salt stress through ABA-dependent and ABA-independent pathways, respectively. RICE (NEW YORK, N.Y.) 2018; 11:50. [PMID: 30203325 PMCID: PMC6134479 DOI: 10.1186/s12284-018-0244-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 09/05/2018] [Indexed: 05/22/2023]
Abstract
BACKGROUND Many transcription factors (TFs), such as those in the basic helix-loop-helix (bHLH) family, are important for regulating plant growth and plant responses to abiotic stress. The expression of OsbHLH035 is induced by drought and salinity. However, its functional role in rice growth, development, and the salt response is still unknown. RESULTS The bHLH TF OsbHLH035 is a salt-induced gene that is primarily expressed in germinating seeds and seedlings. Stable expression of GFP-fused OsbHLH035 in rice transgenic plants revealed that this protein is predominantly localized to the nucleus. Osbhlh035 mutants show delayed seed germination, particularly under salt-stress conditions. In parallel, abscisic acid (ABA) contents are over-accumulated, and the expression of the ABA biosynthetic genes OsABA2 and OsAAO3 is upregulated; furthermore, compared with that in wild-type (WT) seedlings, the salt-induced expression of OsABA8ox1, an ABA catabolic gene, in germinating Osbhlh035 mutant seeds is downregulated. Moreover, Osbhlh035 mutant seedlings are unable to recover from salt-stress treatment. Consistently, sodium is over-accumulated in aerial tissues but slightly reduced in terrestrial tissues from Osbhlh035 seedlings after salt treatment. Additionally, the expression of the sodium transporters OsHKT1;3 and 1;5 is reduced in Osbhlh035 aerial and terrestrial tissues, respectively. Furthermore, genetic complementation can restore both the delayed seed germination and the impaired recovery of salt-treated Osbhlh035 seedlings to normal growth. CONCLUSION OsbHLH035 mediates seed germination and seedling recovery after salt stress relief through the ABA-dependent and ABA-independent activation of OsHKT pathways, respectively.
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Affiliation(s)
- Hung-Chi Chen
- Department of Agronomy, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, Taiwan, Republic of China
| | - Wan-Hsing Cheng
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China
| | - Chwan-Yang Hong
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China
| | - Yu-Sen Chang
- Department of Horticulture and Landscape Architecture, National Taiwan University, Taipei, Taiwan, Republic of China
| | - Men-Chi Chang
- Department of Agronomy, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, Taiwan, Republic of China.
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Martel C, Blair LK, Donohue K. PHYD prevents secondary dormancy establishment of seeds exposed to high temperature and is associated with lower PIL5 accumulation. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3157-3169. [PMID: 29648603 PMCID: PMC5972622 DOI: 10.1093/jxb/ery140] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 04/04/2018] [Indexed: 05/23/2023]
Abstract
Dormancy cycling controls the seasonal conditions under which seeds germinate, and these conditions strongly influence growth and survival of plants. Several endogenous and environmental signals affect the dormancy status of seeds. Factors such as time, light, and temperature influence the balance between abscisic acid (ABA) and gibberellic acid (GA), two phytohormones that play a key role in seed dormancy and germination. High temperatures have been shown to increase ABA level and prevent seed germination, a process known as thermoinhibition. High temperature can also cause the acquisition of secondary dormancy, preventing germination of seeds upon their return to favorable germination conditions. The mechanisms and conditions linking thermoinhibition and secondary dormancy remain unclear. Phytochromes are photoreceptors known to promote seed germination of many plant species including Arabidopsis thaliana. Here, we demonstrate a role for PHYD in modulating secondary dormancy acquisition in seeds exposed to high temperature. We found that a functional PHYD gene is required for the germination of seeds that experienced high temperature, and that ABA- and GA-related gene expression during and after pre-incubation at high temperatures was altered in a phyD mutant. We further show that the level of PHYD mRNA increased in seeds pre-incubated at high temperature and that this increase correlates with efficient removal of the germination repressor PIL5.
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Affiliation(s)
| | - Logan K Blair
- Department of Biology, Duke University, Durham, NC, USA
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Huang KC, Lin WC, Cheng WH. Salt hypersensitive mutant 9, a nucleolar APUM23 protein, is essential for salt sensitivity in association with the ABA signaling pathway in Arabidopsis. BMC PLANT BIOLOGY 2018; 18:40. [PMID: 29490615 PMCID: PMC5831739 DOI: 10.1186/s12870-018-1255-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 02/21/2018] [Indexed: 05/03/2023]
Abstract
BACKGROUND Although the nucleolus involves two major functions: pre-rRNA processing and ribosome biogenesis/assembly, increasing evidence indicates that it also plays important roles in response to abiotic stress. However, the possible regulatory mechanisms underlying the nucleolar proteins responsive to abiotic stress are largely unknown. High salinity is one of the major abiotic stresses, which hinders plant growth and productivity. Here, genetic screening approach was used to identify a salt hypersensitive mutant 9 (sahy9) mutant, also known as apum23, in Arabidopsis thaliana. Functional characterization of SAHY9/APUM23 through analyses of gene/protein expression profiles and metabolites was performed to decipher the possible regulatory mechanisms of the nucleolar protein SAHY9/APUM23 in response to salt stress. RESULTS Seedlings of the sahy9/apum23 mutant displayed postgermination developmental arrest and then became bleached after prolonged culture under various salt stresses. Transcriptomic and proteomic analyses of salt-treated sahy9/apum23 and wild-type seedlings revealed differential expression of genes/proteins that have similar functional categories of biological processes, primarily those involved in cellular and metabolic processes as well as abiotic and biotic stress responses. However, the consistency of differential gene expression at both the transcript and protein levels was low (~ 12%), which suggests the involvement of posttranscriptional processing during the salt response. Furthermore, the altered expression of genes and proteins mediated by SAHY9/APUM23 regarding salt sensitivity involves abscisic acid (ABA) biosynthesis and signaling, abiotic stress responses, and ribosome biogenesis-related genes. Importantly, NCED3, ABI2, PP2CA, and major ABA-responsive marker genes, such as RD20 and RD29B, were down-regulated at both the transcript and protein levels in conjunction with lower contents of ABA and changes in the expression of a subset of LEA proteins in sahy9/apum23 mutants under salt stress. Moreover, the salt hypersensitivity of the sahy9/apum23 mutant was largely rescued by the exogenous application of ABA during salt stress. CONCLUSION Our results revealed that SAHY9/APUM23 regulated the expression of ribosome biogenesis-related genes and proteins, which further affected the ribosome composition and abundance, and potential posttranscriptional regulation. The salt hypersensitivity of sahy9/apum23 is associated with the ABA-mediated signaling pathway and the downstream stress-responsive network of this pathway.
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Affiliation(s)
- Kai-Chau Huang
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
| | - Wei-Chih Lin
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
| | - Wan-Hsing Cheng
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan
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Hwang SG, Lee CY, Tseng CS. Heterologous expression of rice 9-cis-epoxycarotenoid dioxygenase 4 (OsNCED4) in Arabidopsis confers sugar oversensitivity and drought tolerance. BOTANICAL STUDIES 2018; 59:2. [PMID: 29335785 PMCID: PMC5768580 DOI: 10.1186/s40529-018-0219-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/10/2018] [Indexed: 05/11/2023]
Abstract
BACKGROUND The 9-cis-epoxycarotenoid dioxygenases OsNCED4 was cloned from rice in conjunction with OsNCED 1-3 and 5, of which 3 has been shown to function in ABA biosynthesis and alteration of leaf morphology. In higher plants, NCEDs have been shown to be key enzymes controlling ABA biosynthesis and belong to a differentially expressed gene family. Aside from OsNCED3, it remains largely unknown if other OsNCED genes are involved in ABA biosynthesis in rice. Thus, transgenic Arabidopsis plants overexpressing OsNCED4 were generated in the 129B08/nced3 mutant background to explore OsNCED4 function in ABA biosynthesis. RESULTS Heterologous expression of OsNCED4 in Arabidopsis increased ABA levels and altered plant size and leaf shape, delayed seed germination, caused sugar oversensitivity in post-germination growth, and enhanced tolerance to drought. The native OsNCED3 and OsNCED4 promoters were expressed in an overlapping pattern in rice seeds and young seedlings, suggesting possible functional redundancy between OsNCED3 and OsNCED4. At the one-leaf stage, similar regulation of OsNCED3 and OsNCED4 gene expression in roots or leaves in response to moderate salt stress (150 mM NaCl) was observed. CONCLUSION Like OsNCED3, OsNCED4 is functionally active in ABA biosynthesis in rice. OsNCED3 and OsNCED4 might play redundant roles in controlling ABA biosynthesis in rice, as suggested by GUS staining assay, but this should be further analyzed through complementation of rice NCED knockout mutants.
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Affiliation(s)
- San-Gwang Hwang
- Department of Horticulture, National Chung Hsing University, 145 Xingda Road, South District, Taichung, 40227 Taiwan, ROC
| | - Chia-Yun Lee
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529 Taiwan, ROC
| | - Ching-Shan Tseng
- Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan, No.189, Zhongzheng Road, Wufeng District, Taichung, 41362 Taiwan, ROC
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Vishal B, Kumar PP. Regulation of Seed Germination and Abiotic Stresses by Gibberellins and Abscisic Acid. FRONTIERS IN PLANT SCIENCE 2018; 9:838. [PMID: 29973944 PMCID: PMC6019495 DOI: 10.3389/fpls.2018.00838] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/30/2018] [Indexed: 05/19/2023]
Abstract
Overall growth and development of a plant is regulated by complex interactions among various hormones, which is critical at different developmental stages. Some of the key aspects of plant growth include seed development, germination and plant survival under unfavorable conditions. Two of the key phytohormones regulating the associated physiological processes are gibberellins (GA) and abscisic acid (ABA). GAs participate in numerous developmental processes, including, seed development and seed germination, seedling growth, root proliferation, determination of leaf size and shape, flower induction and development, pollination and fruit expansion. Despite the association with abiotic stresses, ABA is essential for normal plant growth and development. It plays a critical role in different abiotic stresses by regulating various downstream ABA-dependent stress responses. Plants maintain a balance between GA and ABA levels constantly throughout the developmental processes at different tissues and organs, including under unfavorable environmental or physiological conditions. Here, we will review the literature on how GA and ABA control different stages of plant development, with focus on seed germination and selected abiotic stresses. The possible crosstalk of ABA and GA in specific events of the above processes will also be discussed, with emphasis on downstream stress signaling components, kinases and transcription factors (TFs). The importance of several key ABA and GA signaling intermediates will be illustrated. The knowledge gained from such studies will also help to establish a solid foundation to develop future crop improvement strategies.
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Huang Y, Guo Y, Liu Y, Zhang F, Wang Z, Wang H, Wang F, Li D, Mao D, Luan S, Liang M, Chen L. 9- cis-Epoxycarotenoid Dioxygenase 3 Regulates Plant Growth and Enhances Multi-Abiotic Stress Tolerance in Rice. FRONTIERS IN PLANT SCIENCE 2018; 9:162. [PMID: 29559982 PMCID: PMC5845534 DOI: 10.3389/fpls.2018.00162] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/29/2018] [Indexed: 05/20/2023]
Abstract
Although abscisic acid (ABA) is an important hormone that regulates seed dormancy, stomatal closure, plant development, as well as responses to environmental stimuli, the physiological mechanisms of ABA response to multiple stress in rice remain poorly understood. In the ABA biosynthetic pathway, 9-cis-epoxycarotenoid dioxygenase (NCED) is the key rate-limiting enzyme. Here, we report important functions of OsNCED3 in multi-abiotic stress tolerance in rice. The OsNCED3 is constitutively expressed in various tissues under normal condition, Its expression is highly induced by NaCl, PEG, and H2O2 stress, suggesting the roles for OsNCED3 in response to the multi-abiotic stress tolerance in rice. Compared with wild-type plants, nced3 mutants had earlier seed germination, longer post-germination seedling growth, increased sensitivity to water stress and H2O2 stress and increased stomata aperture under water stress and delayed leaf senescence. Further analysis found that nced3 mutants contained lower ABA content compared with wild-type plants, overexpression of OsNCED3 in transgenic plants could enhance water stress tolerance, promote leaf senescence and increase ABA content. We conclude that OsNCED3 mediates seed dormancy, plant growth, abiotic stress tolerance, and leaf senescence by regulating ABA biosynthesis in rice; and may provide a new strategy for improving the quality of crop.
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Murgia I, Morandini P. Iron Deficiency Prolongs Seed Dormancy in Arabidopsis Plants. FRONTIERS IN PLANT SCIENCE 2017; 8:2077. [PMID: 29276522 PMCID: PMC5727067 DOI: 10.3389/fpls.2017.02077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 11/21/2017] [Indexed: 05/21/2023]
Abstract
The understanding of seed dormancy, germination and longevity are important goals in plant biology, with relevant applications for agriculture, food industry and also human nutrition. Reactive Oxygen Species (ROS) are key molecules involved in the release of dormancy, when their concentrations fall within the so called 'oxidative window.' The mechanisms of ROS distribution and sensing in seeds, from dormant to germinating ones, still need elucidation. Also, the impact of iron (Fe) deficiency on seed dormancy is still unexplored; this is surprising, given the known pro-oxidant role of Fe when in a free form. We provide evidence of a link between plant Fe nutrition and dormancy of progeny seeds by using different Arabidopsis ecotypes and mutants with different dormancy strengths grown in control soil or under severe Fe deficiency. The latter condition extends the dormancy in several genotypes. The focus on the mechanisms involved in the Fe deficiency-dependent alteration of dormancy and longevity promises to be a key issue in seed (redox) biology.
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Affiliation(s)
- Irene Murgia
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milan, Italy
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Chen HC, Hsieh-Feng V, Liao PC, Cheng WH, Liu LY, Yang YW, Lai MH, Chang MC. The function of OsbHLH068 is partially redundant with its homolog, AtbHLH112, in the regulation of the salt stress response but has opposite functions to control flowering in Arabidopsis. PLANT MOLECULAR BIOLOGY 2017; 94:531-548. [PMID: 28631168 PMCID: PMC5504132 DOI: 10.1007/s11103-017-0624-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 06/12/2017] [Indexed: 05/20/2023]
Abstract
KEY MESSAGE The homologous genes OsbHLH068 and AtbHLH112 have partially redundant functions in the regulation of the salt stress response but opposite functions to control flowering in Arabidopsis. The transcription factor (TF) basic/Helix-Loop-Helix (bHLH) is important for plant growth, development, and stress responses. OsbHLH068, which is a homologous gene of AtbHLH112 that is up-regulated under drought and salt stresses, as indicated by previous microarray data analysis. However, the intrinsic function of OsbHLH068 remains unknown. In the present study, we characterized the function and compared the role of OsbHLH068 with that of its homolog, AtbHLH112. Histochemical GUS staining indicated that OsbHLH068 and AtbHLH112 share a similar expression pattern in transgenic Arabidopsis during the juvenile-to-adult phase transition. Heterologous overexpression of OsbHLH068 in Arabidopsis delays seed germination, decreases salt-induced H2O2 accumulation, and promotes root elongation, whereas AtbHLH112 knock-out mutant displays an opposite phenotype. Both OsbHLH068-overexpressing transgenic Arabidopsis seedlings and the Atbhlh112 mutant display a late-flowering phenotype. Moreover, the expression of OsbHLH068-GFP driven by an AtbHLH112 promoter can compensate for the germination deficiency in the Atbhlh112 mutant, but the delayed-flowering phenotype tends to be more severe. Further analysis by microarray and qPCR indicated that the expression of FT is down-regulated in both OsbHLH068-overexpressing Arabidopsis plants and Atbhlh112 mutant plants, whereas SOC1 but not FT is highly expressed in AtbHLH112-overexpressing Arabidopsis plants. A comparative transcriptomic analysis also showed that several stress-responsive genes, such as AtERF15 and AtPUB23, were affected in both OsbHLH068- and AtbHLH112-overexpressing transgenic Arabidopsis plants. Thus, we propose that OsbHLH068 and AtbHLH112 share partially redundant functions in the regulation of abiotic stress responses but have opposite functions to control flowering in Arabidopsis, presumably due to the evolutionary functional divergence of homolog-encoded proteins.
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Affiliation(s)
- Hung-Chi Chen
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Vicki Hsieh-Feng
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Pei-Chun Liao
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Wan-Hsing Cheng
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, ROC
| | - Li-Yu Liu
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Yun-Wei Yang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC
| | - Ming-Hsin Lai
- Crop Science Division, Taiwan Agricultural Research Institute, Taichung, Taiwan, ROC
| | - Men-Chi Chang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan, ROC.
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Huang Y, Lin C, He F, Li Z, Guan Y, Hu Q, Hu J. Exogenous spermidine improves seed germination of sweet corn via involvement in phytohormone interactions, H 2O 2 and relevant gene expression. BMC PLANT BIOLOGY 2017; 17:1. [PMID: 28049439 PMCID: PMC5209872 DOI: 10.1186/s12870-016-0951-9] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 12/13/2016] [Indexed: 05/18/2023]
Abstract
BACKGROUND The low seed vigor and poor field emergence are main factors that restricting the extension of sweet corn in China. Spermidine (Spd) plays an important role in plant growth and development, but little is known about the effect of Spd on sweet corn seed germination. Therefore the effect of exogenous Spd on seed germination and physiological and biochemical changes during seed imbibition of Xiantian No.5 were investigated in this study. RESULTS Spd soaking treatment not only improved seed germination percentage but also significantly enhanced seed vigor which was indicated by higher germination index, vigor index, shoot heights and dry weights of shoot and root compared with the control; while exogenous CHA, the biosynthesis inhibitor of Spd, significantly inhibited seed germination and declined seed vigor. Spd application significantly increased endogenous Spd, gibberellins and ethylene contents and simultaneously reduced ABA concentration in embryos during seed imbibition. In addition, the effects of exogenous Spd on H2O2 and MDA productions were also analyzed. Enhanced H2O2 concentration was observed in Spd-treated seed embryo, while no significant difference of MDA level in seed embryo was observed between Spd treatment and control. However, the lower H2O2 and significantly higher MDA contents than control were detected in CHA-treated seed embryos. CONCLUSIONS The results suggested that Spd contributing to fast seed germination and high seed vigor of sweet corn might be closely related with the metabolism of hormones including gibberellins, ABA and ethylene, and with the increase of H2O2 in the radical produced partly from Spd oxidation. In addition, Spd might play an important role in cell membrane integrity maintaining.
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Affiliation(s)
- Yutao Huang
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Cheng Lin
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Fei He
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Zhan Li
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Yajing Guan
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Qijuan Hu
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
| | - Jin Hu
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058 China
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Shu K, Qi Y, Chen F, Meng Y, Luo X, Shuai H, Zhou W, Ding J, Du J, Liu J, Yang F, Wang Q, Liu W, Yong T, Wang X, Feng Y, Yang W. Salt Stress Represses Soybean Seed Germination by Negatively Regulating GA Biosynthesis While Positively Mediating ABA Biosynthesis. FRONTIERS IN PLANT SCIENCE 2017; 8:1372. [PMID: 28848576 PMCID: PMC5554363 DOI: 10.3389/fpls.2017.01372] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 07/24/2017] [Indexed: 05/20/2023]
Abstract
Soybean is an important and staple oilseed crop worldwide. Salinity stress has adverse effects on soybean development periods, especially on seed germination and post-germinative growth. Improving seed germination and emergence will have positive effects under salt stress conditions on agricultural production. Here we report that NaCl delays soybean seed germination by negatively regulating gibberellin (GA) while positively mediating abscisic acid (ABA) biogenesis, which leads to a decrease in the GA/ABA ratio. This study suggests that fluridone (FLUN), an ABA biogenesis inhibitor, might be a potential plant growth regulator that can promote soybean seed germination under saline stress. Different soybean cultivars, which possessed distinct genetic backgrounds, showed a similar repressed phenotype during seed germination under exogenous NaCl application. Biochemical analysis revealed that NaCl treatment led to high MDA (malondialdehyde) level during germination and the post-germinative growth stages. Furthermore, catalase, superoxide dismutase, and peroxidase activities also changed after NaCl treatment. Subsequent quantitative Real-Time Polymerase Chain Reaction analysis showed that the transcription levels of ABA and GA biogenesis and signaling genes were altered after NaCl treatment. In line with this, phytohormone measurement also revealed that NaCl considerably down-regulated active GA1, GA3, and GA4 levels, whereas the ABA content was up-regulated; and therefore ratios, such as GA1/ABA, GA3/ABA, and GA4/ABA, are decreased. Consistent with the hormonal quantification, FLUN partially rescued the delayed-germination phenotype caused by NaCl-treatment. Altogether, these results demonstrate that NaCl stress inhibits soybean seed germination by decreasing the GA/ABA ratio, and that FLUN might be a potential plant growth regulator that could promote soybean seed germination under salinity stress.
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Affiliation(s)
- Kai Shu
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
- *Correspondence: Kai Shu, Wenyu Yang,
| | - Ying Qi
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Feng Chen
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Yongjie Meng
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Xiaofeng Luo
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Haiwei Shuai
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Wenguan Zhou
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Jun Ding
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan UniversityWuhan, China
| | - Junbo Du
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Jiang Liu
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Feng Yang
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Qiang Wang
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Weiguo Liu
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Taiwen Yong
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Xiaochun Wang
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
| | - Yuqi Feng
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan UniversityWuhan, China
| | - Wenyu Yang
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural UniversityChengdu, China
- *Correspondence: Kai Shu, Wenyu Yang,
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Riboni M, Robustelli Test A, Galbiati M, Tonelli C, Conti L. ABA-dependent control of GIGANTEA signalling enables drought escape via up-regulation of FLOWERING LOCUS T in Arabidopsis thaliana. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:6309-6322. [PMID: 27733440 PMCID: PMC5181575 DOI: 10.1093/jxb/erw384] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
One strategy deployed by plants to endure water scarcity is to accelerate the transition to flowering adaptively via the drought escape (DE) response. In Arabidopsis thaliana, activation of the DE response requires the photoperiodic response gene GIGANTEA (GI) and the florigen genes FLOWERING LOCUS T (FT) and TWIN SISTER OF FT (TSF). The phytohormone abscisic acid (ABA) is also required for the DE response, by promoting the transcriptional up-regulation of the florigen genes. The mode of interaction between ABA and the photoperiodic genes remains obscure. In this work we use a genetic approach to demonstrate that ABA modulates GI signalling and consequently its ability to activate the florigen genes. We also reveal that the ABA-dependent activation of FT, but not TSF, requires CONSTANS (CO) and that impairing ABA signalling dramatically reduces the expression of florigen genes with little effect on the CO transcript profile. ABA signalling thus has an impact on the core genes of photoperiodic signalling GI and CO by modulating their downstream function and/or activities rather than their transcript accumulation. In addition, we show that as well as promoting flowering, ABA simultaneously represses flowering, independent of the florigen genes. Genetic analysis indicates that the target of the repressive function of ABA is the flowering-promoting gene SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1), a transcription factor integrating floral cues in the shoot meristem. Our study suggests that variations in ABA signalling provide different developmental information that allows plants to co-ordinate the onset of the reproductive phase according to the available water resources.
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Affiliation(s)
- Matteo Riboni
- Department of BioSciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Alice Robustelli Test
- Department of BioSciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Massimo Galbiati
- Department of BioSciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Chiara Tonelli
- Department of BioSciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Lucio Conti
- Department of BioSciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
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Verslues PE. ABA and cytokinins: challenge and opportunity for plant stress research. PLANT MOLECULAR BIOLOGY 2016; 91:629-640. [PMID: 26910054 DOI: 10.1007/s11103-016-0458-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 02/19/2016] [Indexed: 06/05/2023]
Abstract
Accumulation of the stress hormone abscisic acid (ABA) induces many cellular mechanisms associated with drought resistance. Recent years have seen a rapid advance in our knowledge of how increased ABA levels are perceived by ABA receptors, particularly the PYL/RCAR receptors, but there has been relatively less new information about how ABA accumulation is controlled and matched to stress severity. ABA synthesis and catabolism, conjugation and deconjugation to glucose, and ABA transport all are involved in controlling ABA levels. This highly buffered system of ABA metabolism represents both a challenge and opportunity in developing a mechanistic understanding of how plants detect and respond to drought. Recent data have also shown that direct manipulation of cytokinin levels in transgenic plants has dramatic effect on drought phenotypes and prompted new interest in the role of cytokinins and cytokinin signaling in drought. Both ABA and cytokinins will continue to be major foci of drought research but likely with different trajectories both in terms of basic research and in translational research aimed at increasing plant performance during drought.
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Affiliation(s)
- Paul E Verslues
- Institute of Plant and Microbial Biology, Academia Sinica, No. 128 Sec. 2 Academia Rd, Nankang Dist., Taipei, 11529, Taiwan.
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Ma F, Ni L, Liu L, Li X, Zhang H, Zhang A, Tan M, Jiang M. ZmABA2, an interacting protein of ZmMPK5, is involved in abscisic acid biosynthesis and functions. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:771-82. [PMID: 26096642 DOI: 10.1111/pbi.12427] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 04/24/2015] [Accepted: 04/27/2015] [Indexed: 05/08/2023]
Abstract
In maize (Zea mays), the mitogen-activated protein kinase ZmMPK5 has been shown to be involved in abscisic acid (ABA)-induced antioxidant defence and to enhance the tolerance of plants to drought, salt stress and oxidative stress. However, the underlying molecular mechanisms are poorly understood. Here, using ZmMPK5 as bait in yeast two-hybrid screening, a protein interacting with ZmMPK5 named ZmABA2, which belongs to a member of the short-chain dehydrogenase/reductase family, was identified. Pull-down assay and bimolecular fluorescence complementation analysis and co-immunoprecipitation test confirmed that ZmMPK5 interacts with ZmABA2 in vitro and in vivo. Phosphorylation of Ser173 in ZmABA2 by ZmMPK5 was shown to increase the activity of ZmABA2 and the protein stability. Various abiotic stimuli induced the expression of ZmABA2 in leaves of maize plants. Pharmacological, biochemical and molecular biology and genetic analyses showed that both ZmMPK5 and ZmABA2 coordinately regulate the content of ABA. Overexpression of ZmABA2 in tobacco plants was found to elevate the content of ABA, regulate seed germination and root growth under drought and salt stress and enhance the tolerance of tobacco plants to drought and salt stress. These results suggest that ZmABA2 is a direct target of ZmMPK5 and is involved in ABA biosynthesis and functions.
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Affiliation(s)
- Fangfang Ma
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Lan Ni
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Libo Liu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Xi Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Huan Zhang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Aying Zhang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingpu Tan
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingyi Jiang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
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49
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Zhong C, Xu H, Ye S, Wang S, Li L, Zhang S, Wang X. Gibberellic Acid-Stimulated Arabidopsis6 Serves as an Integrator of Gibberellin, Abscisic Acid, and Glucose Signaling during Seed Germination in Arabidopsis. PLANT PHYSIOLOGY 2015; 169:2288-303. [PMID: 26400990 PMCID: PMC4634064 DOI: 10.1104/pp.15.00858] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 09/20/2015] [Indexed: 05/03/2023]
Abstract
The DELLA protein REPRESSOR OF ga1-3-LIKE2 (RGL2) plays an important role in seed germination under different conditions through a number of transcription factors. However, the functions of the structural genes associated with RGL2-regulated germination are less defined. Here, we report the role of an Arabidopsis (Arabidopsis thaliana) cell wall-localized protein, Gibberellic Acid-Stimulated Arabidopsis6 (AtGASA6), in functionally linking RGL2 and a cell wall loosening expansin protein (Arabidopsis expansin A1 [AtEXPA1]), resulting in the control of embryonic axis elongation and seed germination. AtGASA6-overexpressing seeds showed precocious germination, whereas transfer DNA and RNA interference mutant seeds displayed delayed seed germination under abscisic acid, paclobutrazol, and glucose (Glc) stress conditions. The differences in germination rates resulted from corresponding variation in cell elongation in the hypocotyl-radicle transition region of the embryonic axis. AtGASA6 was down-regulated by RGL2, GLUCOSE INSENSITIVE2, and ABSCISIC ACID-INSENSITIVE5 genes, and loss of AtGASA6 expression in the gasa6 mutant reversed the insensitivity shown by the rgl2 mutant to paclobutrazol and the gin2 mutant to Glc-induced stress, suggesting that it is involved in regulating both the gibberellin and Glc signaling pathways. Furthermore, it was found that the promotion of seed germination and length of embryonic axis by AtGASA6 resulted from a promotion of cell elongation at the embryonic axis mediated by AtEXPA1. Taken together, the data indicate that AtGASA6 links RGL2 and AtEXPA1 functions and plays a role as an integrator of gibberellin, abscisic acid, and Glc signaling, resulting in the regulation of seed germination through a promotion of cell elongation.
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Affiliation(s)
- Chunmei Zhong
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Hao Xu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Siting Ye
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Shiyi Wang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Lingfei Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Shengchun Zhang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Xiaojing Wang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
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50
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Wang T, Tohge T, Ivakov A, Mueller-Roeber B, Fernie AR, Mutwil M, Schippers JHM, Persson S. Salt-Related MYB1 Coordinates Abscisic Acid Biosynthesis and Signaling during Salt Stress in Arabidopsis. PLANT PHYSIOLOGY 2015; 169:1027-41. [PMID: 26243618 PMCID: PMC4587467 DOI: 10.1104/pp.15.00962] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 08/03/2015] [Indexed: 05/18/2023]
Abstract
Abiotic stresses, such as salinity, cause global yield loss of all major crop plants. Factors and mechanisms that can aid in plant breeding for salt stress tolerance are therefore of great importance for food and feed production. Here, we identified a MYB-like transcription factor, Salt-Related MYB1 (SRM1), that negatively affects Arabidopsis (Arabidopsis thaliana) seed germination under saline conditions by regulating the levels of the stress hormone abscisic acid (ABA). Accordingly, several ABA biosynthesis and signaling genes act directly downstream of SRM1, including SALT TOLERANT1/NINE-CIS-EPOXYCAROTENOID DIOXYGENASE3, RESPONSIVE TO DESICCATION26, and Arabidopsis NAC DOMAIN CONTAINING PROTEIN19. Furthermore, SRM1 impacts vegetative growth and leaf shape. We show that SRM1 is an important transcriptional regulator that directly targets ABA biosynthesis and signaling-related genes and therefore may be regarded as an important regulator of ABA-mediated salt stress tolerance.
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Affiliation(s)
- Ting Wang
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
| | - Takayuki Tohge
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
| | - Alexander Ivakov
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
| | - Bernd Mueller-Roeber
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
| | - Alisdair R Fernie
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
| | - Marek Mutwil
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
| | - Jos H M Schippers
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
| | - Staffan Persson
- Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
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