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Shah FA, Chen Z, Ni F, Kamal KA, Zhang J, Chen J, Ren J. ArNAC148 induces Acer rubrum leaf senescence by activating the transcription of the ABA receptor gene ArPYR13. Int J Biol Macromol 2024; 279:134950. [PMID: 39226982 DOI: 10.1016/j.ijbiomac.2024.134950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 08/20/2024] [Accepted: 08/20/2024] [Indexed: 09/05/2024]
Abstract
Acer rubrum, an ornamental tree known for its stunning autumn colors, has an elusive molecular mechanism that governs its leaf senescence. We performed the genome-wide analysis of NAC transcription factor genes and PYRABACTIN RESISTANCE1-LIKE (PYLs) and found that ArNAC148 and ArPYL13 were significantly upregulated in senescing leaves as compared to mature leaves. Subcellular localization studies confirmed the nuclear localization of ArNAC148 and the cytoplasmic localization of ArPYL13. Electrophoretic mobility shift assay and yeast one-hybrid assay demonstrated that ArNAC148 directly binds to the promoter of ArPYL13. Luciferase reporter assays further showed that ArNAC148 activates the transcription of ArPYL13. The transient expression of ArNAC148 and ArPYL13 in tobacco leaves promoted chlorophyll degradation, increased H2O2 level, MDA contents, and electrolyte leakage in response to abscisic acid (ABA). Moreover, the virus-induced gene silencing of ArNAC148 and ArPYL13 in A. rubrum produced results that were opposite to those observed in transient expression experiments. Our findings suggest that ArNAC148 induces leaf senescence by directly activating the transcription of ArPYL13, providing insights into the ABA-mediated regulatory mechanisms governing leaf senescence in A. rubrum. This study offers new perspectives for researchers to explore the roles of NAC and PYL genes in regulating leaf senescence in woody ornamental plants.
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Affiliation(s)
- Faheem Afzal Shah
- Institute of Agricultural Engineering, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Zhu Chen
- Institute of Agricultural Engineering, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Fang Ni
- Anhui Wenda University of Information Engineering, Anhui Province, Anhui 230032, China
| | - Khan Arif Kamal
- Institute of Agricultural Engineering, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Jimei Zhang
- Institute of Agricultural Engineering, Anhui Academy of Agricultural Sciences, Hefei 230031, China
| | - Jinhuan Chen
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Jie Ren
- Institute of Agricultural Engineering, Anhui Academy of Agricultural Sciences, Hefei 230031, China.
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2
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Zheng S, Chen J, He Y, Lu J, Chen H, Liang Z, Zhang J, Liu Z, Li J, Zhuang C. The OsAGO2-OsNAC300-OsNAP module regulates leaf senescence in rice. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024. [PMID: 39171847 DOI: 10.1111/jipb.13766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 07/28/2024] [Indexed: 08/23/2024]
Abstract
Leaves play a crucial role in the growth and development of rice (Oryza sativa) as sites for the production of photosynthesis. Early leaf senescence leads to substantial drops in rice yields. Whether and how DNA methylation regulates gene expression and affects leaf senescence remains elusive. Here, we demonstrate that mutations in rice ARGONAUTE 2 (OsAGO2) lead to premature leaf senescence, with chloroplasts in Osago2 having lower chlorophyll content and an abnormal thylakoid structure compared with those from wild-type plants. We show that OsAGO2 associates with a 24-nt microRNA and binds to the promoter region of OsNAC300, which causes DNA methylation and suppressed expression of OsNAC300. Overexpressing OsNAC300 causes the similar premature leaf senescence as Osago2 mutants and knocking out OsNAC300 in the Osago2 mutant background suppresses the early senescence of Osago2 mutants. Based on yeast one-hybrid, dual-luciferase, and electrophoresis mobility shift assays, we propose that OsNAC300 directly regulates transcription of the key rice aging gene NAC-like, activated by APETALA3/PISTILLATA (OsNAP) to control leaf senescence. Our results unravel a previously unknown epigenetic regulatory mechanism underlying leaf senescence in which OsAGO2-OsNAC300-OsNAP acts as a key regulatory module of leaf senescence to maintain leaf function.
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Affiliation(s)
- Shaoyan Zheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Junyu Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Ying He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Jingqin Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Hong Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Zipeng Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Junqi Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Zhenlan Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Jing Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Chuxiong Zhuang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
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3
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Dai Y, Chen H, Li Y, Hui R, Zhang Z. Promising New Methods Based on the SOD Enzyme and SAUR36 Gene to Screen for Canola Materials with Heavy Metal Resistance. BIOLOGY 2024; 13:441. [PMID: 38927321 PMCID: PMC11200428 DOI: 10.3390/biology13060441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 05/30/2024] [Accepted: 06/08/2024] [Indexed: 06/28/2024]
Abstract
Canola is the largest self-produced vegetable oil source in China, although excessive levels of cadmium, lead, and arsenic seriously affect its yield. Therefore, developing methods to identify canola materials with good heavy metal tolerance is a hot topic for canola breeding. In this study, canola near-isogenic lines with different oil contents (F338 (40.62%) and F335 (46.68%) as the control) and heavy metal tolerances were used as raw materials. In an experiment with 100 times the safe standard values, the superoxide dismutase (SOD) and peroxidase (POD) activities of F335 were 32.02 mmol/mg and 71.84 mmol/mg, while the activities of F338 were 24.85 mmol/mg and 63.86 mmol/mg, exhibiting significant differences. The DEGs and DAPs in the MAPK signaling pathway of the plant hormone signal transduction pathway and other related pathways were analyzed and verified using RT-qPCR. SAUR36 and SAUR32 were identified as the key differential genes. The expression of the SAUR36 gene in canola materials planted in the experimental field was significantly higher than in the control, and FY958 exhibited the largest difference (27.82 times). In this study, SOD and SAUR36 were found to be closely related to heavy metal stress tolerance. Therefore, they may be used to screen for new canola materials with good heavy metal stress tolerance for canola breeding.
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Affiliation(s)
- Yue Dai
- College of Agriculture, Agricultural University of Hunan, 1 Agricultural Road, Changsha 410128, China; (Y.D.); (H.C.)
| | - Hao Chen
- College of Agriculture, Agricultural University of Hunan, 1 Agricultural Road, Changsha 410128, China; (Y.D.); (H.C.)
| | - Yufang Li
- Hunan Cotton Science Institute, No. 3036 Shanjuan Road, Changde 415101, China;
| | - Rongkui Hui
- Hunan Province Institute of Agricultural Science, South of Hongyuan East Road, Changsha 410125, China
| | - Zhenqian Zhang
- College of Agriculture, Agricultural University of Hunan, 1 Agricultural Road, Changsha 410128, China; (Y.D.); (H.C.)
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4
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Zhou C, Bo W, El-Kassaby YA, Li W. Transcriptome profiles reveal response mechanisms and key role of PsNAC1 in Pinus sylvestris var. mongolica to drought stress. BMC PLANT BIOLOGY 2024; 24:343. [PMID: 38671396 PMCID: PMC11046967 DOI: 10.1186/s12870-024-05051-2] [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: 08/15/2023] [Accepted: 04/19/2024] [Indexed: 04/28/2024]
Abstract
BACKGROUND Drought stress severely impedes plant growth, and only a limited number of species exhibit long-term resistance to such conditions. Pinus sylvestris var. mongolica, a dominant tree species in arid and semi-arid regions of China, exhibits strong drought resistance and plays a crucial role in the local ecosystem. However, the molecular mechanisms underlying this resistance remain poorly understood. RESULTS Here, we conducted transcriptome sequence and physiological indicators analysis of needle samples during drought treatment and rehydration stages. De-novo assembly yielded approximately 114,152 unigenes with an N50 length of 1,363 bp. We identified 6,506 differentially expressed genes (DEGs), with the majority being concentrated in the heavy drought stage (4,529 DEGs). Functional annotation revealed enrichment of drought-related GO terms such as response to water (GO:0009415: enriched 108 genes) and response to water deprivation (GO:0009414: enriched 106 genes), as well as KEGG categories including MAPK signaling pathway (K04733: enriched 35 genes) and monoterpenoid biosynthesis (K21374: enriched 27 genes). Multiple transcription factor families and functional protein families were differentially expressed during drought treatment. Co-expression network analysis identified a potential drought regulatory network between cytochrome P450 genes (Unigene4122_c1_g1) and a core regulatory transcription factor Unigene9098_c3_g1 (PsNAC1) with highly significant expression differences. We validated PsNAC1 overexpression in Arabidopsis and demonstrated enhanced drought resistance. CONCLUSIONS These findings provide insight into the molecular basis of drought resistance in P. sylvestris var. mongolica and lay the foundation for further exploration of its regulatory network.
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Affiliation(s)
- Chengcheng Zhou
- State Key Laboratory of Tree Genetics and Breeding, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Wenhao Bo
- State Key Laboratory of Tree Genetics and Breeding, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Yousry A El-Kassaby
- Department of Forest and Conservation Sciences, Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Wei Li
- State Key Laboratory of Tree Genetics and Breeding, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China.
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5
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Sun L, Xu H, Song J, Yang X, Wang X, Liu H, Pang M, Hu Y, Yang Q, Ning X, Liang S, Zhang S, Luan W. OsNAC103, a NAC Transcription Factor, Positively Regulates Leaf Senescence and Plant Architecture in Rice. RICE (NEW YORK, N.Y.) 2024; 17:15. [PMID: 38358523 PMCID: PMC10869678 DOI: 10.1186/s12284-024-00690-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 02/03/2024] [Indexed: 02/16/2024]
Abstract
Leaf senescence, the last stage of leaf development, is essential for crop yield by promoting nutrition relocation from senescence leaves to new leaves and seeds. NAC (NAM/ATAF1/ATAF2/CUC2) proteins, one of the plant-specific transcription factors, widely distribute in plants and play important roles in plant growth and development. Here, we identified a new NAC member OsNAC103 and found that it plays critical roles in leaf senescence and plant architecture in rice. OsNAC103 mRNA levels were dramatically induced by leaf senescence as well as different phytohormones such as ABA, MeJA and ACC and abiotic stresses including dark, drought and high salinity. OsNAC103 acts as a transcription factor with nuclear localization signals at the N terminal and a transcriptional activation signal at the C terminal. Overexpression of OsNAC103 promoted leaf senescence while osnac103 mutants delayed leaf senescence under natural condition and dark-induced condition, meanwhile, senescence-associated genes (SAGs) were up-regulated in OsNAC103 overexpression (OsNAC103-OE) lines, indicating that OsNAC103 positively regulates leaf senescence in rice. Moreover, OsNAC103-OE lines exhibited loose plant architecture with larger tiller angles while tiller angles of osnac103 mutants decreased during the vegetative and reproductive growth stages due to the response of shoot gravitropism, suggesting that OsNAC103 can regulate the plant architecture in rice. Taken together, our results reveal that OsNAC103 plays crucial roles in the regulation of leaf senescence and plant architecture in rice.
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Affiliation(s)
- Lina Sun
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Hanqin Xu
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Juan Song
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Xiaoying Yang
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - XinYi Wang
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Haiyan Liu
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Mengzhen Pang
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Youchuan Hu
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Qi Yang
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Xiaotong Ning
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Shanshan Liang
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Siju Zhang
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China
| | - Weijiang Luan
- College of Life Sciences, Tianjin Key Laboratory of Animal and Plant Resistance, Tianjin Normal University, Tianjin, 300387, China.
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6
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Chow CN, Yang CW, Wu NY, Wang HT, Tseng KC, Chiu YH, Lee TY, Chang WC. PlantPAN 4.0: updated database for identifying conserved non-coding sequences and exploring dynamic transcriptional regulation in plant promoters. Nucleic Acids Res 2024; 52:D1569-D1578. [PMID: 37897338 PMCID: PMC10767843 DOI: 10.1093/nar/gkad945] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/07/2023] [Accepted: 10/12/2023] [Indexed: 10/30/2023] Open
Abstract
PlantPAN 4.0 (http://PlantPAN.itps.ncku.edu.tw/) is an integrative resource for constructing transcriptional regulatory networks for diverse plant species. In this release, the gene annotation and promoter sequences were expanded to cover 115 species. PlantPAN 4.0 can help users characterize the evolutionary differences and similarities among cis-regulatory elements; furthermore, this system can now help in identification of conserved non-coding sequences among homologous genes. The updated transcription factor binding site repository contains 3428 nonredundant matrices for 18305 transcription factors; this expansion helps in exploration of combinational and nucleotide variants of cis-regulatory elements in conserved non-coding sequences. Additionally, the genomic landscapes of regulatory factors were manually updated, and ChIP-seq data sets derived from a single-cell green alga (Chlamydomonas reinhardtii) were added. Furthermore, the statistical review and graphical analysis components were improved to offer intelligible information through ChIP-seq data analysis. These improvements included easy-to-read experimental condition clusters, searchable gene-centered interfaces for the identification of promoter regions' binding preferences by considering experimental condition clusters and peak visualization for all regulatory factors, and the 20 most significantly enriched gene ontology functions for regulatory factors. Thus, PlantPAN 4.0 can effectively reconstruct gene regulatory networks and help compare genomic cis-regulatory elements across plant species and experiments.
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Affiliation(s)
- Chi-Nga Chow
- Institute of Tropical Plant Sciences and Microbiology, College of Biosciences and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
- School of Molecular Sciences, Arizona State University, Tempe 85281, USA
| | - Chien-Wen Yang
- Institute of Tropical Plant Sciences and Microbiology, College of Biosciences and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Nai-Yun Wu
- Institute of Tropical Plant Sciences and Microbiology, College of Biosciences and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Hung-Teng Wang
- Institute of Tropical Plant Sciences and Microbiology, College of Biosciences and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Kuan-Chieh Tseng
- Department of Life Sciences, National Cheng Kung University, Tainan 701, Taiwan
| | - Yu-Hsuan Chiu
- Graduate Program in Translational Agricultural Sciences, National Cheng Kung University and Academia Sinica, Tainan 701, Taiwan
| | - Tzong-Yi Lee
- Department of Biological Science & Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Wen-Chi Chang
- Institute of Tropical Plant Sciences and Microbiology, College of Biosciences and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
- Department of Life Sciences, National Cheng Kung University, Tainan 701, Taiwan
- Graduate Program in Translational Agricultural Sciences, National Cheng Kung University and Academia Sinica, Tainan 701, Taiwan
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7
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Wang Y, Gao Y, Cui Y, Lv Y, Zhou J, Zhang Q. Functional characterization of two NAC transcription factors HfNAP1 and HfNAC090 associated with flower programmed cell death in daylily (Hemerocallis fulva). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 337:111872. [PMID: 37729968 DOI: 10.1016/j.plantsci.2023.111872] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 09/22/2023]
Abstract
Daylily (Hemerocallis fulva) is one of the most widely used perennial flowers, but its ornamental and economic value is greatly limited due to its ephemeral flowering period. In general, the flower senescence is regulated by the developmental signals and considered as an irreversible process of programmed cell death (PCD). However, the molecular mechanism of flower PCD in daylily still remains unclear. In this study, two NAC transcription factors, namely HfNAP1 and HfNAC090, are first identified and found to be upregulated significantly in both the age-induced and the ABA-induced flower PCD processes in daylily. Then, the functions of HfNAP1 and HfNAC090 in regulating the flower PCD are investigated through transgenic phenotypes analysis. The results demonstrate that the ectopic and transient overexpression of these two genes can effectively regulate the flower PCD in tobacco and daylily. While the overexpression of HfNAP1 accelerates the flower PCD process, the overexpression of HfNAC090 significantly delays that. Furthermore, the yeast two-hybrid assay is performed to discover potential interactions related to these two genes, and the results demonstrate that HfNAP1 and HfNAC090 can interact with each other, or interact with other flower aging-related genes. Additionally, the yeast one-hybrid assay suggests that HfNAP1 and HfNAC090 can bind directly to the promoters of downstream senescence-associated genes HfSAG39 and HfSAG15. Taken overall, this study provides sufficient evidences to confirm that HfNAP1 and HfNAC090 play dominant roles in regulating the flower PCD in daylily, supporting the development of new strategies to prolong the longevity of daylily flowers.
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Affiliation(s)
- Ying Wang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, School of Landscape Architecture, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, China
| | - Yike Gao
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, School of Landscape Architecture, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, China.
| | - Yuxuan Cui
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, School of Landscape Architecture, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, China
| | - Yi Lv
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, School of Landscape Architecture, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, China
| | - Jing Zhou
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, School of Landscape Architecture, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, China
| | - Qixiang Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, School of Landscape Architecture, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing, China
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8
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Nagahage ISP, Matsuda K, Miyashita K, Fujiwara S, Mannapperuma C, Yamada T, Sakamoto S, Ishikawa T, Nagano M, Ohtani M, Kato K, Uchimiya H, Mitsuda N, Kawai‐Yamada M, Demura T, Yamaguchi M. NAC domain transcription factors VNI2 and ATAF2 form protein complexes and regulate leaf senescence. PLANT DIRECT 2023; 7:e529. [PMID: 37731912 PMCID: PMC10507225 DOI: 10.1002/pld3.529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/17/2023] [Accepted: 08/17/2023] [Indexed: 09/22/2023]
Abstract
The NAM, ATAF1/2, and CUC2 (NAC) domain transcription factor VND-INTERACTING2 (VNI2) negatively regulates xylem vessel formation by interacting with another NAC domain transcription factor, VASCULAR-RELATED NAC-DOMAIN7 (VND7), a master regulator of xylem vessel formation. Here, we screened interacting proteins with VNI2 using yeast two-hybrid assay and isolated two NAC domain transcription factors, Arabidopsis thaliana ACTIVATION FACTOR 2 (ATAF2) and NAC DOMAIN CONTAINING PROTEIN 102 (ANAC102). A transient gene expression assay showed that ATAF2 upregulates the expression of genes involved in leaf senescence, and VNI2 effectively inhibits the transcriptional activation activity of ATAF2. vni2 mutants accelerate leaf senescence, whereas ataf2 mutants delay leaf senescence. In addition, the accelerated leaf senescence phenotype of the vni2 mutant is recovered by simultaneous mutation of ATAF2. Our findings strongly suggest that VNI2 interacts with and inhibits ATAF2, resulting in negatively regulating leaf senescence.
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Affiliation(s)
| | - Kohei Matsuda
- Graduate School of Science and TechnologyNara Institute of Science and TechnologyIkomaJapan
| | - Kyoko Miyashita
- Bioproduction Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
| | - Sumire Fujiwara
- Bioproduction Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
| | - Chanaka Mannapperuma
- Umeå Plant Science Centre, Department of Plant PhysiologyUmeå UniversityUmeåSweden
| | - Takuya Yamada
- Graduate School of Science and EngineeringSaitama UniversitySaitamaJapan
| | - Shingo Sakamoto
- Bioproduction Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
- Global Zero‐Emission Research CenterNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
| | - Toshiki Ishikawa
- Graduate School of Science and EngineeringSaitama UniversitySaitamaJapan
| | - Minoru Nagano
- Graduate School of Science and EngineeringSaitama UniversitySaitamaJapan
- Present address:
College of Life SciencesRitsumeikan UniversityKusatsuJapan
| | - Misato Ohtani
- Graduate School of Science and TechnologyNara Institute of Science and TechnologyIkomaJapan
- Present address:
Department of Integrated Biosciences, Graduate School of Frontier SciencesThe University of TokyoKashiwaJapan
| | - Ko Kato
- Graduate School of Science and TechnologyNara Institute of Science and TechnologyIkomaJapan
| | - Hirofumi Uchimiya
- Institute for Environmental Science and TechnologySaitama UniversitySaitamaJapan
| | - Nobutaka Mitsuda
- Bioproduction Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
- Global Zero‐Emission Research CenterNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
| | - Maki Kawai‐Yamada
- Graduate School of Science and EngineeringSaitama UniversitySaitamaJapan
| | - Taku Demura
- Graduate School of Science and TechnologyNara Institute of Science and TechnologyIkomaJapan
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9
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Tan S, Sha Y, Sun L, Li Z. Abiotic Stress-Induced Leaf Senescence: Regulatory Mechanisms and Application. Int J Mol Sci 2023; 24:11996. [PMID: 37569371 PMCID: PMC10418887 DOI: 10.3390/ijms241511996] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023] Open
Abstract
Leaf senescence is a natural phenomenon that occurs during the aging process of plants and is influenced by various internal and external factors. These factors encompass plant hormones, as well as environmental pressures such as inadequate nutrients, drought, darkness, high salinity, and extreme temperatures. Abiotic stresses accelerate leaf senescence, resulting in reduced photosynthetic efficiency, yield, and quality. Gaining a comprehensive understanding of the molecular mechanisms underlying leaf senescence in response to abiotic stresses is imperative to enhance the resilience and productivity of crops in unfavorable environments. In recent years, substantial advancements have been made in the study of leaf senescence, particularly regarding the identification of pivotal genes and transcription factors involved in this process. Nevertheless, challenges remain, including the necessity for further exploration of the intricate regulatory network governing leaf senescence and the development of effective strategies for manipulating genes in crops. This manuscript provides an overview of the molecular mechanisms that trigger leaf senescence under abiotic stresses, along with strategies to enhance stress tolerance and improve crop yield and quality by delaying leaf senescence. Furthermore, this review also highlighted the challenges associated with leaf senescence research and proposes potential solutions.
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Affiliation(s)
| | | | - Liwei Sun
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Zhonghai Li
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
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10
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Yuan X, Xu J, Yu J, Zhu D, Li H, Zhao Q. The NAC transcription factor ZmNAC132 regulates leaf senescence and male fertility in maize. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023:111774. [PMID: 37331633 DOI: 10.1016/j.plantsci.2023.111774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/20/2023]
Abstract
Leaf senescence is an integral step in the final stages of plant development, as nutrient remobilization from leaves to sink organs is accomplished during this process. NACs compose a large superfamily of plant-specific TFs involved in multiple plant development processes. Here, we identified a maize NAC TF, ZmNAC132, involved in leaf senescence and male fertility. ZmNAC132 expression was tightly linked to leaf senescence in an age-dependent manner. Knockout of ZmNAC132 led to delays in chlorophyll degradation and leaf senescence, whereas overexpression of ZmNAC132 had the opposite effects. ZmNAC132 could bind to and transactivate the promoter of ZmNYE1, a major chlorophyll catabolic gene, to accelerate chlorophyll degradation during leaf senescence. Moreover, ZmNAC132 affected male fertility through the upregulation of ZmEXPB1, an expansin-encoding gene associated with sexual reproduction and other related genes. Together, the results show that ZmNAC132 participates in the regulation of leaf senescence and male fertility through the targeting of different downstream genes in maize.
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Affiliation(s)
- Xiaohong Yuan
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Jianghai Xu
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Jingjuan Yu
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Dengyun Zhu
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Hongjie Li
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, 100193, Beijing, China
| | - Qian Zhao
- State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, 100193, Beijing, China.
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11
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Cao J, Liu H, Tan S, Li Z. Transcription Factors-Regulated Leaf Senescence: Current Knowledge, Challenges and Approaches. Int J Mol Sci 2023; 24:ijms24119245. [PMID: 37298196 DOI: 10.3390/ijms24119245] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/12/2023] [Accepted: 05/14/2023] [Indexed: 06/12/2023] Open
Abstract
Leaf senescence is a complex biological process regulated at multiple levels, including chromatin remodeling, transcription, post-transcription, translation, and post-translational modifications. Transcription factors (TFs) are crucial regulators of leaf senescence, with NAC and WRKY families being the most studied. This review summarizes the progress made in understanding the regulatory roles of these families in leaf senescence in Arabidopsis and various crops such as wheat, maize, sorghum, and rice. Additionally, we review the regulatory functions of other families, such as ERF, bHLH, bZIP, and MYB. Unraveling the mechanisms of leaf senescence regulated by TFs has the potential to improve crop yield and quality through molecular breeding. While significant progress has been made in leaf senescence research in recent years, our understanding of the molecular regulatory mechanisms underlying this process is still incomplete. This review also discusses the challenges and opportunities in leaf senescence research, with suggestions for possible strategies to address them.
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Affiliation(s)
- Jie Cao
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Hairong Liu
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Shuya Tan
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Zhonghai Li
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
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12
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Kopecká R, Kameniarová M, Černý M, Brzobohatý B, Novák J. Abiotic Stress in Crop Production. Int J Mol Sci 2023; 24:ijms24076603. [PMID: 37047573 PMCID: PMC10095105 DOI: 10.3390/ijms24076603] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/23/2023] [Accepted: 03/28/2023] [Indexed: 04/05/2023] Open
Abstract
The vast majority of agricultural land undergoes abiotic stress that can significantly reduce agricultural yields. Understanding the mechanisms of plant defenses against stresses and putting this knowledge into practice is, therefore, an integral part of sustainable agriculture. In this review, we focus on current findings in plant resistance to four cardinal abiotic stressors—drought, heat, salinity, and low temperatures. Apart from the description of the newly discovered mechanisms of signaling and resistance to abiotic stress, this review also focuses on the importance of primary and secondary metabolites, including carbohydrates, amino acids, phenolics, and phytohormones. A meta-analysis of transcriptomic studies concerning the model plant Arabidopsis demonstrates the long-observed phenomenon that abiotic stressors induce different signals and effects at the level of gene expression, but genes whose regulation is similar under most stressors can still be traced. The analysis further reveals the transcriptional modulation of Golgi-targeted proteins in response to heat stress. Our analysis also highlights several genes that are similarly regulated under all stress conditions. These genes support the central role of phytohormones in the abiotic stress response, and the importance of some of these in plant resistance has not yet been studied. Finally, this review provides information about the response to abiotic stress in major European crop plants—wheat, sugar beet, maize, potatoes, barley, sunflowers, grapes, rapeseed, tomatoes, and apples.
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Affiliation(s)
- Romana Kopecká
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 61300 Brno, Czech Republic
| | - Michaela Kameniarová
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 61300 Brno, Czech Republic
| | - Martin Černý
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 61300 Brno, Czech Republic
| | - Břetislav Brzobohatý
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 61300 Brno, Czech Republic
| | - Jan Novák
- Department of Molecular Biology and Radiobiology, Faculty of AgriSciences, Mendel University in Brno, 61300 Brno, Czech Republic
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13
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Baker A, Lin CC, Lett C, Karpinska B, Wright MH, Foyer CH. Catalase: A critical node in the regulation of cell fate. Free Radic Biol Med 2023; 199:56-66. [PMID: 36775107 DOI: 10.1016/j.freeradbiomed.2023.02.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/19/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
Catalase (CAT) is an extensively studied if somewhat enigmatic enzyme that is at the heart of eukaryotic antioxidant systems with a canonical role in peroxisomal function. The CAT family of proteins exert control over a wide range of plant growth and defence processes. CAT proteins are subject to many types of post-translational modification (PTM), which modify activity, ligand binding, stability, compartmentation and function. The CAT interactome involves many cytosolic and nuclear proteins that appear to be essential for protein functions. Hence, the CAT network of roles extends far beyond those associated with peroxisomal metabolism. Some pathogen effector proteins are able to redirect CAT to the nucleus and recent evidence indicates CAT can traffic to the nucleus in the absence of exogenous proteins. While the mechanisms that target CAT to the nucleus are not understood, CAT activity in the cytosol and nucleus is promoted by interactions with nucleoredoxin. Here we discuss recent findings that have been pivotal in generating a step change in our understanding of CAT functions in plant cells.
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Affiliation(s)
- Alison Baker
- Centre for Plant Sciences and School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK; Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.
| | - Chi-Chuan Lin
- Centre for Plant Sciences and School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Casey Lett
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, UK
| | - Barbara Karpinska
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, UK
| | - Megan H Wright
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
| | - Christine H Foyer
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
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14
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Yapa MM, Doroodian P, Gao Z, Yu P, Hua Z. MORF2-mediated plastidial retrograde signaling is involved in stress response and skotomorphogenesis beyond RNA editing. FRONTIERS IN PLANT SCIENCE 2023; 14:1146922. [PMID: 37056496 PMCID: PMC10086144 DOI: 10.3389/fpls.2023.1146922] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
Retrograde signaling modulates the expression of nuclear genome-encoded organelle proteins to adjust organelle function in response to environmental cues. MULTIPLE ORGANELLAR RNA EDITING FACTOR 2 (MORF2) was initially recognized as a plastidial RNA-editing factor but recently shown to interact with GUN1. Given the central role of GUN1 in chloroplast retrograde signaling and the unviable phenotype of morf2 mutants that is inconsistent with many viable mutants involved in RNA editing, we hypothesized that MORF2 has functions either dosage dependent or beyond RNA editing. Using an inducible Clustered Interspaced Short Palindromic Repeat interference (iCRISPRi) approach, we were able to reduce the MORF2 transcripts in a controlled manner. In addition to MORF2-dosage dependent RNA-editing errors, we discovered that reducing MORF2 by iCRISPRi stimulated the expression of stress responsive genes, triggered plastidial retrograde signaling, repressed ethylene signaling and skotomorphogenesis, and increased accumulation of hydrogen peroxide. These findings along with previous discoveries suggest that MORF2 is an effective regulator involved in plastidial metabolic pathways whose reduction can readily activate multiple retrograde signaling molecules possibly involving reactive oxygen species to adjust plant growth. In addition, our newly developed iCRISPRi approach provided a novel genetic tool for quantitative reverse genetics studies on hub genes in plants.
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Affiliation(s)
- Madhura M. Yapa
- Environmental and Plant Biology Department, Ohio University, Athens, OH, United States
| | - Paymon Doroodian
- Environmental and Plant Biology Department, Ohio University, Athens, OH, United States
- Interdisciplinary Program in Molecular and Cellular Biology, Ohio University, Athens, OH, United States
| | - Zhenyu Gao
- Environmental and Plant Biology Department, Ohio University, Athens, OH, United States
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou, Zhejiang, China
| | - Peifeng Yu
- Environmental and Plant Biology Department, Ohio University, Athens, OH, United States
- Interdisciplinary Program in Molecular and Cellular Biology, Ohio University, Athens, OH, United States
| | - Zhihua Hua
- Environmental and Plant Biology Department, Ohio University, Athens, OH, United States
- Interdisciplinary Program in Molecular and Cellular Biology, Ohio University, Athens, OH, United States
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15
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Sun L, Zhang P, Xing M, Li R, Yu H, Ju Q, Yang J, Xu J. NAC32 alleviates magnesium toxicity-induced cell death through positive regulation of XIPOTL1 expression. PLANT PHYSIOLOGY 2023; 191:849-853. [PMID: 36477811 PMCID: PMC9922428 DOI: 10.1093/plphys/kiac562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
Abscisic acid–inducible NAC32 alleviates magnesium toxicity-mediated cell death in roots through direct regulation of XIPOTL1 expression in Arabidopsis.
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Affiliation(s)
| | | | | | | | | | | | | | - Jin Xu
- Author for correspondence:
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16
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Li S, Liu S, Zhang Q, Cui M, Zhao M, Li N, Wang S, Wu R, Zhang L, Cao Y, Wang L. The interaction of ABA and ROS in plant growth and stress resistances. FRONTIERS IN PLANT SCIENCE 2022; 13:1050132. [PMID: 36507454 PMCID: PMC9729957 DOI: 10.3389/fpls.2022.1050132] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/08/2022] [Indexed: 05/31/2023]
Abstract
The plant hormone ABA (abscisic acid) plays an extremely important role in plant growth and adaptive stress, including but are not limited to seed germination, stomatal closure, pathogen infection, drought and cold stresses. Reactive oxygen species (ROS) are response molecules widely produced by plant cells under biotic and abiotic stress conditions. The production of apoplast ROS is induced and regulated by ABA, and participates in the ABA signaling pathway and its regulated plant immune system. In this review, we summarize ABA and ROS in apoplast ROS production, plant response to biotic and abiotic stresses, plant growth regulation, ABA signal transduction, and the regulatory relationship between ABA and other plant hormones. In addition, we also discuss the effects of protein post-translational modifications on ABA and ROS related factors.
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Affiliation(s)
- Shenghui Li
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Sha Liu
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Qiong Zhang
- Institute of Pomology, Shandong Academy of Agricultural Sciences, Tai’an, China
| | - Meixiang Cui
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Min Zhao
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Nanyang Li
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Suna Wang
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Ruigang Wu
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
| | - Lin Zhang
- School of Basic Medical Sciences, Hubei University of Chinese Medicine, Wuhan, China
| | - Yunpeng Cao
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Lihu Wang
- School of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, China
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17
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Liu M, Guo C, Xie K, Chen K, Chen J, Wang Y, Wang X. A cross-species co-functional gene network underlying leaf senescence. HORTICULTURE RESEARCH 2022; 10:uhac251. [PMID: 36643763 PMCID: PMC9832971 DOI: 10.1093/hr/uhac251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 11/08/2022] [Indexed: 06/17/2023]
Abstract
The complex leaf senescence process is governed by various levels of transcriptional and translational regulation. Several features of the leaf senescence process are similar across species, yet the extent to which the molecular mechanisms underlying the process of leaf senescence are conserved remains unclear. Currently used experimental approaches permit the identification of individual pathways that regulate various physiological and biochemical processes; however, the large-scale regulatory network underpinning intricate processes like leaf senescence cannot be built using these methods. Here, we discovered a series of conserved genes involved in leaf senescence in a common horticultural crop (Solanum lycopersicum), a monocot plant (Oryza sativa), and a eudicot plant (Arabidopsis thaliana) through analyses of the evolutionary relationships and expression patterns among genes. Our analyses revealed that the genetic basis of leaf senescence is largely conserved across species. We also created a multi-omics workflow using data from more than 10 000 samples from 85 projects and constructed a leaf senescence-associated co-functional gene network with 2769 conserved, high-confidence functions. Furthermore, we found that the mitochondrial unfolded protein response (UPRmt) is the central biological process underlying leaf senescence. Specifically, UPRmt responds to leaf senescence by maintaining mitostasis through a few cross-species conserved transcription factors (e.g. NAC13) and metabolites (e.g. ornithine). The co-functional network built in our study indicates that UPRmt figures prominently in cross-species conserved mechanisms. Generally, the results of our study provide new insights that will aid future studies of leaf senescence.
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Affiliation(s)
- Moyang Liu
- Shanghai Collaborative Innovation Center of Agri-Seeds/School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chaocheng Guo
- Shanghai Collaborative Innovation Center of Agri-Seeds/School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Kexuan Xie
- Shanghai Collaborative Innovation Center of Agri-Seeds/School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Kai Chen
- Shanghai Collaborative Innovation Center of Agri-Seeds/School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiahao Chen
- Shanghai Collaborative Innovation Center of Agri-Seeds/School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - Xu Wang
- Corresponding author. E-mail: ,
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18
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Grünhofer P, Stöcker T, Guo Y, Li R, Lin J, Ranathunge K, Schoof H, Schreiber L. Populus × canescens root suberization in reaction to osmotic and salt stress is limited to the developing younger root tip region. PHYSIOLOGIA PLANTARUM 2022; 174:e13765. [PMID: 36281836 DOI: 10.1111/ppl.13765] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/05/2022] [Accepted: 08/12/2022] [Indexed: 06/16/2023]
Abstract
Populus is a valuable and fast-growing tree species commonly cultivated for economic and scientific purposes. But most of the poplar species are sensitive to drought and salt stress. Thus, we compared the physiological effects of osmotic stress (PEG8000) and salt treatment (NaCl) on poplar roots to identify potential strategies for future breeding or genetic engineering approaches. We investigated root anatomy using epifluorescence microscopy, changes in root suberin composition and amount using gas chromatography, transcriptional reprogramming using RNA sequencing, and modifications of root transport physiology using a pressure chamber. Poplar roots reacted to the imposed stress conditions, especially in the developing younger root tip region, with remarkable differences between both types of stress. Overall, the increase in suberin content was surprisingly small, but the expression of key suberin biosynthesis genes was strongly induced. Significant reductions of the radial water transport in roots were only observed for the osmotic and not the hydrostatic hydraulic conductivity. Our data indicate that the genetic enhancement of root suberization processes in poplar might be a promising target to convey increased tolerance, especially against toxic sodium chloride.
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Affiliation(s)
- Paul Grünhofer
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, Germany
| | - Tyll Stöcker
- Department of Crop Bioinformatics, Institute of Crop Science and Resource Conservation, University of Bonn, Bonn, Germany
| | - Yayu Guo
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- College of Biological Science and Technology, Beijing Forestry University, Beijing, China
- Institute of Tree Development and Genome Editing, Beijing Forestry University, Beijing, China
| | - Ruili Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- College of Biological Science and Technology, Beijing Forestry University, Beijing, China
- Institute of Tree Development and Genome Editing, Beijing Forestry University, Beijing, China
| | - Jinxing Lin
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- College of Biological Science and Technology, Beijing Forestry University, Beijing, China
- Institute of Tree Development and Genome Editing, Beijing Forestry University, Beijing, China
| | - Kosala Ranathunge
- UWA School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Heiko Schoof
- Department of Crop Bioinformatics, Institute of Crop Science and Resource Conservation, University of Bonn, Bonn, Germany
| | - Lukas Schreiber
- Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Bonn, Germany
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19
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Analysis of the NAC Gene Family in Salix and the Identification of SpsNAC005 Gene Contributing to Salt and Drought Tolerance. FORESTS 2022. [DOI: 10.3390/f13070971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
The NAC gene family is of great value for plant stress resistance and development. In this study, five NAC genes with a typical NAM domain were isolated from Salix psammophila, which is a stress-resistant willow endemic to western China. Two hundred sixty-two NAC genes from Salix psammophila, Salix purpurea, and Arabidopsis were used to construct the phylogenetic tree to examine the phylogenetic relationship. Five NAC genes in Salix psammophila were the focus of bioinformatics analysis and conserved structural domain analysis. The SpsNAC005 gene was overexpressed in Populus hopeiensis, and the transgenic lines were subjected to salt and simulated drought stress to analyze their phenotype changes and tolerance to stress. The results showed that transgenic poplar height and leaf area increased by 29.73% and 76.36%, respectively, compared with those of wild-type plants. Under stress treatment, the height growth rates and ground diameter growth rates of the transgenic lines were significantly higher than those of the wild-type, whereas their fresh weight and dry weight were decreased compared to those of the wild-type. The SOD activities, POD activities, and Pro contents of the transgenic plants were significantly increased, and the accumulation of MDA was significantly lower than that in the wild-type, and the transgenic lines showed clear tolerance to salt and drought. The expressions of the SOS1, MPK6, HKT1, and P5CS1 genes were downregulated in the transgenic lines. The expression of the PRODH1 gene was downregulated in the transgenic lines. These results indicate that overexpression of the SpsNAC005 gene in transgenic plants can promote plant growth and development and improve tolerance to salt and drought.
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20
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Mahmood K, Torres-Jerez I, Krom N, Liu W, Udvardi MK. Transcriptional Programs and Regulators Underlying Age-Dependent and Dark-Induced Senescence in Medicago truncatula. Cells 2022; 11:cells11091570. [PMID: 35563875 PMCID: PMC9103780 DOI: 10.3390/cells11091570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/19/2022] [Accepted: 04/19/2022] [Indexed: 12/10/2022] Open
Abstract
In forage crops, age-dependent and stress-induced senescence reduces forage yield and quality. Therefore, delaying leaf senescence may be a way to improve forage yield and quality as well as plant resilience to stresses. Here, we used RNA-sequencing to determine the molecular bases of age-dependent and dark-induced leaf senescence in Medicago truncatula. We identified 6845 differentially expressed genes (DEGs) in M3 leaves associated with age-dependent leaf senescence. An even larger number (14219) of DEGs were associated with dark-induced senescence. Upregulated genes identified during age-dependent and dark-induced senescence were over-represented in oxidation–reduction processes and amino acid, carboxylic acid and chlorophyll catabolic processes. Dark-specific upregulated genes also over-represented autophagy, senescence and cell death. Mitochondrial functions were strongly inhibited by dark-treatment while these remained active during age-dependent senescence. Additionally, 391 DE transcription factors (TFs) belonging to various TF families were identified, including a core set of 74 TFs during age-dependent senescence while 759 DE TFs including a core set of 338 TFs were identified during dark-induced senescence. The heterologous expression of several senescence-induced TFs belonging to NAC, WKRY, bZIP, MYB and HD-zip TF families promoted senescence in tobacco leaves. This study revealed the dynamics of transcriptomic responses to age- and dark-induced senescence in M. truncatula and identified senescence-associated TFs that are attractive targets for future work to control senescence in forage legumes.
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Affiliation(s)
- Kashif Mahmood
- Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK 73401, USA; (K.M.); (I.T.-J.); (N.K.); (W.L.)
- Noble Research Institute, L.L.C., Ardmore, OK 73401, USA
| | - Ivone Torres-Jerez
- Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK 73401, USA; (K.M.); (I.T.-J.); (N.K.); (W.L.)
- Noble Research Institute, L.L.C., Ardmore, OK 73401, USA
| | - Nick Krom
- Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK 73401, USA; (K.M.); (I.T.-J.); (N.K.); (W.L.)
| | - Wei Liu
- Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK 73401, USA; (K.M.); (I.T.-J.); (N.K.); (W.L.)
- Department of Biological Sciences, BioDiscovery Institute, University of North Texas, Denton, TX 76201, USA
| | - Michael K. Udvardi
- Noble Research Institute, L.L.C., Ardmore, OK 73401, USA
- Centre for Crop Science, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
- Correspondence:
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21
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Wei J, Liu D, Liu Y, Wei S. Physiological Analysis and Transcriptome Sequencing Reveal the Effects of Salt Stress on Banana ( Musa acuminata cv. BD) Leaf. FRONTIERS IN PLANT SCIENCE 2022; 13:822838. [PMID: 35498665 PMCID: PMC9039761 DOI: 10.3389/fpls.2022.822838] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
The salinization of soil is a widespread environmental problem. Banana (Musa acuminata L.) is a salt-sensitive plant whose growth, development, and production are constrained by salt stresses. However, the tolerance mechanism of this salt-sensitive banana to salt stress is still unclear. This study aimed to investigate the influence of NaCl treatment on phenotypic, physiological, and transcriptome changes in bananas. We found that the content of root activity, MDA, Pro, soluble sugar, soluble protein, and antioxidant enzymes activity in salt-stress treatment were significantly higher than the control in bananas. Transcriptome sequencing result identified an overall of 3,378 differentially expressed genes (DEGs) in banana leaves, and the Kyoto Encyclopedia of Genes and Genomes analysis indicated that these DEGs were involved in phenylpropanoid biosynthesis process, ribosome process, starch and sucrose metabolism, amino sugar process, and plant hormone signal transduction process that had simultaneously changed their expression under salt stress, which indicated these DEGs may play a role in promoting BD banana growth under salt treatments. The genes which were enriched in the phenylpropanoid biosynthesis process, starch and sucrose metabolism process, amino sugar process, and plant hormone signal transduction process were specifically regulated to respond to the salt stress treatments. Here, totally 48 differentially expressed transcription factors (TFs), including WRKY, MYB, NAC, and bHLH, were annotated in BD banana under salt stress. In the phenylpropane biosynthesis pathway, all transcripts encoding key enzymes were found to be significantly up-regulated, indicating that the genes in these pathways may play a significant function in the response of BD banana to salt stress. In conclusion, this study provides new insights into the mechanism of banana tolerance to salt stress, which provides a potential application for the genetic improvement of banana with salt tolerance.
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Affiliation(s)
- Junya Wei
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Debing Liu
- Applied Science and Technology College, Hainan University, Haikou, China
| | - Yuewei Liu
- Applied Science and Technology College, Hainan University, Haikou, China
| | - Shouxing Wei
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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Matias F, Novais de Oliveira P, Gómez-Espinoza O, Galeano E, Carrer H. Overexpression of the Tectona grandis TgNAC01 regulates growth, leaf senescence and confer salt stress tolerance in transgenic tobacco plants. PeerJ 2022; 10:e13039. [PMID: 35261823 PMCID: PMC8898551 DOI: 10.7717/peerj.13039] [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: 09/20/2021] [Accepted: 02/09/2022] [Indexed: 01/11/2023] Open
Abstract
NAC transcription factors play critical roles in xylem secondary development and in regulation of stress response in plants. NAC proteins related to secondary cell wall development were recently identified and characterized in Tectona grandis (teak), one of the hardwood trees of highest economic importance in the world. In this work, we characterized the novel TgNAC01 gene, which is involved in signaling pathways that mediate teak response to stress. Abscisic acid (ABA) increases TgNAC01 expression in teak plants. Therefore, this gene may have a role in signaling events that mediate ABA-dependent osmotic stress responsive in this plant species. Stable expression in tobacco plants showed that the TgNAC01 protein is localized in the cell nucleus. Overexpression of TgNAC01 in two out three independent transgenic tobacco lines resulted in increased growth, leaf senescence and salt tolerance compared to wild type (WT) plants. Moreover, the stress tolerance of transgenic plants was affected by levels of TgNAC01 gene expression. Water potential, gas exchange and chlorophyll fluorescence were used to determine salt stress tolerance. The 35S:TgNAC01-6 line under 300 mM NaCl stress responded with a significant increase in photosynthesis rate, stomatal conductance, transpiration and carboxylation efficiency, but lower water potential compared to WT plants. The data indicate that the TgNAC01 transcription factor acts as a transcriptional activator of the ABA-mediated regulation and induces leaf senescence.
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Affiliation(s)
- Fernando Matias
- Department of Biological Sciences, Luiz de Queiroz College of Agriculture (ESALQ), Universidade de São Paulo, Piracicaba, São Paulo, Brasil
| | - Perla Novais de Oliveira
- Department of Biological Sciences, Luiz de Queiroz College of Agriculture (ESALQ), Universidade de São Paulo, Piracicaba, São Paulo, Brasil
| | - Olman Gómez-Espinoza
- Laboratory of Physiology and Plant Molecular Biology, Agroindustry Institute, Universidad de La Frontera, Temuco, Chile
| | - Esteban Galeano
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada
| | - Helaine Carrer
- Department of Biological Sciences, Luiz de Queiroz College of Agriculture (ESALQ), Universidade de São Paulo, Piracicaba, São Paulo, Brasil
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Overexpression of Liriodendron tulipifera JAG Gene (LtuJAG) Changes Leaf Shapes in Transgenic Arabidopsis thaliana. Int J Mol Sci 2022; 23:ijms23031322. [PMID: 35163246 PMCID: PMC8836172 DOI: 10.3390/ijms23031322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/20/2022] [Accepted: 01/20/2022] [Indexed: 11/16/2022] Open
Abstract
In Arabidopsis thaliana, JAGGED (JAG) is a transcription inhibitor that controls the development of leaf polarity and regulates the expression of genes controlling lateral organ formation. Liriodendron tulipifera is an ornamental tree with extraordinary tulip-shaped flowers and goose web-like leaves, this is one of the suitable plants for morphological development research. To investigate the potential functions of the LtuJAG gene, we isolated the full-length LtuJAG from L. tulipifera, transferred it into A. thaliana via agrobacterium-mediated transformation, and monitored its expression pattern. Subcellular localization showed that LtuJAG was located in the nucleus. RT-qPCR assays indicated that LtuJAG was expressed mainly in leaf buds and flowers, but not in mature leaves and stems. GUS staining results showed that LtuJAG was expressed in the shoot apical meristem (SAM). Overexpressing LtuJAG changed A. thaliana leaf shapes, causing a moderate serration and a slight asymmetric distribution in the medio-lateral and proximal-distal axes. Ectopic expression of LtuJAG induced the expression of lateral organ boundary suppressors JAGGED LATERAL ORGANS (JLO) and ARABIDOPSIS THALIANA HOMEOBOX1 (ATH1). It also repressed the expression of the apical meristem suppressor class-1 KNOX gene (KNOX I) and altered endogenous hormone levels. Our results suggest that LtuJAG plays a role in negatively regulating leaf polarity formation in L. tulipifera.
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Bhakta S, Negi S, Tak H, Singh S, Ganapathi TR. MusaATAF2 like protein, a stress-related transcription factor, induces leaf senescence by regulating chlorophyll catabolism and H 2 O 2 accumulation. PHYSIOLOGIA PLANTARUM 2022; 174:e13593. [PMID: 34761415 DOI: 10.1111/ppl.13593] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 09/09/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
NAC transcription factors are known for their diverse role in plants. In this study, we have demonstrated the role of MusaATAF2, a banana NAC transcription factor, in leaf senescence. Its expression gets strongly up-regulated during the early stress responses of drought and high salinity exposure and down-regulated under ABA application, which suggests MusaATAF2 is a stress-related NAC transcription factor. To study the role of MusaATAF2 in banana, we have transformed the banana embryogenic cells with MusaATAF2 coding region and generated transgenic banana plants. Overexpression of MusaATAF2 in banana plants caused yellow leaf phenotype under control condition, suggesting its role as a senescence-associated transcription factor. Transgenic banana leaves exhibited low chlorophyll content and high H2 O2 accumulation. Hormone analysis of the leaves demonstrated a higher accumulation of ABA in the transgenic plants than the controls. Transgenic plants overexpressing MusaATAF2 have a higher transcript abundance of two chlorophyll catabolic pathway genes (PAO and HCAR) and lower transcript abundance of ROS scavenging enzymes (TDP, THIO, CAT, APX, and PRXDN) than control. Together, all these analyses indicate that MusaATAF2 induces senescence by inducing chlorophyll degradation and H2 O2 accumulation in banana plants and controls its own expression using an ABA-dependent feedback loop.
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Affiliation(s)
- Subham Bhakta
- Plant Cell Culture Technology Section, Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
| | - Sanjana Negi
- Department of Biotechnology, University of Mumbai, Mumbai, India
| | - Himanshu Tak
- Plant Cell Culture Technology Section, Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
| | - Sudhir Singh
- Homi Bhabha National Institute, Mumbai, India
- Plant Biotechnology & Secondary Metabolites Section, Nuclear Agriculture & Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Thumbali R Ganapathi
- Plant Cell Culture Technology Section, Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
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25
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Wei J, Liang J, Liu D, Liu Y, Liu G, Wei S. Melatonin-induced physiology and transcriptome changes in banana seedlings under salt stress conditions. FRONTIERS IN PLANT SCIENCE 2022; 13:938262. [PMID: 36147243 PMCID: PMC9485729 DOI: 10.3389/fpls.2022.938262] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 07/05/2022] [Indexed: 05/17/2023]
Abstract
Soil salinization poses a serious threat to the ecological environment and agricultural production and is one of the most common abiotic stresses in global agricultural production. As a salt-sensitive plant, the growth, development, and production of bananas (Musa acuminata L.) are restricted by salt stress. Melatonin is known to improve the resistance of plants to stress. The study analyzed the effects of 100 μM melatonin on physiological and transcriptome changes in banana varieties (AAA group cv. Cavendish) under 60 mmol/l of NaCl salt stress situation. The phenotypic results showed that the application of exogenous melatonin could maintain banana plants' health growth and alleviate the damage caused by salt stress. The physiological data show that the application of exogenous melatonin can enhance salt tolerance of banana seedlings by increasing the content of proline content and soluble protein, slowing down the degradation of chlorophyll, reducing membrane permeability and recovery of relative water content, increasing the accumulation of MDA, and enhancing antioxidant defense activity. Transcriptome sequencing showed that melatonin-induced salt tolerance of banana seedlings involved biological processes, molecular functions, and cellular components. We also found that differentially expressed genes (DEGs) are involved in a variety of metabolic pathways, including amino sugar and nucleotide sugar metabolism, phenylalanine metabolism, cyanoamino acid metabolism, starch and sucrose metabolism, and linoleic acid metabolism. These major metabolism and biosynthesis may be involved in the potential mechanism of melatonin under salt stress. Furthermore, some members of the transcription factor family, such as MYB, NAC, bHLH, and WRKY, might contribute to melatonin alleviating salt stress tolerance of the banana plant. The result laid a basis for further clarifying the salt stress resistance mechanism of bananas mediated by exogenous melatonin and provides theoretical bases to utilize melatonin to improve banana salt tolerance in the future.
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Affiliation(s)
- Junya Wei
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Jinhao Liang
- Applied Science and Technology College, Hainan University, Haikou, China
| | - Debing Liu
- Applied Science and Technology College, Hainan University, Haikou, China
- *Correspondence: Debing Liu,
| | - Yuewei Liu
- Applied Science and Technology College, Hainan University, Haikou, China
| | - Guoyin Liu
- Forestry College, Hainan University, Haikou, China
- Guoyin Liu,
| | - Shouxing Wei
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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Zu X, Lu Y, Wang Q, La Y, Hong X, Tan F, Niu J, Xia H, Wu Y, Zhou S, Li K, Chen H, Qiang S, Rui Q, Wang H, La H. Increased Drought Resistance 1 Mutation Increases Drought Tolerance of Upland Rice by Altering Physiological and Morphological Traits and Limiting ROS Levels. PLANT & CELL PHYSIOLOGY 2021; 62:1168-1184. [PMID: 33836080 DOI: 10.1093/pcp/pcab053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/29/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
To discover new mutants conferring enhanced tolerance to drought stress, we screened a mutagenized upland rice (Oryza sativa) population (cv. IAPAR9) and identified a mutant, named idr1-1 (increased drought resistance 1-1), with obviously increased drought tolerance under upland field conditions. The idr1-1 mutant possessed a significantly enhanced ability to tolerate high-drought stresses. Map-based cloning revealed that the gene LOC_Os05g26890, residing in the mapping region of IDR1 locus, carried a single-base deletion in the idr1-1 mutant. IDR1 encodes the Gα subunit of the heterotrimeric G protein (also known as RGA1), and this protein was localized in nucleus and to plasma membrane or cell periphery. Further investigations indicated that the significantly increased drought tolerance in idr1-1 mutants stemmed from a range of physiological and morphological changes, including greater leaf potentials, increased proline contents, heightened leaf thickness and upregulation of antioxidant-synthesizing and drought-induced genes, under drought-stressed conditions. Especially, reactive oxygen species (ROS) production might be remarkably impaired, while ROS-scavenging ability appeared to be markedly enhanced due to significantly elevated expression of ROS-scavenging enzyme genes in idr1-1 mutants under drought-stressed conditions. In addition, idr1-1 mutants showed reduced expression of OsBRD1. Altogether, these results suggest that mutation of IDR1 leads to alterations in multiple layers of regulations, which ultimately leads to changes in the physiological and morphological traits and limiting of ROS levels, and thereby confers obviously increased drought tolerance to the idr1-1 mutant.
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Affiliation(s)
- Xiaofeng Zu
- Department of Plant Genetics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Yanke Lu
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Qianqian Wang
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Yumei La
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Xinyue Hong
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Feng Tan
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Jiayu Niu
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Huihui Xia
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Yufeng Wu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Bioinformatics Center, Nanjing Agricultural University, Nanjing 210095, China
| | - Shaoxia Zhou
- College of Plant Protection, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Kun Li
- State Key Laboratory of Cotton Biology, Henan Joint International Laboratory for Crop Multi-Omics Research, Henan University, Kaifeng 475004, China
| | - Huhui Chen
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Sheng Qiang
- 6Weed Research Laboratory, Nanjing Agricultural University,Nanjing, Jiangsu 210095China
| | - Qi Rui
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Huaqi Wang
- Department of Plant Genetics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Honggui La
- Department of Biochemistry and Molecular biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
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27
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Morcillo F, Serret J, Beckers A, Collin M, Tisné S, George S, Poveda R, Louise C, Tranbarger TJ. A Non-Shedding Fruit Elaeis oleifera Palm Reveals Perturbations to Hormone Signaling, ROS Homeostasis, and Hemicellulose Metabolism. Genes (Basel) 2021; 12:1724. [PMID: 34828330 PMCID: PMC8621672 DOI: 10.3390/genes12111724] [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: 09/28/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
The developmentally programmed loss of a plant organ is called abscission. This process is characterized by the ultimate separation of adjacent cells in the abscission zone (AZ). The discovery of an American oil palm (Elaeis oleifera) variant that does not shed its has allowed for the study of the mechanisms of ripe fruit abscission in this species. A comparative transcriptome analysis was performed to compare the fruit AZs of the non-shedding E. oleifera variant to an individual of the same progeny that sheds its ripe fruit normally. The study provides evidence for widespread perturbation to gene expression in the AZ of the non-shedding variant, compared to the normal fruit-shedding control, and offers insight into abscission-related functions. Beyond the genes with known or suspected roles during organ abscission or indehiscence that were identified, a list of genes with hormone-related functions, including ethylene, jasmonic acid, abscisic acid, cytokinin and salicylic acid, in addition to reactive oxygen species (ROS) metabolism, transcriptional responses and signaling pathways, was compiled. The results also allowed a comparison between the ripe fruit abscission processes of the African and American oil palm species at the molecular level and revealed commonalities with environmental stress pathways.
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Affiliation(s)
- Fabienne Morcillo
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
- CIRAD, UMR (Unité Mixte de Recherche) DIADE, 34398 Montpellier, France
| | - Julien Serret
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Antoine Beckers
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Myriam Collin
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Sebastien Tisné
- CIRAD, UMR AGAP (Amélioration Génétique et Adaptation des Plantes Méditerranéennes et Tropicales), 34398 Montpellier, France;
- AGAP, University of Montpellier, CIRAD, INRAE (Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement), Institut Agro, 34398 Montpellier, France
| | - Simon George
- MGX-Montpellier GenomiX, University of Montpellier, CNRS (Centre National de la Recherche Scientifique), INSERM (Institut National de la Santé et de la Recherche Médicale), 34094 Montpellier, France;
| | - Roberto Poveda
- DANEC, Sangolqui/Rumiñahui, Sangolquí, Pichincha 171102, Ecuador;
| | | | - Timothy John Tranbarger
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
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28
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Yu Y, Qi Y, Xu J, Dai X, Chen J, Dong CH, Xiang F. Arabidopsis WRKY71 regulates ethylene-mediated leaf senescence by directly activating EIN2, ORE1 and ACS2 genes. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 107:1819-1836. [PMID: 34296474 DOI: 10.1111/tpj.15433] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 07/15/2021] [Accepted: 07/16/2021] [Indexed: 05/13/2023]
Abstract
Leaf senescence is a pivotal step in the last stage of the plant life cycle and is influenced by various external and endogenous cues. A series of reports have indicated the involvement of the WRKY transcription factors in regulating leaf senescence, but the molecular mechanisms and signaling pathways remain largely unclear. Here we provide evidence demonstrating that WRKY71 acts as a positive regulator of leaf senescence in Arabidopsis. WRKY71-1D, an overexpressor of WRKY71, exhibited early leaf senescence, while wrky71-1, the WRKY71 loss-of-function mutant, displayed delayed leaf senescence. Accordingly, a set of senescence-associated genes (SAGs) were substantially elevated in WRKY71-1D but markedly decreased in wrky71-1. Chromatin immunoprecipitation assays indicated that WRKY71 can bind directly to the promoters of SAG13 and SAG201. Transcriptome analysis suggested that WRKY71 might mediate multiple cues to accelerate leaf senescence, such as abiotic stresses, dark and ethylene. WRKY71 was ethylene inducible, and treatment with the ethylene precursor 1-amino-cyclopropane-1-carboxylic acid enhanced leaf senescence in WRKY71-1D but caused only a marginal delay in leaf senescence in wrky71-1. In vitro and in vivo assays demonstrated that WRKY71 can directly regulate ETHYLENE INSENSITIVE2 (EIN2) and ORESARA1 (ORE1), genes of the ethylene signaling pathway. Consistently, leaf senescence of WRKY71-1D was obviously retarded in the ein2-5 and nac2-1 mutants. Moreover, WRKY71 was also proved to interact with ACS2 in vitro and in vivo. Treatment with AgNO3 and aminoethoxyvinylglycine and acs2-1 could greatly arrest the leaf senescence of WRKY71-1D. In conclusion, our data revealed that WRKY71 mediates ethylene signaling and synthesis to hasten leaf senescence in Arabidopsis.
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Affiliation(s)
- Yanchong Yu
- Shandong Key Laboratory of Plant Biotechnology, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Yanan Qi
- Shandong Key Laboratory of Plant Biotechnology, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jinpeng Xu
- Shandong Key Laboratory of Plant Biotechnology, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xuehuan Dai
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Jiacai Chen
- Shandong Key Laboratory of Plant Biotechnology, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Chun-Hai Dong
- Shandong Key Laboratory of Plant Biotechnology, College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Fengning Xiang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
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29
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Peng H, Neff MM. Two ATAF transcription factors ANAC102 and ATAF1 contribute to the suppression of cytochrome P450-mediated brassinosteroid catabolism in Arabidopsis. PHYSIOLOGIA PLANTARUM 2021; 172:1493-1505. [PMID: 33491178 DOI: 10.1111/ppl.13339] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/16/2020] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
PHYB ACTIVATION TAGGED SUPPRESSOR 1 (BAS1) and SUPPRESSOR OF PHYB-4 7 (SOB7) are two cytochrome P450 enzymes that inactivate brassinosteroids (BRs) in Arabidopsis. The NAC transcription factor (TF) ATAF2 (ANAC081) and the core circadian clock regulator CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) both suppress the expression of BAS1 and SOB7 via direct promoter binding. Additionally, BRs cause feedback suppression on ATAF2 expression. Here, we report that two ATAF-subgroup TFs, ANAC102 and ATAF1 (ANAC002), also contribute to the transcriptional suppression of BAS1 and SOB7. ANAC102 and ATAF1 gene-knockout mutants exhibit elevated expression of both BAS1 and SOB7, expanded tissue-level accumulation of their protein products and reduced hypocotyl growth in response to exogenous BR treatments. Similar to ATAF2, both ANAC102 and ATAF1 are transcriptionally suppressed by BRs and white light. Neither BAS1 nor SOB7 expression is further elevated in ATAF double or triple mutants, suggesting that the suppression effect of these three ATAFs is not additive. In addition, ATAF single, double, and triple mutants have similar levels of BR responsiveness with regard to hypocotyl elongation. ATAF2, ANAC102, ATAF1, and CCA1 physically interact with itself and each other, suggesting that they may coordinately suppress BAS1 and SOB7 expression via protein-protein interactions. Despite the absence of CCA1-binding elements in their promoters, ANAC102 and ATAF1 have similar transcript circadian oscillation patterns as that of CCA1, suggesting that these two ATAF genes may be indirectly regulated by the circadian clock.
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Affiliation(s)
- Hao Peng
- Department of Crop and Soil Sciences, Washington State University, Pullman, Washington, USA
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30
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Rankenberg T, Geldhof B, van Veen H, Holsteens K, Van de Poel B, Sasidharan R. Age-Dependent Abiotic Stress Resilience in Plants. TRENDS IN PLANT SCIENCE 2021; 26:692-705. [PMID: 33509699 DOI: 10.1016/j.tplants.2020.12.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 05/13/2023]
Abstract
Developmental age is a strong determinant of stress responses in plants. Differential susceptibility to various environmental stresses is widely observed at both the organ and whole-plant level. While it is clear that age determines stress susceptibility, the causes, regulatory mechanisms, and functions are only now beginning to emerge. Compared with concepts on age-related biotic stress resilience, advancements in the abiotic stress field are relatively limited. In this review, we focus on current knowledge of ontogenic resistance to abiotic stresses, highlighting examples at the organ (leaf) and plant level, preceded by an overview of the relevant concepts in plant aging. We also discuss age-related abiotic stress resilience mechanisms, speculate on their functional relevance, and outline outstanding questions.
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Affiliation(s)
- Tom Rankenberg
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Batist Geldhof
- Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Willem de Croylaan 42, 3001 Leuven, Belgium
| | - Hans van Veen
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Kristof Holsteens
- Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Willem de Croylaan 42, 3001 Leuven, Belgium
| | - Bram Van de Poel
- Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Willem de Croylaan 42, 3001 Leuven, Belgium.
| | - Rashmi Sasidharan
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
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31
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Luo J, Li R, Xu X, Niu H, Zhang Y, Wang C. SMRT and Illumina RNA Sequencing and Characterization of a Key NAC Gene LoNAC29 during the Flower Senescence in Lilium oriental 'Siberia'. Genes (Basel) 2021; 12:genes12060869. [PMID: 34204040 PMCID: PMC8227295 DOI: 10.3390/genes12060869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/31/2021] [Accepted: 06/04/2021] [Indexed: 02/04/2023] Open
Abstract
Lily (Lilium spp.) is an important cut flower around the world. Flower senescence in lilies is characterized by the wilting and abscission of tepals, which results in a decrease in flower quality and huge economic loss. However, the mechanism underlying flower senescence in lilies is largely unknown. In this study, single-molecule, real-time (SMRT) and Illumina sequencing were carried out in L. oriental ‘Siberia’. Sequencing yielded 73,218 non-redundant transcripts, with an N50 of 3792 bp. These data were further integrated with three published transcriptomes through cogent analysis, which yielded 62,960 transcripts, with an increase in N50 of 3935 bp. Analysis of differentially expressed genes showed that 319 transcription factors were highly upregulated during flower senescence. The expression of twelve NAC genes and eleven senescence-associated genes (SAGs) showed that LoNAC29 and LoSAG39 were highly expressed in senescent flowers. Transient overexpression of LoNAC29 and LoSAG39 in tepals of lily notably accelerated flower senescence, and the promoter activity of LoSAG39 was strongly induced by LoNAC29. This work supported new evidence for the molecular mechanism of flower senescence and provided better sequence data for further study in lilies.
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Affiliation(s)
- Jing Luo
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (R.L.); (X.X.); (H.N.); (Y.Z.)
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan 430070, China
| | - Ruirui Li
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (R.L.); (X.X.); (H.N.); (Y.Z.)
| | - Xintong Xu
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (R.L.); (X.X.); (H.N.); (Y.Z.)
| | - Hairui Niu
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (R.L.); (X.X.); (H.N.); (Y.Z.)
| | - Yujie Zhang
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (R.L.); (X.X.); (H.N.); (Y.Z.)
| | - Caiyun Wang
- Key Laboratory for Biology of Horticultural Plants, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (R.L.); (X.X.); (H.N.); (Y.Z.)
- Key Laboratory of Urban Agriculture in Central China, Ministry of Agriculture, Wuhan 430070, China
- Correspondence: ; Tel.: +86-027-87282010
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Yi SY, Rameneni JJ, Lee M, Song SG, Choi Y, Lu L, Lee H, Lim YP. Comparative Transcriptome-Based Mining of Senescence-Related MADS, NAC, and WRKY Transcription Factors in the Rapid-Senescence Line DLS-91 of Brassica rapa. Int J Mol Sci 2021; 22:ijms22116017. [PMID: 34199515 PMCID: PMC8199657 DOI: 10.3390/ijms22116017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 11/16/2022] Open
Abstract
Leaf senescence is a developmental process induced by various molecular and environmental stimuli that may affect crop yield. The dark-induced leaf senescence-91 (DLS-91) plants displayed rapid leaf senescence, dramatically decreased chlorophyll contents, low photochemical efficiencies, and upregulation of the senescence-associated marker gene BrSAG12-1. To understand DLS molecular mechanism, we examined transcriptomic changes in DLS-91 and control line DLS-42 following 0, 1, and 4 days of dark treatment (DDT) stages. We identified 501, 446, and 456 DEGs, of which 16.7%, 17.2%, and 14.4% encoded TFs, in samples from the three stages. qRT-PCR validation of 16 genes, namely, 7 MADS, 6 NAC, and 3 WRKY, suggested that BrAGL8-1, BrAGL15-1, and BrWRKY70-1 contribute to the rapid leaf senescence of DLS-91 before (0 DDT) and after (1 and 4 DDT) dark treatment, whereas BrNAC046-2, BrNAC029-2/BrNAP, and BrNAC092-1/ORE1 TFs may regulate this process at a later stage (4 DDT). In-silico analysis of cis-acting regulatory elements of BrAGL8-1, BrAGL42-1, BrNAC029-2, BrNAC092-1, and BrWRKY70-3 of B. rapa provides insight into the regulation of these genes. Our study has uncovered several AGL-MADS, WRKY, and NAC TFs potentially worthy of further study to understand the underlying mechanism of rapid DLS in DLS-91.
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Affiliation(s)
- So Young Yi
- Institute of Agricultural Science, Chungnam National University, Daejeon 34134, Korea; (S.Y.Y.); (J.J.R.); (M.L.)
| | - Jana Jeevan Rameneni
- Institute of Agricultural Science, Chungnam National University, Daejeon 34134, Korea; (S.Y.Y.); (J.J.R.); (M.L.)
| | - Myungjin Lee
- Institute of Agricultural Science, Chungnam National University, Daejeon 34134, Korea; (S.Y.Y.); (J.J.R.); (M.L.)
| | - Seul Gi Song
- Molecular Genetics and Genomics Laboratory, Department of Horticulture, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea; (S.G.S.); (Y.C.); (L.L.); (H.L.)
| | - Yuri Choi
- Molecular Genetics and Genomics Laboratory, Department of Horticulture, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea; (S.G.S.); (Y.C.); (L.L.); (H.L.)
| | - Lu Lu
- Molecular Genetics and Genomics Laboratory, Department of Horticulture, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea; (S.G.S.); (Y.C.); (L.L.); (H.L.)
| | - Hyeokgeun Lee
- Molecular Genetics and Genomics Laboratory, Department of Horticulture, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea; (S.G.S.); (Y.C.); (L.L.); (H.L.)
| | - Yong Pyo Lim
- Molecular Genetics and Genomics Laboratory, Department of Horticulture, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea; (S.G.S.); (Y.C.); (L.L.); (H.L.)
- Correspondence: ; Tel.: +82-42-821-5739; Fax: +82-42-821-8847
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Wang Z, Li ZF, Wang SS, Xiao YS, Xie XD, Wu MZ, Yu JL, Cheng LR, Yang AG, Yang J. NtMYB12a acts downstream of sucrose to inhibit fatty acid accumulation by targeting lipoxygenase and SFAR genes in tobacco. PLANT, CELL & ENVIRONMENT 2021; 43:2287-2300. [PMID: 33225450 DOI: 10.1111/pce.13803] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 03/31/2020] [Accepted: 04/26/2020] [Indexed: 05/18/2023]
Abstract
MYB12 promotes flavonol biosynthesis in plants by targeting several early biosynthesis genes (EBGs) of this pathway. The transcriptions of these EBGs are also induced by sucrose signal. However, whether MYB12 is activated by sucrose signal and what the other roles MYB12 has in regulating plant metabolism are poorly understood. In this study, two NtMYB12 genes were cloned from Nicotiana tabacum. Both NtMYB12a and NtMYB12b are involved in regulating flavonoids biosynthesis in tobacco. NtMYB12a is further shown to inhibit the accumulation of fatty acid (FA) in tobacco leaves and seeds. Post-translational activation and chromatin immunoprecipitation assays demonstrate that NtMYB12a directly promotes the transcriptions of NtLOX6, NtLOX5, NtSFAR4 and NtGDSL2, which encode lipoxygenase (LOX) or SFAR enzymes catalyzing the degradation of FA. NtLOX6 and NtLOX5 are shown to prevent the accumulation of FA in the mature seeds and significantly reduced the percentage of polyunsaturated fatty acids (PUFAs) in tobacco. Sucrose stimulates the transcription of NtMYB12a, and loss function of NtMYB12a partially suppresses the decrease of FA content in tobacco seedlings caused by sucrose treatment. The regulation of sucrose on the expression of NtLOX6 and NtGDSL2 genes is mediated by NtMYB12a, whereas those of NtLOX5 and NtSFAR4 genes are independent of sucrose.
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Affiliation(s)
- Zhong Wang
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Ze Feng Li
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Shan Shan Wang
- Xiangyang Cigarette Factory, China Tobacco Hubei Industrial Co., Ltd., Xiangyang, China
| | - Yan Song Xiao
- Chenzhou Tobacco Company of Hunan Province, Chenzhou, China
| | - Xiao Dong Xie
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Ming Zhu Wu
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Jin Long Yu
- Chenzhou Tobacco Company of Hunan Province, Chenzhou, China
| | - Li Rui Cheng
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Ai Guo Yang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Jun Yang
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
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Kan C, Zhang Y, Wang HL, Shen Y, Xia X, Guo H, Li Z. Transcription Factor NAC075 Delays Leaf Senescence by Deterring Reactive Oxygen Species Accumulation in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2021; 12:634040. [PMID: 33719309 PMCID: PMC7943619 DOI: 10.3389/fpls.2021.634040] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/22/2021] [Indexed: 05/23/2023]
Abstract
Leaf senescence is a highly complex genetic process that is finely tuned by multiple layers of regulation. Among them, transcriptional regulation plays a critical role in controlling the initiation and progression of leaf senescence. Here, we found that the NAC transcription factor NAC075 functions as a novel negative regulator of leaf senescence. Loss of function of NAC075 promotes leaf senescence in an age-dependent manner, whereas constitutive overexpression of NAC075 delays senescence in Arabidopsis. Transcriptome analysis revealed that transcript levels of antioxidant enzymes such as catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD) are significantly suppressed in nac075 mutants compared with wild-type plants. Electrophoretic mobility shift assay (EMSA) and chromatin immunoprecipitation (ChIP) analyses revealed that NAC075 directly binds the promoter of catalase 2 (CAT2). Moreover, genetic analysis showed that overexpression of CAT2 suppresses the overproduction of reactive oxygen species (ROS) and the early senescence phenotypes of nac075 mutants, suggesting that CAT2 acts downstream of NAC075 to delay leaf senescence by repressing ROS accumulation. Collectively, our findings provide a new regulatory module involving NAC075-CAT2-ROS in controlling leaf senescence in Arabidopsis.
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Affiliation(s)
- Chengcheng Kan
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Yi Zhang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
| | - Hou-Ling Wang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
| | - Yingbai Shen
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Xinli Xia
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Hongwei Guo
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China
| | - Zhonghai Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
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Ma J, Yuan M, Sun B, Zhang D, Zhang J, Li C, Shao Y, Liu W, Jiang L. Evolutionary Divergence and Biased Expression of NAC Transcription Factors in Hexaploid Bread Wheat ( Triticum aestivum L.). PLANTS 2021; 10:plants10020382. [PMID: 33671285 PMCID: PMC7922369 DOI: 10.3390/plants10020382] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/08/2021] [Accepted: 02/15/2021] [Indexed: 11/16/2022]
Abstract
The NAC genes, a large plant-specific family of transcription factors, regulate a wide range of pathways involved in development and response to biotic and abiotic stress. In this study, the NAC transcription factors were identified in 27 green plants, and the results showed that NAC transcription factors in plants undergo an appearance stage from water to land and a number expansion stage from gymnosperm to angiosperm. Investigating the evolutionary process of the NAC transcription factors from diploid species to hexaploid wheat revealed that tandem replications during the polyploidization process is an important event for increasing the number of NAC transcription factors in wheat. Then, the molecular characteristics, phylogenetic relationships, and expression patterns of 462 NAC transcription factors of hexaploid wheat (TaNACs) were analyzed. The protein structure results showed that TaNAC was relatively conservative at the N-terminal that contains five subdomains. All these TaNACs were divided into Group I and Group II by phylogenetic analysis, and the TaNACs in Group I should undergo strong artificial selection based on single nucleotide polymorphism (SNP) analysis. Through genome synteny and phylogenetic analysis, these TaNACs were classified into 88 groups and 9 clusters. The biased expression results of these TaNACs showed that there are 24 groups and 67 groups of neofunctionalization genes under biotic and abiotic stress, respectively, and 16 groups and 59 groups of subfunctionalization genes. This shows that neofunctionalization plays an important role in coping with different stresses. Our study provides new insights into the evolution of NAC transcription factors in hexaploid wheat.
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Affiliation(s)
- Jianhui Ma
- College of Life Science, Henan Normal University, Xinxiang 453007, China; (J.M.); (M.Y.); (B.S.); (D.Z.); (C.L.); (Y.S.)
| | - Meng Yuan
- College of Life Science, Henan Normal University, Xinxiang 453007, China; (J.M.); (M.Y.); (B.S.); (D.Z.); (C.L.); (Y.S.)
| | - Bo Sun
- College of Life Science, Henan Normal University, Xinxiang 453007, China; (J.M.); (M.Y.); (B.S.); (D.Z.); (C.L.); (Y.S.)
| | - Daijing Zhang
- College of Life Science, Henan Normal University, Xinxiang 453007, China; (J.M.); (M.Y.); (B.S.); (D.Z.); (C.L.); (Y.S.)
| | - Jie Zhang
- Collaborative Innovation Center of Henan Grain Crops, Agronomy College, Henan Agricultural University, Zhengzhou 450002, China;
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Chunxi Li
- College of Life Science, Henan Normal University, Xinxiang 453007, China; (J.M.); (M.Y.); (B.S.); (D.Z.); (C.L.); (Y.S.)
| | - Yun Shao
- College of Life Science, Henan Normal University, Xinxiang 453007, China; (J.M.); (M.Y.); (B.S.); (D.Z.); (C.L.); (Y.S.)
| | - Wei Liu
- Collaborative Innovation Center of Henan Grain Crops, Agronomy College, Henan Agricultural University, Zhengzhou 450002, China;
- Correspondence: (W.L.); (L.J.)
| | - Lina Jiang
- College of Life Science, Henan Normal University, Xinxiang 453007, China; (J.M.); (M.Y.); (B.S.); (D.Z.); (C.L.); (Y.S.)
- Correspondence: (W.L.); (L.J.)
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Yan J, Chen Q, Cui X, Zhao P, Gao S, Yang B, Liu JX, Tong T, Deyholos MK, Jiang YQ. Ectopic overexpression of a membrane-tethered transcription factor gene NAC60 from oilseed rape positively modulates programmed cell death and age-triggered leaf senescence. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 105:600-618. [PMID: 33119146 DOI: 10.1111/tpj.15057] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 07/08/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
Senescence is an integrative final stage of plant development that is governed by internal and external cues. The NAM, ATAF1/2, CUC2 (NAC) transcription factor (TF) family is specific to plants and membrane-tethered NAC TFs (MTTFs) constitute a unique and sophisticated mechanism in stress responses and development. However, the function of MTTFs in oilseed rape (Brassica napus L.) remains unknown. Here, we report that BnaNAC60 is an MTTF associated with the endoplasmic reticulum (ER) membrane. Expression of BnaNAC60 was induced during the progression of leaf senescence. Translocation of BnaNAC60 into nuclei was induced by ER stress and oxidative stress treatments. It binds to the NTLBS motif, rather than the canonical NAC recognition site. Overexpression of BnaNAC60 devoid of the transmembrane domain, but not the full-length BnaNAC60, induces significant reactive oxygen species (ROS) accumulation and hypersensitive response-like cell death in both tobacco (Nicotiana benthamiana) and oilseed rape protoplasts. Moreover, ectopic overexpression of BnaNAC60 devoid of the transmembrane domain, but not the full-length BnaNAC60, in Arabidopsis also induces precocious leaf senescence. Furthermore, screening and expression profiling identified an array of functional genes that are significantly induced by BnaNAC60 expression. Further it was found that BnaNAC60 can activate the promoter activities of BnaNYC1, BnaRbohD, BnaBFN1, BnaZAT12, and multiple BnaVPEs in a dual-luciferase reporter assay. Electrophoretic mobility shift assay and chromatin immunoprecipitation coupled to quantitative PCR assays revealed that BnaNAC60 directly binds to the promoter regions of these downstream target genes. To summarize, our data show that BnaNAC60 is an MTTF that modulates cell death, ROS accumulation, and leaf senescence.
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Affiliation(s)
- Jingli Yan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Qinqin Chen
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Xing Cui
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Peiyu Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Shidong Gao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Bo Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Jian-Xiang Liu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Tiantian Tong
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
| | - Michael K Deyholos
- Department of Biology, University of British Columbia, Okanagan Campus, Kelowna, BC, V1V 1V7, Canada
| | - Yuan-Qing Jiang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, 712100, China
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Zhang YM, Guo P, Xia X, Guo H, Li Z. Multiple Layers of Regulation on Leaf Senescence: New Advances and Perspectives. FRONTIERS IN PLANT SCIENCE 2021; 12:788996. [PMID: 34938309 PMCID: PMC8685244 DOI: 10.3389/fpls.2021.788996] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/03/2021] [Indexed: 05/22/2023]
Abstract
Leaf senescence is the last stage of leaf development and is an orderly biological process accompanied by degradation of macromolecules and nutrient recycling, which contributes to plant fitness. Forward genetic mutant screening and reverse genetic studies of senescence-associated genes (SAGs) have revealed that leaf senescence is a genetically regulated process, and the initiation and progression of leaf senescence are influenced by an array of internal and external factors. Recently, multi-omics techniques have revealed that leaf senescence is subjected to multiple layers of regulation, including chromatin, transcriptional and post-transcriptional, as well as translational and post-translational levels. Although impressive progress has been made in plant senescence research, especially the identification and functional analysis of a large number of SAGs in crop plants, we still have not unraveled the mystery of plant senescence, and there are some urgent scientific questions in this field, such as when plant senescence is initiated and how senescence signals are transmitted. This paper reviews recent advances in the multiple layers of regulation on leaf senescence, especially in post-transcriptional regulation such as alternative splicing.
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Affiliation(s)
- Yue-Mei Zhang
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Pengru Guo
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Xinli Xia
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
| | - Hongwei Guo
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Department of Biology, Southern University of Science and Technology, Shenzhen, China
| | - Zhonghai Li
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China
- *Correspondence: Zhonghai Li,
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38
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Hinckley WE, Brusslan JA. Gene expression changes occurring at bolting time are associated with leaf senescence in Arabidopsis. PLANT DIRECT 2020; 4:e00279. [PMID: 33204935 PMCID: PMC7649007 DOI: 10.1002/pld3.279] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 09/13/2020] [Accepted: 09/30/2020] [Indexed: 05/29/2023]
Abstract
In plants, the vegetative to reproductive phase transition (termed bolting in Arabidopsis) generally precedes age-dependent leaf senescence (LS). Many studies describe a temporal link between bolting time and LS, as plants that bolt early, senesce early, and plants that bolt late, senesce late. The molecular mechanisms underlying this relationship are unknown and are potentially agriculturally important, as they may allow for the development of crops that can overcome early LS caused by stress-related early-phase transition. We hypothesized that leaf gene expression changes occurring in synchrony with bolting were regulating LS. ARABIDOPSIS TRITHORAX (ATX) enzymes are general methyltransferases that regulate the adult vegetative to reproductive phase transition. We generated an atx1, atx3, and atx4 (atx1,3,4) triple T-DNA insertion mutant that displays both early bolting and early LS. This mutant was used in an RNA-seq time-series experiment to identify gene expression changes in rosette leaves that are likely associated with bolting. By comparing the early bolting mutant to vegetative WT plants of the same age, we were able to generate a list of differentially expressed genes (DEGs) that change expression with bolting as the plants age. We trimmed the list by intersection with publicly available WT datasets, which removed genes from our DEG list that were atx1,3,4 specific. The resulting 398 bolting-associated genes (BAGs) are differentially expressed in a mature rosette leaf at bolting. The BAG list contains many well-characterized LS regulators (ORE1, WRKY45, NAP, WRKY28), and GO analysis revealed enrichment for LS and LS-related processes. These bolting-associated LS regulators may contribute to the temporal coupling of bolting time to LS.
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Affiliation(s)
| | - Judy A. Brusslan
- Department of Biological SciencesCalifornia State UniversityLong Beach, Long BeachCAUSA
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Zeng HY, Li CY, Yao N. Fumonisin B1: A Tool for Exploring the Multiple Functions of Sphingolipids in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:600458. [PMID: 33193556 PMCID: PMC7652989 DOI: 10.3389/fpls.2020.600458] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 10/05/2020] [Indexed: 05/25/2023]
Abstract
Fumonisin toxins are produced by Fusarium fungal pathogens. Fumonisins are structural analogs of sphingosine and potent inhibitors of ceramide synthases (CerSs); they disrupt sphingolipid metabolism and cause disease in plants and animals. Over the past three decades, researchers have used fumonisin B1 (FB1), the most common fumonisin, as a probe to investigate sphingolipid metabolism in yeast and animals. Although the physiological effects of FB1 in plants have yet to be investigated in detail, forward and reverse genetic approaches have revealed many genes involved in these processes. In this review, we discuss the intricate network of signaling pathways affected by FB1, including changes in sphingolipid metabolism and the effects of these changes, with a focus on our current understanding of the multiple effects of FB1 on plant cell death and plant growth. We analyze the major findings that highlight the connections between sphingolipid metabolism and FB1-induced signaling, and we point out where additional research is needed to fill the gaps in our understanding of FB1-induced signaling pathways in plants.
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Affiliation(s)
- Hong-Yun Zeng
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resource, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Chun-Yu Li
- Institution of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Nan Yao
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resource, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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40
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Nagahage ISP, Sakamoto S, Nagano M, Ishikawa T, Mitsuda N, Kawai-Yamada M, Yamaguchi M. An Arabidopsis NAC domain transcription factor, ATAF2, promotes age-dependent and dark-induced leaf senescence. PHYSIOLOGIA PLANTARUM 2020; 170:299-308. [PMID: 32579231 DOI: 10.1111/ppl.13156] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/16/2020] [Accepted: 06/19/2020] [Indexed: 06/11/2023]
Abstract
Leaf senescence is controlled developmentally and environmentally and is affected by numerous genes, including transcription factors. An Arabidopsis NAC domain transcription factor, ATAF2, is known to regulate biotic stress responses. Recently, we have demonstrated that ATAF2 upregulates ORE1, a key regulator of leaf senescence. Here, to investigate the function of ATAF2 in leaf senescence further, we generated and analyzed overexpressing transgenic and T-DNA inserted mutant lines. Transient expression analysis indicated that ATAF2 upregulates several NAC domain transcription factors that regulate senescence. Indeed, ATAF2 overexpression induced the expression of senescence-related genes, thereby accelerating leaf senescence, whereas the expression of such genes in ataf2 mutants was lower than that of wild-type plants. Furthermore, the ataf2 mutants exhibited significant delays in dark-induced leaf senescence. It was also found that ATAF2 induces the expression of transcription factors, which both promotes and represses leaf senescence. The present study demonstrates that ATAF2 promotes leaf senescence in response to developmental and environmental signals.
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Affiliation(s)
| | - Shingo Sakamoto
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan
| | - Minoru Nagano
- Graduate School of Science and Engineering, Saitama University, Saitama, Japan
- College of Life Sciences, Ritsumeikan University, Kusatsu, Japan
| | - Toshiki Ishikawa
- Graduate School of Science and Engineering, Saitama University, Saitama, Japan
| | - Nobutaka Mitsuda
- Graduate School of Science and Engineering, Saitama University, Saitama, Japan
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan
| | - Maki Kawai-Yamada
- Graduate School of Science and Engineering, Saitama University, Saitama, Japan
| | - Masatoshi Yamaguchi
- Graduate School of Science and Engineering, Saitama University, Saitama, Japan
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41
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Peng H, Phung J, Zhai Y, Neff MM. Self-transcriptional repression of the Arabidopsis NAC transcription factor ATAF2 and its genetic interaction with phytochrome A in modulating seedling photomorphogenesis. PLANTA 2020; 252:48. [PMID: 32892254 DOI: 10.1007/s00425-020-03456-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
The NAC transcription factor ATAF2 suppresses its own transcription via self-promoter binding. ATAF2 genetically interacts with the circadian regulator CCA1 and phytochrome A to modulate seedling photomorphogenesis in Arabidopsis thaliana. ATAF2 (ANAC081) is a NAC (NAM, ATAF and CUC) transcription factor (TF) that participates in the regulation of disease resistance, stress tolerance and hormone metabolism in Arabidopsis thaliana. We previously reported that ATAF2 promotes Arabidopsis hypocotyl growth in a light-dependent manner via transcriptionally suppressing the brassinosteroid (BR)-inactivating cytochrome P450 genes BAS1 (CYP734A1, formerly CYP72B1) and SOB7 (CYP72C1). Assays using low light intensities suggest that the photoreceptor phytochrome A (PHYA) may play a more critical role in ATAF2-regulated photomorphogenesis than phytochrome B (PHYB) and cryptochrome 1 (CRY1). In addition, ATAF2 is also regulated by the circadian clock. The core circadian TF CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) physically interacts with ATAF2 at the DNA-protein and protein-protein levels, and both differentially suppress BAS1- and SOB7-mediated BR catabolism. In this research, we show that ATAF2 can bind its own promoter as a transcriptional self-repressor. This self-feedback-suppression loop is a typical feature of multiple circadian-regulated genes. Additionally, ATAF2 and CCA1 synergistically suppress seedling photomorphogenesis as reflected by the light-dependent hypocotyl growth analysis of their single and double gene knock-out mutants. Similar fluence-rate response assays using ATAF2 and photoreceptor (PHYB, CRY1 and PHYA) knock-out mutants demonstrate that PHYA is required for ATAF2-regulated photomorphogenesis in a wide range of light intensities. Furthermore, disruption of PHYA can suppress the BR-insensitive hypocotyl-growth phenotype of ATAF2 loss-of-function seedlings in the light, but not in darkness. Collectively, our results provide a genetic interaction synopsis of the circadian-clock-photomorphogenesis-BR integration node involving ATAF2, CCA1 and PHYA.
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Affiliation(s)
- Hao Peng
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164, USA
| | - Jessica Phung
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164, USA
| | - Ying Zhai
- Department of Plant Pathology, Washington State University, Pullman, WA, 99164, USA
| | - Michael M Neff
- Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164, USA.
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Forlani S, Cozzi C, Rosa S, Tadini L, Masiero S, Mizzotti C. HEBE, a novel positive regulator of senescence in Solanum lycopersicum. Sci Rep 2020; 10:11021. [PMID: 32620827 PMCID: PMC7335192 DOI: 10.1038/s41598-020-67937-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 06/11/2020] [Indexed: 11/29/2022] Open
Abstract
Leaf senescence and plant aging are traits of great interest for breeders. Senescing cells undergo important physiological and biochemical changes, while cellular structures such as chloroplasts are degraded with dramatic metabolic consequences for the whole plant. The possibility of prolonging the photosynthetic ability of leaves could positively impact the plant's life span with benefits for biomass production and metabolite accumulation; plants with these characteristics display a stay-green phenotype. A group of plant transcription factors known as NAC play a pivotal role in controlling senescence: here we describe the involvement of the tomato NAC transcription factor Solyc12g036480, which transcript is present in leaves and floral buds. Since its silencing delays leaf senescence and prevents plants from ageing, we renamed Solyc12g0364 HḖBĒ, for the Greek goddess of youth. In this manuscript we describe how HEB downregulation negatively affects the progression of senescence, resulting in changes in transcription of senescence-promoting genes, as well as the activity of enzymes involved in chlorophyll degradation, thereby explaining the stay-green phenotype.
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Affiliation(s)
- Sara Forlani
- Department of Biosciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Carolina Cozzi
- Department of Biosciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Stefano Rosa
- Department of Biosciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Luca Tadini
- Department of Biosciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy
| | - Simona Masiero
- Department of Biosciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy.
| | - Chiara Mizzotti
- Department of Biosciences, Università degli Studi di Milano, Via Celoria 26, 20133, Milan, Italy.
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Genetic Network between Leaf Senescence and Plant Immunity: Crucial Regulatory Nodes and New Insights. PLANTS 2020; 9:plants9040495. [PMID: 32294898 PMCID: PMC7238237 DOI: 10.3390/plants9040495] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 12/30/2022]
Abstract
Leaf senescence is an essential physiological process that is accompanied by the remobilization of nutrients from senescent leaves to young leaves or other developing organs. Although leaf senescence is a genetically programmed process, it can be induced by a wide variety of biotic and abiotic factors. Accumulating studies demonstrate that senescence-associated transcription factors (Sen-TFs) play key regulatory roles in controlling the initiation and progression of leaf senescence process. Interestingly, recent functional studies also reveal that a number of Sen-TFs function as positive or negative regulators of plant immunity. Moreover, the plant hormone salicylic acid (SA) and reactive oxygen species (ROS) have been demonstrated to be key signaling molecules in regulating leaf senescence and plant immunity, suggesting that these two processes share similar or common regulatory networks. However, the interactions between leaf senescence and plant immunity did not attract sufficient attention to plant scientists. Here, we review the regulatory roles of SA and ROS in biotic and abiotic stresses, as well as the cross-talks between SA/ROS and other hormones in leaf senescence and plant immunity, summarize the transcriptional controls of Sen-TFs on SA and ROS signal pathways, and analyze the cross-regulation between senescence and immunity through a broad literature survey. In-depth understandings of the cross-regulatory mechanisms between leaf senescence and plant immunity will facilitate the cultivation of high-yield and disease-resistant crops through a molecular breeding strategy.
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Gupta A, Sinha R, Fernandes JL, Abdelrahman M, Burritt DJ, Tran LSP. Phytohormones regulate convergent and divergent responses between individual and combined drought and pathogen infection. Crit Rev Biotechnol 2020; 40:320-340. [DOI: 10.1080/07388551.2019.1710459] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Aarti Gupta
- Institute of Plant Genetics, Polish Academy of Sciences, Poznan, Poland
| | | | - Joel Lars Fernandes
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | - Mostafa Abdelrahman
- Arid Land Research Center, Tottori University, Tottori, Japan
- Botany Department, Faculty of Science, Aswan University, Aswan, Egypt
| | | | - Lam-Son Phan Tran
- Plant Stress Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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Mahmood K, Zeisler-Diehl VV, Schreiber L, Bi YM, Rothstein SJ, Ranathunge K. Overexpression of ANAC046 Promotes Suberin Biosynthesis in Roots of Arabidopsis thaliana. Int J Mol Sci 2019; 20:ijms20246117. [PMID: 31817232 PMCID: PMC6940730 DOI: 10.3390/ijms20246117] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/27/2019] [Accepted: 12/02/2019] [Indexed: 01/09/2023] Open
Abstract
NAC (NAM (no apical meristem), ATAF1/2, and CUC2 (cup-shaped cotyledon)) proteins are one of the largest families of plant-specific transcription factors, and this family is present in a wide range of land plants. Here, we have investigated the role of ANAC046 in the regulation of suberin biosynthesis and deposition in Arabidopsis. Subcellular localization and transcriptional activity assays showed that ANAC046 localizes in the nucleus, where it functions as a transcription activator. Analysis of the PANAC046:GUS lines revealed that ANAC046 is mainly expressed in the root endodermis and periderm, and is also induced in leaves by wounding. The transgenic lines overexpressing ANAC046 exhibited defective surfaces on the aerial plant parts compared to the wild-type (WT) as characterized by increased permeability for Toluidine blue stain and greater chlorophyll leaching. Quantitative RT-PCR analysis showed that the expression of suberin biosynthesis genes was significantly higher in the roots and leaves of overexpression lines compared to the WT. The biochemical analysis of leaf cuticular waxes showed that the overexpression lines accumulated 30% more waxes than the WT. Concurrently, overexpression lines also deposited almost twice the amount of suberin content in their roots compared with the WT. Taken together, these results showed that ANAC046 is an important transcription factor that promotes suberin biosynthesis in Arabidopsis thaliana roots.
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Affiliation(s)
- Kashif Mahmood
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G2W1, Canada; (K.M.); (Y.-M.B.); (S.J.R.)
- Noble Research Institute, Limited Liability Company (LLC), 2510 Sam Noble Parkway, Ardmore, OK 73401, USA
| | - Viktoria Valeska Zeisler-Diehl
- Department of Plant Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115 Bonn, Germany; (V.V.Z.-D.); (L.S.)
| | - Lukas Schreiber
- Department of Plant Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, Kirschallee 1, 53115 Bonn, Germany; (V.V.Z.-D.); (L.S.)
| | - Yong-Mei Bi
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G2W1, Canada; (K.M.); (Y.-M.B.); (S.J.R.)
| | - Steven J. Rothstein
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G2W1, Canada; (K.M.); (Y.-M.B.); (S.J.R.)
| | - Kosala Ranathunge
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G2W1, Canada; (K.M.); (Y.-M.B.); (S.J.R.)
- School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawly, Perth, WA 6009, Australia
- Correspondence: ; Tel.: +61-8-6488-2047
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ANAC032 regulates root growth through the MYB30 gene regulatory network. Sci Rep 2019; 9:11358. [PMID: 31388054 PMCID: PMC6684591 DOI: 10.1038/s41598-019-47822-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 07/24/2019] [Indexed: 01/03/2023] Open
Abstract
Reactive oxygen species (ROS) play important roles as root growth regulators. We previously reported a comprehensive transcriptomic atlas, which we named ROS-map, that revealed ROS-responsible genes in Arabidopsis root tips. By using ROS-map, we have characterised an early ROS response key transcription factor, MYB30, as a regulator of root cell elongation under ROS signals. However, there are other ROS-responsible transcription factors which have the potential to regulate root growth. In the present study, we characterised the function of another early ROS-responsible transcription factor, ANAC032, that was selected from ROS-map. Overexpression of ANAC032 fused with the transcriptional activation domain, VP16, inhibited root growth, especially decreasing cell elongation. By transcriptome analysis, we revealed that ANAC032 regulated many stress-responsible genes in the roots. Intriguingly, ANAC032 upregulated MYB30 and its target genes. The upregulation of MYB30 target genes was completely abolished in the ANAC032-VP16x2 OX and ANAC032 estradiol-inducible line in myb30-2 mutants. Moreover, root growth inhibition was alleviated in ANAC032-OX in myb30-2 mutants. Overall, we characterised an upstream transcription factor, ANAC032, of the MYB30 transcriptional cascade which is a key regulator for root cell elongation under ROS signalling.
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Sun L, Zhang P, Wang R, Wan J, Ju Q, Rothstein SJ, Xu J. The SNAC-A Transcription Factor ANAC032 Reprograms Metabolism in Arabidopsis. PLANT & CELL PHYSIOLOGY 2019; 60:999-1010. [PMID: 30690513 DOI: 10.1093/pcp/pcz015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 01/11/2019] [Indexed: 06/09/2023]
Abstract
Studies have indicated that the carbon starvation response leads to the reprogramming of the transcriptome and metabolome, and many genes, including several important regulators, such as the group S1 basic leucine zipper transcription factors (TFs) bZIP1, bZIP11 and bZIP53, the SNAC-A TF ATAF1, etc., are involved in these physiological processes. Here, we show that the SNAC-A TF ANAC032 also plays important roles in this process. The overexpression of ANAC032 inhibits photosynthesis and induces reactive oxygen species accumulation in chloroplasts, thereby reducing sugar accumulation and resulting in carbon starvation. ANAC032 reprograms carbon and nitrogen metabolism by increasing sugar and amino acid catabolism in plants. The ChIP-qPCR and transient dual-luciferase reporter assays indicated that ANAC032 regulates trehalose metabolism via the direct regulation of TRE1 expression. Taken together, these results show that ANAC032 is an important regulator of the carbon/energy status that represses photosynthesis to induce carbon starvation.
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Affiliation(s)
- Liangliang Sun
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
| | - Ping Zhang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ruling Wang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
| | - Jinpeng Wan
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qiong Ju
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
| | - Steven J Rothstein
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, Canada
| | - Jin Xu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
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Xu Y, Magwanga RO, Cai X, Zhou Z, Wang X, Wang Y, Zhang Z, Jin D, Guo X, Wei Y, Li Z, Wang K, Liu F. Deep Transcriptome Analysis Reveals Reactive Oxygen Species (ROS) Network Evolution, Response to Abiotic Stress, and Regulation of Fiber Development in Cotton. Int J Mol Sci 2019; 20:E1863. [PMID: 30991750 PMCID: PMC6514600 DOI: 10.3390/ijms20081863] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/08/2019] [Accepted: 04/08/2019] [Indexed: 12/03/2022] Open
Abstract
Reactive oxygen species (ROS) are important molecules in the plant, which are involved in many biological processes, including fiber development and adaptation to abiotic stress in cotton. We carried out transcription analysis to determine the evolution of the ROS genes and analyzed their expression levels in various tissues of cotton plant under abiotic stress conditions. There were 515, 260, and 261 genes of ROS network that were identified in Gossypium hirsutum (AD₁ genome), G. arboreum (A genome), and G. raimondii (D genome), respectively. The ROS network genes were found to be distributed in all the cotton chromosomes, but with a tendency of aggregating on either the lower or upper arms of the chromosomes. Moreover, all the cotton ROS network genes were grouped into 17 families as per the phylogenetic tress analysis. A total of 243 gene pairs were orthologous in G. arboreum and G. raimondii. There were 240 gene pairs that were orthologous in G. arboreum, G. raimondii, and G. hirsutum. The synonymous substitution value (Ks) peaks of orthologous gene pairs between the At subgenome and the A progenitor genome (G. arboreum), D subgenome and D progenitor genome (G. raimondii) were 0.004 and 0.015, respectively. The Ks peaks of ROS network orthologous gene pairs between the two progenitor genomes (A and D genomes) and two subgenomes (At and Dt subgenome) were 0.045. The majority of Ka/Ks value of orthologous gene pairs between the A, D genomes and two subgenomes of TM-1 were lower than 1.0. RNA seq. analysis and RT-qPCR validation, showed that, CSD1,2,3,5,6; FSD1,2; MSD1,2; APX3,11; FRO5.6; and RBOH6 played a major role in fiber development while CSD1, APX1, APX2, MDAR1, GPX4-6-7, FER2, RBOH6, RBOH11, and FRO5 were integral for enhancing salt stress in cotton. ROS network-mediated signal pathway enhances the mechanism of fiber development and regulation of abiotic stress in Gossypium. This study will enhance the understanding of ROS network and form the basic foundation in exploring the mechanism of ROS network-involving the fiber development and regulation of abiotic stress in cotton.
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Affiliation(s)
- Yanchao Xu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Richard Odongo Magwanga
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
- Jaramogi Oginga Odinga University of Science and Technology (JOOUST), School of Biological and Physical Sciences (SPBS), P.O BOX 210-40600, Bondo, Kenya.
| | - Xiaoyan Cai
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Zhongli Zhou
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Xingxing Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Yuhong Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Zhenmei Zhang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Dingsha Jin
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Xinlei Guo
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Yangyang Wei
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
- Biological and Food Engineering, Anyang Institute of Technology, Anyang 455000, China.
| | - Zhenqing Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Kunbo Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
| | - Fang Liu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences (ICR, CAAS), Anyang 455000, China.
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Amirbakhtiar N, Ismaili A, Ghaffari MR, Nazarian Firouzabadi F, Shobbar ZS. Transcriptome response of roots to salt stress in a salinity-tolerant bread wheat cultivar. PLoS One 2019; 14:e0213305. [PMID: 30875373 PMCID: PMC6420002 DOI: 10.1371/journal.pone.0213305] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 02/19/2019] [Indexed: 01/09/2023] Open
Abstract
Salt stress is one of the major adverse environmental factors limiting crop productivity. Considering Iran as one of the bread wheat origins, we sequenced root transcriptome of an Iranian salt tolerant cultivar, Arg, under salt stress to extend our knowledge of the molecular basis of salinity tolerance in Triticum aestivum. RNA sequencing resulted in more than 113 million reads and about 104013 genes were obtained, among which 26171 novel transcripts were identified. A comparison of abundances showed that 5128 genes were differentially expressed due to salt stress. The differentially expressed genes (DEGs) were annotated with Gene Ontology terms, and the key pathways were identified using Kyoto Encyclopedia of Gene and Genomes (KEGG) pathway mapping. The DEGs could be classified into 227 KEGG pathways among which transporters, phenylpropanoid biosynthesis, transcription factors, glycosyltransferases, glutathione metabolism and plant hormone signal transduction represented the most significant pathways. Furthermore, the expression pattern of nine genes involved in salt stress response was compared between the salt tolerant (Arg) and susceptible (Moghan3) cultivars. A panel of novel genes and transcripts is found in this research to be differentially expressed under salinity in Arg cultivar and a model is proposed for salt stress response in this salt tolerant cultivar of wheat employing the DEGs. The achieved results can be beneficial for better understanding and improvement of salt tolerance in wheat.
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Affiliation(s)
- Nazanin Amirbakhtiar
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Lorestan University, Khorramabad, Iran
| | - Ahmad Ismaili
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Lorestan University, Khorramabad, Iran
| | - Mohammad Reza Ghaffari
- Department of Systems Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | | | - Zahra-Sadat Shobbar
- Department of Systems Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
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Yang X, Kim MY, Ha J, Lee SH. Overexpression of the Soybean NAC Gene GmNAC109 Increases Lateral Root Formation and Abiotic Stress Tolerance in Transgenic Arabidopsis Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:1036. [PMID: 32153598 PMCID: PMC6707213 DOI: 10.3389/fpls.2019.01036] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 07/24/2019] [Indexed: 05/02/2023]
Abstract
NACs are plant-specific transcription factors that have crucial roles in plant development and biotic and/or abiotic stress responses. This study characterized the functions of the soybean NAC gene GmNAC109 using an overexpression construct in Arabidopsis lines. Sequence analysis revealed that GmNAC109 is highly homologous to ATAF1 (Arabidopsis Transcription Activation Factor 1), which regulates biotic and abiotic stress responses. GmNAC109 protein localized to the nucleus and its C-terminal domain exhibited transcriptional activation activity. Salt, dehydration, and cold stresses significantly increased expression of GmNAC109 in soybean. Similarly, Arabidopsis plants overexpressing GmNAC109 were more tolerant to drought and salt stress than wild-type Col-0 plants. Stress response-related genes, such as DREB1A (drought-responsive element-binding 1A), DREB2A, AREB1 (ABSCISIC ACID-RESPONSIVE ELEMENT BINDING PROTEIN 1), AREB2, RD29A (RESPONSIVE TO Desiccation 29A), and COR15A (COLD REGULATED 15A) were upregulated in GmNAC109-overexpressing transgenic Arabidopsis lines. The transgenic lines showed upregulation of the ABA-responsive genes ABI1 (ABA INSENSITIVE 1) and ABI5 and hypersensitivity to ABA. However, GmNAC109 did not increase expression of the ABA-biosynthetic gene NCED3 (NINE-CIS-EPOXYCAROTENOID DIOXYGENASE 3) and endogenous ABA content in the transgenic lines. Overexpression of GmNAC109 significantly increased lateral root formation in transgenic Arabidopsis lines. Expression of AIR3 (AUXIN-INDUCED IN ROOT CULTURES 3) and ARF2 (AUXIN RESPONSE FACTOR 2) was increased and decreased in these transgenic lines, respectively, indicating that GmNAC109 is involved in the auxin signaling pathway and thereby helps to regulate hairy root formation. Our results provide a basis for development of soybean lines with improved tolerance to abiotic stresses via genetic manipulation.
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Affiliation(s)
- Xuefei Yang
- Department of Plant Science and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
| | - Moon Young Kim
- Department of Plant Science and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
- Plant Genomics and Breeding Institute, Seoul National University, Seoul, South Korea
| | - Jungmin Ha
- Department of Plant Science and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
- Plant Genomics and Breeding Institute, Seoul National University, Seoul, South Korea
| | - Suk-Ha Lee
- Department of Plant Science and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, South Korea
- Plant Genomics and Breeding Institute, Seoul National University, Seoul, South Korea
- *Correspondence: Suk-Ha Lee,
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