1
|
Shen Y, Zou J, Zhang Q, Luo P, Shang W, Sun T, Shi L, Wang Z, Li Y. Identification of PP2Cs in six rosaceae species highlights RcPP2C24 as a negative regulator in rose drought tolerance. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 212:108782. [PMID: 38850728 DOI: 10.1016/j.plaphy.2024.108782] [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: 03/31/2024] [Revised: 04/29/2024] [Accepted: 05/28/2024] [Indexed: 06/10/2024]
Abstract
Drought is a major environmental stress that limits plant growth, so it's important to identify drought-responsive genes to understand the mechanism of drought response and breed drought-tolerant roses. Protein phosphatase 2C (PP2C) plays a crucial role in plant abiotic stress response. In this study, we identified 412 putative PP2Cs from six Rosaceae species. These genes were divided into twelve clades, with clade A containing the largest number of PP2Cs (14.1%). Clade A PP2Cs are known for their important role in ABA-mediated drought stress response; therefore, the analysis focused on these specific genes. Conserved motif analysis revealed that clade A PP2Cs in these six Rosaceae species shared conserved C-terminal catalytic domains. Collinearity analysis indicated that segmental duplication events played a significant role in the evolution of clade A PP2Cs in Rosaceae. Analysis of the expression of 11 clade A RcPP2Cs showed that approximately 60% of these genes responded to drought, high temperature, and salt stress. Among them, RcPP2C24 exhibited the highest responsiveness to both drought and ABA. Furthermore, overexpression of RcPP2C24 significantly reduced drought tolerance in transgenic tobacco by increasing stomatal aperture after exposure to drought stress. The transient overexpression of RcPP2C24 weakened the dehydration tolerance of rose petal discs, while its silencing increased their dehydration tolerance. In summary, our study identified PP2Cs in six Rosaceae species and highlighted the negative role of RcPP2C24 on rose's drought tolerance by inhibiting stomatal closure. Our findings provide valuable insights into understanding the mechanism behind rose's response to drought.
Collapse
Affiliation(s)
- Yuxiao Shen
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China
| | - Jinyu Zou
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China
| | - Qian Zhang
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China
| | - Ping Luo
- College of Horticulture Science, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Zhejiang Moutainous, Zhejiang A & F University, Hangzhou 311300, China
| | - Wenqian Shang
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China
| | - Tianxiao Sun
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China
| | - Liyun Shi
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China.
| | - Zheng Wang
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China.
| | - Yonghua Li
- College of Landscape Architecture and Art, Henan Agricultural University, Zhengzhou 450002, China.
| |
Collapse
|
2
|
Li Q, Yu H, Chang W, Chang S, Guzmán M, Faure L, Wallner ES, Yan H, Greb T, Wang L, Yao R, Nelson DC. SMXL5 attenuates strigolactone signaling in Arabidopsis thaliana by inhibiting SMXL7 degradation. MOLECULAR PLANT 2024; 17:631-647. [PMID: 38475994 DOI: 10.1016/j.molp.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 01/10/2024] [Accepted: 03/07/2024] [Indexed: 03/14/2024]
Abstract
Hormone-activated proteolysis is a recurring theme of plant hormone signaling mechanisms. In strigolactone signaling, the enzyme receptor DWARF14 (D14) and an F-box protein, MORE AXILLARY GROWTH2 (MAX2), mark SUPPRESSOR OF MAX2 1-LIKE (SMXL) family proteins SMXL6, SMXL7, and SMXL8 for rapid degradation. Removal of these transcriptional corepressors initiates downstream growth responses. The homologous proteins SMXL3, SMXL4, and SMXL5, however, are resistant to MAX2-mediated degradation. We discovered that the smxl4 smxl5 mutant has enhanced responses to strigolactone. SMXL5 attenuates strigolactone signaling by interfering with AtD14-SMXL7 interactions. SMXL5 interacts with AtD14 and SMXL7, providing two possible ways to inhibit SMXL7 degradation. SMXL5 function is partially dependent on an ethylene-responsive-element binding-factor-associated amphiphilic repression (EAR) motif, which typically mediates interactions with the TOPLESS family of transcriptional corepressors. However, we found that loss of the EAR motif reduces SMXL5-SMXL7 interactions and the attenuation of strigolactone signaling by SMXL5. We hypothesize that integration of SMXL5 into heteromeric SMXL complexes reduces the susceptibility of SMXL6/7/8 proteins to strigolactone-activated degradation and that the EAR motif promotes the formation or stability of these complexes. This mechanism may provide a way to spatially or temporally fine-tune strigolactone signaling through the regulation of SMXL5 expression or translation.
Collapse
Affiliation(s)
- Qingtian Li
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA 92521, USA; Yazhouwan National Laboratory, Sanya 572025, China; Hainan Seed Industry Laboratory, Sanya 57205, China.
| | - Haiyang Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410082, China
| | - Wenwen Chang
- Key Laboratory of Seed Innovation, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sunhyun Chang
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA 92521, USA
| | - Michael Guzmán
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA 92521, USA
| | - Lionel Faure
- School of the Sciences, Biology Division, Texas Woman's University, Denton, TX 76204, USA
| | - Eva-Sophie Wallner
- Centre for Organismal Studies (COS), Heidelberg University, 69120 Heidelberg, Germany
| | - Heqin Yan
- Yazhouwan National Laboratory, Sanya 572025, China
| | - Thomas Greb
- Centre for Organismal Studies (COS), Heidelberg University, 69120 Heidelberg, Germany
| | - Lei Wang
- Key Laboratory of Seed Innovation, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China
| | - Ruifeng Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410082, China.
| | - David C Nelson
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA 92521, USA.
| |
Collapse
|
3
|
Fang P, Li M, Guo Q, Wu X, Hu Y, Cheng Y, Xu P. Genome-wide analysis of the SMXL gene family in common bean and identification of karrikin-responsive PvSMXL2 as a negative regulator of PEG-induced drought stress. Gene 2023; 887:147741. [PMID: 37634881 DOI: 10.1016/j.gene.2023.147741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/05/2023] [Accepted: 08/24/2023] [Indexed: 08/29/2023]
Abstract
Common bean (Phaseolus vulgaris L.) is a major legume crop worldwide, but its growth and development frequently face challenges due to abiotic stresses, particularly drought. Proper supplement of copper could mitigate the adverse effects of drought, but excessive accumulation of this metal in plants can be harmful. The suppressor of MAX2 1-like (SMXL) gene family, which plays important roles in various plant processes, including stress responses, remains poorly understood in common bean. In this study, we identified nine orthologues of SMXL genes in common bean, which are located on six chromosomes and classified into four subgroups. Basic molecular properties, including theoretical isoelectric point (PI), molecular weight (MW), grand average of hydropathicity (GVIO), gene structure, and conserved motifs were characterized, and numerous cis-elements in promoters were predicted. The expression patterns of PvSMXL genes were found to be distinct under 10% polyethylene glycol (PEG)-induced drought stress and 200 μM Cu treatments. Most PvSMXLs showed reduced expression in response to Cu treatment, whereas nearly half PvSMXLs exhibited inducible expression under drought stress. PvSMXL2, which exhibited a rapid response to karrikin 1 (KAR1), an active form of the plant growth regulators newly found in the smoke of burning plant material, was down-regulated by both PEG-induced drought and Cu stresses. Transient silencing of PvSMXL2 resulted in enhanced drought stress tolerance without conferring Cu tolerance. These findings provide valuable insights into the functions of SMXL genes in common bean under abiotic stress conditions.
Collapse
Affiliation(s)
- Pingping Fang
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang, College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Minxuan Li
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang, College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Qinwei Guo
- Quzhou Key Laboratory for Germplasm Innovation and Utilization of Crop, Institute of Vegetables, Quzhou Academy of Agricultural and Forestry Sciences, Quzhou 324000, PR China
| | - Xinyang Wu
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang, College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Yannan Hu
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang, College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Yusu Cheng
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang, College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China
| | - Pei Xu
- Key Laboratory of Specialty Agri-Product Quality and Hazard Controlling Technology of Zhejiang, College of Life Sciences, China Jiliang University, Hangzhou 310018, PR China.
| |
Collapse
|
4
|
Chen H, Lv W, Zhang W, Zhao J, Zhang Q, Zhang Z. Integrated comparative transcriptome and physiological analysis reveals the metabolic responses underlying genotype variations in NH 4+ tolerance. FRONTIERS IN PLANT SCIENCE 2023; 14:1286174. [PMID: 38192699 PMCID: PMC10773859 DOI: 10.3389/fpls.2023.1286174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 11/16/2023] [Indexed: 01/10/2024]
Abstract
Several mechanisms have been proposed to explain NH4 + toxicity. However, the core information about the biochemical regulation of plants in response to NH4 + toxicity is still lacking. In this study, the tissue NH4 + concentration is an important factor contributing to variations in plant growth even under nitrate nutrition and NH4 + tolerance under ammonium nutrition. Furthermore, NH4 + led to the reprogramming of the transcriptional profile, as genes related to trehalose-6-phosphate and zeatin biosynthesis were downregulated, whereas genes related to nitrogen metabolism, camalexin, stilbenoid and phenylpropanoid biosynthesis were upregulated. Further analysis revealed that a large number of genes, which enriched in phenylpropanoid and stilbenoid biosynthesis, were uniquely upregulated in the NH4 +- tolerant ecotype Or-1. These results suggested that the NH4 +-tolerant ecotype showed a more intense response to NH4 + by activating defense processes and pathways. Importantly, the tolerant ecotype had a higher 15NH4 + uptake and nitrogen utilization efficiency, but lower NH4 +, indicating the tolerant ecotype maintained a low NH4 + level, mainly by promoting NH4 + assimilation rather than inhibiting NH4 + uptake. The carbon and nitrogen metabolism analysis revealed that the tolerant ecotype had a stronger carbon skeleton production capacity with higher levels of hexokinase, pyruvate kinase, and glutamate dehydrogenase activity to assimilate free NH4 +, Taken together, the results revealed the core mechanisms utilized by plants in response to NH4 +, which are consequently of ecological and agricultural importance.
Collapse
Affiliation(s)
- Haifei Chen
- College of Resources, Hunan Agricultural University, Changsha, China
| | - Wei Lv
- College of Resources, Hunan Agricultural University, Changsha, China
| | - Wenqi Zhang
- College of Resources, Hunan Agricultural University, Changsha, China
| | - Jie Zhao
- College of Resources, Hunan Agricultural University, Changsha, China
| | - Quan Zhang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Zhenhua Zhang
- College of Resources, Hunan Agricultural University, Changsha, China
| |
Collapse
|
5
|
Yuan G, Lian Y, Wang J, Yong T, Gao H, Wu H, Yang T, Wang C. AtHSPR functions in gibberellin-mediated primary root growth by interacting with KNAT5 and OFP1 in Arabidopsis. PLANT CELL REPORTS 2023; 42:1629-1649. [PMID: 37597006 DOI: 10.1007/s00299-023-03057-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 08/02/2023] [Indexed: 08/21/2023]
Abstract
KEY MESSAGE AtHSPR forms a complex with KNAT5 and OFP1 to regulate primary root growth through GA-mediated root meristem activity. KNAT5-OFP1 functions as a negative regulator of AtHSPR in response to GA. Plant root growth is modulated by gibberellic acid (GA) signaling and depends on root meristem maintenance. ARABIDOPSIS THALIANA HEAT SHOCK PROTEIN-RELATED (AtHSPR) is a vital regulator of flowering time and salt stress tolerance. However, little is known about the role of AtHSPR in the regulation of primary root growth. Here, we report that athspr mutant exhibits a shorter primary root compared to wild type and that AtHSPR interacts with KNOTTED1-LIKE HOMEOBOX GENE 5 (KNAT5) and OVATE FAMILY PROTEIN 1 (OFP1). Genetic analysis showed that overexpression of KNAT5 or OFP1 caused a defect in primary root growth similar to that of the athspr mutant, but knockout of KNAT5 or OFP1 rescued the short root phenotype in the athspr mutant by altering root meristem activity. Further investigation revealed that KNAT5 interacts with OFP1 and that AtHSPR weakens the inhibition of GIBBERELLIN 20-OXIDASE 1 (GA20ox1) expression by the KNAT5-OFP1 complex. Moreover, root meristem cell proliferation and root elongation in 35S::KNAT5athspr and 35S::OFP1athspr seedlings were hypersensitive to GA3 treatment compared to the athspr mutant. Together, our results demonstrate that the AtHSPR-KNAT5-OFP1 module regulates root growth and development by impacting the expression of GA biosynthetic gene GA20ox1, which could be a way for plants to achieve plasticity in response to the environment.
Collapse
Affiliation(s)
- Guoqiang Yuan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Yuke Lian
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Junmei Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Taibi Yong
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Huanhuan Gao
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Haijun Wu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Tao Yang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China.
| | - Chongying Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China.
| |
Collapse
|
6
|
Mehdi SMM, Szczesniak MW, Ludwików A. The Bro1-like domain-containing protein, AtBro1, modulates growth and abiotic stress responses in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2023; 14:1157435. [PMID: 37251780 PMCID: PMC10213323 DOI: 10.3389/fpls.2023.1157435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/11/2023] [Indexed: 05/31/2023]
Abstract
Abscisic acid (ABA) affects plant physiology by altering gene expression, enabling plants to adapt to a wide range of environments. Plants have evolved protective mechanisms to allow seed germination in harsh conditions. Here, we explore a subset of these mechanisms involving the AtBro1 gene, which encodes one of a small family of poorly characterised Bro1-like domain-containing proteins, in Arabidopsis thaliana plants subjected to multiple abiotic stresses. AtBro1 transcripts were upregulated by salt, ABA and mannitol stress, while AtBro1-overexpression lines demonstrated robust tolerance to drought and salt stress. Furthermore, we found that ABA elicits stress-resistance responses in loss-of-function bro1-1 mutant plants and AtBro1 regulates drought resistance in Arabidopsis. When the AtBro1 promoter was fused to the β-glucuronidase (GUS) gene and introduced into plants, GUS was expressed mainly in rosette leaves and floral clusters, especially in anthers. Using a construct expressing an AtBro1-GFP fusion protein, AtBro1 was found to be localized in the plasma membrane in Arabidopsis protoplasts. A broad RNA-sequencing analysis revealed specific quantitative differences in the early transcriptional responses to ABA treatment between wild-type and loss-of-function bro1-1 mutant plants, suggesting that ABA stimulates stress-resistance responses via AtBro1. Additionally, transcripts levels of MOP9.5, MRD1, HEI10, and MIOX4 were altered in bro1-1 plants exposed to different stress conditions. Collectively, our results show that AtBro1 plays a significant role in the regulation of the plant transcriptional response to ABA and the induction of resistance responses to abiotic stress.
Collapse
Affiliation(s)
- Syed Muhammad Muntazir Mehdi
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Poznan, Poland
| | - Michal Wojciech Szczesniak
- Institute of Human Biology and Evolution, Faculty of Biology, Adam Mickiewicz University in Poznan, Poznan, Poland
| | - Agnieszka Ludwików
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznan, Poznan, Poland
| |
Collapse
|
7
|
Wei JT, Zhao SP, Zhang HY, Jin LG, Yu TF, Zheng L, Ma J, Chen J, Zhou YB, Chen M, Fu JD, Ma YZ, Xu ZS. GmDof41 regulated by the DREB1-type protein improves drought and salt tolerance by regulating the DREB2-type protein in soybean. Int J Biol Macromol 2023; 230:123255. [PMID: 36639088 DOI: 10.1016/j.ijbiomac.2023.123255] [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: 09/03/2022] [Accepted: 01/09/2023] [Indexed: 01/12/2023]
Abstract
Despite their essential and multiple roles in biological processes, the molecular mechanism of Dof transcription factors (TFs) for responding to abiotic stresses is rarely reported in plants. We identified a soybean Dof gene GmDof41 which was involved in the responses to drought, salt, and exogenous ABA stresses. Overexpression of GmDof41 in soybean transgenic hairy roots attenuated H2O2 accumulation and regulated proline homeostasis, resulting in the drought and salt tolerance. Yeast one-hybrid and electrophoretic mobility shift assay (EMSA) illustrated that GmDof41 was regulated by the DREB1-type protein GmDREB1B;1 that could improve drought and salt tolerance in plants. Further studies illustrated GmDof41 can directly bind to the promoter of GmDREB2A which encodes a DREB2-type protein and affects abiotic stress tolerance in plants. Collectively, our results suggested that GmDof41 positively regulated drought and salt tolerance by correlating with GmDREB1B;1 and GmDREB2A. This study provides an important basis for further exploring the abiotic stress-tolerance mechanism of Dof TFs in soybean.
Collapse
Affiliation(s)
- Ji-Tong Wei
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Shu-Ping Zhao
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Hui-Yuan Zhang
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Long-Guo Jin
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Tai-Fei Yu
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Lei Zheng
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Jian Ma
- College of Agronomy, Jilin Agricultural University, Changchun 130118, China
| | - Jun Chen
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Yong-Bin Zhou
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Ming Chen
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Jin-Dong Fu
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - You-Zhi Ma
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences/Hainan Yazhou Bay Seed Laboratory, Sanya 572024, China
| | - Zhao-Shi Xu
- National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops/Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products, Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China; College of Agronomy, Jilin Agricultural University, Changchun 130118, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences/Hainan Yazhou Bay Seed Laboratory, Sanya 572024, China.
| |
Collapse
|
8
|
Luo D, Liu J, Wu Y, Zhang X, Zhou Q, Fang L, Liu Z. NUCLEAR TRANSPORT FACTOR 2-LIKE improves drought tolerance by modulating leaf water loss in alfalfa (Medicago sativa L.). THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 112:429-450. [PMID: 36006043 DOI: 10.1111/tpj.15955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/14/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Drought is a major environmental factor that limits the production of alfalfa (Medicago sativa). In the present study, M. sativa NUCLEAR TRANSPORT FACTOR 2-LIKE (MsNTF2L) was identified as a nucleus-, cytoplasm-, and plasma membrane-localized protein. Its transcriptional expression was highly induced by ABA and drought stress. Overexpression of MsNTF2L in Arabidopsis resulted in hypersensitivity to ABA during both the seed germination and seedling growth stages. However, transgenic Arabidopsis plants exhibited enhanced tolerance to drought stress by reducing the levels of reactive oxygen species (ROS) and increasing the expression of stress/ABA-inducible genes. Consistently, analysis of MsNTF2L overexpression (OE) and RNA interference (RNAi) alfalfa plants revealed that MsNTF2L confers drought tolerance through promoting ROS scavenging, a decrease in stomatal density, ABA-induced stomatal closure, and epicuticular wax crystal accumulation. MsNTF2L highly affected epicuticular wax deposition, as a large group of wax biosynthesis and transport genes were influenced in the alfalfa OE and RNAi lines. Furthermore, transcript profiling of drought-treated alfalfa WT, OE, and RNAi plants showed a differential drought response for genes related to stress/ABA signaling, antioxidant defense, and photosynthesis. Taken together, these results reveal that MsNTF2L confers drought tolerance in alfalfa via modulation of leaf water loss (by regulating both stomata and wax deposition), antioxidant defense, and photosynthesis.
Collapse
Affiliation(s)
- Dong Luo
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
- Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Jie Liu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Yuguo Wu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Xi Zhang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Qiang Zhou
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Longfa Fang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Zhipeng Liu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| |
Collapse
|
9
|
Baoxiang W, Bo X, Yan L, Jingfang L, Zhiguang S, Ming C, Yungao X, Bo Y, Jian L, Jinbo L, Tingmu C, Zhaowei F, Baiguan L, Dayong X, Bello BK. A Novel mechanisms of the signaling cascade associated with the SAPK10-bZIP20-NHX1 synergistic interaction to enhance tolerance of plant to abiotic stress in rice (Oryza sativa L.). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 323:111393. [PMID: 35878697 DOI: 10.1016/j.plantsci.2022.111393] [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: 04/13/2022] [Revised: 07/11/2022] [Accepted: 07/17/2022] [Indexed: 06/15/2023]
Abstract
The bzip transcription factors can modulate the transcriptional expressions of target genes by binding specifically to cis-regulatory elements in the promoter region of stress-related genes, hence regulating plant stress resistance. Here, we investigated a stress-responsive transcription factor Osbzip20 under abiotic stresses. The OsbZIP20-GFP fusion protein predominantly aggregated in the nucleus, in accordance with our subcellular localization. OsbZIP20 transcript was observed in all vegetative tissues with highest levels being detected in the seed. Transcription of Osbzip20 was induced by salinity, exsiccation, and abscisic acid. Overexpression of OsbZIP20 in transgenic rice considerably improved tolerance to salt and drought stresses, as well as increased sensitivity to ABA. Furthermore, abiotic stress responsive genes transcript were found to be remarkably elevated in transgenic rice overexpressing OsbZIP20 than in wild-type plants. SAPK10 was discovered to directly interact with and phosphorylate OsbZIP20. Yeast one-hybrid and luciferase assay revealed that OsbZIP20 acted as a transcriptional stimulator. Interestingly, gel shift assay showed that phosphorylated bZIP20 augmented its DNA-binding affinity to the ABRE element of the NHX1 promoter and induced its transcription. In sum, our findings establish a novel signaling pathway associated with the SAPK10-bZIP20-NHX1 synergistic interaction, as well as a new strategy for enhancing rice drought and salt tolerance.
Collapse
Affiliation(s)
- Wang Baoxiang
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Xu Bo
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Liu Yan
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Li Jingfang
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Sun Zhiguang
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Chi Ming
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Xing Yungao
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Yang Bo
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Li Jian
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Liu Jinbo
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Chen Tingmu
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Fang Zhaowei
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Lu Baiguan
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China
| | - Xu Dayong
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China.
| | - Babatunde Kazeem Bello
- Lianyungang Institute of Agricultural Sciences, Collaborative Innovation Center for Modern Crop Production, Lianyungang, Jiangsu province 222006, China.
| |
Collapse
|
10
|
Temmerman A, Guillory A, Bonhomme S, Goormachtig S, Struk S. Masks Start to Drop: Suppressor of MAX2 1-Like Proteins Reveal Their Many Faces. FRONTIERS IN PLANT SCIENCE 2022; 13:887232. [PMID: 35645992 PMCID: PMC9133912 DOI: 10.3389/fpls.2022.887232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/25/2022] [Indexed: 05/11/2023]
Abstract
Although the main players of the strigolactone (SL) signaling pathway have been characterized genetically, how they regulate plant development is still poorly understood. Of central importance are the SUPPRESSOR OF MAX2 1-LIKE (SMXL) proteins that belong to a family of eight members in Arabidopsis thaliana, of which one subclade is involved in SL signaling and another one in the pathway of the chemically related karrikins. Through proteasomal degradation of these SMXLs, triggered by either DWARF14 (D14) or KARRIKIN INSENSITIVE2 (KAI2), several physiological processes are controlled, such as, among others, shoot and root architecture, seed germination, and seedling photomorphogenesis. Yet another clade has been shown to be involved in vascular development, independently of the D14 and KAI2 actions and not relying on proteasomal degradation. Despite their role in several aspects of plant development, the exact molecular mechanisms by which SMXLs regulate them are not completely unraveled. To fill the major knowledge gap in understanding D14 and KAI2 signaling, SMXLs are intensively studied, making it challenging to combine all the insights into a coherent characterization of these important proteins. To this end, this review provides an in-depth exploration of the recent data regarding their physiological function, evolution, structure, and molecular mechanism. In addition, we propose a selection of future perspectives, focusing on the apparent localization of SMXLs in subnuclear speckles, as observed in transient expression assays, which we couple to recent advances in the field of biomolecular condensates and liquid-liquid phase separation.
Collapse
Affiliation(s)
- Arne Temmerman
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB-Center for Plant Systems Biology, Ghent, Belgium
| | - Ambre Guillory
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), Versailles, France
- LIPME, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
| | - Sandrine Bonhomme
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), Versailles, France
| | - Sofie Goormachtig
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB-Center for Plant Systems Biology, Ghent, Belgium
| | - Sylwia Struk
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- VIB-Center for Plant Systems Biology, Ghent, Belgium
- *Correspondence: Sylwia Struk,
| |
Collapse
|
11
|
Li H, Testerink C, Zhang Y. How roots and shoots communicate through stressful times. TRENDS IN PLANT SCIENCE 2021; 26:940-952. [PMID: 33896687 DOI: 10.1016/j.tplants.2021.03.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 02/19/2021] [Accepted: 03/16/2021] [Indexed: 05/06/2023]
Abstract
When plants face an environmental stress such as water deficit, soil salinity, high temperature, or shade, good communication between above- and belowground organs is necessary to coordinate growth and development. Various signals including hormones, peptides, proteins, hydraulic signals, and metabolites are transported mostly through the vasculature to distant tissues. How shoots and roots synchronize their response to stress using mobile signals is an emerging field of research. We summarize recent advances on mobile signals regulating shoot stomatal movement and root development in response to highly localized environmental cues. In addition, we highlight how the vascular system is not only a conduit but is also flexible in its development in response to abiotic stress.
Collapse
Affiliation(s)
- Hongfei Li
- Laboratory of Plant Physiology, Plant Sciences Group, Wageningen University and Research, 6708PB Wageningen, The Netherlands
| | - Christa Testerink
- Laboratory of Plant Physiology, Plant Sciences Group, Wageningen University and Research, 6708PB Wageningen, The Netherlands.
| | - Yanxia Zhang
- Laboratory of Plant Physiology, Plant Sciences Group, Wageningen University and Research, 6708PB Wageningen, The Netherlands.
| |
Collapse
|
12
|
Wang T, Dong Q, Wang W, Chen S, Cheng Y, Tian H, Li X, Hussain S, Wang L, Gong L, Wang S. Evolution of AITR family genes in cotton and their functions in abiotic stress tolerance. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23 Suppl 1:58-68. [PMID: 33202099 DOI: 10.1111/plb.13218] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 11/11/2020] [Indexed: 05/18/2023]
Abstract
Abiotic stresses are major environmental factors inhibiting plant growth and development. AITRs (ABA-induced transcription repressors) are a novel family of transcription factors regulating ABA (abscisic acid) signalling and plant responses to abiotic stresses in Arabidopsis. However, the composition and evolution history of AITRs and their roles in the cotton genus are largely unknown. A total of 12 putative AITRs genes were identified in cultivated tetraploid cotton, Gossypium hirsutum. Phylogenetic analysis of GhAITRs in these tetraploid cottons and their closely related species implicate ancient genome-wide duplication occurring after speciation of Gossypium, and Theobroma could generate duplicates of GhAITRs. Duplicated GhAITRs were stably inherited following diploid speciation and further allotetraploidy in Gossypium. Homologous GhAITRs shared common expression patterns in response to ABA, drought and salinity treatments, and drought tolerance induced in transgenic Arabidopsis plants expressing GhAITR-A1. Together, our findings reveal that duplicates in the GhAITRs gene family were achieved by whole genome duplication rather than three individual duplication events, and that GhAITRs function as transcription repressors and are involved in the regulation of plant responses to ABA and drought stress. These results provide insights towards the improvement of abiotic stress tolerance in cotton using GhAITRs.
Collapse
Affiliation(s)
- T Wang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Q Dong
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - W Wang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - S Chen
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Y Cheng
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - H Tian
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - X Li
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - S Hussain
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - L Wang
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi, China
| | - L Gong
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - S Wang
- Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, China
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, Linyi, China
| |
Collapse
|
13
|
Wang Y, Wang M, Ye X, Liu H, Takano T, Tsugama D, Liu S, Bu Y. Biotin plays an important role in Arabidopsis thaliana seedlings under carbonate stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 300:110639. [PMID: 33180716 DOI: 10.1016/j.plantsci.2020.110639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/21/2020] [Accepted: 08/15/2020] [Indexed: 06/11/2023]
Abstract
Globally, many saline-alkali soils are rich in NaHCO3 and Na2CO3, which are characterized by a high pH Carbonate stress caused by this kind of soil severely damages plant cells and inhibits plant growth. Biotin and HCO3- participate in the first and rate-limiting reaction of the fatty acid biosynthesis pathway, but whether biotin contributes to plant responses to carbonate stress is unclear. In this study, we revealed that high carbonate and biotin concentrations inhibited Arabidopsis (Arabidopsis thaliana) seedling growth. However, specific concentrations of carbonate and biotin decreased the inhibitory effects of the other compound at the germination and seedling stages. Additionally, a carbonate treatment increased the endogenous biotin content and expression of AtBIO2, which encodes a biotin synthase. Moreover, phenotypic analyses indicated that the overexpression of AtBIO2 in Arabidopsis enhanced the tolerance to carbonate stress, whereas mutations to AtBIO2 had the opposite effect. Furthermore, the carbonate stress-induced accumulation of reactive oxygen species was lower in plants overexpressing AtBIO2 than in the wild-type and bio2 mutants. Accordingly, biotin, which is an essential vitamin for plants, can enhance the resistance to carbonate stress.
Collapse
Affiliation(s)
- Yao Wang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Min Wang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Xiaoxue Ye
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Hua Liu
- Department of Silviculture, State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang, 311300, China
| | - Tetsuo Takano
- Asian Natural Environmental Science Center (ANESC), University of Tokyo, Nishitokyo, Tokyo, 188-0002, Japan
| | - Daisuke Tsugama
- Asian Natural Environmental Science Center (ANESC), University of Tokyo, Nishitokyo, Tokyo, 188-0002, Japan
| | - Shenkui Liu
- Department of Silviculture, State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang, 311300, China.
| | - Yuanyuan Bu
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, 150040, China; College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| |
Collapse
|
14
|
Sun L, Di DW, Li G, Kronzucker HJ, Wu X, Shi W. Endogenous ABA alleviates rice ammonium toxicity by reducing ROS and free ammonium via regulation of the SAPK9-bZIP20 pathway. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:4562-4577. [PMID: 32064504 PMCID: PMC7475098 DOI: 10.1093/jxb/eraa076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 02/11/2020] [Indexed: 05/05/2023]
Abstract
Ammonium (NH4+) is one of the principal nitrogen (N) sources in soils, but is typically toxic already at intermediate concentrations. The phytohormone abscisic acid (ABA) plays a pivotal role in responses to environmental stresses. However, the role of ABA under high-NH4+ stress in rice (Oryza sativa L.) is only marginally understood. Here, we report that elevated NH4+ can significantly accelerate tissue ABA accumulation. Mutants with high (Osaba8ox) and low levels of ABA (Osphs3-1) exhibit elevated tolerance or sensitivity to high-NH4+ stress, respectively. Furthermore, ABA can decrease NH4+-induced oxidative damage and tissue NH4+ accumulation by enhancing antioxidant and glutamine synthetase (GS)/glutamate synthetasae (GOGAT) enzyme activities. Using RNA sequencing and quantitative real-time PCR approaches, we ascertain that two genes, OsSAPK9 and OsbZIP20, are induced both by high NH4+ and by ABA. Our data indicate that OsSAPK9 interacts with OsbZIP20, and can phosphorylate OsbZIP20 and activate its function. When OsSAPK9 or OsbZIP20 are knocked out in rice, ABA-mediated antioxidant and GS/GOGAT activity enhancement under high-NH4+ stress disappear, and the two mutants are more sensitive to high-NH4+ stress compared with their wild types. Taken together, our results suggest that ABA plays a positive role in regulating the OsSAPK9-OsbZIP20 pathway in rice to increase tolerance to high-NH4+ stress.
Collapse
Affiliation(s)
- Li Sun
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu, China
- State Key Lab of Crop Genetics and Germplasm Enhancement, Cytogenetics Institute, Nanjing Agricultural University/JCIC-MCP, Nanjing, Jiangsu, China
| | - Dong-Wei Di
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu, China
| | - Guangjie Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu, China
| | - Herbert J Kronzucker
- School of Agriculture and Food, University of Melbourne, Parkville, VIC, Australia
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, Canada
| | - Xiangyu Wu
- Key Lab of Plant-Soil Interaction, MOE, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Weiming Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu, China
| |
Collapse
|
15
|
Yang T, Lian Y, Kang J, Bian Z, Xuan L, Gao Z, Wang X, Deng J, Wang C. The SUPPRESSOR of MAX2 1 (SMAX1)-Like SMXL6, SMXL7 and SMXL8 Act as Negative Regulators in Response to Drought Stress in Arabidopsis. ACTA ACUST UNITED AC 2020; 61:1477-1492. [DOI: 10.1093/pcp/pcaa066] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 04/30/2020] [Indexed: 12/22/2022]
Abstract
Abstract
Drought represents a major threat to crop growth and yields. Strigolactones (SLs) contribute to regulating shoot branching by targeting the SUPPRESSOR OF MORE AXILLARY GROWTH2 (MAX2)-LIKE6 (SMXL6), SMXL7 and SMXL8 for degradation in a MAX2-dependent manner in Arabidopsis. Although SLs are implicated in plant drought response, the functions of the SMXL6, 7 and 8 in the SL-regulated plant response to drought stress have remained unclear. Here, we performed transcriptomic, physiological and biochemical analyses of smxl6, 7, 8 and max2 plants to understand the basis for SMXL6/7/8-regulated drought response. We found that three D53 (DWARF53)-Like SMXL members, SMXL6, 7 and 8, are involved in drought response as the smxl6smxl7smxl8 triple mutants showed markedly enhanced drought tolerance compared to wild type (WT). The smxl6smxl7smxl8 plants exhibited decreased leaf stomatal index, cuticular permeability and water loss, and increased anthocyanin biosynthesis during dehydration. Moreover, smxl6smxl7smxl8 were hypersensitive to ABA-induced stomatal closure and ABA responsiveness during and after germination. In addition, RNA-sequencing analysis of the leaves of the D53-like smxl mutants, SL-response max2 mutant and WT plants under normal and dehydration conditions revealed an SMXL6/7/8-mediated network controlling plant adaptation to drought stress via many stress- and/or ABA-responsive and SL-related genes. These data further provide evidence for crosstalk between ABA- and SL-dependent signaling pathways in regulating plant responses to drought. Our results demonstrate that SMXL6, 7 and 8 are vital components of SL signaling and are negatively involved in drought responses, suggesting that genetic manipulation of SMXL6/7/8-dependent SL signaling may provide novel ways to improve drought resistance.
Collapse
Affiliation(s)
- Tao Yang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yuke Lian
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jihong Kang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhiyuan Bian
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Lijuan Xuan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhensheng Gao
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xinyu Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jianming Deng
- State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Science, Lanzhou University, Lanzhou 730000, China
| | - Chongying Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
16
|
Yang T, Sun Y, Wang Y, Zhou L, Chen M, Bian Z, Lian Y, Xuan L, Yuan G, Wang X, Wang C. AtHSPR is involved in GA- and light intensity-mediated control of flowering time and seed set in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3543-3559. [PMID: 32157303 PMCID: PMC7475253 DOI: 10.1093/jxb/eraa128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 03/05/2020] [Indexed: 05/15/2023]
Abstract
Flowering is a dynamic and synchronized process, the timing of which is finely tuned by various environmental signals. A T-DNA insertion mutant in Arabidopsis HEAT SHOCK PROTEIN-RELATED (AtHSPR) exhibited late-flowering phenotypes under both long-day (LD) and short-day (SD) conditions compared to the wild-type, while over-expression of AtHSPR promoted flowering. Exogenous application of gibberellin (GA) partially rescued the late-flowering mutant phenotype under both LD and SD conditions, suggesting that AtHSPR is involved in GA biosynthesis and/or the GA signaling that promotes flowering. Under SD or low-light conditions, the Athspr mutant exhibited late flowering together with reduced pollen viability and seed set, defective phenotypes that were partially rescued by GA treatment. qRT-PCR assays confirmed that GA biosynthetic genes were down-regulated, that GA catabolic genes were up-regulated, and that the levels of bioactive GA and its intermediates were decreased in Athspr under both SD and low-light/LD, further suggesting that AtHSPR could be involved in the GA pathway under SD and low-light conditions. Furthermore, AtHSPR interacted in vitro with OFP1 and KNAT5, which are transcriptional repressors of GA20ox1 in GA biosynthesis. Taken together, our findings demonstrate that AtHSPR plays a positive role in GA- and light intensity-mediated regulation of flowering and seed set.
Collapse
Affiliation(s)
- Tao Yang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yan Sun
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yongli Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Lina Zhou
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Mengya Chen
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Zhiyuan Bian
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yuke Lian
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Lijuan Xuan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Guoqiang Yuan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xinyu Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | | |
Collapse
|
17
|
Wang J, Hou W, Christensen MJ, Xia C, Chen T, Zhang Z, Nan Z. The fungal endophyte Epichloë gansuensis increases NaCl-tolerance in Achnatherum inebrians through enhancing the activity of plasma membrane H +-ATPase and glucose-6-phosphate dehydrogenase. SCIENCE CHINA-LIFE SCIENCES 2020; 64:452-465. [PMID: 32430851 DOI: 10.1007/s11427-020-1674-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 03/08/2020] [Indexed: 12/13/2022]
Abstract
Salt stress negatively affects plant growth, and the fungal endophyte Epichloëgansuensis increases the tolerance of its host grass species, Achnatherum inebrians, to abiotic stresses. In this work, we first evaluated the effects of E. gansuensis on glucose-6-phosphate dehydrogenase (G6PDH) and plasma membrane (PM) H+-ATPase activity of Achnatherum inebrians plants under varying NaCl concentrations. Our results showed that the presence of E. gansuensis increased G6PDH, PM H+-ATPase, superoxide dismutase and catalase activity to decrease O2•-, H2O2 and Na+ contents in A. inebrians under NaCl stress, resulting in enhanced salt tolerance. In addition, the PM NADPH oxidase activity and NADPH/NADP+ ratios were all lower in A. inebrians with E. ganusensis plants than A. inebrians plants without this endophyte under NaCl stress. In conclusion, E. gansuensis has a positive role in improving host grass yield under NaCl stress by enhancing the activity of G6PDH and PM H+-ATPase to decrease ROS content. This provides a new way for the selection of stress-resistant and high-quality forage varieties by the use of systemic fungal endophytes.
Collapse
Affiliation(s)
- Jianfeng Wang
- State Key Laboratory of Grassland Agro-ecosystems; Center for Grassland Microbiome; Key Laboratory of Grassland Livestock Industry Innovation; Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry; Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Wenpeng Hou
- State Key Laboratory of Grassland Agro-ecosystems; Center for Grassland Microbiome; Key Laboratory of Grassland Livestock Industry Innovation; Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry; Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Michael J Christensen
- Retired scientist of AgResearch, Grasslands Research Centre, Private Bag 11-008, Palmerston North, 4442, New Zealand
| | - Chao Xia
- State Key Laboratory of Grassland Agro-ecosystems; Center for Grassland Microbiome; Key Laboratory of Grassland Livestock Industry Innovation; Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry; Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Tao Chen
- State Key Laboratory of Grassland Agro-ecosystems; Center for Grassland Microbiome; Key Laboratory of Grassland Livestock Industry Innovation; Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry; Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Zhixin Zhang
- College of Grassland Agriculture, Northwest A&F University, Yangling, 712100, China
| | - Zhibiao Nan
- State Key Laboratory of Grassland Agro-ecosystems; Center for Grassland Microbiome; Key Laboratory of Grassland Livestock Industry Innovation; Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry; Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730000, China.
| |
Collapse
|
18
|
López-Salmerón V, Cho H, Tonn N, Greb T. The Phloem as a Mediator of Plant Growth Plasticity. Curr Biol 2020; 29:R173-R181. [PMID: 30836090 DOI: 10.1016/j.cub.2019.01.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Developmental plasticity, defined as the capacity to respond to changing environmental conditions, is an inherent feature of plant growth. Recent studies have brought the phloem tissue, the quintessential conduit for energy metabolites and inter-organ communication, into focus as an instructive developmental system. Those studies have clarified long-standing questions about essential aspects of phloem development and function, such as the pressure flow hypothesis, mechanisms of phloem unloading, and source-sink relationships. Interestingly, plants with impaired phloem development show characteristic changes in body architecture, thereby highlighting the capacity of the phloem to integrate environmental cues and to fine-tune plant development. Therefore, understanding the plasticity of phloem development provides scenarios of how environmental stimuli are translated into differential plant growth. In this Review, we summarize novel insights into how phloem identity is established and how phloem cells fulfil their core function as transport units. Moreover, we discuss possible interfaces between phloem physiology and development as sites for mediating the plastic growth mode of plants.
Collapse
Affiliation(s)
- Vadir López-Salmerón
- Centre for Organismal Studies (COS), Heidelberg University, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Hyunwoo Cho
- Centre for Organismal Studies (COS), Heidelberg University, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Nina Tonn
- Centre for Organismal Studies (COS), Heidelberg University, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Thomas Greb
- Centre for Organismal Studies (COS), Heidelberg University, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany.
| |
Collapse
|
19
|
Rowarth NM, Dauphinee AN, Denbigh GL, Gunawardena AH. Hsp70 plays a role in programmed cell death during the remodelling of leaves of the lace plant (Aponogeton madagascariensis). JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:907-918. [PMID: 31691798 DOI: 10.1093/jxb/erz447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/23/2019] [Indexed: 05/07/2023]
Abstract
Lace plant leaves utilize programmed cell death (PCD) to form perforations during development. The role of heat shock proteins (Hsps) in PCD during lace plant leaf development is currently unknown. Hsp70 amounts were measured throughout lace plant leaf development, and the results indicate that it is highest before and during PCD. Increased Hsp70 amounts correlate with raised anthocyanin content and caspase-like protease (CLP) activity. To investigate the effects of Hsp70 on leaf development, whole plants were treated with either of the known regulators of PCD [reactive oxygen species (ROS) or antioxidants] or an Hsp70 inhibitor, chlorophenylethynylsulfonamide (PES-Cl). ROS treatment significantly increased Hsp70 2-fold and CLP activity in early developing leaves, but no change in anthocyanin and the number of perforations formed was observed. Antioxidant treatment significantly decreased Hsp70, anthocyanin, and CLP activity in early leaves, resulting in the fewest perforations. PES-Cl (25 μM) treatment significantly increased Hsp70 4-fold in early leaves, while anthocyanin, superoxide, and CLP activity significantly declined, leading to fewer perforations. Results show that significantly increased (4-fold) or decreased Hsp70 amounts lead to lower anthocyanin and CLP activity, inhibiting PCD induction. Our data support the hypothesis that Hsp70 plays a role in regulating PCD at a threshold in lace plant leaf development. Hsp70 affects anthocyanin content and caspase-like protease activity, and helps regulate PCD during the remodelling of leaves of lace plant, Aponogeton madagascariensis.
Collapse
Affiliation(s)
- Nathan M Rowarth
- Department of Biology, Dalhousie University, Halifax, NS, Canada
| | - Adrian N Dauphinee
- Department of Molecular Sciences, Uppsala BioCenter, Linnean Centre for Plant Biology, Swedish University of Agricultural Sciences, Uppsala, SE, Sweden
| | | | | |
Collapse
|
20
|
Liu M, Liao H, Peng S. Salt-tolerant native plants have greater responses to other environments when compared to salt-tolerant invasive plants. Ecol Evol 2019; 9:7808-7818. [PMID: 31346442 PMCID: PMC6635938 DOI: 10.1002/ece3.5368] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Accepted: 05/24/2019] [Indexed: 11/09/2022] Open
Abstract
The strong expansion potential of invasive plants is often attributed to fast adaptive responses to stress. However, the evolution of tolerance to one stressor may affect the responses to other stressors. Currently, it remains unclear what effect the evolution to one stressor might have on the responses to other single or combined stressors. Moreover, it is unknown how this might differ between invasive and native species.Invasive plants (Mikania micrantha and Bidens pilosa) and native plants (Merremia hederacea and Sida acuta) from low- and high-salinity habitats were grown under control and stressful conditions [salt stress, water stress (drought/waterlogging), and their combinations]. We explored the effects of evolved salt tolerance on the responses to water stress/combined stresses and the underlying trait mechanisms.The high-salinity populations of all species exhibited stronger salt tolerance than the low-salinity populations. As to the tolerance to other stressors, the high-salinity and low-salinity populations of the invasive species were similar, whereas the high-salinity populations of the native species exhibited stronger tolerance than the low-salinity populations under most stress treatments. However, the enhanced salt tolerance in native species was accompanied by reduced total biomass under control condition. The stress tolerance of native species correlated with leaf production rate and allocation to root, while the performance of native species under control condition correlated with leaf morphology and carbon assimilation rate. This suggests a trade-off between salt tolerance and performance in the native but not the invasive species, probably resulting from altered phenotypic/physiological traits. SYNTHESIS Our work suggests that the evolution of tolerance to one stressor may have stronger effects on the tolerance to other stressors of the native compared with the invasive species. This may be a new paradigm to explain the greater advantage of invasive vs. native species in highly stressful habitats.
Collapse
Affiliation(s)
- Muxin Liu
- State Key Laboratory of Biocontrol School of Life Sciences Sun Yat-sen University Guangzhou China
| | - Huixuan Liao
- State Key Laboratory of Biocontrol School of Life Sciences Sun Yat-sen University Guangzhou China
| | - Shaolin Peng
- State Key Laboratory of Biocontrol School of Life Sciences Sun Yat-sen University Guangzhou China
| |
Collapse
|
21
|
Yang L, Wang X, Chang N, Nan W, Wang S, Ruan M, Sun L, Li S, Bi Y. Cytosolic Glucose-6-Phosphate Dehydrogenase Is Involved in Seed Germination and Root Growth Under Salinity in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2019; 10:182. [PMID: 30873191 PMCID: PMC6401624 DOI: 10.3389/fpls.2019.00182] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 02/05/2019] [Indexed: 05/27/2023]
Abstract
Glucose-6-phosphate dehydrogenase (G6PDH or G6PD) is the key regulatory enzyme in the oxidative pentose phosphate pathway (OPPP). The cytosolic isoforms including G6PD5 and G6PD6 account for the major part of the G6PD total activity in plant cells. Here, we characterized the Arabidopsis single null mutant g6pd5 and g6pd6 and double mutant g6pd5/6. Compared to wild type, the mutant seeds showed a reduced germination rate and root elongation under salt stress. The seeds and seedlings lacking G6PD5 and G6PD6 accumulate more reactive oxygen species (ROS) than the wild type under salt stress. Cytosolic G6PD (cy-G6PD) affected the expression of NADPH oxidases and the G6PD enzymatic activities in the mutant atrbohD/F, in which the NADPH oxidases genes are disrupted by T-DNA insertion and generation of ROS is inhibited, were lower than that in the wild type. The NADPH level in mutants was decreased under salt stress. In addition, we found that G6PD5 and G6PD6 affected the activities and transcript levels of various antioxidant enzymes in response to salt stress, especially the ascorbate peroxidase and glutathione reductase. Exogenous application of ascorbate acid and glutathione rescued the seed and root phenotype of g6pd5/6 under salt stress. Interestingly, the cytosolic G6PD negatively modulated the NaCl-blocked primary root growth under salt stress in the root meristem and elongation zone.
Collapse
Affiliation(s)
- Lei Yang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xiaomin Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Ning Chang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Wenbin Nan
- Chongqing Key Laboratory of Molecular Biology of Plant Environmental Adaptations, College of Life Sciences, Chongqing Normal University, Chongqing, China
| | - Shengwang Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Mengjiao Ruan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Lili Sun
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Sufang Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Yurong Bi
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| |
Collapse
|
22
|
Yang L, Wang S, Sun L, Ruan M, Li S, He R, Zhang W, Liang C, Wang X, Bi Y. Involvement of G6PD5 in ABA response during seed germination and root growth in Arabidopsis. BMC PLANT BIOLOGY 2019; 19:44. [PMID: 30700259 PMCID: PMC6354342 DOI: 10.1186/s12870-019-1647-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 01/11/2019] [Indexed: 05/15/2023]
Abstract
BACKGROUND Glucose-6-phosphate dehydrogenase (G6PDH or G6PD) functions in supply of NADPH, which is required for plant defense responses to stresses. However, whether G6PD functions in the abscisic acid (ABA) signaling pathway remains to be elucidated. In this study, we investigated the involvement of the cytosolic G6PD5 in the ABA signaling pathway in Arabidopsis. RESULTS We characterized the Arabidopsis single null mutant g6pd5. Phenotypic analysis showed that the mutant is more sensitive to ABA during seed germination and root growth, whereas G6PD5-overexpressing plants are less sensitive to ABA compared to wild type (WT). Furthermore, ABA induces excessive accumulation of reactive oxygen species (ROS) in mutant seeds and seedlings. G6PD5 participates in the reduction of H2O2 to H2O in the ascorbate-glutathione cycle. In addition, we found that G6PD5 suppressed the expression of Abscisic Acid Insensitive 5 (ABI5), the major ABA signaling component in dormancy control. When G6PD5 was overexpressed, the ABA signaling pathway was inactivated. Consistently, G6PD5 negatively modulates ABA-blocked primary root growth in the meristem and elongation zones. Of note, the suppression of root elongation by ABA is triggered by the cell cycle B-type cyclin CYCB1. CONCLUSIONS This study showed that G6PD5 is involved in the ABA-mediated seed germination and root growth by suppressing ABI5.
Collapse
Affiliation(s)
- Lei Yang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Shengwang Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Lili Sun
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Mengjiao Ruan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Sufang Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Rui He
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Wenya Zhang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Cuifang Liang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| | - Xiaomin Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai 810016 People’s Republic of China
| | - Yurong Bi
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000 People’s Republic of China
| |
Collapse
|
23
|
Xiang J, Zhou X, Zhang X, Liu A, Xiang Y, Yan M, Peng Y, Chen X. The Arabidopsis AtUNC-93 Acts as a Positive Regulator of Abiotic Stress Tolerance and Plant Growth via Modulation of ABA Signaling and K + Homeostasis. FRONTIERS IN PLANT SCIENCE 2018; 9:718. [PMID: 29899751 PMCID: PMC5989354 DOI: 10.3389/fpls.2018.00718] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 05/11/2018] [Indexed: 05/29/2023]
Abstract
Potassium (K+) is one of the essential macronutrients required for plant growth and development, and the maintenance of cellular K+ homeostasis is important for plants to adapt to abiotic stresses and growth. However, the mechanism involved has not been understood clearly. In this study, we demonstrated that AtUNC-93 plays a crucial role in this process under the control of abscisic acid (ABA). AtUNC-93 was localized to the plasma membrane and mainly expressed in the vascular tissues in Arabidopsis thaliana. The atunc-93 mutants showed typical K+-deficient symptoms under low-K+ conditions. The K+ contents of atunc-93 mutants were significantly reduced in shoots but not in roots under either low-K+ or normal conditions compared with wild type plants, whereas the AtUNC-93-overexpressing lines still maintained relatively higher K+ contents in shoots under low-K+ conditions, suggesting that AtUNC-93 positively regulates K+ translocation from roots to shoots. The atunc-93 plants exhibited dwarf phenotypes due to reduced cell expansion, while AtUNC-93-overexpressing plants had larger bodies because of increased cell expansion. After abiotic stress and ABA treatments, the atunc-93 mutants was more sensitive to salt, drought, osmotic, heat stress and ABA than wild type plants, while the AtUNC-93-overexpressing lines showed enhanced tolerance to these stresses and insensitive phenotype to ABA. Furthermore, alterations in the AtUNC-93 expression changed expression of many ABA-responsive and stress-related genes. Our findings reveal that AtUNC-93 functions as a positive regulator of abiotic stress tolerance and plant growth by maintaining K+ homeostasis through ABA signaling pathway in Arabidopsis.
Collapse
Affiliation(s)
- Jianhua Xiang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
- Institute of Ecological Landscape Restoration, Hunan University of Science and Technology, Xiangtan, China
| | - Xiaoyun Zhou
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Xianwen Zhang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Ailing Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Yanci Xiang
- Institute of Ecological Landscape Restoration, Hunan University of Science and Technology, Xiangtan, China
| | - Mingli Yan
- School of Life Sciences, Hunan University of Science and Technology, Xiangtan, China
| | - Yan Peng
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Xinbo Chen
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| |
Collapse
|
24
|
Tian H, Chen S, Yang W, Wang T, Zheng K, Wang Y, Cheng Y, Zhang N, Liu S, Li D, Liu B, Wang S. A novel family of transcription factors conserved in angiosperms is required for ABA signalling. PLANT, CELL & ENVIRONMENT 2017; 40:2958-2971. [PMID: 28857190 DOI: 10.1111/pce.13058] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 08/19/2017] [Accepted: 08/21/2017] [Indexed: 05/18/2023]
Abstract
The plant hormone abscisic acid (ABA) plays a crucial role in regulating plant responses to environmental stresses. Interplay of several different proteins including the PYR/PYL/RCAR receptors, A-group PP2C protein phosphatases, SnRK2 protein kinases, and downstream transcription factors regulates ABA signalling. We report here the identification of a family of ABA-induced transcription repressors (AITRs) that act as feedback regulators in ABA signalling. We found that the expression of all the 6 Arabidopsis AITR genes was induced by exogenously ABA, and their expression levels were decreased in ABA biosynthesis mutant aba1-5. BLAST searches showed that AITRs are exclusively present in angiosperms. When recruited to the promoter region of a reporter gene by a fused DNA binding domain, all AITRs inhibited reporter gene expression in transfected protoplasts. In Arabidopsis, aitr mutants showed reduced sensitivity to ABA and to stresses such as salt and drought. Quantitative RT-PCR analysis demonstrated that the ABA-induced response of PP2C and some PYR/PYL/RCAR genes was reduced in AITR5 transgenic plants but increased in an aitr2 aitr5 aitr6 triple mutant. These results provide important new insights into the regulation of ABA signalling in plants, and such information may lead to the production of plants with enhanced resistance to environmental stresses.
Collapse
Affiliation(s)
- Hainan Tian
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Siyu Chen
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Wenting Yang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Tianya Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Kaijie Zheng
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Yating Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Yuxin Cheng
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Na Zhang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Shanda Liu
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Dongqiu Li
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Bao Liu
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| | - Shucai Wang
- Key Laboratory of Molecular Epigenetics of MOE, Northeast Normal University, Changchun, Jilin, 130024, China
| |
Collapse
|
25
|
Zhao Y, Tian X, Wang F, Zhang L, Xin M, Hu Z, Yao Y, Ni Z, Sun Q, Peng H. Characterization of wheat MYB genes responsive to high temperatures. BMC PLANT BIOLOGY 2017; 17:208. [PMID: 29157199 PMCID: PMC5696766 DOI: 10.1186/s12870-017-1158-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 11/08/2017] [Indexed: 05/20/2023]
Abstract
BACKGROUND Heat stress is one of the most crucial environmental factors, which reduces crop yield worldwide. In plants, the MYB family is one of the largest families of transcription factors (TFs). Although some wheat stress-related MYB TFs have been characterized, their involvement in response to high-temperature stress has not been properly studied. RESULTS Six novel heat-induced MYB genes were identified by comparison with previously established de novo transcriptome sequencing data obtained from wheat plants subjected to heat treatment; genomic and complete coding sequences of these genes were isolated. All six TaMYBs were localized in the nucleus of wheat protoplasts. Transactivation assays in yeast revealed that all six proteins acted as transcriptional activators, and the activation domains were attributed to the C-termini of the six wheat MYB proteins. Phylogenetic analysis of the six TaMYBs and R2R3-MYBs from Arabidopsis revealed that all six proteins were in clades that contained stress-related MYB TFs. The expression profiles of TaMYB genes were different in wheat tissues and in response to various abiotic stresses and exogenous abscisic acid treatment. In transgenic Arabidopsis plants carrying TaMYB80 driven by the CaMV 35S promoter, tolerance to heat and drought stresses increased, which could be attributed to the increased levels of cellular abscisic acid. CONCLUSIONS We identified six heat-induced MYB genes in wheat. We performed comprehensive analyses of the cloned MYB genes and their gene products, including gene structures, subcellular localization, transcriptional activation, phylogenetic relationships, and expression patterns in different wheat tissues and under various abiotic stresses. In particular, we showed that TaMYB80 conferred heat and drought tolerance in transgenic Arabidopsis. These results contribute to our understanding of the functions of heat-induced MYB genes and provide the basis for selecting the best candidates for in-depth functional studies of heat-responsive MYB genes in wheat.
Collapse
Affiliation(s)
- Yue Zhao
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Xuejun Tian
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Fei Wang
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Liyuan Zhang
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Mingming Xin
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Zhaorong Hu
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Yingyin Yao
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Zhongfu Ni
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Qixin Sun
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Huiru Peng
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193 People’s Republic of China
| |
Collapse
|
26
|
Végh A, Incze N, Fábián A, Huo H, Bradford KJ, Balázs E, Soós V. Comprehensive Analysis of DWARF14-LIKE2 (DLK2) Reveals Its Functional Divergence from Strigolactone-Related Paralogs. FRONTIERS IN PLANT SCIENCE 2017; 8:1641. [PMID: 28970845 PMCID: PMC5609103 DOI: 10.3389/fpls.2017.01641] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 09/06/2017] [Indexed: 05/20/2023]
Abstract
Strigolactones (SLs) and related butenolides, originally identified as active seed germination stimulants of parasitic weeds, play important roles in many aspects of plant development. Two members of the D14 α/β hydrolase protein family, DWARF14 (D14) and KARRIKIN INSENSITIVE2 (KAI2) are essential for SL/butenolide signaling. The third member of the family in Arabidopsis, DWARF 14-LIKE2 (DLK2) is structurally very similar to D14 and KAI2, but its function is unknown. We demonstrated that DLK2 does not bind nor hydrolyze natural (+)5-deoxystrigol [(+)5DS], and weakly hydrolyzes non-natural strigolactone (-)5DS. A detailed genetic analysis revealed that DLK2 does not affect SL responses and can regulate seedling photomorphogenesis. DLK2 is upregulated in the dark dependent upon KAI2 and PHYTOCHROME INTERACTING FACTORS (PIFs), indicating that DLK2 might function in light signaling pathways. In addition, unlike its paralog proteins, DLK2 is not subject to rac-GR24-induced degradation, suggesting that DLK2 acts independently of MORE AXILLARY GROWTH2 (MAX2); however, regulation of DLK2 transcription is mostly accomplished through MAX2. In conclusion, these data suggest that DLK2 represents a divergent member of the DWARF14 family.
Collapse
Affiliation(s)
- Attila Végh
- Department of Applied Genomics, Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of SciencesMartonvasar, Hungary
| | - Norbert Incze
- Department of Applied Genomics, Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of SciencesMartonvasar, Hungary
| | - Attila Fábián
- Department of Plant Cell Biology, Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of SciencesMartonvasar, Hungary
| | - Heqiang Huo
- Department of Plant Sciences, Seed Biotechnology Center, University of California, Davis, DavisCA, United States
| | - Kent J. Bradford
- Department of Plant Sciences, Seed Biotechnology Center, University of California, Davis, DavisCA, United States
| | - Ervin Balázs
- Department of Applied Genomics, Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of SciencesMartonvasar, Hungary
| | - Vilmos Soós
- Department of Applied Genomics, Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of SciencesMartonvasar, Hungary
| |
Collapse
|
27
|
Strigolactone- and Karrikin-Independent SMXL Proteins Are Central Regulators of Phloem Formation. Curr Biol 2017; 27:1241-1247. [PMID: 28392107 PMCID: PMC5405109 DOI: 10.1016/j.cub.2017.03.014] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/01/2017] [Accepted: 03/08/2017] [Indexed: 11/25/2022]
Abstract
Plant stem cell niches, the meristems, require long-distance transport of energy metabolites and signaling molecules along the phloem tissue. However, currently it is unclear how specification of phloem cells is controlled. Here we show that the genes SUPPRESSOR OF MAX2 1-LIKE3 (SMXL3), SMXL4, and SMXL5 act as cell-autonomous key regulators of phloem formation in Arabidopsis thaliana. The three genes form an uncharacterized subclade of the SMXL gene family that mediates hormonal strigolactone and karrikin signaling. Strigolactones are endogenous signaling molecules regulating shoot and root branching [1] whereas exogenous karrikin molecules induce germination after wildfires [2]. Both activities depend on the F-box protein and SCF (Skp, Cullin, F-box) complex component MORE AXILLARY GROWTH2 (MAX2) [3, 4, 5]. Strigolactone and karrikin perception leads to MAX2-dependent degradation of distinct SMXL protein family members, which is key for mediating hormonal effects [6, 7, 8, 9, 10, 11, 12]. However, the nature of events immediately downstream of SMXL protein degradation and whether all SMXL proteins mediate strigolactone or karrikin signaling is unknown. In this study we demonstrate that, within the SMXL gene family, specifically SMXL3/4/5 deficiency results in strong defects in phloem formation, altered sugar accumulation, and seedling lethality. By comparing protein stabilities, we show that SMXL3/4/5 proteins function differently to canonical strigolactone and karrikin signaling mediators, although being functionally interchangeable with those under low strigolactone/karrikin signaling conditions. Our observations reveal a fundamental mechanism of phloem formation and indicate that diversity of SMXL protein functions is essential for a steady fuelling of plant meristems. SMXL3/4/5 genes act as general promoters of phloem formation SMXL3/4/5 proteins are expressed and function very early during phloem development SMXL3/4/5 proteins do not mediate strigolactone or karrikin signaling Strigolactone/karrkin-dependent SMXL proteins are able to replace SMXL5
Collapse
|
28
|
Overexpression of Poplar Pyrabactin Resistance-Like Abscisic Acid Receptors Promotes Abscisic Acid Sensitivity and Drought Resistance in Transgenic Arabidopsis. PLoS One 2016; 11:e0168040. [PMID: 27992471 PMCID: PMC5167274 DOI: 10.1371/journal.pone.0168040] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 11/23/2016] [Indexed: 11/19/2022] Open
Abstract
Drought stress is an important environmental factor limiting productivity of plants, especially fast growing species with high water consumption like poplar. Abscisic acid (ABA) is a phytohormone that positively regulates seed dormancy and drought resistance. The PYR1 (Pyrabactin Resistance 1)/ PYRL (PYR-Like)/ RCAR (Regulatory Component of ABA Receptor) (PYR/PYL/RCAR) ABA receptor family has been identified and widely characterized in Arabidopsis thaliana. However, their functions in poplars remain unknown. Here, we report that 2 of 14 PYR/PYL/RCAR orthologues in poplar (Populus trichocarpa) (PtPYRLs) function as a positive regulator of the ABA signal transduction pathway. The Arabidopsis transient expression and yeast two-hybrid assays showed the interaction among PtPYRL1 and PtPYRL5, a clade A protein phosphatase 2C, and a SnRK2, suggesting that a core signalling complex for ABA signaling pathway exists in poplars. Phenotypic analysis of PtPYRL1 and PtPYRL5 transgenic Arabidopsis showed that these two genes positively regulated the ABA responses during the seed germination. More importantly, the overexpression of PtPYRL1 and PtPYRL5 substantially improved ABA sensitivity and drought stress tolerance in transgenic plants. In summary, we comprehensively uncovered the properties of PtPYRL1 and PtPYRL5, which might be good target genes to genetically engineer drought-Resistant plants.
Collapse
|
29
|
Khosla A, Nelson DC. Strigolactones, super hormones in the fight against Striga. CURRENT OPINION IN PLANT BIOLOGY 2016; 33:57-63. [PMID: 27318656 DOI: 10.1016/j.pbi.2016.06.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/27/2016] [Accepted: 06/01/2016] [Indexed: 05/18/2023]
Abstract
Strigolactones are plant hormones that control diverse aspects of plant growth, but are also exuded into soil as recruitment signals for arbuscular mycorrhizal fungi interactions. Highly damaging parasitic weeds in the Orobanchaceae family have coopted strigolactones as germination cues that indicate the presence of a host. Recent studies have established how strigolactones are actively transported within and out of plants. Key components of the strigolactone signaling system have been identified, including strigolactone receptors in angiosperms and parasites, as well as downstream targets that are polyubiquitinated and proteolyzed following strigolactone perception. The basis for protein-protein interactions among these signaling components has also been explored. We propose several strategies to translate current knowledge of strigolactone transport and signaling into parasite control methods.
Collapse
Affiliation(s)
- Aashima Khosla
- Department of Genetics, University of Georgia, Athens, GA 30602, USA
| | - David C Nelson
- Department of Genetics, University of Georgia, Athens, GA 30602, USA.
| |
Collapse
|
30
|
Yang T, Zhang P, Wang C. AtHSPR may function in salt-induced cell death and ER stress in Arabidopsis. PLANT SIGNALING & BEHAVIOR 2016; 11:e1197462. [PMID: 27302034 PMCID: PMC4991323 DOI: 10.1080/15592324.2016.1197462] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Salt stress is a harmful and global abiotic stress to plants and has an adverse effect on all physiological processes of plants. Recently, we cloned and identified a novel AtHSPR (Arabidopsis thaliana Heat Shock Protein Related), which encodes a nuclear-localized protein with ATPase activity, participates in salt and drought tolerance in Arabidopsis. Transcript profiling analysis revealed a differential expression of genes involved in accumulation of reactive oxygen species (ROS), abscisic acid (ABA) signaling, stress response and photosynthesis between athspr mutant and WT under salt stress. Here, we provide further analysis of the data showing the regulation of salt-induced cell death and endoplasmic reticulum (ER) stress response in Arabidopsis and propose a hypothetical model for the role of AtHSPR in the regulation of the salt tolerance in Arabidopsis.
Collapse
Affiliation(s)
- Tao Yang
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Peng Zhang
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Chongying Wang
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, China
- CONTACT Chongying Wang Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, China
| |
Collapse
|
31
|
Sun X, Sun M, Jia B, Qin Z, Yang K, Chen C, Yu Q, Zhu Y. A Glycine soja methionine sulfoxide reductase B5a interacts with the Ca(2+) /CAM-binding kinase GsCBRLK and activates ROS signaling under carbonate alkaline stress. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 86:514-529. [PMID: 27121031 DOI: 10.1111/tpj.13187] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 04/04/2016] [Accepted: 04/06/2016] [Indexed: 06/05/2023]
Abstract
Although research has extensively illustrated the molecular basis of plant responses to salt and high-pH stresses, knowledge on carbonate alkaline stress is poor and the specific responsive mechanism remains elusive. We have previously characterized a Glycine soja Ca(2+) /CAM-dependent kinase GsCBRLK that could increase salt tolerance. Here, we characterize a methionine sulfoxide reductase (MSR) B protein GsMSRB5a as a GsCBRLK interactor by using Y2H and BiFc assays. Further analyses showed that the N-terminal variable domain of GsCBRLK contributed to the GsMSRB5a interaction. Y2H assays also revealed the interaction specificity of GsCBRLK with the wild soybean MSRB subfamily proteins, and determined that the BoxI/BoxII-containing regions within GsMSRBs were responsible for their interaction. Furthermore, we also illustrated that the N-terminal basic regions in GsMSRBs functioned as transit peptides, which targeted themselves into chloroplasts and thereby prevented their interaction with GsCBRLK. Nevertheless, deletion of these regions allowed them to localize on the plasma membrane (PM) and interact with GsCBRLK. In addition, we also showed that GsMSRB5a and GsCBRLK displayed overlapping tissue expression specificity and coincident expression patterns under carbonate alkaline stress. Phenotypic experiments demonstrated that GsMSRB5a and GsCBRLK overexpression in Arabidopsis enhanced carbonate alkaline stress tolerance. Further investigations elucidated that GsMSRB5a and GsCBRLK inhibited reactive oxygen species (ROS) accumulation by modifying the expression of ROS signaling, biosynthesis and scavenging genes. Summarily, our results demonstrated that GsCBRLK and GsMSRB5a interacted with each other, and activated ROS signaling under carbonate alkaline stress.
Collapse
Affiliation(s)
- Xiaoli Sun
- Crop Stress Molecular Biology Laboratory, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Mingzhe Sun
- Crop Stress Molecular Biology Laboratory, Heilongjiang Bayi Agricultural University, Daqing, China
- Plant Bioengineering Laboratory, Northeast Agricultural University, Harbin, China
| | - Bowei Jia
- Crop Stress Molecular Biology Laboratory, Heilongjiang Bayi Agricultural University, Daqing, China
- Plant Bioengineering Laboratory, Northeast Agricultural University, Harbin, China
| | - Zhiwei Qin
- Crop Stress Molecular Biology Laboratory, Heilongjiang Bayi Agricultural University, Daqing, China
- Plant Bioengineering Laboratory, Northeast Agricultural University, Harbin, China
| | - Kejun Yang
- Crop Stress Molecular Biology Laboratory, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Chao Chen
- Plant Bioengineering Laboratory, Northeast Agricultural University, Harbin, China
| | - Qingyue Yu
- Plant Bioengineering Laboratory, Northeast Agricultural University, Harbin, China
| | - Yanming Zhu
- Crop Stress Molecular Biology Laboratory, Heilongjiang Bayi Agricultural University, Daqing, China
- Plant Bioengineering Laboratory, Northeast Agricultural University, Harbin, China
| |
Collapse
|