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Zhang C, Wang H, Tian X, Lin X, Han Y, Han Z, Sha H, Liu J, Liu J, Zhang J, Bu Q, Fang J. A transposon insertion in the promoter of OsUBC12 enhances cold tolerance during japonica rice germination. Nat Commun 2024; 15:2211. [PMID: 38480722 PMCID: PMC10937917 DOI: 10.1038/s41467-024-46420-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 02/27/2024] [Indexed: 03/17/2024] Open
Abstract
Low-temperature germination (LTG) is an important agronomic trait for rice (Oryza sativa). Japonica rice generally has greater capacity for germination at low temperatures than the indica subpopulation. However, the genetic basis and molecular mechanisms underlying this complex trait are poorly understood. Here, we report that OsUBC12, encoding an E2 ubiquitin-conjugating enzyme, increases low-temperature germinability in japonica, owing to a transposon insertion in its promoter enhancing its expression. Natural variation analysis reveals that transposon insertion in the OsUBC12 promoter mainly occurs in the japonica lineage. The variation detected in eight representative two-line male sterile lines suggests the existence of this allele introgression by indica-japonica hybridization breeding, and varieties carrying the japonica OsUBC12 locus (transposon insertion) have higher low-temperature germinability than varieties without the locus. Further molecular analysis shows that OsUBC12 negatively regulate ABA signaling. OsUBC12-regulated seed germination and ABA signaling mainly depend on a conserved active site required for ubiquitin-conjugating enzyme activity. Furthermore, OsUBC12 directly associates with rice SUCROSE NON-FERMENTING 1-RELATED PROTEIN KINASE 1.1 (OsSnRK1.1), promoting its degradation. OsSnRK1.1 inhibits LTG by enhancing ABA signaling and acts downstream of OsUBC12. These findings shed light on the underlying mechanisms of UBC12 regulating LTG and provide genetic reference points for improving LTG in indica rice.
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Affiliation(s)
- Chuanzhong Zhang
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, 150030, China
| | - Hongru Wang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Xiaojie Tian
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
| | - Xinyan Lin
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
- Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping, Jilin Province, 136000, China
| | - Yunfei Han
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
| | - Zhongmin Han
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
| | - Hanjing Sha
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
| | - Jia Liu
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
| | - Jianfeng Liu
- Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping, Jilin Province, 136000, China
| | - Jian Zhang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China
| | - Qingyun Bu
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China
| | - Jun Fang
- Key Laboratory of Soybean Molecular Design Breeding, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 150081, Harbin, China.
- Yazhouwan National Laboratory, Sanya, 572024, China.
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Yang YY, An XH, Rui L, Liu GD, Tian Y, You CX, Wang XF. MdSnRK1.1 interacts with MdGLK1 to regulate abscisic acid-mediated chlorophyll accumulation in apple. HORTICULTURE RESEARCH 2024; 11:uhad288. [PMID: 38371633 PMCID: PMC10873579 DOI: 10.1093/hr/uhad288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 12/17/2023] [Indexed: 02/20/2024]
Abstract
Abscisic acid (ABA), as a plant hormone, plays a positive role in leaf chlorosis; however, the underlying molecular mechanism is less known. Our findings provide ABA treatment reduced the chlorophyll accumulation in apple, and Malus × domestica Sucrose Non-fermenting 1-Related Protein Kinase 1.1 (MdSnRK1.1) participates in the process. MdSnRK1.1 interacts with MdGLK1, a GOLDEN2-like transcription factor that orchestrates development of the chloroplast. Furthermore, MdSnRK1.1 affects MdGLK1 protein stability through phosphorylation. We found that Ser468 of MdGLK1 is target site of MdSnRK1.1 phosphorylation. MdSnRK1.1-mediated phosphorylation was critical for MdGLK1 binding to the target gene MdHEMA1 promoters. Collectively, our results demonstrate that ABA activates MdSnRK1.1 to degrade MdGLK1 and inhibit the accumulation of chlorophyll. These findings extend our understanding on how MdSnRK1.1 balances normal growth and hormone response.
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Affiliation(s)
- Yu-Ying Yang
- State Key Laboratory of Crop Biology, Apple Technology Innovation Center of Shandong Province, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An 271018, Shandong, China
- Key Laboratory of Chinese Herbal Medicine Biology and Cultivation, Ministry of Agriculture and Rural Affairs, Institute of Chinese Herbal Medicine, Hubei Academy of Agricultral Science, Enshi 445000, China
| | - Xiu-Hong An
- National Engineering Research Center for Agriculture in Northern Mountainous Areas, Agricultural Technology Innovation Center in Mountainous Areas of Hebei Province, Hebei Agricultural University, Baoding 071000, Hebei, China
| | - Lin Rui
- State Key Laboratory of Crop Biology, Apple Technology Innovation Center of Shandong Province, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An 271018, Shandong, China
| | - Guo-Dong Liu
- State Key Laboratory of Crop Biology, Apple Technology Innovation Center of Shandong Province, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An 271018, Shandong, China
| | - Yi Tian
- National Engineering Research Center for Agriculture in Northern Mountainous Areas, Agricultural Technology Innovation Center in Mountainous Areas of Hebei Province, Hebei Agricultural University, Baoding 071000, Hebei, China
| | - Chun-Xiang You
- State Key Laboratory of Crop Biology, Apple Technology Innovation Center of Shandong Province, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An 271018, Shandong, China
| | - Xiao-Fei Wang
- State Key Laboratory of Crop Biology, Apple Technology Innovation Center of Shandong Province, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An 271018, Shandong, China
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3
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Transcriptomic insights into the effects of abscisic acid on the germination of Magnolia sieboldii K. Koch seed. Gene 2023; 853:147066. [PMID: 36455787 DOI: 10.1016/j.gene.2022.147066] [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: 08/12/2022] [Revised: 11/07/2022] [Accepted: 11/18/2022] [Indexed: 11/30/2022]
Abstract
Magnolia sieboldii K. Koch is a deciduous tree species. However, the wild resource of M. sieboldii has been declining due to excessive utilization and seed dormancy. In our previous research, M. sieboldii seeds have morphophysiological dormancy and low germination rates under natural conditions. The aim of the present study was to identify the genes involved in dormancy maintenance. In this study, the germination percentage of M. sieboldii seeds negatively correlated with the content of endogenous abscisic acid (ABA). The hydration of seeds for germination showed three distinct phases. Five key time points were identified: 0 h imbibition (dry seed, GZ), 0 day after imbibition (DAI), 16 DAI, 40 DAI, and 56 DAI. The comprehensive transcript profiles of M. sieboldii seeds treated with ABA and water at the five key germinating stages were obtained. A total of 9641 differentially expressed genes (DEGs) were identified, and 208 and 197 common DEGs were found throughout the ABA and water treatments, respectively. Compared with that in the GZ, 518, 696, 2133, and 1535 DEGs were identified in the SH group at 0, 16, 40 and 56 DAI, respectively. 666, 1725, 1560 and 1415 DEGs were identified in the ABA group at 0, 16, 40, and 56 DAI, respectively. Among the identified DEGs, 12 722 were annotated with GO terms, the top three enriched GO terms were different among the DEGs at 56 DAI in the ABA vs. SH treatments. KEGG pathway enrichment analysis for DEGs indicated that oxidative phosphorylation, protein processing in endoplasmic reticulum, starch and sucrose metabolism play an important role in seed response to ABA. 1926 TFs are obtained and classified into 72 families from the M. sieboldii transcriptome. Results of differential gene expression analysis together with qRT-PCR indicated that phase II is crucial for rapid and successful seed germination. This study is the first to present the global expression patterns of ABA-regulated transcripts in M. sieboldii seeds at different germinating phases.
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Peixoto B, Baena-González E. Management of plant central metabolism by SnRK1 protein kinases. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:7068-7082. [PMID: 35708960 PMCID: PMC9664233 DOI: 10.1093/jxb/erac261] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 06/14/2022] [Indexed: 05/07/2023]
Abstract
SUCROSE NON-FERMENTING1 (SNF1)-RELATED KINASE 1 (SnRK1) is an evolutionarily conserved protein kinase with key roles in plant stress responses. SnRK1 is activated when energy levels decline during stress, reconfiguring metabolism and gene expression to favour catabolism over anabolism, and ultimately to restore energy balance and homeostasis. The capacity to efficiently redistribute resources is crucial to cope with adverse environmental conditions and, accordingly, genetic manipulations that increase SnRK1 activity are generally associated with enhanced tolerance to stress. In addition to its well-established function in stress responses, an increasing number of studies implicate SnRK1 in the homeostatic control of metabolism during the regular day-night cycle and in different organs and developmental stages. Here, we review how the genetic manipulation of SnRK1 alters central metabolism in several plant species and tissue types. We complement this with studies that provide mechanistic insight into how SnRK1 modulates metabolism, identifying changes in transcripts of metabolic components, altered enzyme activities, or direct regulation of enzymes or transcription factors by SnRK1 via phosphorylation. We identify patterns of response that centre on the maintenance of sucrose levels, in an analogous manner to the role described for its mammalian orthologue in the control of blood glucose homeostasis. Finally, we highlight several knowledge gaps and technical limitations that will have to be addressed in future research aiming to fully understand how SnRK1 modulates metabolism at the cellular and whole-plant levels.
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Affiliation(s)
- Bruno Peixoto
- Instituto Gulbenkian de Ciência, Oeiras, Portugal and GREEN-IT Bioresources for Sustainability, ITQB NOVA, Oeiras, Portugal
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Elango D, Wang W, Thudi M, Sebastiar S, Ramadoss BR, Varshney RK. Genome-wide association mapping of seed oligosaccharides in chickpea. FRONTIERS IN PLANT SCIENCE 2022; 13:1024543. [PMID: 36352859 PMCID: PMC9638045 DOI: 10.3389/fpls.2022.1024543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Chickpea (Cicer arietinum L.) is one of the major pulse crops, rich in protein, and widely consumed all over the world. Most legumes, including chickpeas, possess noticeable amounts of raffinose family oligosaccharides (RFOs) in their seeds. RFOs are seed oligosaccharides abundant in nature, which are non-digestible by humans and animals and cause flatulence and severe abdominal discomforts. So, this study aims to identify genetic factors associated with seed oligosaccharides in chickpea using the mini-core panel. We have quantified the RFOs (raffinose and stachyose), ciceritol, and sucrose contents in chickpea using high-performance liquid chromatography. A wide range of variations for the seed oligosaccharides was observed between the accessions: 0.16 to 15.13 mg g-1 raffinose, 2.77 to 59.43 mg g-1 stachyose, 4.36 to 90.65 mg g-1 ciceritol, and 3.57 to 54.12 mg g-1 for sucrose. Kabuli types showed desirable sugar profiles with high sucrose, whereas desi types had high concentrations RFOs. In total, 48 single nucleotide polymorphisms (SNPs) were identified for all the targeted sugar types, and nine genes (Ca_06204, Ca_04353, and Ca_20828: Phosphatidylinositol N-acetylglucosaminyltransferase; Ca_17399 and Ca_22050: Remorin proteins; Ca_11152: Protein-serine/threonine phosphatase; Ca_10185, Ca_14209, and Ca_27229: UDP-glucose dehydrogenase) were identified as potential candidate genes for sugar metabolism and transport in chickpea. The accessions with low RFOs and high sucrose contents may be utilized in breeding specialty chickpeas. The identified candidate genes could be exploited in marker-assisted breeding, genomic selection, and genetic engineering to improve the sugar profiles in legumes and other crop species.
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Affiliation(s)
- Dinakaran Elango
- Department of Agronomy, Iowa State University, Ames, IA, United States
- Department of Plant Science, Penn State University, University Park, PA, United States
| | - Wanyan Wang
- Ecosystem Science and Management, Penn State University, University Park, PA, United States
| | - Mahender Thudi
- Department of Agricultural Biotechnology and Molecular Biology, Dr. Rajendra Prasad Central Agricultural University, Samastipur, India
- Centre for Crop Health, University of Southern Queensland (USQ), Toowoomba, QLD, Australia
- Genetics Gains Research Program, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
| | - Sheelamary Sebastiar
- Division of Crop Improvement, Indian Council of Agricultural Research (ICAR)-Sugarcane Breeding Institute, Coimbatore, India
| | - Bharathi Raja Ramadoss
- Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, Saskatoon, SK, Canada
| | - Rajeev K. Varshney
- Genetics Gains Research Program, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India
- State Agricultural Biotechnology Centre, Crop Research Innovation Centre, Food Futures Institute, Murdoch University, Murdoch, WA, Australia
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Sathee L, Sairam RK, Chinnusamy V, Jha SK, Singh D. Upregulation of genes encoding plastidic isoforms of antioxidant enzymes and osmolyte synthesis impart tissue tolerance to salinity stress in bread wheat. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2022; 28:1639-1655. [PMID: 36387974 PMCID: PMC9636341 DOI: 10.1007/s12298-022-01237-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/22/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Wheat genotype Kharchia is a donor for salt tolerance in wheat breeding programs worldwide; however, the tolerance mechanism in Kharchia is yet to be deciphered completely. To avoid spending energy on accumulating organic osmolytes and to conserve resources for maintaining growth, plants deploy sodium (Na+) ions to maintain turgor. The enhanced ability to tolerate excess ion accumulation and ion toxicity is designated as tissue tolerance. In this study, salt-tolerant wheat genotype (Kharchia 65) and sensitive cultivars (HD2687, HD2009, WL711) were exposed to vegetative stage salinity stress (for four weeks). Kharchia 65 showed better tissue tolerance to salinity than the other genotypes based on different physiological parameters. Gene expression and abundance of chloroplast localized antioxidant enzymes and compatible osmolyte synthesis were upregulated by salinity in Kharchia 65. In Kharchia 65, the higher abundance of NADPH Oxidase (RBOH) transcripts and localization of reactive oxygen species (ROS) suggested an apoplastic ROS burst. Expression of calcium signaling genes of SOS pathway, MAPK6, bZIP6 and NAC4 were also upregulated by salinity in Kharchia 65. Considering that Kharchia local is the donor of salt tolerance trait in Kharchia 65, the publically available Kharchia local transcriptome data were analyzed. Our results and the in-silico transcriptome analysis also confirmed that higher basal levels and the stress-induced rise in the expression of plastidic isoforms of antioxidant enzymes and osmolyte biosynthesis genes provide tissue tolerance in Kharchia 65. Thus, in salinity tolerant genotype Kharchia 65, ROS burst mediated triggering of calcium signaling improves Na+ exclusion and tissue tolerance to Na+. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-022-01237-w.
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Affiliation(s)
- Lekshmy Sathee
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Raj K. Sairam
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Viswanathan Chinnusamy
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Shailendra K. Jha
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Dalveer Singh
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
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Mandal S, Ghorai M, Anand U, Samanta D, Kant N, Mishra T, Rahman MH, Jha NK, Jha SK, Lal MK, Tiwari RK, Kumar M, Radha, Prasanth DA, Mane AB, Gopalakrishnan AV, Biswas P, Proćków J, Dey A. Cytokinin and abiotic stress tolerance -What has been accomplished and the way forward? Front Genet 2022; 13:943025. [PMID: 36017502 PMCID: PMC9395584 DOI: 10.3389/fgene.2022.943025] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/30/2022] [Indexed: 11/27/2022] Open
Abstract
More than a half-century has passed since it was discovered that phytohormone cytokinin (CK) is essential to drive cytokinesis and proliferation in plant tissue culture. Thereafter, cytokinin has emerged as the primary regulator of the plant cell cycle and numerous developmental processes. Lately, a growing body of evidence suggests that cytokinin has a role in mitigating both abiotic and biotic stress. Cytokinin is essential to defend plants against excessive light exposure and a unique kind of abiotic stress generated by an altered photoperiod. Secondly, cytokinin also exhibits multi-stress resilience under changing environments. Furthermore, cytokinin homeostasis is also affected by several forms of stress. Therefore, the diverse roles of cytokinin in reaction to stress, as well as its interactions with other hormones, are discussed in detail. When it comes to agriculture, understanding the functioning processes of cytokinins under changing environmental conditions can assist in utilizing the phytohormone, to increase productivity. Through this review, we briefly describe the biological role of cytokinin in enhancing the performance of plants growth under abiotic challenges as well as the probable mechanisms underpinning cytokinin-induced stress tolerance. In addition, the article lays forth a strategy for using biotechnological tools to modify genes in the cytokinin pathway to engineer abiotic stress tolerance in plants. The information presented here will assist in better understanding the function of cytokinin in plants and their effective investigation in the cropping system.
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Affiliation(s)
- Sayanti Mandal
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Mimosa Ghorai
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India
| | - Uttpal Anand
- CytoGene Research & Development LLP, Barabanki, Uttar Pradesh, India
| | - Dipu Samanta
- Department of Botany, Dr. Kanailal Bhattacharyya College, Howrah, West Bengal, India
| | - Nishi Kant
- School of Health and Allied Science, ARKA Jain University, Jamshedpur, Jharkhand, India
| | - Tulika Mishra
- Department of Botany, Deen Dayal Upadhyay Gorakhpur University, Gorakhpur, Uttar Pradesh, India
| | - Md. Habibur Rahman
- Department of Global Medical Science, Wonju College of Medicine, Yonsei University, Wonju, Gangwon-do, South Korea
| | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Biotechnology Engineering and Food Technology, Chandigarh University, Mohali, India
- Department of Biotechnology, School of Applied and Life Sciences (SALS), Uttaranchal University, Dehradun, India
| | - Saurabh Kumar Jha
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Biotechnology Engineering and Food Technology, Chandigarh University, Mohali, India
- Department of Biotechnology, School of Applied and Life Sciences (SALS), Uttaranchal University, Dehradun, India
| | - Milan Kumar Lal
- Division of Crop Physiology, Biochemistry and Post Harvest Technology, ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
| | - Rahul Kumar Tiwari
- Division of Crop Physiology, Biochemistry and Post Harvest Technology, ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
| | - Manoj Kumar
- Chemical and Biochemical Processing Division, ICAR-Central Institute for Research on Cotton Technology, Mumbai, Maharashtra, India
| | - Radha
- School of Biological and Environmental Sciences, Shoolini University of Biotechnology and Management Sciences, Solan, Himachal Pradesh, India
| | | | - Abhijit Bhagwan Mane
- Department of Zoology, Dr. Patangrao Kadam Mahavidhyalaya (affiliated to Shivaji University Kolhapur), Ramanandnagar (Burli), Sangli, Maharashtra, India
| | - Abilash Valsala Gopalakrishnan
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, India
| | - Protha Biswas
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India
| | - Jarosław Proćków
- Department of Plant Biology, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India
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Wingler A, Henriques R. Sugars and the speed of life-Metabolic signals that determine plant growth, development and death. PHYSIOLOGIA PLANTARUM 2022; 174:e13656. [PMID: 35243645 PMCID: PMC9314607 DOI: 10.1111/ppl.13656] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/24/2022] [Accepted: 03/01/2022] [Indexed: 05/27/2023]
Abstract
Plant growth and development depend on the availability of carbohydrates synthesised in photosynthesis (source activity) and utilisation of these carbohydrates for growth (sink activity). External conditions, such as temperature, nutrient availability and stress, can affect source as well as sink activity. Optimal utilisation of resources is under circadian clock control. This molecular timekeeper ensures that growth responses are adjusted to different photoperiod and temperature settings by modulating starch accumulation and degradation accordingly. For example, during the night, starch degradation is required to provide sugars for growth. Under favourable growth conditions, high sugar availability stimulates growth and development, resulting in an overall accelerated life cycle of annual plants. Key signalling components include trehalose-6-phosphate (Tre6P), which reflects sucrose availability and stimulates growth and branching when the conditions are favourable. Under sink limitation, Tre6P does, however, inhibit night-time starch degradation. Tre6P interacts with Sucrose-non-fermenting1-Related Kinase1 (SnRK1), a protein kinase that inhibits growth under starvation and stress conditions and delays development (including flowering and senescence). Tre6P inhibits SnRK1 activity, but SnRK1 increases the Tre6P to sucrose ratio under favourable conditions. Alongside Tre6P, Target of Rapamycin (TOR) stimulates processes such as protein synthesis and growth when sugar availability is high. In annual plants, an accelerated life cycle results in early leaf and plant senescence, thus shortening the lifespan. While the availability of carbohydrates in the form of sucrose and other sugars also plays an important role in seasonal life cycle events (phenology) of perennial plants, the sugar signalling pathways in perennials are less well understood.
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Affiliation(s)
- Astrid Wingler
- School of Biological, Earth & Environmental Sciences and Environmental Research InstituteUniversity College Cork, Distillery FieldsCork
| | - Rossana Henriques
- School of Biological, Earth & Environmental Sciences and Environmental Research InstituteUniversity College Cork, Distillery FieldsCork
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Ahmad M, Waraich EA, Skalicky M, Hussain S, Zulfiqar U, Anjum MZ, Habib ur Rahman M, Brestic M, Ratnasekera D, Lamilla-Tamayo L, Al-Ashkar I, EL Sabagh A. Adaptation Strategies to Improve the Resistance of Oilseed Crops to Heat Stress Under a Changing Climate: An Overview. FRONTIERS IN PLANT SCIENCE 2021; 12:767150. [PMID: 34975951 PMCID: PMC8714756 DOI: 10.3389/fpls.2021.767150] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/11/2021] [Indexed: 05/16/2023]
Abstract
Temperature is one of the decisive environmental factors that is projected to increase by 1. 5°C over the next two decades due to climate change that may affect various agronomic characteristics, such as biomass production, phenology and physiology, and yield-contributing traits in oilseed crops. Oilseed crops such as soybean, sunflower, canola, peanut, cottonseed, coconut, palm oil, sesame, safflower, olive etc., are widely grown. Specific importance is the vulnerability of oil synthesis in these crops against the rise in climatic temperature, threatening the stability of yield and quality. The natural defense system in these crops cannot withstand the harmful impacts of heat stress, thus causing a considerable loss in seed and oil yield. Therefore, a proper understanding of underlying mechanisms of genotype-environment interactions that could affect oil synthesis pathways is a prime requirement in developing stable cultivars. Heat stress tolerance is a complex quantitative trait controlled by many genes and is challenging to study and characterize. However, heat tolerance studies to date have pointed to several sophisticated mechanisms to deal with the stress of high temperatures, including hormonal signaling pathways for sensing heat stimuli and acquiring tolerance to heat stress, maintaining membrane integrity, production of heat shock proteins (HSPs), removal of reactive oxygen species (ROS), assembly of antioxidants, accumulation of compatible solutes, modified gene expression to enable changes, intelligent agricultural technologies, and several other agronomic techniques for thriving and surviving. Manipulation of multiple genes responsible for thermo-tolerance and exploring their high expressions greatly impacts their potential application using CRISPR/Cas genome editing and OMICS technology. This review highlights the latest outcomes on the response and tolerance to heat stress at the cellular, organelle, and whole plant levels describing numerous approaches applied to enhance thermos-tolerance in oilseed crops. We are attempting to critically analyze the scattered existing approaches to temperature tolerance used in oilseeds as a whole, work toward extending studies into the field, and provide researchers and related parties with useful information to streamline their breeding programs so that they can seek new avenues and develop guidelines that will greatly enhance ongoing efforts to establish heat stress tolerance in oilseeds.
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Affiliation(s)
- Muhammad Ahmad
- Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
- Horticultural Sciences Department, Tropical Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Homestead, FL, United States
| | | | - Milan Skalicky
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
| | - Saddam Hussain
- Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
| | - Usman Zulfiqar
- Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Zohaib Anjum
- Department of Forestry and Range Management, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Habib ur Rahman
- Department of Agronomy, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan
- Crop Science Group, Institute of Crop Science and Resource Conservation (INRES), University Bonn, Bonn, Germany
| | - Marian Brestic
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovakia
| | - Disna Ratnasekera
- Department of Agricultural Biology, Faculty of Agriculture, University of Ruhuna, Kamburupitiya, Sri Lanka
| | - Laura Lamilla-Tamayo
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
| | - Ibrahim Al-Ashkar
- Department of Plant Production, College of Food and Agriculture, King Saud University, Riyadh, Saudi Arabia
- Agronomy Department, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
| | - Ayman EL Sabagh
- Department of Field Crops, Faculty of Agriculture, Siirt University, Siirt, Turkey
- Department of Agronomy, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Shaikh, Egypt
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10
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Fàbregas N, Fernie AR. The interface of central metabolism with hormone signaling in plants. Curr Biol 2021; 31:R1535-R1548. [PMID: 34875246 DOI: 10.1016/j.cub.2021.09.070] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Amongst the myriad of metabolites produced by plants, primary metabolites and hormones play crucial housekeeping roles in the cell and are essential for proper plant growth and development. While the biosynthetic pathways of primary metabolism are well characterized, those of hormones are yet to be completely defined. Central metabolism provides precursors for hormone biosynthesis and the regulation and function of primary metabolites and hormones are tightly entwined. The combination of reverse genetics and technological advances in our ability to evaluate the levels of the molecular entities of the cell (transcripts, proteins and metabolites) has led to considerable improvements in our understanding of both the regulatory interaction between primary metabolites and hormones and its coordination in response to different conditions. Here, we provide an overview of the interaction of primary and hormone metabolism at the metabolic and signaling levels, as well as a perspective regarding the tools that can be used to tackle our current knowledge gaps at the signaling level.
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Affiliation(s)
- Norma Fàbregas
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany.
| | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany.
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11
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Peixoto B, Moraes TA, Mengin V, Margalha L, Vicente R, Feil R, Höhne M, Sousa AGG, Lilue J, Stitt M, Lunn JE, Baena-González E. Impact of the SnRK1 protein kinase on sucrose homeostasis and the transcriptome during the diel cycle. PLANT PHYSIOLOGY 2021; 187:1357-1373. [PMID: 34618060 PMCID: PMC8566312 DOI: 10.1093/plphys/kiab350] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 07/09/2021] [Indexed: 05/04/2023]
Abstract
SNF1-related Kinase 1 (SnRK1) is an evolutionarily conserved protein kinase with key functions in energy management during stress responses in plants. To address a potential role of SnRK1 under favorable conditions, we performed a metabolomic and transcriptomic characterization of rosettes of 20-d-old Arabidopsis (Arabidopsis thaliana) plants of SnRK1 gain- and loss-of-function mutants during the regular diel cycle. Our results show that SnRK1 manipulation alters the sucrose and trehalose 6-phosphate (Tre6P) relationship, influencing how the sucrose content is translated into Tre6P accumulation and modulating the flux of carbon to the tricarboxylic acid cycle downstream of Tre6P signaling. On the other hand, daily cycles of Tre6P accumulation were accompanied by changes in SnRK1 signaling, leading to a maximum in the expression of SnRK1-induced genes at the end of the night, when Tre6P levels are lowest, and to a minimum at the end of the day, when Tre6P levels peak. The expression of SnRK1-induced genes was strongly reduced by transient Tre6P accumulation in an inducible Tre6P synthase (otsA) line, further suggesting the involvement of Tre6P in the diel oscillations in SnRK1 signaling. Transcriptional profiling of wild-type plants and SnRK1 mutants also uncovered defects that are suggestive of an iron sufficiency response and of a matching induction of sulfur acquisition and assimilation when SnRK1 is depleted. In conclusion, under favorable growth conditions, SnRK1 plays a role in sucrose homeostasis and transcriptome remodeling in autotrophic tissues and its activity is influenced by diel fluctuations in Tre6P levels.
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Affiliation(s)
- Bruno Peixoto
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal and GREEN-IT Bioresources for Sustainability, ITQB NOVA, 2780-157 Oeiras, Portugal
| | - Thiago A Moraes
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- Present address: Crop Science Centre, Lawrence Weaver Road, Cambridge CB3 0LE, UK
| | - Virginie Mengin
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- Present address: University of Essex, School of Life Sciences, Wivenhoe Park, Colchester CO4 3SQ, UK
| | - Leonor Margalha
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal and GREEN-IT Bioresources for Sustainability, ITQB NOVA, 2780-157 Oeiras, Portugal
| | - Rubén Vicente
- GREEN-IT Bioresources for Sustainability, ITQB NOVA, 2780-157 Oeiras, Portugal
| | - Regina Feil
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Melanie Höhne
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - António G G Sousa
- Instituto Gulbenkian de Ciência, Bioinformatics Unit, 2780-156 Oeiras, Portugal
| | - Jingtao Lilue
- Instituto Gulbenkian de Ciência, Bioinformatics Unit, 2780-156 Oeiras, Portugal
| | - Mark Stitt
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - John E Lunn
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Elena Baena-González
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal and GREEN-IT Bioresources for Sustainability, ITQB NOVA, 2780-157 Oeiras, Portugal
- Author for communication:
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12
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Malovichko YV, Shikov AE, Nizhnikov AA, Antonets KS. Temporal Control of Seed Development in Dicots: Molecular Bases, Ecological Impact and Possible Evolutionary Ramifications. Int J Mol Sci 2021; 22:ijms22179252. [PMID: 34502157 PMCID: PMC8430901 DOI: 10.3390/ijms22179252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 12/21/2022] Open
Abstract
In flowering plants, seeds serve as organs of both propagation and dispersal. The developing seed passes through several consecutive stages, following a conserved general outline. The overall time needed for a seed to develop, however, may vary both within and between plant species, and these temporal developmental properties remain poorly understood. In the present paper, we summarize the existing data for seed development alterations in dicot plants. For genetic mutations, the reported cases were grouped in respect of the key processes distorted in the mutant specimens. Similar phenotypes arising from the environmental influence, either biotic or abiotic, were also considered. Based on these data, we suggest several general trends of timing alterations and how respective mechanisms might add to the ecological plasticity of the families considered. We also propose that the developmental timing alterations may be perceived as an evolutionary substrate for heterochronic events. Given the current lack of plausible models describing timing control in plant seeds, the presented suggestions might provide certain insights for future studies in this field.
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Affiliation(s)
- Yury V. Malovichko
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), 196608 St. Petersburg, Russia; (Y.V.M.); (A.E.S.); (A.A.N.)
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Anton E. Shikov
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), 196608 St. Petersburg, Russia; (Y.V.M.); (A.E.S.); (A.A.N.)
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Anton A. Nizhnikov
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), 196608 St. Petersburg, Russia; (Y.V.M.); (A.E.S.); (A.A.N.)
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Kirill S. Antonets
- Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), 196608 St. Petersburg, Russia; (Y.V.M.); (A.E.S.); (A.A.N.)
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia
- Correspondence:
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13
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De Coninck T, Gistelinck K, Janse van Rensburg HC, Van den Ende W, Van Damme EJM. Sweet Modifications Modulate Plant Development. Biomolecules 2021; 11:756. [PMID: 34070047 PMCID: PMC8158104 DOI: 10.3390/biom11050756] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 04/28/2021] [Accepted: 05/12/2021] [Indexed: 02/07/2023] Open
Abstract
Plant development represents a continuous process in which the plant undergoes morphological, (epi)genetic and metabolic changes. Starting from pollination, seed maturation and germination, the plant continues to grow and develops specialized organs to survive, thrive and generate offspring. The development of plants and the interplay with its environment are highly linked to glycosylation of proteins and lipids as well as metabolism and signaling of sugars. Although the involvement of these protein modifications and sugars is well-studied, there is still a long road ahead to profoundly comprehend their nature, significance, importance for plant development and the interplay with stress responses. This review, approached from the plants' perspective, aims to focus on some key findings highlighting the importance of glycosylation and sugar signaling for plant development.
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Affiliation(s)
- Tibo De Coninck
- Laboratory of Glycobiology & Biochemistry, Department of Biotechnology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; (T.D.C.); (K.G.)
| | - Koen Gistelinck
- Laboratory of Glycobiology & Biochemistry, Department of Biotechnology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; (T.D.C.); (K.G.)
| | - Henry C. Janse van Rensburg
- Laboratory of Molecular Plant Biology, Department of Biology, KU Leuven, Kasteelpark Arenberg 31, B-3001 Leuven, Belgium; (H.C.J.v.R.); (W.V.d.E.)
| | - Wim Van den Ende
- Laboratory of Molecular Plant Biology, Department of Biology, KU Leuven, Kasteelpark Arenberg 31, B-3001 Leuven, Belgium; (H.C.J.v.R.); (W.V.d.E.)
| | - Els J. M. Van Damme
- Laboratory of Glycobiology & Biochemistry, Department of Biotechnology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; (T.D.C.); (K.G.)
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14
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Zhang S, Wang H, Luo J, Yu W, Xiao Y, Peng F. Peach PpSnRK1α interacts with bZIP11 and maintains trehalose balance in plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 160:377-385. [PMID: 33550178 DOI: 10.1016/j.plaphy.2021.01.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
The nonreducing disaccharide trehalose is widespread in nature. It plays a very important role in plant growth and development. In plants, trehalose is present in trace amounts. High concentration of trehalose disrupts energy balance and inhibits normal growth and development. Studies have shown that high levels of trehalose and trehalose-6-phosphate (T6P), the metabolic precursor of trehalose, inhibit sucrose non-fermenting-1-related protein kinase1 (SnRK1) activity, which affect plant growth and development. However, the role of SnRK1, the energy balance center, in the regulation of trehalose metabolism in plants is unknown. In this study, exogenous trehalose at higher concentrations inhibited the expression of SnRK1 genes, especially PpSnRK1α in peach (Prunus persica) seedlings. This change in gene expression was dependent on trehalose concentration. Furthermore, overexpression of peach PpSnRK1α in Arabidopsis thaliana significantly promoted trehalase activity, reduced T6P content, and suppressed the trehalose synthesis related genes (TPSs, TPPB) expression, promoted the trehalose metabolism of gene expression (TRE1), in addition the transgenic plants alleviated photosynthetic product distribution imbalance (aboveground and underground parts), and enhanced root growth. Yeast two-hybrid and bimolecular fluorescence assays revealed the interaction between PpSnRK1α and peach basic domain leucine zipper transcription factor 11 (PpbZIP11), a key transcription factor of trehalose metabolism, in the nucleus. To summarize, PpSnRK1α overexpression improved bZIP11 transcriptional activity and regulated trehalose metabolism to protect the plants against trehalose-induced damage. This study preliminarily explained the mechanism of SnRK1 regulating trehalose metabolism balance in plants, which laid a foundation for further understanding of energy metabolism and function of SnRK1 in plants.
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Affiliation(s)
- Shuhui Zhang
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Hui Wang
- College of Horticulture, Northwest A & F University, Yang Ling, Shaanxi, 712100, China
| | - Jingjing Luo
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Wenying Yu
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Yuansong Xiao
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China.
| | - Futian Peng
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China.
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15
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Guo J, Cao K, Yao JL, Deng C, Li Y, Zhu G, Fang W, Chen C, Wang X, Wu J, Guo W, Wang L. Reduced expression of a subunit gene of sucrose non-fermenting 1 related kinase, PpSnRK1βγ, confers flat fruit abortion in peach by regulating sugar and starch metabolism. BMC PLANT BIOLOGY 2021; 21:88. [PMID: 33568056 PMCID: PMC7877075 DOI: 10.1186/s12870-021-02850-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 01/21/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Fruit abortion is a major limiting factor for fruit production. In flat peach, fruit abortion is present in the whole tree of some accessions during early fruit development. However, the physiological factors and genetic mechanism underlying flat fruit abortion remain largely elusive. RESULTS In this study, we have revealed that the fertilization process was accomplished and the reduction of sucrose and starch contents might result in flat fruit abortion. By combining association and gene expression analysis, a key candidate gene, PpSnRK1βγ, was identified. A 1.67-Mb inversion co-segregated with flat fruit shape altered the promoter activity of PpSnRK1βγ, resulting in much lower expression in aborting flat peach. Ectopic transformation in tomato and transient overexpression in peach fruit have shown that PpSnRK1βγ could increase sugar and starch contents. Comparative transcriptome analysis further confirmed that PpSnRK1βγ participated in carbohydrate metabolism. Subcellular localization found that PpSnRK1βγ was located in nucleus. CONCLUSIONS This study provides a possible reason for flat fruit abortion and identified a critical candidate gene, PpSnRK1βγ, that might be responsible for flat fruit abortion in peach. The results will provide great help in peach breeding and facilitate gene identification for fruit abortion in other plant species.
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Affiliation(s)
- Jian Guo
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
- College of Horticulture & Forestry Sciences, Huazhong Agricultural University, Wuhan, China
| | - Ke Cao
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Jia-Long Yao
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 92169, Auckland, 1142, New Zealand
| | - Cecilia Deng
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 92169, Auckland, 1142, New Zealand
| | - Yong Li
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Gengrui Zhu
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Weichao Fang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Changwen Chen
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Xinwei Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Jinlong Wu
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China
| | - Wenwu Guo
- College of Horticulture & Forestry Sciences, Huazhong Agricultural University, Wuhan, China.
| | - Lirong Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, China.
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16
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The Rice Small Auxin-Up RNA Gene OsSAUR33 Regulates Seed Vigor via Sugar Pathway during Early Seed Germination. Int J Mol Sci 2021; 22:ijms22041562. [PMID: 33557166 PMCID: PMC7913900 DOI: 10.3390/ijms22041562] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 11/16/2022] Open
Abstract
Seed vigor affects seed germination and seedling emergence, and therefore is an important agronomic trait in rice. Small auxin-up RNAs (SAURs) function in a range of developmental processes, but their role in seed vigor remains unclear. Here, we observed that disruption of OsSAUR33 resulted in reduced germination rates and low seed uniformity in early germination. Expression of OsSAUR33 was higher in mature grains and early germinating seeds. RNA-seq analysis revealed that OsSAUR33 modulated seed vigor by affecting the mobilization of stored reserves during germination. Disruption of OsSAUR33 increased the soluble sugar content in dry mature grains and seeds during early germination. OsSAUR33 interacted with the sucrose non-fermenting-1-related protein kinase OsSnRK1A, a regulator of the sugar signaling pathway, which influences the expression of sugar signaling-related genes during germination. Disruption of OsSAUR33 increased sugar-sensitive phenotypes in early germination, suggesting OsSAUR33 likely affects seed vigor through the sugar pathway. One elite haplotype of OsSAUR33 associated with higher seed vigor was identified mainly in indica accessions. This study provides insight into the effects of OsSAUR33 on seed vigor in rice.
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17
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Meitzel T, Radchuk R, McAdam EL, Thormählen I, Feil R, Munz E, Hilo A, Geigenberger P, Ross JJ, Lunn JE, Borisjuk L. Trehalose 6-phosphate promotes seed filling by activating auxin biosynthesis. THE NEW PHYTOLOGIST 2021; 229:1553-1565. [PMID: 32984971 DOI: 10.1111/nph.16956] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/13/2020] [Indexed: 05/21/2023]
Abstract
Plants undergo several developmental transitions during their life cycle. One of these, the differentiation of the young embryo from a meristem-like structure into a highly specialized storage organ, is believed to be controlled by local connections between sugars and hormonal response systems. However, we know little about the regulatory networks underpinning the sugar-hormone interactions in developing seeds. By modulating the trehalose 6-phosphate (T6P) content in growing embryos of garden pea (Pisum sativum), we investigate here the role of this signaling sugar during the seed-filling process. Seeds deficient in T6P are compromised in size and starch production, resembling the wrinkled seeds studied by Gregor Mendel. We show also that T6P exerts these effects by stimulating the biosynthesis of the pivotal plant hormone, auxin. We found that T6P promotes the expression of the auxin biosynthesis gene TRYPTOPHAN AMINOTRANSFERASE RELATED2 (TAR2), and the resulting effect on auxin concentrations is required to mediate the T6P-induced activation of storage processes. Our results suggest that auxin acts downstream of T6P to facilitate seed filling, thereby providing a salient example of how a metabolic signal governs the hormonal control of an integral phase transition in a crop plant.
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Affiliation(s)
- Tobias Meitzel
- Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstr. 3, Stadt Seeland OT Gatersleben, 06466, Germany
| | - Ruslana Radchuk
- Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstr. 3, Stadt Seeland OT Gatersleben, 06466, Germany
- DeepTrait S.A., Dobrzańskiego 3, Lublin, 20-262, Poland
| | - Erin L McAdam
- School of Natural Sciences, University of Tasmania, Sandy Bay, 7001, Australia
| | - Ina Thormählen
- Faculty of Biology, Ludwig Maximilians University of Munich, Großhaderner Str. 2, Planegg-Martinsried, 82152, Germany
| | - Regina Feil
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Eberhard Munz
- Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstr. 3, Stadt Seeland OT Gatersleben, 06466, Germany
| | - Alexander Hilo
- Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstr. 3, Stadt Seeland OT Gatersleben, 06466, Germany
| | - Peter Geigenberger
- Faculty of Biology, Ludwig Maximilians University of Munich, Großhaderner Str. 2, Planegg-Martinsried, 82152, Germany
| | - John J Ross
- School of Natural Sciences, University of Tasmania, Sandy Bay, 7001, Australia
| | - John E Lunn
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Ljudmilla Borisjuk
- Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstr. 3, Stadt Seeland OT Gatersleben, 06466, Germany
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18
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Convergence and Divergence of Sugar and Cytokinin Signaling in Plant Development. Int J Mol Sci 2021; 22:ijms22031282. [PMID: 33525430 PMCID: PMC7865218 DOI: 10.3390/ijms22031282] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/19/2021] [Accepted: 01/24/2021] [Indexed: 02/06/2023] Open
Abstract
Plants adjust their growth and development through a sophisticated regulatory system integrating endogenous and exogenous cues. Many of them rely on intricate crosstalk between nutrients and hormones, an effective way of coupling nutritional and developmental information and ensuring plant survival. Sugars in their different forms such as sucrose, glucose, fructose and trehalose-6-P and the hormone family of cytokinins (CKs) are major regulators of the shoot and root functioning throughout the plant life cycle. While their individual roles have been extensively investigated, their combined effects have unexpectedly received little attention, resulting in many gaps in current knowledge. The present review provides an overview of the relationship between sugars and CKs signaling in the main developmental transition during the plant lifecycle, including seed development, germination, seedling establishment, root and shoot branching, leaf senescence, and flowering. These new insights highlight the diversity and the complexity of the crosstalk between sugars and CKs and raise several questions that will open onto further investigations of these regulation networks orchestrating plant growth and development.
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19
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Skalak J, Nicolas KL, Vankova R, Hejatko J. Signal Integration in Plant Abiotic Stress Responses via Multistep Phosphorelay Signaling. FRONTIERS IN PLANT SCIENCE 2021; 12:644823. [PMID: 33679861 PMCID: PMC7925916 DOI: 10.3389/fpls.2021.644823] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 01/26/2021] [Indexed: 05/02/2023]
Abstract
Plants growing in any particular geographical location are exposed to variable and diverse environmental conditions throughout their lifespan. The multifactorial environmental pressure resulted into evolution of plant adaptation and survival strategies requiring ability to integrate multiple signals that combine to yield specific responses. These adaptive responses enable plants to maintain their growth and development while acquiring tolerance to a variety of environmental conditions. An essential signaling cascade that incorporates a wide range of exogenous as well as endogenous stimuli is multistep phosphorelay (MSP). MSP mediates the signaling of essential plant hormones that balance growth, development, and environmental adaptation. Nevertheless, the mechanisms by which specific signals are recognized by a commonly-occurring pathway are not yet clearly understood. Here we summarize our knowledge on the latest model of multistep phosphorelay signaling in plants and the molecular mechanisms underlying the integration of multiple inputs including both hormonal (cytokinins, ethylene and abscisic acid) and environmental (light and temperature) signals into a common pathway. We provide an overview of abiotic stress responses mediated via MSP signaling that are both hormone-dependent and independent. We highlight the mutual interactions of key players such as sensor kinases of various substrate specificities including their downstream targets. These constitute a tightly interconnected signaling network, enabling timely adaptation by the plant to an ever-changing environment. Finally, we propose possible future directions in stress-oriented research on MSP signaling and highlight its potential importance for targeted crop breeding.
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Affiliation(s)
- Jan Skalak
- CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, Brno, Czechia
| | - Katrina Leslie Nicolas
- CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, Brno, Czechia
| | - Radomira Vankova
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
| | - Jan Hejatko
- CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, Brno, Czechia
- *Correspondence: Jan Hejatko,
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20
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Zhang H, Zhao Y, Zhu JK. Thriving under Stress: How Plants Balance Growth and the Stress Response. Dev Cell 2020; 55:529-543. [DOI: 10.1016/j.devcel.2020.10.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 08/21/2020] [Accepted: 10/17/2020] [Indexed: 12/24/2022]
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21
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Belda-Palazón B, Adamo M, Valerio C, Ferreira LJ, Confraria A, Reis-Barata D, Rodrigues A, Meyer C, Rodriguez PL, Baena-González E. A dual function of SnRK2 kinases in the regulation of SnRK1 and plant growth. NATURE PLANTS 2020; 6:1345-1353. [PMID: 33077877 DOI: 10.1038/s41477-020-00778-w] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 09/03/2020] [Indexed: 05/04/2023]
Abstract
Adverse environmental conditions trigger responses in plants that promote stress tolerance and survival at the expense of growth1. However, little is known of how stress signalling pathways interact with each other and with growth regulatory components to balance growth and stress responses. Here, we show that plant growth is largely regulated by the interplay between the evolutionarily conserved energy-sensing SNF1-related protein kinase 1 (SnRK1) protein kinase and the abscisic acid (ABA) phytohormone pathway. While SnRK2 kinases are main drivers of ABA-triggered stress responses, we uncover an unexpected growth-promoting function of these kinases in the absence of ABA as repressors of SnRK1. Sequestration of SnRK1 by SnRK2-containing complexes inhibits SnRK1 signalling, thereby allowing target of rapamycin (TOR) activity and growth under optimal conditions. On the other hand, these complexes are essential for releasing and activating SnRK1 in response to ABA, leading to the inhibition of TOR and growth under stress. This dual regulation of SnRK1 by SnRK2 kinases couples growth control with environmental factors typical for the terrestrial habitat and is likely to have been critical for the water-to-land transition of plants.
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Affiliation(s)
- Borja Belda-Palazón
- Instituto Gulbenkian de Ciência, GREEN-IT Bioresources for Sustainability, Oeiras, Portugal
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, Valencia, Spain
| | - Mattia Adamo
- Instituto Gulbenkian de Ciência, GREEN-IT Bioresources for Sustainability, Oeiras, Portugal
- BPMP, University of Montpellier, CNRS, INRA, Montpellier SupAgro, Montpellier, France
| | - Concetta Valerio
- Instituto Gulbenkian de Ciência, GREEN-IT Bioresources for Sustainability, Oeiras, Portugal
| | - Liliana J Ferreira
- Instituto Gulbenkian de Ciência, GREEN-IT Bioresources for Sustainability, Oeiras, Portugal
| | - Ana Confraria
- Instituto Gulbenkian de Ciência, GREEN-IT Bioresources for Sustainability, Oeiras, Portugal
| | - Diana Reis-Barata
- Instituto Gulbenkian de Ciência, GREEN-IT Bioresources for Sustainability, Oeiras, Portugal
| | - Américo Rodrigues
- MARE Marine and Environmental Sciences Centre, ESTM, Instituto Politécnico de Leiria, Peniche, Portugal
| | - Christian Meyer
- Institut Jean-Pierre Bourgin (IJPB), INRAE, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Pedro L Rodriguez
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, Valencia, Spain
| | - Elena Baena-González
- Instituto Gulbenkian de Ciência, GREEN-IT Bioresources for Sustainability, Oeiras, Portugal.
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Wang WR, Liang JH, Wang GF, Sun MX, Peng FT, Xiao YS. Overexpression of PpSnRK1α in tomato enhanced salt tolerance by regulating ABA signaling pathway and reactive oxygen metabolism. BMC PLANT BIOLOGY 2020; 20:128. [PMID: 32216751 PMCID: PMC7099830 DOI: 10.1186/s12870-020-02342-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 03/16/2020] [Indexed: 05/19/2023]
Abstract
BACKGROUND SNF-related Kinase 1 (SnRK1) is a key component of the cell signaling network. SnRK1 is known to respond to a wide variety of stresses, but its exact role in salt stress response and tolerance is still largely unknown. RESULTS In this study, we reported that overexpression of the gene encoding the α subunit of Prunus persica SnRK1 (PpSnRK1α) in tomato could improve salt stress tolerance. The increase in salt stress tolerance in PpSnRK1α-overexpressing plants was found to correlate with increased PpSnRK1α expression level and SnRK1 kinase activity. And PpSnRK1α overexpression lines exhibited a lower level of leaf damage as well as increased proline content and reduced malondialdehyde (MDA) compared with wild-type (WT) lines under salt stress. Furthermore, PpSnRK1α enhanced reactive oxygen species (ROS) metabolism by increasing the expression level of antioxidase genes and antioxidant enzyme activities. We further sequenced the transcriptomes of the WT and three PpSnRK1α overexpression lines using RNA-seq and identified about 1000 PpSnRK1α-regulated genes, including many antioxidant enzymes, and these genes were clearly enriched in the MAPK signaling pathway (plant), plant-pathogen interactions and plant hormone signaling transduction and can respond to stimuli, metabolic processes, and biological regulation. Furthermore, we identified the transcriptional levels of several salt stress-responsive genes, SlPP2C37, SlPYL4, SlPYL8, SlNAC022, SlNAC042, and SlSnRK2 family were altered significantly by PpSnRK1α, signifying that SnRK1α may be involved in the ABA signaling pathway to improve tomato salt tolerance. Overall, these findings provided new evidence for the underlying mechanism of SnRK1α conferment in plant salt tolerance phenotypes. CONCLUSIONS Our findings demonstrated that plant salt stress resistance can be affected by the regulation of the SnRK1α. Further molecular and genetic approaches will accelerate our knowledge of PpSnRK1α functions, and inform the genetic improvement of salt tolerance in tomato through genetic engineering and other related strategies.
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Affiliation(s)
- Wen-Ru Wang
- College of Horticulture Science and Engineering; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, 271000 Shandong China
| | - Jia-Hui Liang
- College of Horticulture Science and Engineering; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, 271000 Shandong China
| | - Gui-Fang Wang
- College of Horticulture Science and Engineering; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, 271000 Shandong China
| | - Mao-Xiang Sun
- College of Horticulture Science and Engineering; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, 271000 Shandong China
| | - Fu-Tian Peng
- College of Horticulture Science and Engineering; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, 271000 Shandong China
| | - Yuan-Song Xiao
- College of Horticulture Science and Engineering; State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an, 271000 Shandong China
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23
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Wang Y, Yan H, Qiu Z, Hu B, Zeng B, Zhong C, Fan C. Comprehensive Analysis of SnRK Gene Family and their Responses to Salt Stress in Eucalyptus grandis. Int J Mol Sci 2019; 20:E2786. [PMID: 31174407 PMCID: PMC6600528 DOI: 10.3390/ijms20112786] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/02/2019] [Accepted: 06/04/2019] [Indexed: 11/17/2022] Open
Abstract
The sucrose non-fermentation-related protein kinase (SnRK) is a kind of Ser/Thr protein kinase, which plays a crucial role in plant stress response by phosphorylating the target protein to regulate the interconnection of various signaling pathways. However, little is known about the SnRK family in Eucalyptus grandis. Thirty-four putative SnRK sequences were identified in E. grandis and divided into three subgroups (SnRK1, SnRK2 and SnRK3) based on phylogenetic analysis and the type of domain. Chromosome localization showed that SnRK family members are unevenly distributed in the remaining 10 chromosomes, with the notable exception of chromosome 11. Gene structure analysis reveal that 10 of the 24 SnRK3 genes contained no introns. Moreover, conserved motif analyses showed that SnRK sequences belonged to the same subgroup that contained the same motif type of motif. The Ka/Ks ratio of 17 paralogues suggested that the EgrSnRK gene family underwent a purifying selection. The upstream region of EgrSnRK genes enriched with different type and numbers of cis-elements indicated that EgrSnRK genes are likely to play a role in the response to diverse stresses. Quantitative real-time PCR showed that the majority of the SnRK genes were induced by salt treatment. Genome-wide analyses and expression pattern analyses provided further understanding on the function of the SnRK family in the stress response to different environmental salt concentrations.
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Affiliation(s)
- Yujiao Wang
- Key Laboratory of State Forestry Administration on Tropical Forest Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
- .Key Laboratory of Forest Genetics and Biotechnology, Ministry of Education of China, Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.
| | - Huifang Yan
- Key Laboratory of State Forestry Administration on Tropical Forest Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
| | - Zhenfei Qiu
- Key Laboratory of State Forestry Administration on Tropical Forest Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
| | - Bing Hu
- Key Laboratory of State Forestry Administration on Tropical Forest Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
| | - Bingshan Zeng
- Key Laboratory of State Forestry Administration on Tropical Forest Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
| | - Chonglu Zhong
- Key Laboratory of State Forestry Administration on Tropical Forest Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
| | - Chunjie Fan
- Key Laboratory of State Forestry Administration on Tropical Forest Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
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Margalha L, Confraria A, Baena-González E. SnRK1 and TOR: modulating growth-defense trade-offs in plant stress responses. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2261-2274. [PMID: 30793201 DOI: 10.1093/jxb/erz066] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 02/07/2019] [Indexed: 05/11/2023]
Abstract
The evolutionarily conserved protein kinase complexes SnRK1 and TOR are central metabolic regulators essential for plant growth, development, and stress responses. They are activated by opposite signals, and the outcome of their activation is, in global terms, antagonistic. Similarly to their yeast and animal counterparts, SnRK1 is activated by the energy deficit often associated with stress to restore homeostasis, while TOR is activated in nutrient-rich conditions to promote growth. Recent evidence suggests that SnRK1 represses TOR in plants, revealing evolutionary conservation also in their crosstalk. Given their importance for integrating environmental information into growth and developmental programs, these signaling pathways hold great promise for reducing the growth penalties caused by stress. Here we review the literature connecting SnRK1 and TOR to plant stress responses. Although SnRK1 and TOR emerge mostly as positive regulators of defense and growth, respectively, the outcome of their activities in plant growth and performance is not always straightforward. Manipulation of both pathways under similar experimental setups, as well as further biochemical and genetic analyses of their molecular and functional interaction, is essential to fully understand the mechanisms through which these two metabolic pathways contribute to stress responses, growth, and development.
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Affiliation(s)
- Leonor Margalha
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande,Oeiras, Portugal
| | - Ana Confraria
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande,Oeiras, Portugal
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25
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Wang J, Guan H, Dong R, Liu C, Liu Q, Liu T, Wang L, He C. Overexpression of maize sucrose non-fermenting-1-related protein kinase 1 genes, ZmSnRK1s, causes alteration in carbon metabolism and leaf senescence in Arabidopsis thaliana. Gene 2019; 691:34-44. [DOI: 10.1016/j.gene.2018.12.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/23/2018] [Accepted: 12/14/2018] [Indexed: 12/18/2022]
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26
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Zúñiga-Sánchez E, Rodríguez-Sotres R, Coello P, Martínez-Barajas E. Effect of catalytic subunit phosphorylation on the properties of SnRK1 from Phaseolus vulgaris embryos. PHYSIOLOGIA PLANTARUM 2019; 165:632-643. [PMID: 29766514 DOI: 10.1111/ppl.12761] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 04/25/2018] [Accepted: 05/11/2018] [Indexed: 06/08/2023]
Abstract
Legume seed development represents a high demand for energy and metabolic resources to support the massive synthesis of starch and proteins. However, embryo growth occurs in an environment with reduced O2 that forces the plant to adapt its metabolic activities to maximize efficient energy use. SNF1-related protein kinase1 (SnRK1) is a master metabolic regulator needed for cells adaptation to conditions that reduce energy availability, and its activity is needed for the successful development of seeds. In bean embryo extracts, SnRK1 can be separated by anion exchange chromatography into two pools: one where the catalytic subunit is phosphorylated (SnRK1-p) and another with reduced phosphorylation (SnRK1-np). The phosphorylation of the catalytic subunit produces a large increase in SnRK1 activity but has a minor effect in determining its sensitivity to metabolic inhibitors such as trehalose 6-P (T6P), ADP-glucose (ADPG), glucose 1-P (G1P) and glucose 6-P (G6P). In Arabidopsis thaliana, upstream activating kinases (SnAK) phosphorylate the SnRK1 catalytic subunit at T175/176, promoting and enhancing its activity. Recombinant Phaseolus vulgaris homologous to SnAK proteins (PvSnAK), can phosphorylate and activate the catalytic domains of the α-subunits of Arabidopsis, as well as the SnRK1-np pool purified from bean embryos. While the phosphorylation process is extremely efficient for catalytic domains, the phosphorylation of the SnRK1-np complex was less effective but produced a significant increase in activity. The presence of SnRK1-np could contribute to a quick response to unexpected adverse conditions. However, in addition to PvSnAK kinases, other factors might contribute to regulating the activation of SnRK1.
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Affiliation(s)
- Esther Zúñiga-Sánchez
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), México, DF, 04510, Mexico
| | - Rogelio Rodríguez-Sotres
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), México, DF, 04510, Mexico
| | - Patricia Coello
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), México, DF, 04510, Mexico
| | - Eleazar Martínez-Barajas
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), México, DF, 04510, Mexico
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27
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Wang L, Wang H, He S, Meng F, Zhang C, Fan S, Wu J, Zhang S, Xu P. GmSnRK1.1, a Sucrose Non-fermenting-1(SNF1)-Related Protein Kinase, Promotes Soybean Resistance to Phytophthora sojae. FRONTIERS IN PLANT SCIENCE 2019; 10:996. [PMID: 31428116 PMCID: PMC6688127 DOI: 10.3389/fpls.2019.00996] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 07/16/2019] [Indexed: 05/22/2023]
Abstract
Phytophthora root and stem rot, a destructive disease of soybean [Glycine max (L.) Merr.], is caused by the oomycete Phytophthora sojae. However, how the disease resistance mechanisms of soybean respond to P. sojae infection remains unclear. Previously, we showed that GmWRKY31, which interacts with a sucrose non-fermenting-1(SNF1)-related protein kinase (SnRK), enhances resistance to P. sojae in soybean. Here, we report that the membrane-localized SnRK GmSnRK1.1 is involved in the soybean host response to P. sojae. The overexpression of GmSnRK1.1 (GmSnRK1.1-OE) increased soybean resistance to P. sojae, and the RNA interference (RNAi)-mediated silencing of GmSnRK1.1 (GmSnRK1.1-R) reduced resistance to P. sojae. Moreover, the activities and transcript levels of the antioxidant enzymes superoxide dismutase and peroxidase were markedly higher in the GmSnRK1.1-OE transgenic soybean plants than in the wild type (WT), but were reduced in the GmSnRK1.1-R plants. Several isoflavonoid phytoalexins related genes GmPAL, GmIFR, Gm4CL and GmCHS were significantly higher in "Suinong 10" and GmSnRK1.1-OE lines than these in "Dongnong 50," and were significantly lower in GmSnRK1.1-R lines. In addition, the accumulation of salicylic acid (SA) and the expression level of the SA biosynthesis-related gene were significantly higher in the GmSnRK1.1-OE plants than in the WT and GmSnRK1.1-R plants, moreover, SA biosynthesis inhibitor treated GmSnRK1.1-R lines plants displayed clearly increased pathogen biomass compared with H2O-treated plants after 24 h post-inoculation. These results showed that GmSnRK1.1 positively regulates soybean resistance to P. sojae, potentially functioning via effects on the expression of SA-related genes and increased accumulation of SA.
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Affiliation(s)
- Le Wang
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
| | - Huiyu Wang
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
| | - Shengfu He
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
| | - Fanshan Meng
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
| | - Chuanzhong Zhang
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
| | - Sujie Fan
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
- College of Agronomy, Plant Biotechnology Center, Jilin Agricultural University, Changchun, China
| | - Junjiang Wu
- Soybean Research Institute of Heilongjiang Academy of Agricultural Sciences, Key Laboratory of Soybean Cultivation of Ministry of Agriculture P. R. China, Harbin, China
| | - Shuzhen Zhang
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
- *Correspondence: Shuzhen Zhang,
| | - Pengfei Xu
- Soybean Research Institute/Key Laboratory of Soybean Biology of Chinese Education Ministry, Northeast Agricultural University, Harbin, China
- Pengfei Xu,
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28
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Rahaman M, Mamidi S, Rahman M. Genome-wide association study of heat stress-tolerance traits in spring-type Brassica napus L. under controlled conditions. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.cj.2017.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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29
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Okeke UG, Akdemir D, Rabbi I, Kulakow P, Jannink JL. Regional Heritability Mapping Provides Insights into Dry Matter Content in African White and Yellow Cassava Populations. THE PLANT GENOME 2018; 11:10.3835/plantgenome2017.06.0050. [PMID: 29505634 PMCID: PMC7822058 DOI: 10.3835/plantgenome2017.06.0050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 06/20/2017] [Indexed: 05/21/2023]
Abstract
The HarvestPlus program for cassava ( Crantz) fortifies cassava with β-carotene by breeding for carotene-rich tubers (yellow cassava). However, a negative correlation between yellowness and dry matter (DM) content has been identified. We investigated the genetic control of DM in white and yellow cassava. We used regional heritability mapping (RHM) to associate DM with genomic segments in both subpopulations. Significant segments were subjected to candidate gene analysis and candidates were validated with prediction accuracies. The RHM procedure was validated via a simulation approach and revealed significant hits for white cassava on chromosomes 1, 4, 5, 10, 17, and 18, whereas hits for the yellow were on chromosome 1. Candidate gene analysis revealed genes in the carbohydrate biosynthesis pathway including plant serine-threonine protein kinases (SnRKs), UDP (uridine diphosphate)-glycosyltransferases, UDP-sugar transporters, invertases, pectinases, and regulons. Validation using 1252 unique identifiers from the SnRK gene family genome-wide recovered 50% of the predictive accuracy of whole-genome single nucleotide polymorphisms for DM, whereas validation using 53 likely genes (extracted from the literature) from significant segments recovered 32%. Genes including an acid invertase, a neutral or alkaline invertase, and a glucose-6-phosphate isomerase were validated on the basis of an a priori list for the cassava starch pathway, and also a fructose-biphosphate aldolase from the Calvin cycle pathway. The power of the RHM procedure was estimated as 47% when the causal quantitative trait loci generated 10% of the phenotypic variance (sample size = 451). Cassava DM genetics are complex and RHM may be useful for complex traits.
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Affiliation(s)
- Uche Godfrey Okeke
- Section of Plant Breeding and Genetics, School of Integrative
Plant Sci., College of Agriculture and Life Sci., Cornell Univ., 14853, Ithaca,
NY
| | - Deniz Akdemir
- Section of Plant Breeding and Genetics, School of Integrative
Plant Sci., College of Agriculture and Life Sci., Cornell Univ., 14853, Ithaca,
NY
- current address, Statgen Consulting, Ithaca, NY 14850
| | | | | | - Jean-Luc Jannink
- Section of Plant Breeding and Genetics, School of Integrative
Plant Sci., College of Agriculture and Life Sci., Cornell Univ., 14853, Ithaca,
NY
- USDAARS, Robert W. Holley Centre for Agriculture and Health, Tower
Road, Ithaca, NY 14853
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30
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Filipe O, De Vleesschauwer D, Haeck A, Demeestere K, Höfte M. The energy sensor OsSnRK1a confers broad-spectrum disease resistance in rice. Sci Rep 2018; 8:3864. [PMID: 29497084 PMCID: PMC5832823 DOI: 10.1038/s41598-018-22101-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 02/14/2018] [Indexed: 12/29/2022] Open
Abstract
Sucrose non-fermenting-1-related protein kinase-1 (SnRK1) belongs to a family of evolutionary conserved kinases with orthologs in all eukaryotes, ranging from yeasts (SnF1) to mammals (AMP-Activated kinase). These kinases sense energy deficits caused by nutrient limitation or stress and coordinate the required adaptations to maintain energy homeostasis and survival. In plants, SnRK1 is a global regulator of plant metabolism and is also involved in abiotic stress responses. Its role in the response to biotic stress, however, is only starting to be uncovered. Here we studied the effect of altered SnRK1a expression on growth and plant defense in rice. OsSnRK1a overexpression interfered with normal growth and development and increased resistance against both (hemi)biotrophic and necrotrophic pathogens, while OsSnRK1a silencing in RNAi lines increased susceptibility. OsSnRK1a overexpression positively affected the salicylic acid pathway and boosted the jasmonate-mediated defense response after inoculation with the blast fungus Pyricularia oryzae. Together these findings strongly suggest OsSnRK1a to be involved in plant basal immunity and favor a model whereby OsSnRK1a acts as a master switch that regulates growth-immunity trade-offs.
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Affiliation(s)
- Osvaldo Filipe
- Laboratory of Phytopathology, Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - David De Vleesschauwer
- Laboratory of Phytopathology, Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
- Bayer CropScience NV, Technologiepark 38, 9051, Zwijnaarde, Belgium
| | - Ashley Haeck
- Research Group EnVOC, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Kristof Demeestere
- Research Group EnVOC, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Monica Höfte
- Laboratory of Phytopathology, Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium.
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31
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Nietzsche M, Guerra T, Alseekh S, Wiermer M, Sonnewald S, Fernie AR, Börnke F. STOREKEEPER RELATED1/G-Element Binding Protein (STKR1) Interacts with Protein Kinase SnRK1. PLANT PHYSIOLOGY 2018; 176:1773-1792. [PMID: 29192025 PMCID: PMC5813543 DOI: 10.1104/pp.17.01461] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 11/27/2017] [Indexed: 05/19/2023]
Abstract
Sucrose nonfermenting related kinase1 (SnRK1) is a conserved energy sensor kinase that regulates cellular adaptation to energy deficit in plants. Activation of SnRK1 leads to the down-regulation of ATP-consuming biosynthetic processes and the stimulation of energy-generating catabolic reactions by transcriptional reprogramming and posttranslational modifications. Although considerable progress has been made during the last years in understanding the SnRK1 signaling pathway, many of its components remain unidentified. Here, we show that the catalytic α-subunits KIN10 and KIN11 of the Arabidopsis (Arabidopsis thaliana) SnRK1 complex interact with the STOREKEEPER RELATED1/G-Element Binding Protein (STKR1) inside the plant cell nucleus. Overexpression of STKR1 in transgenic Arabidopsis plants led to reduced growth, a delay in flowering, and strongly attenuated senescence. Metabolite profiling revealed that the transgenic lines exhausted their carbohydrates during the dark period to a greater extent than the wild type and accumulated a range of amino acids. At the global transcriptome level, genes affected by STKR1 overexpression were broadly associated with systemic acquired resistance, and transgenic plants showed enhanced resistance toward a virulent strain of the biotrophic oomycete pathogen Hyaloperonospora arabidopsidis Noco2. We discuss a possible connection of STKR1 function, SnRK1 signaling, and plant immunity.
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Affiliation(s)
- Madlen Nietzsche
- Plant Metabolism Group, Leibniz-Institute of Vegetable and Ornamental Crops, 14979 Grossbeeren, Germany
| | - Tiziana Guerra
- Plant Metabolism Group, Leibniz-Institute of Vegetable and Ornamental Crops, 14979 Grossbeeren, Germany
| | - Saleh Alseekh
- Max-Planck-Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Marcel Wiermer
- University of Goettingen, Albrecht-von-Haller Institute for Plant Sciences, RG Molecular Biology of Plant-Microbe Interactions, 37077 Goettingen, Germany
| | - Sophia Sonnewald
- Friedrich-Alexander-Universität, Department of Biology, Division of Biochemistry, 91058 Erlangen, Germany
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Frederik Börnke
- Plant Metabolism Group, Leibniz-Institute of Vegetable and Ornamental Crops, 14979 Grossbeeren, Germany
- Institute of Biochemistry and Biology, University of Potsdam, 14476 Potsdam, Germany
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32
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Wingler A. Transitioning to the Next Phase: The Role of Sugar Signaling throughout the Plant Life Cycle. PLANT PHYSIOLOGY 2018; 176:1075-1084. [PMID: 28974627 PMCID: PMC5813577 DOI: 10.1104/pp.17.01229] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 09/26/2017] [Indexed: 05/17/2023]
Abstract
Developmental transitions depend on the availability of sufficient carbon resources, which is sensed by sugar signaling pathways for high and low carbon availability.
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Affiliation(s)
- Astrid Wingler
- School of Biological, Earth and Environmental Sciences, University College Cork, T23 TK30, Cork, Ireland
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Simon NML, Sawkins E, Dodd AN. Involvement of the SnRK1 subunit KIN10 in sucrose-induced hypocotyl elongation. PLANT SIGNALING & BEHAVIOR 2018; 13:e1457913. [PMID: 29584583 PMCID: PMC6110359 DOI: 10.1080/15592324.2018.1457913] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/20/2018] [Accepted: 03/21/2018] [Indexed: 05/21/2023]
Abstract
A mechanism participating in energy sensing and signalling in plants involves the regulation of sucrose non-fermenting1 (Snf1)-related protein kinase 1 (SnRK1) activity in response to sugar availability. SnRK1 is thought to regulate the activity of both metabolic enzymes and transcription factors in response to changes in energy availability, with trehalose-6-phospate functioning as a signalling sugar that suppresses SnRK1 activity under sugar-replete conditions. Sucrose supplementation increases the elongation of hypocotyls of developing Arabidopsis seedlings, and this response to sucrose involves both the SnRK1 subunit KIN10 and also TREHALOSE-6-PHOSPHATE SYNTHASE1 (TPS1). Here, we measured sucrose-induced hypocotyl elongation in two insertional mutants of KIN10 (akin10 and akin10-2). Under short photoperiods, sucrose supplementation caused great proportional hypocotyl elongation in these KIN10 mutants compared with the wild type, and these mutants had shorter hypocotyls than the wild type in the absence of sucrose supplementation. One interpretation is that SnRK1 activity might suppress hypocotyl elongation in the presence of sucrose, because KIN10 overexpression inhibits sucrose-induced hypocotyl elongation and akin10 mutants enhance sucrose-induced hypocotyl elongation.
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Affiliation(s)
- Noriane M. L. Simon
- School of Biological Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, U.K.
| | - Ellie Sawkins
- School of Biological Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, U.K.
| | - Antony N. Dodd
- School of Biological Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, U.K.
- CONTACT Antony N. Dodd School of Biological Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, U.K.
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Liu XJ, Liu X, An XH, Han PL, You CX, Hao YJ. An Apple Protein Kinase MdSnRK1.1 Interacts with MdCAIP1 to Regulate ABA Sensitivity. PLANT & CELL PHYSIOLOGY 2017; 58:1631-1641. [PMID: 29016962 DOI: 10.1093/pcp/pcx096] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 07/04/2017] [Indexed: 05/09/2023]
Abstract
ABA is a crucial phytohormone for development and stress responses in plants. Snf1-related protein kinase 1.1 (SnRK1.1) is involved in the ABA response. However, the molecular mechanism underlying the SnRK1.1 response to ABA is largely unknown. Here, it was found that overexpression of the apple MdSnRK1.1 gene enhanced ABA sensitivity in both transgenic apple calli and Arabidopsis seedlings. Subsequently, a yeast two-hybrid screen demonstrated that MdCAIP1 (C2-domain ABA Insensitive Protein1) interacted with MdSnRK1.1. Their interaction was further confirmed by pull-down and co-immunoprecipitation assays. Expression of the MdCAIP1 gene was positively induced by ABA. Its overexpression enhanced ABA sensitivity in transgenic apple calli. Furthermore, it was found that MdSnRK1.1 phosphorylated the MdCAIP1 protein in vivo and promoted its degradation in vitro and in vivo. As a result, MdSnRK1.1 inhibited MdCAIP1-mediated ABA sensitivity, and MdCAIP1 partially reduced MdSnRK1.1-mediated ABA sensitivity. Our findings indicate that MdSnRK1.1 plays an important role in the ABA response, partially by controlling the stability of the MdCAIP1 protein.
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Affiliation(s)
- Xiao-Juan Liu
- State Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Xin Liu
- State Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Xiu-Hong An
- China Research Institute of Pomology, CAAS, Xingcheng 125100, China
| | - Peng-Liang Han
- State Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Chun-Xiang You
- State Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
| | - Yu-Jin Hao
- State Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018, China
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Chan A, Carianopol C, Tsai AYL, Varatharajah K, Chiu RS, Gazzarrini S. SnRK1 phosphorylation of FUSCA3 positively regulates embryogenesis, seed yield, and plant growth at high temperature in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:4219-4231. [PMID: 28922765 PMCID: PMC5853833 DOI: 10.1093/jxb/erx233] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 06/09/2017] [Indexed: 05/19/2023]
Abstract
The transcription factor FUSCA3 (FUS3) acts as a major regulator of seed maturation in Arabidopsis. FUS3 is phosphorylated by the SnRK1 catalytic subunit AKIN10/SnRK1α1, which belongs to a conserved eukaryotic kinase complex involved in energy homeostasis. Here we show that AKIN10 and FUS3 share overlapping expression patterns during embryogenesis, and that FUS3 is phosphorylated by AKIN10 in embryo cell extracts. To understand the role of FUS3 phosphorylation, we generated fus3-3 plants carrying FUS3 phosphorylation-null (FUS3S>A) and phosphorylation-mimic (FUS3S>D) variants. While FUS3S>A and FUS3S>D rescued all the fus3-3 seed maturation defects, FUS3S>A showed reduced transcriptional activity and enhanced fus3-3 previously uncharacterized phenotypes. FUS3S>A embryos displayed increased seed abortion due to maternal FUS3S>A and delayed embryo development, which correlated with a strong decrease in seed yield (~50%). Accordingly, the akin10 and akin11 mutants displayed a frequency of seed abortion similar to fus3-3. When plants were grown at elevated temperature, most phenotypes were exaggerated in FUS3S>A plants, and progeny seedlings overall grew poorly, suggesting that phosphorylation of FUS3 plays an important role during early embryogenesis and under heat stress. Collectively, these results suggest that FUS3 phosphorylation and SnRK1 are required for embryogenesis and integration of environmental cues to ensure the survival of the progeny.
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Affiliation(s)
- Aaron Chan
- Department of Biological Sciences, University of Toronto Scarborough, Military Trail, Toronto, ON Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON Canada
| | - Carina Carianopol
- Department of Biological Sciences, University of Toronto Scarborough, Military Trail, Toronto, ON Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON Canada
| | - Allen Yi-Lun Tsai
- Department of Biological Sciences, University of Toronto Scarborough, Military Trail, Toronto, ON Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON Canada
| | - Kresanth Varatharajah
- Department of Biological Sciences, University of Toronto Scarborough, Military Trail, Toronto, ON Canada
| | - Rex Shun Chiu
- Department of Biological Sciences, University of Toronto Scarborough, Military Trail, Toronto, ON Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON Canada
| | - Sonia Gazzarrini
- Department of Biological Sciences, University of Toronto Scarborough, Military Trail, Toronto, ON Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON Canada
- Correspondence:
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Navarro BV, Elbl P, De Souza AP, Jardim V, de Oliveira LF, Macedo AF, dos Santos ALW, Buckeridge MS, Floh EIS. Carbohydrate-mediated responses during zygotic and early somatic embryogenesis in the endangered conifer, Araucaria angustifolia. PLoS One 2017; 12:e0180051. [PMID: 28678868 PMCID: PMC5497979 DOI: 10.1371/journal.pone.0180051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 06/08/2017] [Indexed: 12/30/2022] Open
Abstract
Three zygotic developmental stages and two somatic Araucaria angustifolia cell lines with contrasting embryogenic potential were analyzed to identify the carbohydrate-mediated responses associated with embryo formation. Using a comparison between zygotic and somatic embryogenesis systems, the non-structural carbohydrate content, cell wall sugar composition and expression of genes involved in sugar sensing were analyzed, and a network analysis was used to identify coordinated features during embryogenesis. We observed that carbohydrate-mediated responses occur mainly during the early stages of zygotic embryo formation, and that during seed development there are coordinated changes that affect the development of the different structures (embryo and megagametophyte). Furthermore, sucrose and starch accumulation were associated with the responsiveness of the cell lines. This study sheds light on how carbohydrate metabolism is influenced during zygotic and somatic embryogenesis in the endangered conifer species, A. angustifolia.
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Affiliation(s)
- Bruno V. Navarro
- Laboratory of Plant Cell Biology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - Paula Elbl
- Laboratory of Plant Cell Biology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - Amanda P. De Souza
- Laboratory of Plant Physiological Ecology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - Vinicius Jardim
- Laboratory of Plant Physiological Ecology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - Leandro F. de Oliveira
- Laboratory of Plant Cell Biology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - Amanda F. Macedo
- Laboratory of Plant Cell Biology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - André L. W. dos Santos
- Laboratory of Plant Cell Biology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - Marcos S. Buckeridge
- Laboratory of Plant Physiological Ecology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
| | - Eny I. S. Floh
- Laboratory of Plant Cell Biology, Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo-SP, Brazil
- * E-mail:
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Shin J, Sánchez-Villarreal A, Davis AM, Du SX, Berendzen KW, Koncz C, Ding Z, Li C, Davis SJ. The metabolic sensor AKIN10 modulates the Arabidopsis circadian clock in a light-dependent manner. PLANT, CELL & ENVIRONMENT 2017; 40:997-1008. [PMID: 28054361 DOI: 10.1111/pce.12903] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 12/12/2016] [Accepted: 12/19/2016] [Indexed: 05/06/2023]
Abstract
Plants generate rhythmic metabolism during the repetitive day/night cycle. The circadian clock produces internal biological rhythms to synchronize numerous metabolic processes such that they occur at the required time of day. Metabolism conversely influences clock function by controlling circadian period and phase and the expression of core-clock genes. Here, we show that AKIN10, a catalytic subunit of the evolutionarily conserved key energy sensor sucrose non-fermenting 1 (Snf1)-related kinase 1 (SnRK1) complex, plays an important role in the circadian clock. Elevated AKIN10 expression led to delayed peak expression of the circadian clock evening-element GIGANTEA (GI) under diurnal conditions. Moreover, it lengthened clock period specifically under light conditions. Genetic analysis showed that the clock regulator TIME FOR COFFEE (TIC) is required for this effect of AKIN10. Taken together, we propose that AKIN10 conditionally works in a circadian clock input pathway to the circadian oscillator.
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Affiliation(s)
- Jieun Shin
- Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, 50829, Germany
| | - Alfredo Sánchez-Villarreal
- Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, 50829, Germany
- Colegio de Postgraduados campus Campeche, Campeche, 24750, Mexico
| | - Amanda M Davis
- Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, 50829, Germany
- Department of Biology, University of York, York, YO10 5DD, UK
| | - Shen-Xiu Du
- Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, 50829, Germany
| | - Kenneth W Berendzen
- Zentrum für Molekularbiologie der Pflanzen, Universität Tübingen, Tübingen, 72076, Germany
| | - Csaba Koncz
- Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, 50829, Germany
| | - Zhaojun Ding
- College of Life Sciences, Shandong University, Jinan, 250100, China
| | - Cuiling Li
- College of Life Sciences, Shandong University, Jinan, 250100, China
| | - Seth J Davis
- Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Cologne, 50829, Germany
- Department of Biology, University of York, York, YO10 5DD, UK
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Baena-González E, Hanson J. Shaping plant development through the SnRK1-TOR metabolic regulators. CURRENT OPINION IN PLANT BIOLOGY 2017; 35:152-157. [PMID: 28027512 DOI: 10.1016/j.pbi.2016.12.004] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 05/20/2023]
Abstract
SnRK1 (Snf1-related protein kinase 1) and TOR (target of rapamycin) are evolutionarily conserved protein kinases that lie at the heart of energy sensing, playing central and antagonistic roles in the regulation of metabolism and gene expression. Increasing evidence links these metabolic regulators to numerous aspects of plant development, from germination to flowering and senescence. This prompts the hypothesis that SnRK1 and TOR modify developmental programs according to the metabolic status to adjust plant growth to a specific environment. The aim of this review is to provide support to this hypothesis and to incentivize further studies on this topic by summarizing the work that establishes a genetic connection between SnRK1-TOR and plant development.
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Affiliation(s)
- Elena Baena-González
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande 6, 2780-156 Oeiras, Portugal.
| | - Johannes Hanson
- Umeå Plant Science Center, Department of Plant Physiology, Umeå University, 90187 Umeå, Sweden.
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Carvalho RF, Szakonyi D, Simpson CG, Barbosa ICR, Brown JWS, Baena-González E, Duque P. The Arabidopsis SR45 Splicing Factor, a Negative Regulator of Sugar Signaling, Modulates SNF1-Related Protein Kinase 1 Stability. THE PLANT CELL 2016; 28:1910-25. [PMID: 27436712 PMCID: PMC5006706 DOI: 10.1105/tpc.16.00301] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 07/05/2016] [Accepted: 07/19/2016] [Indexed: 05/19/2023]
Abstract
The ability to sense and respond to sugar signals allows plants to cope with environmental and metabolic changes by adjusting growth and development accordingly. We previously reported that the SR45 splicing factor negatively regulates glucose signaling during early seedling development in Arabidopsis thaliana Here, we show that under glucose-fed conditions, the Arabidopsis sr45-1 loss-of-function mutant contains higher amounts of the energy-sensing SNF1-Related Protein Kinase 1 (SnRK1) despite unaffected SnRK1 transcript levels. In agreement, marker genes for SnRK1 activity are upregulated in sr45-1 plants, and the glucose hypersensitivity of sr45-1 is attenuated by disruption of the SnRK1 gene. Using a high-resolution RT-PCR panel, we found that the sr45-1 mutation broadly targets alternative splicing in vivo, including that of the SR45 pre-mRNA itself. Importantly, the enhanced SnRK1 levels in sr45-1 are suppressed by a proteasome inhibitor, indicating that SR45 promotes targeting of the SnRK1 protein for proteasomal destruction. Finally, we demonstrate that SR45 regulates alternative splicing of the Arabidopsis 5PTase13 gene, which encodes an inositol polyphosphate 5-phosphatase previously shown to interact with and regulate the stability of SnRK1 in vitro, thus providing a mechanistic link between SR45 function and the modulation of degradation of the SnRK1 energy sensor in response to sugars.
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Affiliation(s)
| | - Dóra Szakonyi
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal
| | - Craig G Simpson
- The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland, United Kingdom
| | | | - John W S Brown
- The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland, United Kingdom University of Dundee at The James Hutton Institute, Invergowrie, Dundee DD2 5DA, Scotland, United Kingdom
| | | | - Paula Duque
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal
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Hulsmans S, Rodriguez M, De Coninck B, Rolland F. The SnRK1 Energy Sensor in Plant Biotic Interactions. TRENDS IN PLANT SCIENCE 2016; 21:648-661. [PMID: 27156455 DOI: 10.1016/j.tplants.2016.04.008] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/24/2016] [Accepted: 04/07/2016] [Indexed: 05/20/2023]
Abstract
Our understanding of plant biotic interactions has grown significantly in recent years with the identification of the mechanisms involved in innate immunity, hormone signaling, and secondary metabolism. The impact of such interactions on primary metabolism and the role of metabolic signals in the response of the plants, however, remain far less explored. The SnRK1 (SNF1-related kinase 1) kinases act as metabolic sensors, integrating very diverse stress conditions, and are key in maintaining energy homeostasis for growth and survival. Consistently, an important role is emerging for these kinases as regulators of biotic stress responses triggered by viral, bacterial, fungal, and oomycete infections as well as by herbivory. While this identifies SnRK1 as a promising target for directed modification or selection for more quantitative and sustainable resistance, its central function also increases the chances of unwanted side effects on growth and fitness, stressing the need for identification and in-depth characterization of the mechanisms and target processes involved. VIDEO ABSTRACT.
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Affiliation(s)
- Sander Hulsmans
- Laboratory of Molecular Plant Biology, Biology Department, University of Leuven-KU Leuven, Kasteelpark Arenberg 31, 3001 Heverlee-Leuven, Belgium
| | - Marianela Rodriguez
- Instituto de Fisiología y Recursos Genéticos Vegetales (IFRGV), Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), Camino 60 cuadras km 5.5 X5020ICA, Córdoba, Argentina
| | - Barbara De Coninck
- Centre of Microbial and Plant Genetics, Microbial and Molecular Systems Department, University of Leuven-KU Leuven, Kasteelpark Arenberg 20, 3001 Heverlee-Leuven, Belgium; Vlaams Instituut voor Biotechnologie (VIB), Department of Plant Systems Biology, Technologiepark 927, 9052 Gent, Belgium
| | - Filip Rolland
- Laboratory of Molecular Plant Biology, Biology Department, University of Leuven-KU Leuven, Kasteelpark Arenberg 31, 3001 Heverlee-Leuven, Belgium.
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Gao XQ, Liu CZ, Li DD, Zhao TT, Li F, Jia XN, Zhao XY, Zhang XS. The Arabidopsis KINβγ Subunit of the SnRK1 Complex Regulates Pollen Hydration on the Stigma by Mediating the Level of Reactive Oxygen Species in Pollen. PLoS Genet 2016; 12:e1006228. [PMID: 27472382 PMCID: PMC4966946 DOI: 10.1371/journal.pgen.1006228] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 07/08/2016] [Indexed: 12/25/2022] Open
Abstract
Pollen–stigma interactions are essential for pollen germination. The highly regulated process of pollen germination includes pollen adhesion, hydration, and germination on the stigma. However, the internal signaling of pollen that regulates pollen–stigma interactions is poorly understood. KINβγ is a plant-specific subunit of the SNF1-related protein kinase 1 complex which plays important roles in the regulation of plant development. Here, we showed that KINβγ was a cytoplasm- and nucleus-localized protein in the vegetative cells of pollen grains in Arabidopsis. The pollen of the Arabidopsis kinβγ mutant could not germinate on stigma, although it germinated normally in vitro. Further analysis revealed the hydration of kinβγ mutant pollen on the stigma was compromised. However, adding water to the stigma promoted the germination of the mutant pollen in vivo, suggesting that the compromised hydration of the mutant pollen led to its defective germination. In kinβγ mutant pollen, the structure of the mitochondria and peroxisomes was destroyed, and their numbers were significantly reduced compared with those in the wild type. Furthermore, we found that the kinβγ mutant exhibited reduced levels of reactive oxygen species (ROS) in pollen. The addition of H2O2in vitro partially compensated for the reduced water absorption of the mutant pollen, and reducing ROS levels in pollen by overexpressing Arabidopsis CATALASE 3 resulted in compromised hydration of pollen on the stigma. These results indicate that Arabidopsis KINβγ is critical for the regulation of ROS levels by mediating the biogenesis of mitochondria and peroxisomes in pollen, which is required for pollen–stigma interactions during pollination. After landing on the stigma, pollen grains germinate and create pollen tubes following adhesion and hydration processes, during which pollen–stigma interactions determine whether the pollen grains can germinate on the stigma. In recent years, the interaction mechanisms between the pollen and stigma have been studied extensively at the cellular and molecular level in self-incompatibility systems. However, few studies have focused on pollen–stigma interactions during self-compatible pollination. Arabidopsis thaliana provides an excellent system to study the interaction mechanisms between the pollen and stigma during self-compatible pollination. KINβγ is a plant-specific subunit of the SNF1-related protein kinase 1 complex. In this study, we identified an Arabidopsis kinβγ mutant showing defective pollen germination on the surface of the stigma but not on the culture medium, which resulted from the compromised hydration of pollen on the stigma. Further analysis revealed that the biogenesis of mitochondria and peroxisomes was impaired in this mutant, which reduced the levels of reactive oxygen species (ROS) in pollen. Application of H2O2 recovered the capability of pollen to undergo hydration in vitro. These results suggest that ROS signaling is involved in the regulation of pollen–stigma interactions during pollination. This study provides new insights into the mechanism underlying pollen–stigma interactions in self-compatible plant species.
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Affiliation(s)
- Xin-Qi Gao
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Chang Zhen Liu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Dan Dan Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Ting Ting Zhao
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Fei Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Xiao Na Jia
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Xin-Ying Zhao
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Xian Sheng Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- * E-mail:
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Nanjareddy K, Arthikala MK, Blanco L, Arellano ES, Lara M. Protoplast isolation, transient transformation of leaf mesophyll protoplasts and improved Agrobacterium-mediated leaf disc infiltration of Phaseolus vulgaris: tools for rapid gene expression analysis. BMC Biotechnol 2016; 16:53. [PMID: 27342637 PMCID: PMC4919892 DOI: 10.1186/s12896-016-0283-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/14/2016] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Phaseolus vulgaris is one of the most extensively studied model legumes in the world. The P. vulgaris genome sequence is available; therefore, the need for an efficient and rapid transformation system is more imperative than ever. The functional characterization of P. vulgaris genes is impeded chiefly due to the non-amenable nature of Phaseolus sp. to stable genetic transformation. Transient transformation systems are convenient and versatile alternatives for rapid gene functional characterization studies. Hence, the present work focuses on standardizing methodologies for protoplast isolation from multiple tissues and transient transformation protocols for rapid gene expression analysis in the recalcitrant grain legume P. vulgaris. RESULTS Herein, we provide methodologies for the high-throughput isolation of leaf mesophyll-, flower petal-, hypocotyl-, root- and nodule-derived protoplasts from P. vulgaris. The highly efficient polyethylene glycol-mannitol magnesium (PEG-MMG)-mediated transformation of leaf mesophyll protoplasts was optimized using a GUS reporter gene. We used the P. vulgaris SNF1-related protein kinase 1 (PvSnRK1) gene as proof of concept to demonstrate rapid gene functional analysis. An RT-qPCR analysis of protoplasts that had been transformed with PvSnRK1-RNAi and PvSnRK1-OE vectors showed the significant downregulation and ectopic constitutive expression (overexpression), respectively, of the PvSnRK1 transcript. We also demonstrated an improved transient transformation approach, sonication-assisted Agrobacterium-mediated transformation (SAAT), for the leaf disc infiltration of P. vulgaris. Interestingly, this method resulted in a 90 % transformation efficiency and transformed 60-85 % of the cells in a given area of the leaf surface. The constitutive expression of YFP further confirmed the amenability of the system to gene functional characterization studies. CONCLUSIONS We present simple and efficient methodologies for protoplast isolation from multiple P. vulgaris tissues. We also provide a high-efficiency and amenable method for leaf mesophyll transformation for rapid gene functional characterization studies. Furthermore, a modified SAAT leaf disc infiltration approach aids in validating genes and their functions. Together, these methods help to rapidly unravel novel gene functions and are promising tools for P. vulgaris research.
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Affiliation(s)
- Kalpana Nanjareddy
- />Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Universidad Nacional Autónoma de México (UNAM), León, C.P.37684 Guanajuato Mexico
| | - Manoj-Kumar Arthikala
- />Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Universidad Nacional Autónoma de México (UNAM), León, C.P.37684 Guanajuato Mexico
| | - Lourdes Blanco
- />Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Universidad Nacional Autónoma de México (UNAM), León, C.P.37684 Guanajuato Mexico
- />Instituto de Fisiología Celular, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Coyoacan, Ciudad de México C.P. 62210 Mexico
| | - Elizabeth S. Arellano
- />Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa Maria, Cuernavaca, Morelos 62100 Mexico
| | - Miguel Lara
- />Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores, Universidad Nacional Autónoma de México (UNAM), León, C.P.37684 Guanajuato Mexico
- />Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Coyoacan, Ciudad de México C.P. 04510 Mexico
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Staroske N, Conrad U, Kumlehn J, Hensel G, Radchuk R, Erban A, Kopka J, Weschke W, Weber H. Increasing abscisic acid levels by immunomodulation in barley grains induces precocious maturation without changing grain composition. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:2675-87. [PMID: 26951372 PMCID: PMC4861016 DOI: 10.1093/jxb/erw102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Abscisic acid (ABA) accumulates in seeds during the transition to the seed filling phase. ABA triggers seed maturation, storage activity, and stress signalling and tolerance. Immunomodulation was used to alter the ABA status in barley grains, with the resulting transgenic caryopses responding to the anti-ABA antibody gene expression with increased accumulation of ABA. Calculation of free versus antibody-bound ABA reveals large excess of free ABA, increasing signficantly in caryopses from 10 days after fertilization. Metabolite and transcript profiling in anti-ABA grains expose triggered and enhanced ABA-functions such as transcriptional up-regulation of sucrose-to-starch metabolism, storage protein synthesis and ABA-related signal transduction. Thus, enhanced ABA during transition phases induces precocious maturation but negatively interferes with growth and development. Anti-ABA grains display broad constitutive gene induction related to biotic and abiotic stresses. Most of these genes are ABA- and/or stress-inducible, including alcohol and aldehyde dehydrogenases, peroxidases, chaperones, glutathione-S-transferase, drought- and salt-inducible proteins. Conclusively, ABA immunomodulation results in precocious ABA accumulation that generates an integrated response of stress and maturation. Repression of ABA signalling, occurring in anti-ABA grains, potentially antagonizes effects caused by overshooting production. Finally, mature grain weight and composition are unchanged in anti-ABA plants, although germination is somewhat delayed. This indicates that anti-ABA caryopses induce specific mechanisms to desensitize ABA signalling efficiently, which finally yields mature grains with nearly unchanged dry weight and composition. Such compensation implicates the enormous physiological and metabolic flexibilities of barley grains to adjust effects of unnaturally high ABA amounts in order to ensure and maintain proper grain development.
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Affiliation(s)
- Nicole Staroske
- Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, D-06466 Gatersleben, Germany
| | - Udo Conrad
- Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, D-06466 Gatersleben, Germany
| | - Jochen Kumlehn
- Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, D-06466 Gatersleben, Germany
| | - Götz Hensel
- Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, D-06466 Gatersleben, Germany
| | - Ruslana Radchuk
- Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, D-06466 Gatersleben, Germany
| | - Alexander Erban
- Max-Planck-Institute of Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany
| | - Joachim Kopka
- Max-Planck-Institute of Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany
| | - Winfriede Weschke
- Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, D-06466 Gatersleben, Germany
| | - Hans Weber
- Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, D-06466 Gatersleben, Germany
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Crozet P, Margalha L, Butowt R, Fernandes N, Elias CA, Orosa B, Tomanov K, Teige M, Bachmair A, Sadanandom A, Baena-González E. SUMOylation represses SnRK1 signaling in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 85:120-133. [PMID: 26662259 PMCID: PMC4817235 DOI: 10.1111/tpj.13096] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/12/2015] [Accepted: 11/24/2015] [Indexed: 05/10/2023]
Abstract
The SnRK1 protein kinase balances cellular energy levels in accordance with extracellular conditions and is thereby key for plant stress tolerance. In addition, SnRK1 has been implicated in numerous growth and developmental processes from seed filling and maturation to flowering and senescence. Despite its importance, the mechanisms that regulate SnRK1 activity are poorly understood. Here, we demonstrate that the SnRK1 complex is SUMOylated on multiple subunits and identify SIZ1 as the E3 Small Ubiquitin-like Modifier (SUMO) ligase responsible for this modification. We further show that SnRK1 is ubiquitinated in a SIZ1-dependent manner, causing its degradation through the proteasome. In consequence, SnRK1 degradation is deficient in siz1-2 mutants, leading to its accumulation and hyperactivation of SnRK1 signaling. Finally, SnRK1 degradation is strictly dependent on its activity, as inactive SnRK1 variants are aberrantly stable but recover normal degradation when expressed as SUMO mimetics. Altogether, our data suggest that active SnRK1 triggers its own SUMOylation and degradation, establishing a negative feedback loop that attenuates SnRK1 signaling and prevents detrimental hyperactivation of stress responses.
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Affiliation(s)
- Pierre Crozet
- Rua da Quinta Grande 6, Instituto Gulbenkian de Ciência, Oeiras 2780-156, Portugal
| | - Leonor Margalha
- Rua da Quinta Grande 6, Instituto Gulbenkian de Ciência, Oeiras 2780-156, Portugal
| | - Rafal Butowt
- Rua da Quinta Grande 6, Instituto Gulbenkian de Ciência, Oeiras 2780-156, Portugal
| | - Noémia Fernandes
- Rua da Quinta Grande 6, Instituto Gulbenkian de Ciência, Oeiras 2780-156, Portugal
| | - Carlos A. Elias
- Rua da Quinta Grande 6, Instituto Gulbenkian de Ciência, Oeiras 2780-156, Portugal
| | - Beatriz Orosa
- School of Biological and Biomedical Sciences, University of Durham, Durham, UK
| | - Konstantin Tomanov
- Department of Biochemistry and Cell Biology, Max F. Perutz Laboratories, Vienna BioCenter, University of Vienna, Vienna A-1030, Austria
| | - Markus Teige
- Department of Ecogenomics and Systems Biology, University of Vienna, Althanstr. 14, Vienna A-1090, Austria
| | - Andreas Bachmair
- Department of Biochemistry and Cell Biology, Max F. Perutz Laboratories, Vienna BioCenter, University of Vienna, Vienna A-1030, Austria
| | - Ari Sadanandom
- School of Biological and Biomedical Sciences, University of Durham, Durham, UK
| | - Elena Baena-González
- Rua da Quinta Grande 6, Instituto Gulbenkian de Ciência, Oeiras 2780-156, Portugal
- For correspondence ()
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Plant SnRK1 Kinases: Structure, Regulation, and Function. EXPERIENTIA SUPPLEMENTUM 2016; 107:403-438. [DOI: 10.1007/978-3-319-43589-3_17] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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46
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Coello P, Martínez-Barajas E. SnRK1 is differentially regulated in the cotyledon and embryo axe of bean (Phaseolus vulgaris L) seeds. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2014; 80:153-9. [PMID: 24762788 DOI: 10.1016/j.plaphy.2014.03.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 03/30/2014] [Indexed: 05/25/2023]
Abstract
SnRK1 activity is developmentally regulated in bean seeds and exhibits a transient increase with the highest value at 20 days after anthesis (DAA), which coincides with the beginning of protein and starch accumulation. The catalytic subunit of SnRK1 shows a consistent decrease throughout the seed development period. However, by 15 DAA a significant proportion of the catalytic subunit appears phosphorylated. The increase in activity and phosphorylation of the catalytic subunit coincides with a decrease in hexoses. However, SnRK1 activity is differentially regulated in the cotyledon and embryo axe, where a larger proportion of the catalytic subunit is phosphorylated. SnRK1 obtained from endosperm extract is inhibited by T6P and to a lesser extent by ADPG and UDPG, whereas the enzyme isolated from embryo is virtually insensitive to T6P but exhibits some inhibition by ADPG and UDPG. In cotyledon extracts, the effects of T6P and ADPG on SnRK1 activity are additive, whereas in embryo extract, T6P inhibits the enzyme only when ADPG is present. After fractionation on Sephacryl-S300, SnRK1 activity obtained from cotyledon extracts is detected as a single peak associated with a molecular weight of 250 kDa whereas that obtained form embryo axe extracts detected as 2 peaks associated with molecular weight of 250 and 180 kDa. In both cases, the catalytic subunit exhibits a wide distribution but is concentrated in the fractions with the highest activity. To analyse the composition of the complex, cotyledon and embryo extracts were treated with a reversible crosslinker (DSP). DSP induced the formation of complexes with molecular weights of 97 and 180 kDa in the cotyledon and embryo extracts, respectively. Since all the phosphorylated catalytic subunit is present in the complexes induced by DSP, it appears that the phosphorylation favors its interaction with other proteins.
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Affiliation(s)
- Patricia Coello
- Departamento de Bioquímica, Facultad de Química-UNAM, México 04510, D.F, Mexico
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Tsai AYL, Gazzarrini S. Trehalose-6-phosphate and SnRK1 kinases in plant development and signaling: the emerging picture. FRONTIERS IN PLANT SCIENCE 2014; 5:119. [PMID: 24744765 PMCID: PMC3978363 DOI: 10.3389/fpls.2014.00119] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 03/12/2014] [Indexed: 05/19/2023]
Abstract
Carbohydrates, or sugars, regulate various aspects of plant growth through modulation of cell division and expansion. Besides playing essential roles as sources of energy for growth and as structural components of cells, carbohydrates also regulate the timing of expression of developmental programs. The disaccharide trehalose is used as an energy source, as a storage and transport molecule for glucose, and as a stress-responsive compound important for cellular protection during stress in all kingdoms. Trehalose, however, is found in very low amounts in most plants, pointing to a signaling over metabolic role for this non-reducing disaccharide. In the last decade, trehalose-6-phosphate (T6P), an intermediate in trehalose metabolism, has been shown to regulate embryonic and vegetative development, flowering time, meristem determinacy, and cell fate specification in plants. T6P acts as a global regulator of metabolism and transcription promoting plant growth and triggering developmental phase transitions in response to sugar availability. Among the T6P targets are members of the Sucrose-non-fermenting1-related kinase1 (SnRK1) family, which are sensors of energy availability and inhibit plant growth and development during metabolic stress to maintain energy homeostasis. In this review, we will discuss the opposite roles of the sugar metabolite T6P and the SnRK1 kinases in the regulation of developmental phase transitions in response to carbohydrate levels. We will focus on how these two global regulators of metabolic processes integrate environmental cues and interact with hormonal signaling pathways to modulate plant development.
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Affiliation(s)
| | - Sonia Gazzarrini
- Department of Biological Sciences, University of TorontoToronto, ON, Canada
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48
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Huang Y, Li CY, Qi Y, Park S, Gibson SI. SIS8, a putative mitogen-activated protein kinase kinase kinase, regulates sugar-resistant seedling development in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2014; 77:577-88. [PMID: 24320620 DOI: 10.1111/tpj.12404] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/21/2013] [Accepted: 12/03/2013] [Indexed: 05/21/2023]
Abstract
Sugar signaling pathways have been evolutionarily conserved among eukaryotes and are postulated to help regulate plant growth, development and responses to environmental cues. Forward genetic screens have identified sugar signaling or response mutants. Here we report the identification and characterization of Arabidopsis thaliana sugar insensitive8 (sis8) mutants, which display a sugar-resistant seedling development phenotype. Unlike many other sugar insensitive mutants, sis8 mutants exhibit wild-type responses to the inhibitory effects of abscisic acid and paclobutrazol (an inhibitor of gibberellin biosynthesis) on seed germination. Positional cloning of the SIS8 gene revealed that it encodes a putative mitogen-activated protein kinase kinase kinase (MAPKKK; At1g73660). SIS8mRNA is expressed ubiquitously among Arabidopsis organs. A UDP-glucosyltransferase, UGT72E1 (At3g50740), was identified as an interacting partner of SIS8 based on a yeast two-hybrid screen and in planta bimolecular fluorescence complementation. Both SIS8-yellow fluorescent protein (YFP) and UGT72E1-YFP fusion proteins localize to the nucleus when transiently expressed in tobacco leaf cells. T-DNA insertions in At3g50740 cause a sugar-insensitive phenotype. These results indicate that SIS8, a putative MAPKKK, is a regulator of sugar response in Arabidopsis and interacts with a UDP-glucosyltransferase in the nucleus.
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Affiliation(s)
- Yadong Huang
- Department of Plant Biology, University of Minnesota, St Paul, MN, 55108, USA
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49
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Ávila-Castañeda A, Gutiérrez-Granados N, Ruiz-Gayosso A, Sosa-Peinado A, Martínez-Barajas E, Coello P. Structural and functional basis for starch binding in the SnRK1 subunits AKINβ2 and AKINβγ. FRONTIERS IN PLANT SCIENCE 2014; 5:199. [PMID: 24904601 PMCID: PMC4032982 DOI: 10.3389/fpls.2014.00199] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 04/24/2014] [Indexed: 05/20/2023]
Abstract
Specialized carbohydrate-binding domains, the Starch-Binding Domain (SBD) and the Glycogen Binding Domain (GBD), are motifs of approximately 100 amino acids directly or indirectly associated with starch or glycogen metabolism. Members of the regulatory β subunit of the heterotrimeric complex AMPK/SNF1/SnRK1 contain an SBD or GBD. In Arabidopsis thaliana, the β regulatory subunit AKINβ2 and a γ-type subunit, AKINβγ, also have an SBD. In this work, we compared the SBD of AKINβ2 and AKINβγ with the GBD present in rat AMPKβ1 and demonstrated that they conserved the same overall topology. The majority of the amino acids identified in the protein-carbohydrate interactions in the rat AMPKβ1 are conserved in the two plant proteins. In AKINβγ, there is an insertion of three amino acids that creates a loop adjacent to one of the conserved tryptophan residues. Functionally, the SBD from AKINβγ and AKINβ2 could bind starch, but there was an important difference in the association when an amylose/amylopectin (A/A) mixture was used. The physiological relevance of binding to starch was clear for AKINβγ, because immunolocalization experiments identified this protein inside the chloroplast. SnRK1 activity was not affected by the addition of A/A to the reaction mixture. However, addition of starch inhibited the activity 85%. Furthermore, proteins associated with A/A and starch in an in vitro-binding assay accounted for 10-20% of total SnRK1 kinase activity. Interestingly, the identification of the SnRK1 subunits associated to the protein-carbohydrate complex indicated that only the catalytic subunits, AKIN10 and AKIN11, and the regulatory subunit AKINβγ were present. These results suggest that a dimer formed between either catalytic subunit and AKINβγ could be associated with the A/A mixture in its active form but the same subunits are inactivated when binding to starch.
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Affiliation(s)
- Alejandra Ávila-Castañeda
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de MéxicoMéxico City, México
| | - Natalia Gutiérrez-Granados
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de MéxicoMéxico City, México
| | - Ana Ruiz-Gayosso
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de MéxicoMéxico City, México
| | - Alejandro Sosa-Peinado
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de MéxicoMéxico City, México
| | - Eleazar Martínez-Barajas
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de MéxicoMéxico City, México
| | - Patricia Coello
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de MéxicoMéxico City, México
- *Correspondence: Patricia Coello, Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510 D.F., México e-mail:
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50
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Coello P, Martínez-Barajas E. The activity of SnRK1 is increased in Phaseolus vulgaris seeds in response to a reduced nutrient supply. FRONTIERS IN PLANT SCIENCE 2014; 5:196. [PMID: 24860586 PMCID: PMC4030202 DOI: 10.3389/fpls.2014.00196] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Accepted: 04/23/2014] [Indexed: 05/11/2023]
Abstract
Phaseolus vulgaris seeds can grow and develop at the expense of the pod reserves after the fruits have been removed from the plant (Fountain etal., 1989). Because this process involves sensing the reduction of nutrients and the remobilisation of pod reserves, we investigated the effect on sucrose non-fermenting related kinase 1 (SnRK1) activity during this process. Bean fruits removed from the plant at 20 days after flowering (DAF) demonstrated active remobilisation of nutrients from the pod to the seeds. After 5 days, the pod dry weight was reduced by 50%. The process was characterized by a rapid degradation of starch, with the greatest decrease observed on day 1 after the fruits were removed. The pod nutrients were insufficient for the needs of all the seeds, and only some seeds continued their development. Those seeds exhibited a transient reduction in sucrose levels on day 1 after the fruits were removed. However, the normal level of sucrose was recovered, and the rate of starch synthesis was identical to that of a seed developed under normal conditions. Removing the fruits from the plant had no effect on the activity of SnRK1 in the pods, whereas in the seeds, the activity was increased by 35%. Simultaneously, a large reduction in seed sucrose levels was observed. The increase in SnRK1 activity was observed in both the cotyledon and embryo axes, but it was higher in the cotyledon. At 20-25 DAF, cotyledons actively accumulate storage materials. It is possible that the increase in SnRK1 activity observed in seeds developed in fruits that have been removed from the plant is part of the mechanism required for nutrient remobilisation under conditions of stress.
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Affiliation(s)
| | - Eleazar Martínez-Barajas
- *Correspondence: Eleazar Martínez-Barajas, Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México, Mexico, D.F. 04510, Mexico e-mail:
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