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Zhao X, Wang Q, Yan C, Sun Q, Wang J, Li C, Yuan C, Mou Y, Shan S. The bHLH transcription factor AhbHLH121 improves salt tolerance in peanut. Int J Biol Macromol 2024; 256:128492. [PMID: 38035960 DOI: 10.1016/j.ijbiomac.2023.128492] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/02/2023]
Abstract
Plants have developed a number of protective mechanisms to respond to salt and other stresses. Previous studies have shown that the basic helix-loop-helix (bHLH) transcription factor AhbHLH121 plays a crucial role in the response to abiotic stresses in peanut, but the mechanisms and functions related to AhbHLH121 remain unclear. In the current research, AhbHLH121 was induced by salt treatment. Overexpression of AhbHLH121 improved salt resistance, whereas silencing AhbHLH121 resulted in the inverse correlation. Our results also demonstrated that overexpression of AhbHLH121 results in greater activity of antioxidant enzymes under stress condition by promoting the expression of the genes for peroxidase, catalase and superoxide dismutase (AhPOD, AhCAT and AhSOD), indicating enhanced scavenging of reactive oxygen species. Further analysis including Yeast one-hybrid (Y1H) assays and electrophoretic mobility shift assays (EMSAs), suggested that AhbHLH121 can bind directly to the G/E-box regions of the AhPOD, AhCAT and AhSOD promoters, thereby promoting their expression and leading to improved antioxidant enzyme activity. Our research improves the understanding of the mechanisms that allow this peanut bHLH transcription factor to improve abiotic tolerance, and provides valuable gene resources for breeding programs to promote salt stress resistance.
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Affiliation(s)
- Xiaobo Zhao
- Shandong Peanut Research Institute, Qingdao 266100, China.
| | - Qi Wang
- Shandong Peanut Research Institute, Qingdao 266100, China
| | - Caixia Yan
- Shandong Peanut Research Institute, Qingdao 266100, China
| | - Quanxi Sun
- Shandong Peanut Research Institute, Qingdao 266100, China
| | - Juan Wang
- Shandong Peanut Research Institute, Qingdao 266100, China
| | - Chunjuan Li
- Shandong Peanut Research Institute, Qingdao 266100, China
| | - Cuiling Yuan
- Shandong Peanut Research Institute, Qingdao 266100, China
| | - Yifei Mou
- Shandong Peanut Research Institute, Qingdao 266100, China
| | - Shihua Shan
- Shandong Peanut Research Institute, Qingdao 266100, China.
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Alikhani-Koupaei M, Ehtesham Nia A. Reducing the sink/source ratio of on-date palm plants during fruit growth has physiological and biochemical impacts on the shift in source-sink limitations. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:7104-7116. [PMID: 37332084 DOI: 10.1002/jsfa.12795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 05/10/2023] [Accepted: 06/19/2023] [Indexed: 06/20/2023]
Abstract
BACKGROUND The present study examined the impact of reducing the 'sink' on the 'source' in On-palms with a bunch number greater than eight. The capacity of leaves and fruit, as well as assimilate loading and unloading in phloem, restrict plant growth and yield. The study evaluated yield components, as well as photosynthetic and hormonal feedback, resulting from source-sink relationships. RESULTS During the mid-Kimri, removing bunches from On-trees stabilized yield components and fruit size, suggesting that On-trees have a sink limitation. Bunch thinning boosted these indicators compared to normal trees with a bunch number between six and eight inclusive, indicating that On-trees had source limitations. In mid-Khalal, the treatments presented a type of source and sink limitation that is opposite to mid-Kimri. The thinning techniques addressed the source-sink limitation by adjusting the additional carbon allocation. This resulted in an increase of non-reducing sugars and starch in different organs, whereas reducing sugars decreased. These adjustments were made to reduce sucrose-phosphate synthase and sucrose synthase activity, raising invertase activity, lowering indole-3-acetic acid, zeatin, gibberellin, and abscisic acid hormone levels in fruits, as well as lowering trehalose production in organs. Levels of hormones, enzymes, and trehalose showed less variation during bunch thinning and source limitation compared to bunch removal and sink limitation. CONCLUSION At Rutab, thinning types demonstrated the source limitation of On-trees. Bunch removal and bunch thinning by removing the source-sink limitation had the greatest effect on increasing yield components and fruit size, respectively. To improve the quality and quantity of fruit, it is important to use both thinning techniques simultaneously. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Majid Alikhani-Koupaei
- Department of Plant Production Technology, Faculty of Agriculture, Higher Education Complex of Saravan, Saravan, Iran
| | - Abdollah Ehtesham Nia
- Department of Horticultural Sciences, Faculty of Agriculture, Lorestan University, Khorramabad, Iran
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Ye N, Wang Y, Yu H, Qin Z, Zhang J, Duan M, Liu L. Abscisic Acid Enhances Trehalose Content via OsTPP3 to Improve Salt Tolerance in Rice Seedlings. PLANTS (BASEL, SWITZERLAND) 2023; 12:2665. [PMID: 37514279 PMCID: PMC10383865 DOI: 10.3390/plants12142665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/13/2023] [Accepted: 07/15/2023] [Indexed: 07/30/2023]
Abstract
Salt stress is one of the major environmental stresses that imposes constraints to plant growth and production. Abscisic acid (ABA) has been well-proven to function as a central integrator in plant under salt stress, and trehalose (Tre) has emerged as an excellent osmolyte to induce salt tolerance. However, the interacting mechanism between ABA and Tre in rice seedlings under salt stress is still obscure. Here, we found that the application of exogenous Tre significantly promoted the salt tolerance of rice seedlings by enhancing the activities of antioxidant enzymes. In addition, the expression of OsNCED3 was significantly induced by salt stress. The overexpression of the OsNCED3 gene enhanced the salt tolerance, while the knockout of OsNCED3 reduced the salt tolerance of the rice seedlings. Metabolite analysis revealed that the Tre content was increased in the OsNCED3-overexpressing seedlings and reduced in the nced3 mutant. The application of both ABA and Tre improved the salt tolerance of the nced3 mutant when compared with the WT seedling. OsTPP3 was found to be induced by both the ABA and salt treatments. Consistent with the OsNCED3 gene, the overexpression of OsTPP3 enhanced salt tolerance while the knockout of OsTPP3 reduced the salt tolerance of the rice seedlings. In addition, the Tre content was also higher in the OsTPP3-overexpressing seedling and lower in the tpp3 mutant seedling than the WT plant. The application of exogenous Tre also enhanced the salt tolerance of the tpp3 mutant plant. Overall, our results demonstrate that salt-increased ABA activated the expression of OsTPP3, which resulted in elevated Tre content and thus an improvement in the salt tolerance of rice seedlings.
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Affiliation(s)
- Nenghui Ye
- Hunan Provincial Key Laboratory of Rice Stress Biology, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
- Key Laboratory of Crop Physiology and Molecular Biology, Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Yuxing Wang
- Hunan Provincial Key Laboratory of Rice Stress Biology, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Huihui Yu
- Hunan Provincial Key Laboratory of Rice Stress Biology, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Zhonge Qin
- Hunan Provincial Key Laboratory of Rice Stress Biology, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong 999077, China
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong 999077, China
| | - Meijuan Duan
- Hunan Provincial Key Laboratory of Rice Stress Biology, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
- Key Laboratory of Crop Physiology and Molecular Biology, Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Ling Liu
- Hunan Provincial Key Laboratory of Rice Stress Biology, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
- Key Laboratory of Crop Physiology and Molecular Biology, Ministry of Education, Hunan Agricultural University, Changsha 410128, China
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Yang T, Wu X, Wang W, Wu Y. Regulation of seed storage protein synthesis in monocot and dicot plants: A comparative review. MOLECULAR PLANT 2023; 16:145-167. [PMID: 36495013 DOI: 10.1016/j.molp.2022.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/27/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Seeds are a major source of nutrients for humans and animal livestock worldwide. With improved living standards, high nutritional quality has become one of the main targets for breeding. Storage protein content in seeds, which is highly variable depending on plant species, serves as a pivotal criterion of seed nutritional quality. In the last few decades, our understanding of the molecular genetics and regulatory mechanisms of storage protein synthesis has greatly advanced. Here, we systematically and comprehensively summarize breakthroughs on the conservation and divergence of storage protein synthesis in dicot and monocot plants. With regard to storage protein accumulation, we discuss evolutionary origins, developmental processes, characteristics of main storage protein fractions, regulatory networks, and genetic modifications. In addition, we discuss potential breeding strategies to improve storage protein accumulation and provide perspectives on some key unanswered problems that need to be addressed.
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Affiliation(s)
- Tao Yang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Xingguo Wu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200233, China
| | - Wenqin Wang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200233, China
| | - Yongrui Wu
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China.
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Li Z, Liu S, Zhu T, An X, Wei X, Zhang J, Wu S, Dong Z, Long Y, Wan X. The Loss-Function of the Male Sterile Gene ZmMs33/ZmGPAT6 Results in Severely Oxidative Stress and Metabolic Disorder in Maize Anthers. Cells 2022; 11:cells11152318. [PMID: 35954161 PMCID: PMC9367433 DOI: 10.3390/cells11152318] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/23/2022] [Accepted: 07/25/2022] [Indexed: 02/04/2023] Open
Abstract
In plants, oxidative stress and metabolic reprogramming frequently induce male sterility, however our knowledge of the underlying molecular mechanism is far from complete. Here, a maize genic male-sterility (GMS) mutant (ms33-6038) with a loss-of-function of the ZmMs33 gene encoding glycerol-3-phosphate acyltransferase 6 (GPAT6) displayed severe deficiencies in the development of a four-layer anther wall and microspores and excessive reactive oxygen species (ROS) content in anthers. In ms33-6038 anthers, transcriptome analysis identified thousands of differentially expressed genes that were functionally enriched in stress response and primary metabolism pathways. Further investigation revealed that 64 genes involved in ROS production, scavenging, and signaling were specifically changed in expression levels in ms33-6038 anthers compared to the other five investigated GMS lines. The severe oxidative stress triggered premature tapetal autophagy and metabolic reprogramming mediated mainly by the activated SnRK1-bZIP pathway, as well as the TOR and PP2AC pathways, proven by transcriptome analysis. Furthermore, 20 reported maize GMS genes were altered in expression levels in ms33-6038 anthers. The excessive oxidative stress and the metabolic reprogramming resulted in severe phenotypic deficiencies in ms33-6038 anthers. These findings enrich our understanding of the molecular mechanisms by which ROS and metabolic homeostasis impair anther and pollen development in plants.
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Affiliation(s)
- Ziwen Li
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
| | - Shuangshuang Liu
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
| | - Taotao Zhu
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
| | - Xueli An
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
| | - Xun Wei
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
| | - Juan Zhang
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
| | - Suowei Wu
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
| | - Zhenying Dong
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
| | - Yan Long
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
- Correspondence: (Y.L.); (X.W.); Tel.: +86-158-1133-2686 (Y.L.); +86-186-0056-1850 (X.W.)
| | - Xiangyuan Wan
- Shunde Graduate School, Zhongzhi International Institute of Agricultural Biosciences, Research Center of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100024, China; (Z.L.); (S.L.); (T.Z.); (X.A.); (X.W.); (J.Z.); (S.W.); (Z.D.)
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Beijing International Science and Technology Cooperation Base of Bio-Tech Breeding, Beijing Solidwill Sci-Tech Co., Ltd., Beijing 100192, China
- Correspondence: (Y.L.); (X.W.); Tel.: +86-158-1133-2686 (Y.L.); +86-186-0056-1850 (X.W.)
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EfABI4 Transcription Factor Is Involved in the Regulation of Starch Biosynthesis in Euryale ferox Salisb Seeds. Int J Mol Sci 2022; 23:ijms23147598. [PMID: 35886946 PMCID: PMC9317497 DOI: 10.3390/ijms23147598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/04/2022] [Accepted: 07/08/2022] [Indexed: 02/01/2023] Open
Abstract
Starch is the final product of photosynthesis and the main storage form in plants. Studies have shown that there is a close synergistic regulatory relationship between ABA signal transduction and starch biosynthesis. In this study, we employed RNA sequencing (RNA-Seq) to investigate transcriptomic changes of the Euryale ferox seeds treated by exogenous ABA. The differentially expressed genes engaged in the “Starch and sucrose” and “TCA cycle” pathway. Furthermore, the key transcription factor EfABI4 in ABA signaling pathway and the key genes of starch biosynthesis (EfDBE1, EfSBE2, EfSS1, EfSS2, EfSS3, EfSS4 and EfGBSS1) were significantly up-regulated. Further, the Euryale ferox plant was treated with ABA, it was found that the total starch content of Euryale ferox seeds at different development stages was significantly higher than that of the control, and the key genes of starch synthesis in Euryale ferox seeds were also significantly up-regulated. Finally, yeast one-hybrid and dual luciferase assay proved that EfABI4 can promote the expression of EfSS1 by directly binding to its promoter. Subcellular localization results showed that EfABI4 protein was located at the nucleus and EfSS1 protein was located in the cytomembrane. These findings revealed that ABA promotes starch synthesis and accumulation by mediating EfABI4 to directly promote EfSS1 gene expression, which is helpful for understanding starch synthesis in seeds.
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Parrilla J, Medici A, Gaillard C, Verbeke J, Gibon Y, Rolin D, Laloi M, Finkelstein RR, Atanassova R. Grape ASR Regulates Glucose Transport, Metabolism and Signaling. Int J Mol Sci 2022; 23:ijms23116194. [PMID: 35682874 PMCID: PMC9181829 DOI: 10.3390/ijms23116194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/24/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
To decipher the mediator role of the grape Abscisic acid, Stress, Ripening (ASR) protein, VvMSA, in the pathways of glucose signaling through the regulation of its target, the promoter of hexose transporter VvHT1, we overexpressed and repressed VvMSA in embryogenic and non-embryogenic grapevine cells. The embryogenic cells with organized cell proliferation were chosen as an appropriate model for high sensitivity to the glucose signal, due to their very low intracellular glucose content and low glycolysis flux. In contrast, the non-embryogenic cells displaying anarchic cell proliferation, supported by high glycolysis flux and a partial switch to fermentation, appeared particularly sensitive to inhibitors of glucose metabolism. By using different glucose analogs to discriminate between distinct pathways of glucose signal transduction, we revealed VvMSA positioning as a transcriptional regulator of the glucose transporter gene VvHT1 in glycolysis-dependent glucose signaling. The effects of both the overexpression and repression of VvMSA on glucose transport and metabolism via glycolysis were analyzed, and the results demonstrated its role as a mediator in the interplay of glucose metabolism, transport and signaling. The overexpression of VvMSA in the Arabidopsis mutant abi8 provided evidence for its partial functional complementation by improving glucose absorption activity.
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Affiliation(s)
- Jonathan Parrilla
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
| | - Anna Medici
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
- Institut des Sciences des Plantes de Montpellier (IPSiM), UMR CNRS/INRAE/Institut Agro/Université de Montpellier, 2 Place Pierre Viala, 34000 Montpellier, France
| | - Cécile Gaillard
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
| | - Jérémy Verbeke
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
- GReD-UMR CNRS 6293/INSERM U1103, CRBC, Faculté de Médecine, Université Clermont-Auvergne, 28 Place Henri Dunant, 63001 Clermont-Ferrand, France
| | - Yves Gibon
- UMR 1332 Biologie du Fruit et Pathologie (BFP), INRA, Université de Bordeaux, 33882 Bordeaux, France; (Y.G.); (D.R.)
| | - Dominique Rolin
- UMR 1332 Biologie du Fruit et Pathologie (BFP), INRA, Université de Bordeaux, 33882 Bordeaux, France; (Y.G.); (D.R.)
| | - Maryse Laloi
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
| | - Ruth R. Finkelstein
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA 93106, USA;
| | - Rossitza Atanassova
- UMR CNRS 7267 Écologie et Biologie des Interactions, Équipe Sucres & Echanges Végétaux Environnement, Université de Poitiers, 3 Rue Jacques Fort, 86073 Poitiers, France; (J.P.); (A.M.); (C.G.); (J.V.); (M.L.)
- Correspondence:
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Teng Z, Yu H, Wang G, Meng S, Liu B, Yi Y, Chen Y, Zheng Q, Liu L, Yang J, Duan M, Zhang J, Ye N. Synergistic interaction between ABA and IAA due to moderate soil drying promotes grain filling of inferior spikelets in rice. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 109:1457-1472. [PMID: 34921476 DOI: 10.1111/tpj.15642] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 12/05/2021] [Accepted: 12/11/2021] [Indexed: 06/14/2023]
Abstract
Poor grain filling of inferior spikelets is becoming a severe problem in some super rice varieties with large panicles. Moderate soil drying (MD) after pollination has been proven to be a practical strategy to promote grain filling. However, the molecular mechanisms underlying this phenomenon remain largely unexplored. Here, transcriptomic analysis of the most active grain filling stage revealed that both starch metabolism and phytohormone signaling were significantly promoted by MD treatment, accompanied by increased enzyme activities of starch synthesis and elevated abscisic acid (ABA) and indole-3-acetic acid (IAA) content in the inferior spikelet. Moreover, the IAA biosynthesis genes OsYUC11 and OsTAR2 were upregulated, while OsIAA29 and OsIAA24, which encode two repressors of auxin signaling, were downregulated by MD, implying a regulation of both IAA biosynthesis and auxin signal transduction in the inferior spikelet by MD. A notable improvement in grain filling of the inferior spikelet was found in the aba8ox2 mutant, which is mutated in an ABA catabolism gene. In contrast, overexpression of OsABA8ox2 significantly reduced grain filling. Interestingly, not only the IAA content, but also the expression of IAA biosynthesis and auxin-responsive genes displayed a similar trend to that in the inferior spikelet under MD. In addition, several OsTPP genes were downregulated in the inferior spikelets of both MD/ABA-treated wild-type plants and the aba8ox2 mutant, resulting in lower trehalose content and higher levels of -6-phosphate (T6P), thereby increasing the expression of OsTAR2, a target of T6P. Taken together, our results suggest that the synergistic interaction of ABA-mediated accumulation of IAA promotes grain filling of inferior spikelets under MD.
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Affiliation(s)
- Zhenning Teng
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
- Hunan Provincial Key Laboratory of Rice Stress Biology, Hunan Agricultural University, Changsha, 410128, China
| | - Huihui Yu
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
- Hunan Provincial Key Laboratory of Rice Stress Biology, Hunan Agricultural University, Changsha, 410128, China
| | - Guanqun Wang
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong, China
| | - Shuan Meng
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
| | - Bohan Liu
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
| | - Yake Yi
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
| | - Yinke Chen
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
| | - Qin Zheng
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
| | - Ling Liu
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
| | - Jianchang Yang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou, Jiangsu, China
| | - Meijuan Duan
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
- Hunan Provincial Key Laboratory of Rice Stress Biology, Hunan Agricultural University, Changsha, 410128, China
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong, China
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Nenghui Ye
- College of Agriculture, Hunan Agricultural University, Changsha, 410128, China
- Hunan Provincial Key Laboratory of Rice Stress Biology, Hunan Agricultural University, Changsha, 410128, China
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NnABI4-Mediated ABA Regulation of Starch Biosynthesis in Lotus ( Nelumbo nucifera Gaertn). Int J Mol Sci 2021; 22:ijms222413506. [PMID: 34948298 PMCID: PMC8705639 DOI: 10.3390/ijms222413506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/04/2021] [Accepted: 12/14/2021] [Indexed: 11/17/2022] Open
Abstract
Starch is an important component in lotus. ABA is an important plant hormone, which plays a very crucial role in regulating plant starch synthesis. Using ‘MRH’ as experimental materials, the leaves were sprayed with exogenous ABA before the rhizome expansion. The results showed that stomatal conductance and transpiration rate decreased while net photosynthetic rate increased. The total starch content of the underground rhizome of lotus increased significantly. Meanwhile, qPCR results showed that the relative expression levels of NnSS1, NnSBE1 and NnABI4 were all upregulated after ABA treatment. Then, yeast one-hybrid and dual luciferase assay suggested that NnABI4 protein can promote the expression of NnSS1 by directly binding to its promoter. In addition, subcellular localization results showed that NnABI4 encodes a nuclear protein, and NnSS1 protein was located in the chloroplast. Finally, these results indicate that ABA induced the upregulated expression of NnABI4, and NnABI4 promoted the expression of NnSS1 and thus enhanced starch accumulation in lotus rhizomes. This will provide a theoretical basis for studying the molecular mechanism of ABA regulating starch synthesis in plant.
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Li C, Yan C, Sun Q, Wang J, Yuan C, Mou Y, Shan S, Zhao X. The bHLH transcription factor AhbHLH112 improves the drought tolerance of peanut. BMC PLANT BIOLOGY 2021; 21:540. [PMID: 34784902 PMCID: PMC8594184 DOI: 10.1186/s12870-021-03318-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/04/2021] [Indexed: 05/12/2023]
Abstract
BACKGROUND Basic helix-loop-helix (bHLH) transcription factors (TFs) are one of the largest gene families in plants. They regulate gene expression through interactions with specific motifs in target genes. bHLH TFs are not only universally involved in plant growth but also play an important role in plant responses to abiotic stress. However, most members of this family have not been functionally characterized. RESULTS Here, we characterized the function of a bHLH TF in the peanut, AhHLH112, in response to drought stress. AhHLH112 is localized in the nucleus and it was induced by drought stress. The overexpression of this gene improves the drought tolerance of transgenic plants both in seedling and adult stages. Compared to wild-type plants, the transgenic plants accumulated less reactive oxygen species (ROS), accompanied by increased activity and transcript levels of antioxidant enzymes (superoxide dismutase, peroxidase and catalase). In addition, the WT plants demonstrated higher MDA concentration levels and higher water loss rate than the transgenic plants under drought treatment. The Yeast one-hybrid result also demonstrates that AhbHLH112 directly and specifically binds to and activates the promoter of the peroxidase (POD) gene. Besides, overexpression of AhHLH112 improved ABA level under drought condition, and elevated the expression of genes associated with ABA biosynthesis and ABA responding, including AtNCED3 and AtRD29A. CONCLUSIONS Drawing on the results of our experiments, we propose that, by improving ROS-scavenging ability, at least in part through the regulation of POD -mediated H2O2 homeostasis, and possibly participates in ABA-dependent stress-responding pathway, AhbHLH112 acts as a positive factor in drought stress tolerance.
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Affiliation(s)
- Chunjuan Li
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
| | - Caixia Yan
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
| | - Quanxi Sun
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
| | - Juan Wang
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
| | - Cuiling Yuan
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
| | - Yifei Mou
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
| | - Shihua Shan
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
| | - Xiaobo Zhao
- Department of Breeding, Shandong Peanut Research Institute, Qingdao, China
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11
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Fichtner F, Lunn JE. The Role of Trehalose 6-Phosphate (Tre6P) in Plant Metabolism and Development. ANNUAL REVIEW OF PLANT BIOLOGY 2021; 72:737-760. [PMID: 33428475 DOI: 10.1146/annurev-arplant-050718-095929] [Citation(s) in RCA: 106] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Trehalose 6-phosphate (Tre6P) has a dual function as a signal and homeostatic regulator of sucrose levels in plants. In source leaves, Tre6P regulates the production of sucrose to balance supply with demand for sucrose from growing sink organs. As a signal of sucrose availability, Tre6P influences developmental decisions that will affect future demand for sucrose, such as flowering, embryogenesis, and shoot branching, and links the growth of sink organs to sucrose supply. This involves complex interactions with SUCROSE-NON-FERMENTING1-RELATED KINASE1 that are not yet fully understood. Tre6P synthase, the enzyme that makes Tre6P, plays a key role in the nexus between sucrose and Tre6P, operating in the phloem-loading zone of leaves and potentially generating systemic signals for source-sink coordination. Many plants have large and diverse families of Tre6P phosphatase enzymes that dephosphorylate Tre6P, some of which have noncatalytic functions in plant development.
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Affiliation(s)
- Franziska Fichtner
- School of Biological Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia;
| | - John Edward Lunn
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany;
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12
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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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13
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Yu W, Zhao R, Wang L, Zhang S, Li R, Sheng J, Shen L. ABA signaling rather than ABA metabolism is involved in trehalose-induced drought tolerance in tomato plants. PLANTA 2019; 250:643-655. [PMID: 31144110 DOI: 10.1007/s00425-019-03195-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 05/16/2019] [Indexed: 05/03/2023]
Abstract
Trehalose increased drought tolerance of tomato plants, accompanied by reduced water loss and closed stomata, which was associated with the upregulated ABA signaling-related genes expression, but not in ABA accumulation. Drought is one of the principal abiotic stresses that negatively influence the growth of plant and yield. Trehalose has great agronomic potential to improve the stress tolerance of plants. However, little information is available on the role of ABA and its signaling components in trehalose-induced drought tolerance. The aim of this study is to elucidate the potential mechanism by which trehalose regulates ABA in response to drought stress. In this study, 6-week-old tomato (Solanum lycopersicum cv. Ailsa Craig) plants were treated with 0 or 15.0 mM trehalose solution. Results showed that trehalose treatment significantly enhanced drought tolerance of tomato plants, accompanied by encouraged stomatal closure and protected chloroplast ultrastructure. Compared with controls, trehalose-treated plants showed lower hydrogen peroxide content and higher antioxidant enzymes activities, which contributed to alleviate oxidative damage caused by drought. Moreover, trehalose treatment decreased ABA content, which was followed by the downregulation of ABA biosynthesis genes expression and the upregulation of ABA catabolism genes expression. In contrast, exogenous trehalose upregulated transcript levels of ABA signaling-related genes, including SlPYL1/3/4/5/6/7/9, SlSnRK2.3/4, SlAREB1/2, and SlDREB1. These results suggested that trehalose treatment enhanced drought tolerance of tomato plants, and it's ABA signaling rather than ABA metabolism that was involved in trehalose-induced drought tolerance in tomato plants. These findings provide evidence for the physiological role of trehalose and bring about a new understanding of the possible relationship between trehalose and ABA.
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Affiliation(s)
- Wenqing Yu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Ruirui Zhao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Liu Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Shujuan Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Rui Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Jiping Sheng
- School of Agricultural Economics and Rural Development, Renmin University of China, Beijing, 100872, China
| | - Lin Shen
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China.
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14
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Batista-Silva W, Medeiros DB, Rodrigues-Salvador A, Daloso DM, Omena-Garcia RP, Oliveira FS, Pino LE, Peres LEP, Nunes-Nesi A, Fernie AR, Zsögön A, Araújo WL. Modulation of auxin signalling through DIAGETROPICA and ENTIRE differentially affects tomato plant growth via changes in photosynthetic and mitochondrial metabolism. PLANT, CELL & ENVIRONMENT 2019; 42:448-465. [PMID: 30066402 DOI: 10.1111/pce.13413] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 07/17/2018] [Accepted: 07/20/2018] [Indexed: 06/08/2023]
Abstract
Auxin modulates a range of plant developmental processes including embryogenesis, organogenesis, and shoot and root development. Recent studies have shown that plant hormones also strongly influence metabolic networks, which results in altered growth phenotypes. Modulating auxin signalling pathways may therefore provide an opportunity to alter crop performance. Here, we performed a detailed physiological and metabolic characterization of tomato (Solanum lycopersicum) mutants with either increased (entire) or reduced (diageotropica-dgt) auxin signalling to investigate the consequences of altered auxin signalling on photosynthesis, water use, and primary metabolism. We show that reduced auxin sensitivity in dgt led to anatomical and physiological modifications, including altered stomatal distribution along the leaf blade and reduced stomatal conductance, resulting in clear reductions in both photosynthesis and water loss in detached leaves. By contrast, plants with higher auxin sensitivity (entire) increased the photosynthetic capacity, as deduced by higher Vcmax and Jmax coupled with reduced stomatal limitation. Remarkably, our results demonstrate that auxin-sensitive mutants (dgt) are characterized by impairments in the usage of starch that led to lower growth, most likely associated with decreased respiration. Collectively, our findings suggest that mutations in different components of the auxin signalling pathway specifically modulate photosynthetic and respiratory processes.
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Affiliation(s)
- Willian Batista-Silva
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - David B Medeiros
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Acácio Rodrigues-Salvador
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Danilo M Daloso
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Rebeca P Omena-Garcia
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Franciele Santos Oliveira
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Lilian Ellen Pino
- Departmento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Lázaro Eustáquio Pereira Peres
- Departmento de Ciências Biológicas, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Alisdair R Fernie
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Agustín Zsögön
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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15
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Functional identification of a rice trehalase gene involved in salt stress tolerance. Gene 2019; 685:42-49. [DOI: 10.1016/j.gene.2018.10.071] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 10/21/2018] [Accepted: 10/24/2018] [Indexed: 11/18/2022]
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16
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Fang Q, Wang Q, Mao H, Xu J, Wang Y, Hu H, He S, Tu J, Cheng C, Tian G, Wang X, Liu X, Zhang C, Luo K. AtDIV2, an R-R-type MYB transcription factor of Arabidopsis, negatively regulates salt stress by modulating ABA signaling. PLANT CELL REPORTS 2018; 37:1499-1511. [PMID: 30014159 DOI: 10.1007/s00299-018-2321-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/10/2018] [Indexed: 05/15/2023]
Abstract
AtDIV2 integrates ABA signaling to negatively regulate salt stress in Arabidopsis. AmDIV (DIVARICATA) is a functional MYB transcription factor (TF) that regulates ventral identity during floral development in Antirrhinum. There are six members of DIV homologs in Arabidopsis; however, the functions of these proteins are largely unknown. Here, we characterized an R-R-type MYB TF AtDIV2, which is involved in salt stress responses and abscisic acid (ABA) signaling. Although universally expressed in tissues, the nuclear-localized AtDIV2 appeared not to be involved in seedling development processes. However, upon exposure to salt stress and exogenous ABA, the transcripts of AtDIV2 are markedly increased in wild-type (Wt) plants. The loss-of-function mutant div2 displayed much more tolerance to salt stress, and several salt-responsive genes were up-regulated. In addition, the div2 mutant showed higher sensitivity to ABA during seed germination. And the germination variance between the Wt and div2 mutant cannot be rectified by treatment with both ABA and sodium tungstate at the same time. ELISA results showed that the endogenous ABA content in the div2 mutant is clearly increased than that in Wt plants. Furthermore, the transcriptional expressions of several ABA-related genes, including ABA1 and ABI3, were elevated. Taken together, our results suggest that the R-R-type MYB TF AtDIV2 plays negative roles in salt stress and is required for ABA signaling in Arabidopsis.
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Affiliation(s)
- Qing Fang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China.
| | - Qiong Wang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Hui Mao
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Jing Xu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Ying Wang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Hao Hu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Shuai He
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Junchu Tu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Chao Cheng
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Guozheng Tian
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Xianqiang Wang
- Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Institute of Resources Botany, School of Life Sciences, Ministry of Education Chongqing, Southwest University, Chongqing, 400715, China
| | - Xiaopeng Liu
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Chi Zhang
- Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Hubei University for Nationalities, Enshi, 445000, China
| | - Keming Luo
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China.
- Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Institute of Resources Botany, School of Life Sciences, Ministry of Education Chongqing, Southwest University, Chongqing, 400715, China.
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17
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Sakr S, Wang M, Dédaldéchamp F, Perez-Garcia MD, Ogé L, Hamama L, Atanassova R. The Sugar-Signaling Hub: Overview of Regulators and Interaction with the Hormonal and Metabolic Network. Int J Mol Sci 2018; 57:2367-2379. [PMID: 30149541 DOI: 10.1093/pcp/pcw157] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 08/07/2018] [Accepted: 09/05/2016] [Indexed: 05/25/2023] Open
Abstract
Plant growth and development has to be continuously adjusted to the available resources. Their optimization requires the integration of signals conveying the plant metabolic status, its hormonal balance, and its developmental stage. Many investigations have recently been conducted to provide insights into sugar signaling and its interplay with hormones and nitrogen in the fine-tuning of plant growth, development, and survival. The present review emphasizes the diversity of sugar signaling integrators, the main molecular and biochemical mechanisms related to the sugar-signaling dependent regulations, and to the regulatory hubs acting in the interplay of the sugar-hormone and sugar-nitrogen networks. It also contributes to compiling evidence likely to fill a few knowledge gaps, and raises new questions for the future.
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Affiliation(s)
- Soulaiman Sakr
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Ming Wang
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Fabienne Dédaldéchamp
- Equipe "Sucres & Echanges Végétaux-Environnement", Ecologie et Biologie des Interactions, Université de Poitiers, UMR CNRS 7267 EBI, Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073 Poitiers CEDEX 9, France.
| | - Maria-Dolores Perez-Garcia
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Laurent Ogé
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Latifa Hamama
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Rossitza Atanassova
- Equipe "Sucres & Echanges Végétaux-Environnement", Ecologie et Biologie des Interactions, Université de Poitiers, UMR CNRS 7267 EBI, Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073 Poitiers CEDEX 9, France.
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18
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Sakr S, Wang M, Dédaldéchamp F, Perez-Garcia MD, Ogé L, Hamama L, Atanassova R. The Sugar-Signaling Hub: Overview of Regulators and Interaction with the Hormonal and Metabolic Network. Int J Mol Sci 2018; 19:ijms19092506. [PMID: 30149541 PMCID: PMC6165531 DOI: 10.3390/ijms19092506] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/07/2018] [Accepted: 08/13/2018] [Indexed: 12/31/2022] Open
Abstract
Plant growth and development has to be continuously adjusted to the available resources. Their optimization requires the integration of signals conveying the plant metabolic status, its hormonal balance, and its developmental stage. Many investigations have recently been conducted to provide insights into sugar signaling and its interplay with hormones and nitrogen in the fine-tuning of plant growth, development, and survival. The present review emphasizes the diversity of sugar signaling integrators, the main molecular and biochemical mechanisms related to the sugar-signaling dependent regulations, and to the regulatory hubs acting in the interplay of the sugar-hormone and sugar-nitrogen networks. It also contributes to compiling evidence likely to fill a few knowledge gaps, and raises new questions for the future.
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Affiliation(s)
- Soulaiman Sakr
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Ming Wang
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Fabienne Dédaldéchamp
- Equipe "Sucres & Echanges Végétaux-Environnement", Ecologie et Biologie des Interactions, Université de Poitiers, UMR CNRS 7267 EBI, Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073 Poitiers CEDEX 9, France.
| | - Maria-Dolores Perez-Garcia
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Laurent Ogé
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Latifa Hamama
- Institut de Recherche en Horticulture et Semences, Agrocampus-Ouest, INRA, Université d'Angers, SFR 4207 QUASAV, F-49045 Angers, France.
| | - Rossitza Atanassova
- Equipe "Sucres & Echanges Végétaux-Environnement", Ecologie et Biologie des Interactions, Université de Poitiers, UMR CNRS 7267 EBI, Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073 Poitiers CEDEX 9, France.
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19
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Li L, Mu S, Cheng Z, Cheng Y, Zhang Y, Miao Y, Hou C, Li X, Gao J. Characterization and expression analysis of the WRKY gene family in moso bamboo. Sci Rep 2017; 7:6675. [PMID: 28751687 PMCID: PMC5532226 DOI: 10.1038/s41598-017-06701-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 06/16/2017] [Indexed: 12/11/2022] Open
Abstract
The WRKY family of transcription factors (TFs) is one of the ten largest families of TFs in higher plants and has been implicated in multiple biological processes. Here, we identified 121 WRKY TFs in moso bamboo, including five novel members that were not annotated in the Phyllostachys edulis genomic database. Estimation of the divergence time of paralogous gene pairs revealed an important role of the recent whole-genome duplication in the expansion of the WRKY family. Expression analysis based on quantitative reverse-transcription polymerase chain reaction (qRT-PCR) data revealed that a large number of PheWRKY genes varied significantly under cold or drought stress treatments, which could be defined as abiotic stress-responsive genes. The overexpression of PheWRKY72-2 in Arabidopsis resulted in a decreased sensitivity to drought stress during early seedling growth. PheWRKY72-2 may enhance plant tolerance to stress by functioning as a positive regulator of stoma closure. Our study provides a theoretical foundation and some experimental evidence for further functional verification of the PheWRKY family of TFs.
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Affiliation(s)
- Long Li
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing, 100102, People's Republic of China.,College of Forestry, Northwest Agriculture & Forestry University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Shaohua Mu
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing, 100102, People's Republic of China
| | - Zhanchao Cheng
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing, 100102, People's Republic of China
| | - Yuanwen Cheng
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing, 100102, People's Republic of China
| | - Ying Zhang
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing, 100102, People's Republic of China
| | - Ying Miao
- Center for Molecular Cell and Systems Biology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Chenglin Hou
- Department of Microbiology, College of Life Science, Capital Normal University, Beijing, 100048, People's Republic of China
| | - Xueping Li
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing, 100102, People's Republic of China.
| | - Jian Gao
- International Center for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan Science and Technology, State Forestry Administration, Beijing, 100102, People's Republic of China.
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20
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Vidović M, Morina F, Milić S, Albert A, Zechmann B, Tosti T, Winkler JB, Jovanović SV. Carbon allocation from source to sink leaf tissue in relation to flavonoid biosynthesis in variegated Pelargonium zonale under UV-B radiation and high PAR intensity. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2015; 93:44-55. [PMID: 25661975 DOI: 10.1016/j.plaphy.2015.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 01/26/2015] [Indexed: 05/07/2023]
Abstract
We studied the specific effects of high photosynthetically active radiation (PAR, 400-700 nm) and ecologically relevant UV-B radiation (0.90 W m(-2)) on antioxidative and phenolic metabolism by exploiting the green-white leaf variegation of Pelargonium zonale plants. This is a suitable model system for examining "source-sink" interactions within the same leaf. High PAR intensity (1350 μmol m(-2) s(-1)) and UV-B radiation induced different responses in green and white leaf sectors. High PAR intensity had a greater influence on green tissue, triggering the accumulation of phenylpropanoids and flavonoids with strong antioxidative function. Induced phenolics, together with ascorbate, ascorbate peroxidase (APX, EC 1.11.1.11) and catalase (CAT, EC 1.11.1.6) provided efficient defense against potential oxidative pressure. UV-B-induced up-regulation of non-phenolic H2O2 scavengers in green leaf sectors was greater than high PAR-induced changes, indicating a UV-B role in antioxidative defense under light excess; on the contrary, minimal effects were observed in white tissue. However, UV-B radiation had greater influence on phenolics in white leaf sections compared to green ones, inducing accumulation of phenolic glycosides whose function was UV-B screening rather than antioxidative. By stimulation of starch and sucrose breakdown and carbon allocation in the form of soluble sugars from "source" (green) tissue to "sink" (white) tissue, UV-B radiation compensated the absence of photosynthetic activity and phenylpropanoid and flavonoid biosynthesis in white sectors.
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Affiliation(s)
- Marija Vidović
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia.
| | - Filis Morina
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia.
| | - Sonja Milić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia.
| | - Andreas Albert
- Research Unit Environmental Simulation, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany.
| | - Bernd Zechmann
- Baylor University, Center for Microscopy and Imaging, One Bear Place #97046, Waco, TX 76798-7046, USA.
| | - Tomislav Tosti
- Faculty of Chemistry, University of Belgrade, PO Box 51, 11001 Belgrade, Serbia.
| | - Jana Barbro Winkler
- Research Unit Environmental Simulation, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany.
| | - Sonja Veljović Jovanović
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia.
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Mukhopadhyay P, Tyagi AK. OsTCP19 influences developmental and abiotic stress signaling by modulating ABI4-mediated pathways. Sci Rep 2015; 5:9998. [PMID: 25925167 PMCID: PMC4415230 DOI: 10.1038/srep09998] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 03/25/2015] [Indexed: 01/22/2023] Open
Abstract
Class-I TCP transcription factors are plant-specific developmental regulators. In this study, the role of one such rice gene, OsTCP19, in water-deficit and salt stress response was explored. Besides a general upregulation by abiotic stresses, this transcript was more abundant in tolerant than sensitive rice genotypes during early hours of stress. Stress, tissue and genotype-dependent retention of a small in-frame intron in this transcript was also observed. Overexpression of OsTCP19 in Arabidopsis caused upregulation of IAA3, ABI3 and ABI4 and downregulation of LOX2, and led to developmental abnormalities like fewer lateral root formation. Moreover, decrease in water loss and reactive oxygen species, and hyperaccumulation of lipid droplets in the transgenics contributed to better stress tolerance both during seedling establishment and in mature plants. OsTCP19 was also shown to directly regulate a rice triacylglycerol biosynthesis gene in transient assays. Genes similar to those up- or downregulated in the transgenics were accordingly found to coexpress positively and negatively with OsTCP19 in Rice Oligonucleotide Array Database. Interactions of OsTCP19 with OsABI4 and OsULT1 further suggest its function in modulation of abscisic acid pathways and chromatin structure. Thus, OsTCP19 appears to be an important node in cell signaling which crosslinks stress and developmental pathways.
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Affiliation(s)
- Pradipto Mukhopadhyay
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi. 110067, India
| | - Akhilesh Kumar Tyagi
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi. 110067, India
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Bahaji A, Sánchez-López ÁM, De Diego N, Muñoz FJ, Baroja-Fernández E, Li J, Ricarte-Bermejo A, Baslam M, Aranjuelo I, Almagro G, Humplík JF, Novák O, Spíchal L, Doležal K, Pozueta-Romero J. Plastidic phosphoglucose isomerase is an important determinant of starch accumulation in mesophyll cells, growth, photosynthetic capacity, and biosynthesis of plastidic cytokinins in Arabidopsis. PLoS One 2015; 10:e0119641. [PMID: 25811607 PMCID: PMC4374969 DOI: 10.1371/journal.pone.0119641] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 02/02/2015] [Indexed: 11/18/2022] Open
Abstract
Phosphoglucose isomerase (PGI) catalyzes the reversible isomerization of glucose-6-phosphate and fructose-6-phosphate. It is involved in glycolysis and in the regeneration of glucose-6-P molecules in the oxidative pentose phosphate pathway (OPPP). In chloroplasts of illuminated mesophyll cells PGI also connects the Calvin-Benson cycle with the starch biosynthetic pathway. In this work we isolated pgi1-3, a mutant totally lacking pPGI activity as a consequence of aberrant intron splicing of the pPGI encoding gene, PGI1. Starch content in pgi1-3 source leaves was ca. 10-15% of that of wild type (WT) leaves, which was similar to that of leaves of pgi1-2, a T-DNA insertion pPGI null mutant. Starch deficiency of pgi1 leaves could be reverted by the introduction of a sex1 null mutation impeding β-amylolytic starch breakdown. Although previous studies showed that starch granules of pgi1-2 leaves are restricted to both bundle sheath cells adjacent to the mesophyll and stomata guard cells, microscopy analyses carried out in this work revealed the presence of starch granules in the chloroplasts of pgi1-2 and pgi1-3 mesophyll cells. RT-PCR analyses showed high expression levels of plastidic and extra-plastidic β-amylase encoding genes in pgi1 leaves, which was accompanied by increased β-amylase activity. Both pgi1-2 and pgi1-3 mutants displayed slow growth and reduced photosynthetic capacity phenotypes even under continuous light conditions. Metabolic analyses revealed that the adenylate energy charge and the NAD(P)H/NAD(P) ratios in pgi1 leaves were lower than those of WT leaves. These analyses also revealed that the content of plastidic 2-C-methyl-D-erythritol 4-phosphate (MEP)-pathway derived cytokinins (CKs) in pgi1 leaves were exceedingly lower than in WT leaves. Noteworthy, exogenous application of CKs largely reverted the low starch content phenotype of pgi1 leaves. The overall data show that pPGI is an important determinant of photosynthesis, energy status, growth and starch accumulation in mesophyll cells likely as a consequence of its involvement in the production of OPPP/glycolysis intermediates necessary for the synthesis of plastidic MEP-pathway derived hormones such as CKs.
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Affiliation(s)
- Abdellatif Bahaji
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Ángela M. Sánchez-López
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Nuria De Diego
- Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Olomouc, CZ-78371, Czech Republic
| | - Francisco J. Muñoz
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Edurne Baroja-Fernández
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Jun Li
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Adriana Ricarte-Bermejo
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Marouane Baslam
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Iker Aranjuelo
- Plant Biology and Ecology Department, Science and Technology Faculty, University of the Basque Country, Barrio Sarriena, 48940 Leioa, Spain
| | - Goizeder Almagro
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
| | - Jan F. Humplík
- Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Olomouc, CZ-78371, Czech Republic
| | - Ondřej Novák
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University and Institute of Experimental Botany ASCR, Olomouc, CZ-78371, Czech Republic
| | - Lukáš Spíchal
- Plant Biology and Ecology Department, Science and Technology Faculty, University of the Basque Country, Barrio Sarriena, 48940 Leioa, Spain
| | - Karel Doležal
- Plant Biology and Ecology Department, Science and Technology Faculty, University of the Basque Country, Barrio Sarriena, 48940 Leioa, Spain
| | - Javier Pozueta-Romero
- Instituto de Agrobiotecnología (CSIC/UPNA/Gobierno de Navarra), Iruñako etorbidea 123, Mutiloabeti, Nafarroa, 31192, Spain
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Krasensky J, Broyart C, Rabanal FA, Jonak C. The redox-sensitive chloroplast trehalose-6-phosphate phosphatase AtTPPD regulates salt stress tolerance. Antioxid Redox Signal 2014; 21:1289-304. [PMID: 24800789 PMCID: PMC4158992 DOI: 10.1089/ars.2013.5693] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
AIMS High salinity stress impairs plant growth and development. Trehalose metabolism has been implicated in sugar signaling, and enhanced trehalose metabolism can positively regulate abiotic stress tolerance. However, the molecular mechanism(s) of the stress-related trehalose pathway and the role of individual trehalose biosynthetic enzymes for stress tolerance remain unclear. RESULTS Trehalose-6-phosphate phosphatase (TPP) catalyzes the final step of trehalose metabolism. Investigating the subcellular localization of the Arabidopsis thaliana TPP family members, we identified AtTPPD as a chloroplast-localized enzyme. Plants deficient in AtTPPD were hypersensitive, whereas plants overexpressing AtTPPD were more tolerant to high salinity stress. Elevated stress tolerance of AtTPPD overexpressors correlated with high starch levels and increased accumulation of soluble sugars, suggesting a role for AtTPPD in regulating sugar metabolism under salinity conditions. Biochemical analyses indicate that AtTPPD is a target of post-translational redox regulation and can be reversibly inactivated by oxidizing conditions. Two cysteine residues were identified as the redox-sensitive sites. Structural and mutation analyses suggest that the formation of an intramolecular disulfide bridge regulates AtTPPD activity. INNOVATION The activity of different AtTPP isoforms, located in the cytosol, nucleus, and chloroplasts, can be redox regulated, suggesting that the trehalose metabolism might relay the redox status of different cellular compartments to regulate diverse biological processes such as stress responses. CONCLUSION The evolutionary conservation of the two redox regulatory cysteine residues of TPPs in spermatophytes indicates that redox regulation of TPPs might be a common mechanism enabling plants to rapidly adjust trehalose metabolism to the prevailing environmental and developmental conditions.
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Affiliation(s)
- Julia Krasensky
- GMI-Gregor Mendel Institute of Molecular Plant Biology , Austrian Academy of Sciences, Vienna, Austria
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24
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Lunn JE, Delorge I, Figueroa CM, Van Dijck P, Stitt M. Trehalose metabolism in plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2014; 79:544-67. [PMID: 24645920 DOI: 10.1111/tpj.12509] [Citation(s) in RCA: 296] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 02/18/2014] [Accepted: 03/03/2014] [Indexed: 05/18/2023]
Abstract
Trehalose is a quantitatively important compatible solute and stress protectant in many organisms, including green algae and primitive plants. These functions have largely been replaced by sucrose in vascular plants, and trehalose metabolism has taken on new roles. Trehalose is a potential signal metabolite in plant interactions with pathogenic or symbiotic micro-organisms and herbivorous insects. It is also implicated in responses to cold and salinity, and in regulation of stomatal conductance and water-use efficiency. In plants, as in other eukaryotes and many prokaryotes, trehalose is synthesized via a phosphorylated intermediate, trehalose 6-phosphate (Tre6P). A meta-analysis revealed that the levels of Tre6P change in parallel with sucrose, which is the major product of photosynthesis and the main transport sugar in plants. We propose the existence of a bi-directional network, in which Tre6P is a signal of sucrose availability and acts to maintain sucrose concentrations within an appropriate range. Tre6P influences the relative amounts of sucrose and starch that accumulate in leaves during the day, and regulates the rate of starch degradation at night to match the demand for sucrose. Mutants in Tre6P metabolism have highly pleiotropic phenotypes, showing defects in embryogenesis, leaf growth, flowering, inflorescence branching and seed set. It has been proposed that Tre6P influences plant growth and development via inhibition of the SNF1-related protein kinase (SnRK1). However, current models conflict with some experimental data, and do not completely explain the pleiotropic phenotypes exhibited by mutants in Tre6P metabolism. Additional explanations for the diverse effects of alterations in Tre6P metabolism are discussed.
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Affiliation(s)
- John Edward Lunn
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
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25
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Delorge I, Janiak M, Carpentier S, Van Dijck P. Fine tuning of trehalose biosynthesis and hydrolysis as novel tools for the generation of abiotic stress tolerant plants. FRONTIERS IN PLANT SCIENCE 2014; 5:147. [PMID: 24782885 PMCID: PMC3995065 DOI: 10.3389/fpls.2014.00147] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 03/27/2014] [Indexed: 05/18/2023]
Abstract
The impact of abiotic stress on plant growth and development has been and still is a major research topic. An important pathway that has been linked to abiotic stress tolerance is the trehalose biosynthetic pathway. Recent findings showed that trehalose metabolism is also important for normal plant growth and development. The intermediate compound - trehalose-6-phosphate (T6P) - is now confirmed to act as a sensor for available sucrose, hereby directly influencing the type of response to the changing environmental conditions. This is possible because T6P and/or trehalose or their biosynthetic enzymes are part of complex interaction networks with other crucial hormone and sugar-induced signaling pathways, which may function at different developmental stages. Because of its effect on plant growth and development, modification of trehalose biosynthesis, either at the level of T6P synthesis, T6P hydrolysis, or trehalose hydrolysis, has been utilized to try to improve crop yield and biomass. It was shown that alteration of the amounts of either T6P and/or trehalose did result in increased stress tolerance, but also resulted in many unexpected phenotypic alterations. A main challenge is to characterize the part of the signaling pathway resulting in improved stress tolerance, without affecting the pathways resulting in the unwanted phenotypes. One such specific pathway where modification of trehalose metabolism improved stress tolerance, without any side effects, was recently obtained by overexpression of trehalase, which results in a more sensitive reaction of the stomatal guard cells and closing of the stomata under drought stress conditions. We have used the data that have been obtained from different studies to generate the optimal plant that can be constructed based on modifications of trehalose metabolism.
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Affiliation(s)
- Ines Delorge
- Department of Molecular Microbiology, VIBLeuven, Belgium
- Laboratory of Molecular Cell Biology, Institute of Botany and MicrobiologyKU Leuven, Leuven, Belgium
| | - Michal Janiak
- Department of Molecular Microbiology, VIBLeuven, Belgium
- Laboratory of Molecular Cell Biology, Institute of Botany and MicrobiologyKU Leuven, Leuven, Belgium
- Division of Crop Biotechnics, Department of BiosystemsKU Leuven, Leuven, Belgium
| | - Sebastien Carpentier
- Division of Crop Biotechnics, Department of BiosystemsKU Leuven, Leuven, Belgium
| | - Patrick Van Dijck
- Department of Molecular Microbiology, VIBLeuven, Belgium
- Laboratory of Molecular Cell Biology, Institute of Botany and MicrobiologyKU Leuven, Leuven, Belgium
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26
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Braun DM, Wang L, Ruan YL. Understanding and manipulating sucrose phloem loading, unloading, metabolism, and signalling to enhance crop yield and food security. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:1713-35. [PMID: 24347463 DOI: 10.1093/jxb/ert416] [Citation(s) in RCA: 227] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Sucrose is produced in, and translocated from, photosynthetically active leaves (sources) to support non-photosynthetic tissues (sinks), such as developing seeds, fruits, and tubers. Different plants can utilize distinct mechanisms to transport sucrose into the phloem sieve tubes in source leaves. While phloem loading mechanisms have been extensively studied in dicot plants, there is less information about phloem loading in monocots. Maize and rice are major dietary staples, which have previously been proposed to use different cellular routes to transport sucrose from photosynthetic cells into the translocation stream. The anatomical, physiological, and genetic evidence supporting these conflicting hypotheses is examined. Upon entering sink cells, sucrose often is degraded into hexoses for a wide range of metabolic and storage processes, including biosynthesis of starch, protein, and cellulose, which are all major constituents for food, fibre, and fuel. Sucrose, glucose, fructose, and their derivate, trehalose-6-phosphate, also serve as signalling molecules to regulate gene expression either directly or through cross-talk with other signalling pathways. As such, sugar transport and metabolism play pivotal roles in plant development and realization of crop yield that needs to be increased substantially to meet the projected population demand in the foreseeable future. This review will discuss the current understanding of the control of carbon partitioning from the cellular to whole-plant levels, focusing on (i) the pathways employed for phloem loading in source leaves, particularly in grasses, and the routes used in sink organs for phloem unloading; (ii) the transporter proteins responsible for sugar efflux and influx across plasma membranes; and (iii) the key enzymes regulating sucrose metabolism, signalling, and utilization. Examples of how sugar transport and metabolism can be manipulated to improve crop productivity and stress tolerance are discussed.
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Affiliation(s)
- David M Braun
- Division of Biological Sciences, Interdisciplinary Plant Group, and Missouri Maize Center, University of Missouri, Columbia, MO 65211, USA
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27
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Hyung D, Lee C, Kim JH, Yoo D, Seo YS, Jeong SC, Lee JH, Chung Y, Jung KH, Cook DR, Choi HK. Cross-family translational genomics of abiotic stress-responsive genes between Arabidopsis and Medicago truncatula. PLoS One 2014; 9:e91721. [PMID: 24675968 PMCID: PMC3968010 DOI: 10.1371/journal.pone.0091721] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 02/14/2014] [Indexed: 11/19/2022] Open
Abstract
Cross-species translation of genomic information may play a pivotal role in applying biological knowledge gained from relatively simple model system to other less studied, but related, genomes. The information of abiotic stress (ABS)-responsive genes in Arabidopsis was identified and translated into the legume model system, Medicago truncatula. Various data resources, such as TAIR/AtGI DB, expression profiles and literatures, were used to build a genome-wide list of ABS genes. tBlastX/BlastP similarity search tools and manual inspection of alignments were used to identify orthologous genes between the two genomes. A total of 1,377 genes were finally collected and classified into 18 functional criteria of gene ontology (GO). The data analysis according to the expression cues showed that there was substantial level of interaction among three major types (i.e., drought, salinity and cold stress) of abiotic stresses. In an attempt to translate the ABS genes between these two species, genomic locations for each gene were mapped using an in-house-developed comparative analysis platform. The comparative analysis revealed that fragmental colinearity, represented by only 37 synteny blocks, existed between Arabidopsis and M. truncatula. Based on the combination of E-value and alignment remarks, estimated translation rate was 60.2% for this cross-family translation. As a prelude of the functional comparative genomic approaches, in-silico gene network/interactome analyses were conducted to predict key components in the ABS responses, and one of the sub-networks was integrated with corresponding comparative map. The results demonstrated that core members of the sub-network were well aligned with previously reported ABS regulatory networks. Taken together, the results indicate that network-based integrative approaches of comparative and functional genomics are important to interpret and translate genomic information for complex traits such as abiotic stresses.
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Affiliation(s)
- Daejin Hyung
- Department of Computer Science, Dong-A University, Busan, Republic of Korea
| | - Chaeyoung Lee
- Department of Medical Bioscience, Dong-A University, Busan, Republic of Korea
| | - Jin-Hyun Kim
- Department of Medical Bioscience, Dong-A University, Busan, Republic of Korea
| | - Dongwoon Yoo
- Department of Genetic Engineering, Dong-A University, Busan, Republic of Korea
| | - Young-Su Seo
- Department of Microbiology, Busan National University, Busan, Republic of Korea
| | - Soon-Chun Jeong
- Bio-Evaluation Center, Korea Research Institute of Bioscience and Biotechnology, Cheongwon, Republic of Korea
| | - Jai-Heon Lee
- Department of Genetic Engineering, Dong-A University, Busan, Republic of Korea
| | - Youngsoo Chung
- Department of Genetic Engineering, Dong-A University, Busan, Republic of Korea
| | - Ki-Hong Jung
- Department of Plant Molecular Systems Biotechnology & Graduate School of Biotechnology, Kyunghee University, Yongin, Republic of Korea
| | - Douglas R. Cook
- Department of Plant Pathology, University of California Davis, Davis, California, United States of America
| | - Hong-kyu Choi
- Department of Genetic Engineering, Dong-A University, Busan, Republic of Korea
- * E-mail:
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Granot D, Kelly G, Stein O, David-Schwartz R. Substantial roles of hexokinase and fructokinase in the effects of sugars on plant physiology and development. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:809-19. [PMID: 24293612 DOI: 10.1093/jxb/ert400] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The basic requirements for plant growth are light, CO2, water, and minerals. However, the absorption and utilization of each of these requires investment on the part of the plant. The primary products of plants are sugars, and the hexose sugars glucose and fructose are the raw material for most of the metabolic pathways and organic matter in plants. To be metabolized, hexose sugars must first be phosphorylated. Only two families of enzymes capable of catalysing the essential irreversible phosphorylation of glucose and fructose have been identified in plants, hexokinases (HXKs) and fructokinases (FRKs). These hexose-phosphorylating enzymes appear to coordinate sugar production with the abilities to absorb light, CO2, water, and minerals. This review describes the long- and short-term effects mediated by HXK and FRK in various tissues, as well as the role of these enzymes in the coordination of sugar production with the absorption of light, CO2, water, and minerals.
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Affiliation(s)
- David Granot
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan 50250, Israel
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29
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Hathout T, El-Khallal S, Abdelgawad Z, Said E, Al Mokadem A. Enhancing Rice Salt Stress Tolerance by Priming with Validamycin A. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/ijb.2014.1.12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Martins MCM, Hejazi M, Fettke J, Steup M, Feil R, Krause U, Arrivault S, Vosloh D, Figueroa CM, Ivakov A, Yadav UP, Piques M, Metzner D, Stitt M, Lunn JE. Feedback inhibition of starch degradation in Arabidopsis leaves mediated by trehalose 6-phosphate. PLANT PHYSIOLOGY 2013; 163:1142-63. [PMID: 24043444 PMCID: PMC3813640 DOI: 10.1104/pp.113.226787] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 09/16/2013] [Indexed: 05/18/2023]
Abstract
Many plants accumulate substantial starch reserves in their leaves during the day and remobilize them at night to provide carbon and energy for maintenance and growth. In this paper, we explore the role of a sugar-signaling metabolite, trehalose-6-phosphate (Tre6P), in regulating the accumulation and turnover of transitory starch in Arabidopsis (Arabidopsis thaliana) leaves. Ethanol-induced overexpression of trehalose-phosphate synthase during the day increased Tre6P levels up to 11-fold. There was a transient increase in the rate of starch accumulation in the middle of the day, but this was not linked to reductive activation of ADP-glucose pyrophosphorylase. A 2- to 3-fold increase in Tre6P during the night led to significant inhibition of starch degradation. Maltose and maltotriose did not accumulate, suggesting that Tre6P affects an early step in the pathway of starch degradation in the chloroplasts. Starch granules isolated from induced plants had a higher orthophosphate content than granules from noninduced control plants, consistent either with disruption of the phosphorylation-dephosphorylation cycle that is essential for efficient starch breakdown or with inhibition of starch hydrolysis by β-amylase. Nonaqueous fractionation of leaves showed that Tre6P is predominantly located in the cytosol, with estimated in vivo Tre6P concentrations of 4 to 7 µm in the cytosol, 0.2 to 0.5 µm in the chloroplasts, and 0.05 µm in the vacuole. It is proposed that Tre6P is a component in a signaling pathway that mediates the feedback regulation of starch breakdown by sucrose, potentially linking starch turnover to demand for sucrose by growing sink organs at night.
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Affiliation(s)
| | - Mahdi Hejazi
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Joerg Fettke
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Martin Steup
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Regina Feil
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Ursula Krause
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Stéphanie Arrivault
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | | | - Carlos María Figueroa
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Alexander Ivakov
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | | | - Maria Piques
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Daniela Metzner
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
| | - Mark Stitt
- Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (M.C.M.M., R.F., U.K., S.A., D.V., C.M.F., A.I., U.P.Y., M.P., D.M., M.Sti., J.E.L.); and
- Institute of Biochemistry and Biology, Department of Plant Physiology, University of Potsdam, 14476 Potsdam-Golm, Germany (M.H., J.F., M.Ste.)
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Wong CE, Singh MB, Bhalla PL. The dynamics of soybean leaf and shoot apical meristem transcriptome undergoing floral initiation process. PLoS One 2013; 8:e65319. [PMID: 23762343 PMCID: PMC3675103 DOI: 10.1371/journal.pone.0065319] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 04/24/2013] [Indexed: 11/18/2022] Open
Abstract
Flowering process governs seed set and thus affects agricultural productivity. Soybean, a major legume crop, requires short-day photoperiod conditions for flowering. While leaf-derived signal(s) are essential for the photoperiod-induced floral initiation process at the shoot apical meristem, molecular events associated with early floral transition stages in either leaves or shoot apical meristems are not well understood. To provide novel insights into the molecular basis of floral initiation, RNA-Seq was used to characterize the soybean transcriptome of leaf and micro-dissected shoot apical meristem at different time points after short-day treatment. Shoot apical meristem expressed a higher number of transcripts in comparison to that of leaf highlighting greater diversity and abundance of transcripts expressed in the shoot apical meristem. A total of 2951 shoot apical meristem and 13,609 leaf sequences with significant profile changes during the time course examined were identified. Most changes in mRNA level occurred after 1short-day treatment. Transcripts involved in mediating responses to stimulus including hormones or in various metabolic processes represent the top enriched GO functional category for the SAM and leaf dataset, respectively. Transcripts associated with protein degradation were also significantly changing in leaf and SAM implicating their involvement in triggering the developmental switch. RNA-Seq analysis of shoot apical meristem and leaf from soybean undergoing floral transition reveal major reprogramming events in leaves and the SAM that point toward hormones gibberellins (GA) and cytokinin as key regulators in the production of systemic flowering signal(s) in leaves. These hormones may form part of the systemic signals in addition to the established florigen, FLOWERING LOCUS T (FT). Further, evidence is emerging that the conversion of shoot apical meristem to inflorescence meristem is linked with the interplay of auxin, cytokinin and GA creating a low cytokinin and high GA environment.
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Affiliation(s)
- Chui E. Wong
- Plant Molecular Biology and Biotechnology Group, ARC Centre of Excellence for Integrative Legume Research, Melbourne School of Land and Environment, The University of Melbourne, Parkville, Victoria, Australia
| | - Mohan B. Singh
- Plant Molecular Biology and Biotechnology Group, ARC Centre of Excellence for Integrative Legume Research, Melbourne School of Land and Environment, The University of Melbourne, Parkville, Victoria, Australia
| | - Prem L. Bhalla
- Plant Molecular Biology and Biotechnology Group, ARC Centre of Excellence for Integrative Legume Research, Melbourne School of Land and Environment, The University of Melbourne, Parkville, Victoria, Australia
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Granot D, David-Schwartz R, Kelly G. Hexose kinases and their role in sugar-sensing and plant development. FRONTIERS IN PLANT SCIENCE 2013; 4:44. [PMID: 23487525 PMCID: PMC3594732 DOI: 10.3389/fpls.2013.00044] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 02/20/2013] [Indexed: 05/18/2023]
Abstract
Hexose sugars, such as glucose and fructose produced in plants, are ubiquitous in most organisms and are the origin of most of the organic matter found in nature. To be utilized, hexose sugars must first be phosphorylated. The central role of hexose-phosphorylating enzymes has attracted the attention of many researchers, leading to novel discoveries. Only two families of enzymes capable of phosphorylating glucose and fructose have been identified in plants; hexokinases (HXKs), and fructokinases (FRKs). Intensive investigations of these two families in numerous plant species have yielded a wealth of knowledge regarding the genes number, enzymatic characterization, intracellular localization, and developmental and physiological roles of several HXKs and FRKs. The emerging picture indicates that HXK and FRK enzymes found at specific intracellular locations play distinct roles in plant metabolism and development. Individual HXKs were shown for the first time to be dual-function enzymes - sensing sugar levels independent of their catalytic activity and controlling gene expression and major developmental pathways, as well as hormonal interactions. FRK, on the other hand, seems to play a central metabolic role in vascular tissues, controlling the amounts of sugars allocated for vascular development. While a clearer picture of the roles of these two types of enzymes is emerging, many questions remain unsolved, such as the specific tissues and types of cells in which these enzymes function, the roles of individual HXK and FRK genes, and how these enzymes interact with hormones in the regulation of developmental processes. It is anticipated that ongoing efforts will broaden our knowledge of these important plant enzymes and their potential uses in the modification of plant traits.
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Affiliation(s)
- David Granot
- Institute of Plant Sciences, The Volcani Center, Agricultural Research OrganizationBet Dagan, Israel
| | - Rakefet David-Schwartz
- Institute of Plant Sciences, The Volcani Center, Agricultural Research OrganizationBet Dagan, Israel
| | - Gilor Kelly
- Institute of Plant Sciences, The Volcani Center, Agricultural Research OrganizationBet Dagan, Israel
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33
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Van Houtte H, Vandesteene L, López-Galvis L, Lemmens L, Kissel E, Carpentier S, Feil R, Avonce N, Beeckman T, Lunn JE, Van Dijck P. Overexpression of the trehalase gene AtTRE1 leads to increased drought stress tolerance in Arabidopsis and is involved in abscisic acid-induced stomatal closure. PLANT PHYSIOLOGY 2013; 161:1158-71. [PMID: 23341362 PMCID: PMC3585587 DOI: 10.1104/pp.112.211391] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Accepted: 01/19/2013] [Indexed: 05/18/2023]
Abstract
Introduction of microbial trehalose biosynthesis enzymes has been reported to enhance abiotic stress resistance in plants but also resulted in undesirable traits. Here, we present an approach for engineering drought stress tolerance by modifying the endogenous trehalase activity in Arabidopsis (Arabidopsis thaliana). AtTRE1 encodes the Arabidopsis trehalase, the only enzyme known in this species to specifically hydrolyze trehalose into glucose. AtTRE1-overexpressing and Attre1 mutant lines were constructed and tested for their performance in drought stress assays. AtTRE1-overexpressing plants had decreased trehalose levels and recovered better after drought stress, whereas Attre1 mutants had elevated trehalose contents and exhibited a drought-susceptible phenotype. Leaf detachment assays showed that Attre1 mutants lose water faster than wild-type plants, whereas AtTRE1-overexpressing plants have a better water-retaining capacity. In vitro studies revealed that abscisic acid-mediated closure of stomata is impaired in Attre1 lines, whereas the AtTRE1 overexpressors are more sensitive toward abscisic acid-dependent stomatal closure. This observation is further supported by the altered leaf temperatures seen in trehalase-modified plantlets during in vivo drought stress studies. Our results show that overexpression of plant trehalase improves drought stress tolerance in Arabidopsis and that trehalase plays a role in the regulation of stomatal closure in the plant drought stress response.
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Affiliation(s)
- Hilde Van Houtte
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Lies Vandesteene
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Lorena López-Galvis
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Liesbeth Lemmens
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Ewaut Kissel
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Sebastien Carpentier
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Regina Feil
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Nelson Avonce
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Tom Beeckman
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - John E. Lunn
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
| | - Patrick Van Dijck
- Department of Molecular Microbiology, VIB, Leuven, Belgium (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.); Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology (H.V.H., L.V., L.L.-G., L.L., N.A., P.V.D.), and Division of Crop Biotechnics, Department of Biosystems (E.K., S.C.), KU Leuven, B–3001 Leuven, Belgium; Department of Plant Systems Biology, VIB, Ghent, Belgium (L.L.-G., T.B.); Department of Plant Biotechnology and Bioinformatics, Ghent University, B–9052 Ghent, Belgium (L.L.-G., T.B.); and Max Planck Institute of Molecular Plant Physiology, Wissenschaftspark Golm, 14476 Potsdam-Golm, Germany (R.F., J.E.L.)
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Wind JJ, Peviani A, Snel B, Hanson J, Smeekens SC. ABI4: versatile activator and repressor. TRENDS IN PLANT SCIENCE 2013; 18:125-132. [PMID: 23182343 DOI: 10.1016/j.tplants.2012.10.004] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 09/26/2012] [Accepted: 10/11/2012] [Indexed: 05/20/2023]
Abstract
The ABSCISIC ACID INSENSITIVE4 (ABI4) gene was discovered to be an abscisic acid (ABA) signaling responsive transcription factor active during seed germination. The evolutionary history of the ABI4 gene supports its role as an ABA signaling intermediate in land plants. Investigating the ABI4 protein-cis element interaction supports the proposal that ABI4 binding to its known CE1 cis-element competes with transcription factor binding to the overlapping G-Box element. Recent publications report on ABI4 as a regulatory factor in diverse processes. In developing seedlings, ABI4 mediates sugar signaling, lipid breakdown, and plastid-to-nucleus signaling. Moreover, ABI4 is a regulator of rosette growth, redox signaling, cell wall metabolism and the effect of nitrate on lateral root development.
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Affiliation(s)
- Julia J Wind
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, Utrecht, The Netherlands
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35
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Daszkowska-Golec A, Wojnar W, Rosikiewicz M, Szarejko I, Maluszynski M, Szweykowska-Kulinska Z, Jarmolowski A. Arabidopsis suppressor mutant of abh1 shows a new face of the already known players: ABH1 (CBP80) and ABI4-in response to ABA and abiotic stresses during seed germination. PLANT MOLECULAR BIOLOGY 2013; 81. [PMID: 23196831 PMCID: PMC3527740 DOI: 10.1007/s11103-012-9991-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Although the importance of abscisic acid (ABA) in plant development and response to abiotic and biotic stresses is well recognized, the molecular basis of the signaling pathway has not been fully elucidated. Mutants in genes related to ABA are widely used as a tool for gaining insight into the mechanisms of ABA signal transduction and ABA-dependent stress response. We used a genetic approach of a suppressor screening in order to decipher the interaction between ABH1 (CBP80) and other components of ABA signaling. ABH1 (CBP80) encodes a large subunit of CBC (CAP BINDING COMPLEX) and the abh1 mutant is drought-tolerant and hypersensitive to ABA during seed germination. The suppressor mutants of abh1 were generated after chemical mutagenesis. The mutant named soa1 (suppressor of abh1 hypersensitivity to ABA 1) displayed an ABA-insensitive phenotype during seed germination. The genetic analysis showed that the soa1 phenotype is dominant in relation to abh1 and segregates as a single locus. Based on soa1's response to a wide spectrum of physiological assays during different stages of development, we used the candidate-genes approach in order to identify a suppressor gene. The molecular analysis revealed that mutation causing the phenotype of soa1 occurred in the ABI4 (ABA insensitive 4) gene. Analysis of pre-miR159 expression, whose processing depends on CBC, as well as targets of miR159: MYB33 and MYB101, which are positive regulators of ABA signaling, revealed a possible link between CBP80 (ABH1) and ABI4 presented here.
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Affiliation(s)
- Agata Daszkowska-Golec
- Department of Genetics, University of Silesia, Jagiellonska 28, 40-032 Katowice, Poland.
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O’Neill BP, Purnell MP, Nielsen LK, Brumbley SM. RNAi-mediated abrogation of trehalase expression does not affect trehalase activity in sugarcane. SPRINGERPLUS 2012; 1:74. [PMID: 23539210 PMCID: PMC3606522 DOI: 10.1186/2193-1801-1-74] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Accepted: 12/01/2012] [Indexed: 11/10/2022]
Abstract
Abstract
To engineer trehalose metabolism in sugarcane (Saccharum spp. hybrids) two transgenes were introduced to the genome: trehalose-6-phosphate synthase- phosphatase (TPSP), to increase trehalose biosynthesis and an RNAi transgene specific for trehalase, to abrogate trehalose catabolism. In RNAi-expressing lines trehalase expression was abrogated in many plants however no decrease in trehalase activity was observed. In TPSP lines trehalase activity was significantly higher. No events of co-integration of TPSP and RNAi transgenes were observed. We suggest trehalase activity is essential to mitigate embryonic lethal effects of trehalose metabolism and discuss the implications for engineering trehalose metabolism.
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Hu YF, Li YP, Zhang J, Liu H, Tian M, Huang Y. Binding of ABI4 to a CACCG motif mediates the ABA-induced expression of the ZmSSI gene in maize (Zea mays L.) endosperm. JOURNAL OF EXPERIMENTAL BOTANY 2012; 63:5979-89. [PMID: 23048129 DOI: 10.1093/jxb/ers246] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Starch synthase I (SSI) contributes the majority of the starch synthase activity in developing maize endosperm. In this work, the effects of various plant hormones and sugars on the expression of the starch synthase I gene (ZmSSI) in developing maize endosperms were examined. The accumulation of ZmSSI mRNA was induced using abscisic acid (ABA) but not with glucose, sucrose, or gibberellin treatment. To investigate the molecular mechanism underlying this effect, the ZmSSI promoter region (-1537 to +51) was isolated and analysed. A transient expression assay in maize endosperm tissue showed that the full-length ZmSSI promoter is activated by ABA. The results of deletion and mutation assays demonstrated that a CACCG motif in the ZmSSI promoter is responsible for the ABA inducibility. The results of binding shift assays indicated that this CACCG motif interacts with the maize ABI4 protein in vitro. The overexpression of ABI4 in endosperm tissue enhanced the activity of a promoter containing the CACCG motif in the absence of ABA treatment. Expression pattern analysis indicated that the transcription pattern of ABI4 in the developing maize endosperm was induced by ABA treatment but was only slightly affected by glucose or sucrose treatment. Taken together, these data indicate that ABI4 binds to the CACCG motif in the ZmSSI promoter and mediates its ABA inducibility.
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Affiliation(s)
- Yu-Feng Hu
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
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Louis J, Singh V, Shah J. Arabidopsis thaliana-Aphid Interaction. THE ARABIDOPSIS BOOK 2012; 10:e0159. [PMID: 22666177 PMCID: PMC3365623 DOI: 10.1199/tab.0159] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Aphids are important pests of plants that use their stylets to tap into the sieve elements to consume phloem sap. Besides the removal of photosynthates, aphid infestation also alters source-sink patterns. Most aphids also vector viral diseases. In this chapter, we will summarize on recent significant findings in plant-aphid interaction, and how studies involving Arabidopsis thaliana and Myzus persicae (Sülzer), more commonly known as the green peach aphid (GPA), are beginning to provide important insights into the molecular basis of plant defense and susceptibility to aphids. The recent demonstration that expression of dsRNA in Arabidopsis can be used to silence expression of genes in GPA has further expanded the utility of Arabidopsis for evaluating the contribution of the aphid genome-encoded proteins to this interaction.
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Affiliation(s)
- Joe Louis
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
- Current address: Department of Entomology and Center for Chemical Ecology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Vijay Singh
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
| | - Jyoti Shah
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
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Li J, Ezquer I, Bahaji A, Montero M, Ovecka M, Baroja-Fernández E, Muñoz FJ, Mérida A, Almagro G, Hidalgo M, Sesma MT, Pozueta-Romero J. Microbial volatile-induced accumulation of exceptionally high levels of starch in Arabidopsis leaves is a process involving NTRC and starch synthase classes III and IV. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2011; 24:1165-78. [PMID: 21649509 DOI: 10.1094/mpmi-05-11-0112] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Microbial volatiles promote the accumulation of exceptionally high levels of starch in leaves. Time-course analyses of starch accumulation in Arabidopsis leaves exposed to fungal volatiles (FV) emitted by Alternaria alternata revealed that a microbial volatile-induced starch accumulation process (MIVOISAP) is due to stimulation of starch biosynthesis during illumination. The increase of starch content in illuminated leaves of FV-treated hy1/cry1, hy1/cry2, and hy1/cry1/cry2 Arabidopsis mutants was many-fold lower than that of wild-type (WT) leaves, indicating that MIVOISAP is subjected to photoreceptor-mediated control. This phenomenon was inhibited by cordycepin and accompanied by drastic changes in the Arabidopsis transcriptome. MIVOISAP was also accompanied by enhancement of the total 3-phosphoglycerate/Pi ratio, and a two- to threefold increase of the levels of the reduced form of ADP-glucose pyrophosphorylase. Using different Arabidopsis knockout mutants, we investigated the impact in MIVOISAP of downregulation of genes directly or indirectly related to starch metabolism. These analyses revealed that the magnitude of the FV-induced starch accumulation was low in mutants impaired in starch synthase (SS) classes III and IV and plastidial NADP-thioredoxin reductase C (NTRC). Thus, the overall data showed that Arabidopsis MIVOISAP involves a photocontrolled, transcriptionally and post-translationally regulated network wherein photoreceptor-, SSIII-, SSIV-, and NTRC-mediated changes in redox status of plastidial enzymes play important roles.
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Affiliation(s)
- Jun Li
- Instituto de Agrobiotecnología, Nafarroa, Spain
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40
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Gravot A, Grillet L, Wagner G, Jubault M, Lariagon C, Baron C, Deleu C, Delourme R, Bouchereau A, Manzanares-Dauleux MJ. Genetic and physiological analysis of the relationship between partial resistance to clubroot and tolerance to trehalose in Arabidopsis thaliana. THE NEW PHYTOLOGIST 2011; 191:1083-1094. [PMID: 21599669 DOI: 10.1111/j.1469-8137.2011.03751.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In Arabidopsis thaliana the induction of plant trehalase during clubroot disease was proposed to act as a defense mechanism in the susceptible accession Col-0, which could thereby cope with the accumulation of pathogen-synthesized trehalose. In the present study, we assessed trehalose activity and tolerance to trehalose in the clubroot partially resistant accession Bur-0. We compared both accessions for several trehalose-related physiological traits during clubroot infection. A quantitative trait loci (QTLs) analysis of tolerance to exogenous trehalose was also conducted on a Bur-0xCol-0 RIL progeny. Trehalase activity was not induced by clubroot in Bur-0 and the inhibition of trehalase by validamycin treatments resulted in the enhancement of clubroot symptoms only in Col-0. In pathogen-free cultures, Bur-0 showed less trehalose-induced toxicity symptoms than Col-0. A QTL analysis identified one locus involved in tolerance to trehalose overlapping the confidence interval of a QTL for resistance to Plasmodiophora brassicae. This colocalization was confirmed using heterogeneous inbred family (HIF) lines. Although not based on trehalose catabolism capacity, partial resistance to clubroot is to some extent related to the tolerance to trehalose accumulation in Bur-0. These findings support an original model where contrasting primary metabolism-related regulations could contribute to the partial resistance to a plant pathogen.
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Affiliation(s)
| | | | | | | | | | | | - Carole Deleu
- Université de Rennes 1, UMR 118, F-35042 Rennes, France
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Delatte TL, Sedijani P, Kondou Y, Matsui M, de Jong GJ, Somsen GW, Wiese-Klinkenberg A, Primavesi LF, Paul MJ, Schluepmann H. Growth arrest by trehalose-6-phosphate: an astonishing case of primary metabolite control over growth by way of the SnRK1 signaling pathway. PLANT PHYSIOLOGY 2011; 157:160-74. [PMID: 21753116 PMCID: PMC3165867 DOI: 10.1104/pp.111.180422] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2011] [Accepted: 07/13/2011] [Indexed: 05/17/2023]
Abstract
The strong regulation of plant carbon allocation and growth by trehalose metabolism is important for our understanding of the mechanisms that determine growth and yield, with obvious applications in crop improvement. To gain further insight on the growth arrest by trehalose feeding, we first established that starch-deficient seedlings of the plastidic phosphoglucomutase1 mutant were similarly affected as the wild type on trehalose. Starch accumulation in the source cotyledons, therefore, did not cause starvation and consequent growth arrest in the growing zones. We then screened the FOX collection of Arabidopsis (Arabidopsis thaliana) expressing full-length cDNAs for seedling resistance to 100 mm trehalose. Three independent transgenic lines were identified with dominant segregation of the trehalose resistance trait that overexpress the bZIP11 (for basic region/leucine zipper motif) transcription factor. The resistance of these lines to trehalose could not be explained simply through enhanced trehalase activity or through inhibition of bZIP11 translation. Instead, trehalose-6-phosphate (T6P) accumulation was much increased in bZIP11-overexpressing lines, suggesting that these lines may be insensitive to the effects of T6P. T6P is known to inhibit the central stress-integrating kinase SnRK1 (KIN10) activity. We confirmed that this holds true in extracts from seedlings grown on trehalose, then showed that two independent transgenic lines overexpressing KIN10 were insensitive to trehalose. Moreover, the expression of marker genes known to be jointly controlled by SnRK1 activity and bZIP11 was consistent with low SnRK1 or bZIP11 activity in seedlings on trehalose. These results reveal an astonishing case of primary metabolite control over growth by way of the SnRK1 signaling pathway involving T6P, SnRK1, and bZIP11.
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Gamm M, Héloir MC, Bligny R, Vaillant-Gaveau N, Trouvelot S, Alcaraz G, Frettinger P, Clément C, Pugin A, Wendehenne D, Adrian M. Changes in carbohydrate metabolism in Plasmopara viticola-infected grapevine leaves. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2011; 24:1061-73. [PMID: 21649510 DOI: 10.1094/mpmi-02-11-0040] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The oomycete Plasmopara viticola is responsible for downy mildew, a severe grapevine disease. In infected grapevine leaves, we have observed an abnormal starch accumulation at the end of the dark period, suggesting modifications in starch metabolism. Therefore, several complementary approaches, including transcriptomic analyses, measurements of enzyme activities, and sugar quantification, were performed in order to investigate and to understand the effects of P. viticola infection on leaf starch and-to a larger extent-carbohydrate metabolism. Our results indicate that starch accumulation is associated with an increase in ADP-glucose pyrophosphorylase (AGPase) activity and modifications in the starch degradation pathway, especially an increased α-amylase activity. Together with these alterations in starch metabolism, we have observed an accumulation of hexoses, an increase in invertase activity, and a reduction of photosynthesis, indicating a source-to-sink transition in infected leaf tissue. Additionally, we have measured an accumulation of the disaccharide trehalose correlated to an increased trehalase gene expression and enzyme activity. Altogether, these results highlight a dramatic alteration of carbohydrate metabolism correlated with later stages of P. viticola development in leaves.
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Affiliation(s)
- Magdalena Gamm
- Universite de Bourgogne Plante Microbe Environnement, Dijon Cedex, France
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Debast S, Nunes-Nesi A, Hajirezaei MR, Hofmann J, Sonnewald U, Fernie AR, Börnke F. Altering trehalose-6-phosphate content in transgenic potato tubers affects tuber growth and alters responsiveness to hormones during sprouting. PLANT PHYSIOLOGY 2011; 156:1754-71. [PMID: 21670224 PMCID: PMC3149945 DOI: 10.1104/pp.111.179903] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 06/10/2011] [Indexed: 05/17/2023]
Abstract
Trehalose-6-phosphate (T6P) is a signaling metabolite that regulates carbon metabolism, developmental processes, and growth in plants. In Arabidopsis (Arabidopsis thaliana), T6P signaling is, at least in part, mediated through inhibition of the SNF1-related protein kinase SnRK1. To investigate the role of T6P signaling in a heterotrophic, starch-accumulating storage organ, transgenic potato (Solanum tuberosum) plants with altered T6P levels specifically in their tubers were generated. Transgenic lines with elevated T6P levels (B33-TPS, expressing Escherichia coli osmoregulatory trehalose synthesis A [OtsA], which encodes a T6P synthase) displayed reduced starch content, decreased ATP contents, and increased respiration rate diagnostic for high metabolic activity. On the other hand, lines with significantly reduced T6P (B33-TPP, expressing E. coli OtsB, which encodes a T6P phosphatase) showed accumulation of soluble carbohydrates, hexose phosphates, and ATP, no change in starch when calculated on a fresh weight basis, and a strongly reduced tuber yield. [¹⁴C]glucose feeding to transgenic tubers indicated that carbon partitioning between starch and soluble carbohydrates was not altered. Transcriptional profiling of B33-TPP tubers revealed that target genes of SnRK1 were strongly up-regulated and that T6P inhibited potato tuber SnRK1 activity in vitro. Among the SnRK1 target genes in B33-TPP tubers, those involved in the promotion of cell proliferation and growth were down-regulated, while an inhibitor of cell cycle progression was up-regulated. T6P-accumulating tubers were strongly delayed in sprouting, while those with reduced T6P sprouted earlier than the wild type. Early sprouting of B33-TPP tubers correlated with a reduced abscisic acid content. Collectively, our data indicate that T6P plays an important role for potato tuber growth.
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Affiliation(s)
| | | | | | | | | | | | - Frederik Börnke
- Friedrich-Alexander-Universität, Department of Biology, Division of Biochemistry, 91058 Erlangen, Germany (S.D., J.H., U.S., F.B.); Max-Planck-Institute for Molecular Plant Physiology, 14476 Potsdam-Golm, Germany (A.N.-N., A.R.F.); Leibniz Institut für Pflanzengenetik und Kulturpflanzenforschung, 06466 Gatersleben, Germany (M.R.H.); ECROPS Erlangen, Center of Plant Sciences, 91058 Erlangen, Germany (U.S., F.B.)
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Singh V, Louis J, Ayre BG, Reese JC, Pegadaraju V, Shah J. TREHALOSE PHOSPHATE SYNTHASE11-dependent trehalose metabolism promotes Arabidopsis thaliana defense against the phloem-feeding insect Myzus persicae. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2011; 67:94-104. [PMID: 21426427 DOI: 10.1111/j.1365-313x.2011.04583.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Agricultural productivity is limited by the removal of sap, alterations in source-sink patterns, and viral diseases vectored by aphids, which are phloem-feeding pests. Here we show that TREHALOSE PHOSPHATE SYNTHASE11 (TPS11) gene-dependent trehalose metabolism regulates Arabidopsis thaliana defense against Myzus persicae (Sülzer), commonly known as the green peach aphid (GPA). GPA infestation of Arabidopsis resulted in a transient increase in trehalose and expression of the TPS11 gene, which encodes a trehalose-6-phosphate synthase/phosphatase. Knockout of TPS11 function abolished trehalose increases in GPA-infested leaves of the tps11 mutant plant and attenuated defense against GPA. Trehalose application restored resistance in the tps11 mutant, confirming that the lack of trehalose accumulation is associated with the inability of the tps11 mutant to control GPA infestation. Resistance against GPA was also higher in the trehalose hyper-accumulating tre1 mutant and in bacterial otsB gene-expressing plants, further supporting the conclusion that trehalose plays a role in Arabidopsis defense against GPA. Evidence presented here indicates that TPS11-dependent trehalose regulates expression of the PHYTOALEXIN DEFICIENT4 gene, which is a key modulator of defenses against GPA. TPS11 also promotes the re-allocation of carbon into starch at the expense of sucrose, the primary plant-derived carbon and energy source for the insect. Our results provide a framework for the signaling function of TPS11-dependent trehalose in plant stress responses, and also reveal an important contribution of starch in controlling the severity of aphid infestation.
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Affiliation(s)
- Vijay Singh
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA
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Gómez LD, Gilday A, Feil R, Lunn JE, Graham IA. AtTPS1-mediated trehalose 6-phosphate synthesis is essential for embryogenic and vegetative growth and responsiveness to ABA in germinating seeds and stomatal guard cells. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2010; 64:1-13. [PMID: 20659274 DOI: 10.1111/j.1365-313x.2010.04312.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Trehalose and associated metabolites are part of the sugar signalling system in plants and have profound effects on development. Disruption of the TREHALOSE 6-PHOSPHATE SYNTHASE (TPS1) gene in Arabidopsis results in delayed embryo growth, altered cell wall morphology and carbon metabolism and abortion at the torpedo stage. Here we investigate the role of the TPS1 gene in post-embryonic development using two approaches. In the first we use the seed-specific ABI3 promoter to drive the TPS1 cDNA during embryo development, resulting in rescue of the embryo-lethal tps1 phenotype. Lack of expression from the ABI3::TPS1 transgene in post-germinative tps1 seedlings results in severe growth arrest, accumulation of soluble sugars and starch and leads to an increase in expression of genes related to ABA signalling. In the second approach we use TILLING (targeted induced local lesions in genomes) to generate three weaker, non-embryo-lethal, alleles (tps1-11, tps1-12 and tps1-13) and use these to demonstrate that the TPS1 protein plays a key role in modulating trehalose 6-phosphate (T6P) levels in vegetative tissues of Arabidopsis. All three weaker alleles give a consistent phenotype of slow growth and delayed flowering. Germination of tps1-11, tps1-12 and tps1-13 is hypersensitive to ABA with the degree of hypersensitivity correlating with the decrease in T6P levels in the different alleles. Stomatal pore aperture is regulated by ABA, and this was found to be affected in tps1-12. Our results show that the TPS1 gene product plays an essential role in regulating the growth of vegetative as well as embryogenic tissue in a mechanism involving ABA and sugar metabolism.
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Affiliation(s)
- Leonardo D Gómez
- CNAP, Department of Biology, University of York, Heslington, York YO105DD, UK
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Cui X, Wang T, Chen HS, Busov V, Wei H. TF-finder: a software package for identifying transcription factors involved in biological processes using microarray data and existing knowledge base. BMC Bioinformatics 2010; 11:425. [PMID: 20704747 PMCID: PMC2930629 DOI: 10.1186/1471-2105-11-425] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Accepted: 08/12/2010] [Indexed: 01/22/2023] Open
Abstract
Background Identification of transcription factors (TFs) involved in a biological process is the first step towards a better understanding of the underlying regulatory mechanisms. However, due to the involvement of a large number of genes and complicated interactions in a gene regulatory network (GRN), identification of the TFs involved in a biology process remains to be very challenging. In reality, the recognition of TFs for a given a biological process can be further complicated by the fact that most eukaryotic genomes encode thousands of TFs, which are organized in gene families of various sizes and in many cases with poor sequence conservation except for small conserved domains. This poses a significant challenge for identification of the exact TFs involved or ranking the importance of a set of TFs to a process of interest. Therefore, new methods for recognizing novel TFs are desperately needed. Although a plethora of methods have been developed to infer regulatory genes using microarray data, it is still rare to find the methods that use existing knowledge base in particular the validated genes known to be involved in a process to bait/guide discovery of novel TFs. Such methods can replace the sometimes-arbitrary process of selection of candidate genes for experimental validation and significantly advance our knowledge and understanding of the regulation of a process. Results We developed an automated software package called TF-finder for recognizing TFs involved in a biological process using microarray data and existing knowledge base. TF-finder contains two components, adaptive sparse canonical correlation analysis (ASCCA) and enrichment test, for TF recognition. ASCCA uses positive target genes to bait TFS from gene expression data while enrichment test examines the presence of positive TFs in the outcomes from ASCCA. Using microarray data from salt and water stress experiments, we showed TF-finder is very efficient in recognizing many important TFs involved in salt and drought tolerance as evidenced by the rediscovery of those TFs that have been experimentally validated. The efficiency of TF-finder in recognizing novel TFs was further confirmed by a thorough comparison with a method called Intersection of Coexpression (ICE). Conclusions TF-finder can be successfully used to infer novel TFs involved a biological process of interest using publicly available gene expression data and known positive genes from existing knowledge bases. The package for TF-finder includes an R script for ASCCA, a Perl controller, and several Perl scripts for parsing intermediate outputs. The package is available upon request (hairong@mtu.edu). The R code for standalone ASCCA is also available.
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Affiliation(s)
- Xiaoqi Cui
- School of Forest Resources and Environmental Science, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
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47
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Overexpression of OsWRKY72 gene interferes in the abscisic acid signal and auxin transport pathway of Arabidopsis. J Biosci 2010; 35:459-71. [DOI: 10.1007/s12038-010-0051-1] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Fernandez O, Béthencourt L, Quero A, Sangwan RS, Clément C. Trehalose and plant stress responses: friend or foe? TRENDS IN PLANT SCIENCE 2010; 15:409-17. [PMID: 20494608 DOI: 10.1016/j.tplants.2010.04.004] [Citation(s) in RCA: 205] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 04/06/2010] [Accepted: 04/22/2010] [Indexed: 05/18/2023]
Abstract
The disaccharide trehalose is involved in stress response in many organisms. However, in plants, its precise role remains unclear, although some data indicate that trehalose has a protective role during abiotic stresses. By contrast, some trehalose metabolism mutants exhibit growth aberrations, revealing potential negative effects on plant physiology. Contradictory effects also appear under biotic stress conditions. Specifically, trehalose is essential for the infectivity of several pathogens but at the same time elicits plant defense. Here, we argue that trehalose should not be regarded only as a protective sugar but rather like a double-faced molecule and that further investigation is required to elucidate its exact role in stress tolerance in plants.
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Affiliation(s)
- Olivier Fernandez
- Université de Reims Champagne Ardenne, Unité de Recherche Vignes et Vins de Champagne - Stress et Environnement (EA 2069), UFR Sciences Exactes et Naturelles, BP 1039, 51687 Reims Cedex 2, France
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Zhu Q, Zhang J, Gao X, Tong J, Xiao L, Li W, Zhang H. The Arabidopsis AP2/ERF transcription factor RAP2.6 participates in ABA, salt and osmotic stress responses. Gene 2010; 457:1-12. [DOI: 10.1016/j.gene.2010.02.011] [Citation(s) in RCA: 186] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 02/10/2010] [Accepted: 02/23/2010] [Indexed: 11/30/2022]
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50
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Vandesteene L, Ramon M, Le Roy K, Van Dijck P, Rolland F. A single active trehalose-6-P synthase (TPS) and a family of putative regulatory TPS-like proteins in Arabidopsis. MOLECULAR PLANT 2010; 3:406-19. [PMID: 20100798 DOI: 10.1093/mp/ssp114] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Higher plants typically do not produce trehalose in large amounts, but their genome sequences reveal large families of putative trehalose metabolism enzymes. An important regulatory role in plant growth and development is also emerging for the metabolic intermediate trehalose-6-P (T6P). Here, we present an update on Arabidopsis trehalose metabolism and a resource for further detailed analyses. In addition, we provide evidence that Arabidopsis encodes a single trehalose-6-P synthase (TPS) next to a family of catalytically inactive TPS-like proteins that might fulfill specific regulatory functions in actively growing tissues.
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Affiliation(s)
- Lies Vandesteene
- Laboratory of Functional Biology, Plant Metabolic Signaling Group, Institute of Botany and Microbiology, KU Leuven, Kasteelpark Arenberg 31-bus 2438, B-3001 Heverlee, Belgium
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