1
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Zhao DK, Mou ZM, Ruan YL. Orchids acquire fungal carbon for seed germination: pathways and players. TRENDS IN PLANT SCIENCE 2024; 29:733-741. [PMID: 38423891 DOI: 10.1016/j.tplants.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 03/02/2024]
Abstract
To germinate in nature, orchid seeds strictly rely on seed germination-promoting orchid mycorrhizal fungi (sgOMFs) for provision of carbon nutrients. The underlying delivery pathway, however, remains elusive. We develop here a plausible model for sugar transport from sgOMFs to orchid embryonic cells to fuel germination. Orchids exploit sgOMFs to induce the formation of pelotons, elaborate intracellular hyphal coils in orchid embryos. The colonized orchid cells then obtain carbon nutrients by uptake from living hyphae and peloton lysis, primarily as glucose derived from fungal trehalose hydrolyzed by orchid-specific trehalases. The uptake of massive fungally derived glucose is likely to be mediated by two classes of membrane proteins, namely, sugars will eventually be exported transporters (SWEETs) and H+-hexose symporters. The proposed model serves as a launch pad for further research to better understand and improve orchid seed germination and conservation.
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Affiliation(s)
- Da-Ke Zhao
- School of Ecology and Environmental Science, Yunnan University, Kunming 650504, China
| | - Zong-Min Mou
- School of Ecology and Environmental Science, Yunnan University, Kunming 650504, China.
| | - Yong-Ling Ruan
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Horticulture, Northwest A&F University, Xianyang 712100, China; Division of Plant Sciences, Research School of Biology, Australian National University, Canberra, ACT 2601, Australia.
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2
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Basso MF, Girardin G, Vergata C, Buti M, Martinelli F. Genome-wide transcript expression analysis reveals major chickpea and lentil genes associated with plant branching. FRONTIERS IN PLANT SCIENCE 2024; 15:1384237. [PMID: 38962245 PMCID: PMC11220206 DOI: 10.3389/fpls.2024.1384237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 05/31/2024] [Indexed: 07/05/2024]
Abstract
The search for elite cultivars with better architecture has been a demand by farmers of the chickpea and lentil crops, which aims to systematize their mechanized planting and harvesting on a large scale. Therefore, the identification of genes associated with the regulation of the branching and architecture of these plants has currently gained great importance. Herein, this work aimed to gain insight into transcriptomic changes of two contrasting chickpea and lentil cultivars in terms of branching pattern (little versus highly branched cultivars). In addition, we aimed to identify candidate genes involved in the regulation of shoot branching that could be used as future targets for molecular breeding. The axillary and apical buds of chickpea cultivars Blanco lechoso and FLIP07-318C, and lentil cultivars Castellana and Campisi, considered as little and highly branched, respectively, were harvested. A total of 1,624 and 2,512 transcripts were identified as differentially expressed among different tissues and contrasting cultivars of chickpea and lentil, respectively. Several gene categories were significantly modulated such as cell cycle, DNA transcription, energy metabolism, hormonal biosynthesis and signaling, proteolysis, and vegetative development between apical and axillary tissues and contrasting cultivars of chickpea and lentil. Based on differential expression and branching-associated biological function, ten chickpea genes and seven lentil genes were considered the main players involved in differentially regulating the plant branching between contrasting cultivars. These collective data putatively revealed the general mechanism and high-effect genes associated with the regulation of branching in chickpea and lentil, which are potential targets for manipulation through genome editing and transgenesis aiming to improve plant architecture.
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Affiliation(s)
| | | | - Chiara Vergata
- Department of Biology, University of Florence, Florence, Italy
| | - Matteo Buti
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Florence, Italy
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3
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Eh TJ, Lei P, Phyon JM, Kim HI, Xiao Y, Ma L, Li J, Bai Y, Ji X, Jin G, Meng F. The AaERF64- AaTPPA module participates in cold acclimatization of Actinidia arguta (Sieb. et Zucc.) Planch ex Miq. MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2024; 44:43. [PMID: 38836186 PMCID: PMC11144688 DOI: 10.1007/s11032-024-01475-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 05/04/2024] [Indexed: 06/06/2024]
Abstract
Actinidia arguta (A. arguta, kiwiberry) is a perennial deciduous vine with a strong overwintering ability. We hypothesized that trehalose metabolism, which plays a pivotal role in the stress tolerance of plants, may be involved in the cold acclimatization of A. arguta. Transcriptome analysis showed that the expression of AaTPPA, which encodes a trehalose-6-phosphate phosphatase (TPP), was upregulated in response to low temperatures. AaTPPA expression levels were much higher in lateral buds, roots, and stem cambia than in leaves in autumn. In AaTPPA-overexpressing (OE) Arabidopsis thaliana (A. thaliana), trehalose levels were 8-11 times higher than that of the wild type (WT) and showed different phenotypic characteristics from WT and OtsB (Escherichia coli TPP) overexpressing lines. AaTPPA-OE A. thaliana exhibited significantly higher freezing tolerance than WT and OtsB-OE lines. Transient overexpression of AaTPPA in A. arguta leaves increased the scavenging ability of reactive oxygen species (ROS) and the soluble sugar and proline contents. AaERF64, an ethylene-responsive transcription factor, was induced by ethylene treatment and bound to the GCC-box of the AaTPPA promoter to activate its expression. AaTPPA expression was also induced by abscisic acid. In summary, the temperature decrease in autumn is likely to induce AaERF64 expression through an ethylene-dependent pathway, which consequently upregulates AaTPPA expression, leading to the accumulation of osmotic protectants such as soluble sugars and proline in the overwintering tissues of A. arguta. Supplementary Information The online version contains supplementary material available at 10.1007/s11032-024-01475-8.
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Affiliation(s)
- Tong-Ju Eh
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
- School of Life Sciences, Kim Il Sung University, Pyongyang, 999093 Democratic People’s Republic of Korea
| | - Pei Lei
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
| | - Jong-Min Phyon
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
- School of Life Sciences, Kim Il Sung University, Pyongyang, 999093 Democratic People’s Republic of Korea
| | - Hyon-Il Kim
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
- School of Life Sciences, Kim Il Sung University, Pyongyang, 999093 Democratic People’s Republic of Korea
| | - Yue Xiao
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
| | - Le Ma
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
| | - Jianxin Li
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
| | - Yujing Bai
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
| | - Ximei Ji
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
| | - Guangze Jin
- Center for Ecological Research, Northeast Forestry University, Harbin, 150040 China
- Key Laboratory of Sustainable Forest Ecosystem Management Ministry of Education, Northeast Forestry University, Harbin, 150040 China
- Northeast Asia Biodiversity Research Center, Northeast Forestry University, Harbin, 150040 China
| | - Fanjuan Meng
- College of Life Sciences, Northeast Forestry University, Harbin, 150040 China
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4
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Dou N, Li L, Fang Y, Fan S, Wu C. Comparative Physiological and Transcriptome Analyses of Tolerant and Susceptible Cultivars Reveal the Molecular Mechanism of Cold Tolerance in Anthurium andraeanum. Int J Mol Sci 2023; 25:250. [PMID: 38203421 PMCID: PMC10779044 DOI: 10.3390/ijms25010250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/16/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
Anthurium andraeanum is a tropical ornamental flower. The cost of Anthurium production is higher under low temperature (non-freezing) conditions; therefore, it is important to increase its cold tolerance. However, the molecular mechanisms underlying the response of Anthurium to cold stress remain elusive. In this study, comparative physiological and transcriptome sequencing analyses of two cultivars with contrasting cold tolerances were conducted to evaluate the cold stress response at the flowering stage. The activities of superoxide dismutase and peroxidase and the contents of proline, soluble sugar, and malondialdehyde increased under cold stress in the leaves of the cold tolerant cultivar Elegang (E) and cold susceptible cultivar Menghuang (MH), while the soluble protein content decreased in MH and increased in E. Using RNA sequencing, 24,695 differentially expressed genes (DEGs) were identified from comparisons between cultivars under the same conditions or between the treatment and control groups of a single cultivar, 9132 of which were common cold-responsive DEGs. Heat-shock proteins and pectinesterases were upregulated in E and downregulated in MH, indicating that these proteins are essential for Anthurium cold tolerance. Furthermore, four modules related to cold treatment were obtained by weighted gene co-expression network analysis. The expression of the top 20 hub genes in these modules was induced by cold stress in E or MH, suggesting they might be crucial contributors to cold tolerance. DEGs were significantly enriched in plant hormone signal transduction pathways, trehalose metabolism, and ribosomal proteins, suggesting these processes play important roles in Anthurium's cold stress response. This study provides a basis for elucidating the mechanism of cold tolerance in A. andraeanum and potential targets for molecular breeding.
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Affiliation(s)
- Na Dou
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China (S.F.)
| | - Li Li
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China (S.F.)
| | - Yifu Fang
- Institute of Ornamental Plants, Shandong Provincial Academy of Forestry, Wenhua East Road 42, Jinan 250010, China;
| | - Shoujin Fan
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China (S.F.)
| | - Chunxia Wu
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Wenhua East Road 88, Jinan 250014, China (S.F.)
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5
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Mohanan A, Kodigudla A, Raman DR, Bakka K, Challabathula D. Trehalose accumulation enhances drought tolerance by modulating photosynthesis and ROS-antioxidant balance in drought sensitive and tolerant rice cultivars. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2023; 29:2035-2049. [PMID: 38222274 PMCID: PMC10784439 DOI: 10.1007/s12298-023-01404-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 11/30/2023] [Accepted: 12/11/2023] [Indexed: 01/16/2024]
Abstract
Trehalose being an integral part for plant growth, development and abiotic stress tolerance is accumulated in minute amounts in angiosperms with few exceptions from resurrection plants. In the current study, two rice cultivars differing in drought tolerance were used to analyse the role of trehalose in modulating photosynthesis and ROS-antioxidant balance leading to improvement in drought tolerance. Accumulation of trehalose in leaves of Vaisakh (drought-tolerant) and Aiswarya (drought-sensitive) rice cultivars was observed by spraying 50 mM trehalose and 100 µM validamycin A (trehalase inhibitor) followed by vacuum infiltration. Compared to stress sensitive Aiswarya cultivar, higher trehalose levels were observed in leaves of Vaisakh not only under control conditions but also under drought conditions corresponding with increased root length. The increase in leaf trehalose by treatment with trehalose or validamycin A corresponded well with a decrease in electrolyte leakage in sensitive and tolerant plants. Decreased ROS levels were reflected as increase in antioxidant enzyme activity and their gene expression in leaves of both the cultivars treated with trehalose or Validamycin A under control and drought conditions signifying the importance of trehalose in modulating the ROS-antioxidant balance for cellular protection. Further, higher chlorophyll, higher photosynthetic activity and modulation in other gas exchange parameters upon treatment with trehalose or validamycin A strongly suggested the beneficial role of trehalose for stress tolerance. Trehalose accumulation helped the tolerant cultivar adjust towards drought by maintaining higher water status and alleviating the ROS toxicity by effective activation and increment in antioxidant enzyme activity along with enhanced photosynthesis. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-023-01404-7.
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Affiliation(s)
- Akhil Mohanan
- Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610 005 India
| | - Anjali Kodigudla
- Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610 005 India
| | - Dhana Ramya Raman
- Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610 005 India
| | - Kavya Bakka
- Department of Microbiology, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610005 India
| | - Dinakar Challabathula
- Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610 005 India
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6
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Kerbler SML, Armijos-Jaramillo V, Lunn JE, Vicente R. The trehalose 6-phosphate phosphatase family in plants. PHYSIOLOGIA PLANTARUM 2023; 175:e14096. [PMID: 38148193 DOI: 10.1111/ppl.14096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/15/2023] [Accepted: 11/12/2023] [Indexed: 12/28/2023]
Abstract
Trehalose 6-phosphate (Tre6P), the intermediate of trehalose biosynthesis, is an essential signalling metabolite linking plant growth and development to carbon metabolism. While recent work has focused predominantly on the enzymes that produce Tre6P, little is known about the proteins that catalyse its degradation, the trehalose 6-phosphate phosphatases (TPPs). Often occurring in large protein families, TPPs exhibit cell-, tissue- and developmental stage-specific expression patterns, suggesting important regulatory functions in controlling local levels of Tre6P and trehalose as well as Tre6P signalling. Furthermore, growing evidence through gene expression studies and transgenic approaches shows that TPPs play an important role in integrating environmental signals with plant metabolism. This review highlights the large diversity of TPP isoforms in model and crop plants and identifies how modulating Tre6P metabolism in certain cell types, tissues, and at different developmental stages may promote stress tolerance, resilience and increased crop yield.
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Affiliation(s)
- Sandra Mae-Lin Kerbler
- Leibniz-Institute für Gemüse- und Zierpflanzenbau, Groβbeeren, Germany
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Vinicio Armijos-Jaramillo
- Grupo de Bio-Quimioinformática, Carrera de Ingeniería en Biotecnología, Facultad de Ingeniería y Ciencias Aplicadas, Universidad de Las Américas, Quito, Ecuador
| | - John Edward Lunn
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Rubén Vicente
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
- Plant Ecophysiology and Metabolism Group, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
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7
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Yao Y, Yang Y, Pan Y, Liu Z, Hou X, Li Y, Zhang H, Wang C, Liao W. Crucial roles of trehalose and 5-azacytidine in alleviating salt stress in tomato: Both synergistically and independently. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 203:108075. [PMID: 37801738 DOI: 10.1016/j.plaphy.2023.108075] [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: 02/20/2023] [Revised: 09/07/2023] [Accepted: 09/29/2023] [Indexed: 10/08/2023]
Abstract
Trehalose may improve plant stress tolerance by regulating gene expression under different abiotic stresses. DNA methylation is involved in plant growth and development, but also in response to abiotic stresses. 5-azacytidine is a widely used inhibitor of DNA methylation. In this study, tomato (Solanum lycopersicum L. 'Ailsa Craig') was used as experimental material to explore the effects of trehalose and DNA methylation on the growth and development in tomato seedlings under salt stress. 10 mM trehalose, 50 μM 5-azacytidine, and their combined treatments could significantly increase growth parameters in tomato under salt stress, indicating trehalose and 5-azacytidine might play crucial roles in alleviating salt stress both synergistically and independently. Additionally, trehalose significantly down-regulated the expression of DNA methylase genes (SlDRM5, SlDRM1L1, SlCMT3 and SlCMT2) and up-regulated the expression of DNA demethylases genes under salt stress, suggesting that trehalose might regulate DNA methylation under salt stress condition. Under salt stress, trehalose and 5-azacytidine treatments enhanced antioxidant enzyme activity and induced antioxidant enzyme gene expression in tomato seedlings. Meanwhile, trehalose and 5-azacytidine increased ABA content by regulating the expression of ABA metabolism-related genes, thereby enhancing salt tolerance in tomato. Altogether, these results suggest that trehalose conferred salt tolerance in tomato seedlings probably by DNA demethylation and enhancing antioxidant capability and ABA accumulation.
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Affiliation(s)
- Yandong Yao
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Yan Yang
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Ying Pan
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Zesheng Liu
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Xuemei Hou
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Yihua Li
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Hongsheng Zhang
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Chunlei Wang
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China
| | - Weibiao Liao
- College of Horticulture, Gansu Agricultural University, 1 Yinmen Village, Anning District, Lanzhou, 730070, China.
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8
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Shu Y, Zhang W, Tang L, Li Z, Liu X, Liu X, Liu W, Li G, Ying J, Huang J, Tong X, Hu H, Zhang J, Wang Y. ABF1 Positively Regulates Rice Chilling Tolerance via Inducing Trehalose Biosynthesis. Int J Mol Sci 2023; 24:11082. [PMID: 37446259 DOI: 10.3390/ijms241311082] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/15/2023] Open
Abstract
Chilling stress seriously limits grain yield and quality worldwide. However, the genes and the underlying mechanisms that respond to chilling stress remain elusive. This study identified ABF1, a cold-induced transcription factor of the bZIP family. Disruption of ABF1 impaired chilling tolerance with increased ion leakage and reduced proline contents, while ABF1 over-expression lines exhibited the opposite tendency, suggesting that ABF1 positively regulated chilling tolerance in rice. Moreover, SnRK2 protein kinase SAPK10 could phosphorylate ABF1, and strengthen the DNA-binding ability of ABF1 to the G-box cis-element of the promoter of TPS2, a positive regulator of trehalose biosynthesis, consequently elevating the TPS2 transcription and the endogenous trehalose contents. Meanwhile, applying exogenous trehalose enhanced the chilling tolerance of abf1 mutant lines. In summary, this study provides a novel pathway 'SAPK10-ABF1-TPS2' involved in rice chilling tolerance through regulating trehalose homeostasis.
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Affiliation(s)
- Yazhou Shu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wensheng Zhang
- School of Life Sciences, Hubei University, Wuhan 430062, China
| | - Liqun Tang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Zhiyong Li
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Xinyong Liu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Xixi Liu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Wanning Liu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Guanghao Li
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Jiezheng Ying
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Jie Huang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Xiaohong Tong
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Honghong Hu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jian Zhang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
| | - Yifeng Wang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China
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9
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Padilla YG, Gisbert-Mullor R, Bueso E, Zhang L, Forment J, Lucini L, López-Galarza S, Calatayud Á. New Insights Into Short-term Water Stress Tolerance Through Transcriptomic and Metabolomic Analyses on Pepper Roots. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 333:111731. [PMID: 37196901 DOI: 10.1016/j.plantsci.2023.111731] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 05/02/2023] [Accepted: 05/13/2023] [Indexed: 05/19/2023]
Abstract
In the current climate change scenario, water stress is a serious threat to limit crop growth and yields. It is necessary to develop tolerant plants that cope with water stress and, for this purpose, tolerance mechanisms should be studied. NIBER® is a proven water stress- and salt-tolerant pepper hybrid rootstock (Gisbert-Mullor et al., 2020; López-Serrano et al., 2020), but tolerance mechanisms remain unclear. In this experiment, NIBER® and A10 (a sensitive pepper accession (Penella et al., 2014)) response to short-term water stress at 5 h and 24 h was studied in terms of gene expression and metabolites content in roots. GO terms and gene expression analyses evidenced constitutive differences in the transcriptomic profile of NIBER® and A10, associated with detoxification systems of reactive oxygen species (ROS). Upon water stress, transcription factors like DREBs and MYC are upregulated and the levels of auxins, abscisic acid and jasmonic acid are increased in NIBER®. NIBER® tolerance mechanisms involve an increase in osmoprotectant sugars (i.e., trehalose, raffinose) and in antioxidants (spermidine), but lower contents of oxidized glutathione compared to A10, which indicates less oxidative damage. Moreover, the gene expression for aquaporins and chaperones is enhanced. These results show the main NIBER® strategies to overcome water stress.
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Affiliation(s)
- Yaiza Gara Padilla
- Centro de Citricultura y Producción Vegetal, Instituto Valenciano de Investigaciones Agrarias, CV-315, Km 10,7, Moncada, 46113 Valencia, Spain
| | - Ramón Gisbert-Mullor
- Departamento de Producción Vegetal, CVER, Universitat Politècnica de València, Camí de Vera s/n, 46022 Valencia, Spain
| | - Eduardo Bueso
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València-C.S.I.C., Valencia, Spain
| | - Leilei Zhang
- Department for Sustainable Food Process, Research Centre for Nutrigenomics and Proteomics, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - Javier Forment
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València-C.S.I.C., Valencia, Spain
| | - Luigi Lucini
- Department for Sustainable Food Process, Research Centre for Nutrigenomics and Proteomics, Università Cattolica del Sacro Cuore, 29122 Piacenza, Italy
| | - Salvador López-Galarza
- Departamento de Producción Vegetal, CVER, Universitat Politècnica de València, Camí de Vera s/n, 46022 Valencia, Spain
| | - Ángeles Calatayud
- Centro de Citricultura y Producción Vegetal, Instituto Valenciano de Investigaciones Agrarias, CV-315, Km 10,7, Moncada, 46113 Valencia, Spain.
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10
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Swida-Barteczka A, Pacak A, Kruszka K, Nuc P, Karlowski WM, Jarmolowski A, Szweykowska-Kulinska Z. MicroRNA172b-5p/trehalose-6-phosphate synthase module stimulates trehalose synthesis and microRNA172b-3p/AP2-like module accelerates flowering in barley upon drought stress. FRONTIERS IN PLANT SCIENCE 2023; 14:1124785. [PMID: 36950348 PMCID: PMC10025483 DOI: 10.3389/fpls.2023.1124785] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
MicroRNAs (miRNAs) are major regulators of gene expression during plant development under normal and stress conditions. In this study, we analyzed the expression of 150 conserved miRNAs during drought stress applied to barley ready to flower. The dynamics of miRNAs expression was also observed after rewatering. Target messenger RNA (mRNAs) were experimentally identified for all but two analyzed miRNAs, and 41 of the targets were not reported before. Drought stress applied to barley induced accelerated flowering coordinated by a pair of two differently expressed miRNAs originating from a single precursor: hvu-miR172b-3p and hvu-miR172b-5p. Increased expression of miRNA172b-3p during drought leads to the downregulation of four APETALA2(AP2)-like genes by their mRNA cleavage. In parallel, the downregulation of the miRNA172b-5p level results in an increased level of a newly identified target, trehalose-6-phosphate synthase, a key enzyme in the trehalose biosynthesis pathway. Therefore, drought-treated plants have higher trehalose content, a known osmoprotectant, whose level is rapidly dropping after watering. In addition, trehalose-6-phosphate, an intermediate of the trehalose synthesis pathway, is known to induce flowering. The hvu-miRNA172b-5p/trehalose-6-phosphate synthase and hvu-miRNA172b-3p/AP2-like create a module leading to osmoprotection and accelerated flowering induction during drought.
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Affiliation(s)
- Aleksandra Swida-Barteczka
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Andrzej Pacak
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Katarzyna Kruszka
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Przemyslaw Nuc
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Wojciech M. Karlowski
- Department of Computational Biology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Artur Jarmolowski
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Zofia Szweykowska-Kulinska
- Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
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11
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Sun G, Wase N, Shu S, Jenkins J, Zhou B, Torres-Rodríguez JV, Chen C, Sandor L, Plott C, Yoshinga Y, Daum C, Qi P, Barry K, Lipzen A, Berry L, Pedersen C, Gottilla T, Foltz A, Yu H, O'Malley R, Zhang C, Devos KM, Sigmon B, Yu B, Obata T, Schmutz J, Schnable JC. Genome of Paspalum vaginatum and the role of trehalose mediated autophagy in increasing maize biomass. Nat Commun 2022; 13:7731. [PMID: 36513676 PMCID: PMC9747981 DOI: 10.1038/s41467-022-35507-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 12/07/2022] [Indexed: 12/15/2022] Open
Abstract
A number of crop wild relatives can tolerate extreme stress to a degree outside the range observed in their domesticated relatives. However, it is unclear whether or how the molecular mechanisms employed by these species can be translated to domesticated crops. Paspalum (Paspalum vaginatum) is a self-incompatible and multiply stress-tolerant wild relative of maize and sorghum. Here, we describe the sequencing and pseudomolecule level assembly of a vegetatively propagated accession of P. vaginatum. Phylogenetic analysis based on 6,151 single-copy syntenic orthologues conserved in 6 related grass species places paspalum as an outgroup of the maize-sorghum clade. In parallel metabolic experiments, paspalum, but neither maize nor sorghum, exhibits a significant increase in trehalose when grown under nutrient-deficit conditions. Inducing trehalose accumulation in maize, imitating the metabolic phenotype of paspalum, results in autophagy dependent increases in biomass accumulation.
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Affiliation(s)
- Guangchao Sun
- Quantitative Life Sciences Initiative, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Nishikant Wase
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Biomolecular Analysis Facility. School of Medicine, University of Virginia, Charlottesville, VA, 22903, USA
| | - Shengqiang Shu
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Jerry Jenkins
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, 35806, USA
| | - Bangjun Zhou
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - J Vladimir Torres-Rodríguez
- Quantitative Life Sciences Initiative, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Cindy Chen
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Laura Sandor
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Chris Plott
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, 35806, USA
| | - Yuko Yoshinga
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Christopher Daum
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Peng Qi
- Institute of Plant Breeding, Genetics and Genomics, Department of Crop and Soil Sciences, University of Georgia, Athens, GA, 30602, USA
- Department of Crop and Soil Sciences, University of Georgia, Athens, GA, 30602, USA
- Department of Plant Biology, University of Georgia, Athens, GA, 30602, USA
| | - Kerrie Barry
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Anna Lipzen
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Luke Berry
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Connor Pedersen
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Thomas Gottilla
- Institute of Plant Breeding, Genetics and Genomics, Department of Crop and Soil Sciences, University of Georgia, Athens, GA, 30602, USA
| | - Ashley Foltz
- Quantitative Life Sciences Initiative, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Huihui Yu
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Ronan O'Malley
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA
| | - Chi Zhang
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Katrien M Devos
- Institute of Plant Breeding, Genetics and Genomics, Department of Crop and Soil Sciences, University of Georgia, Athens, GA, 30602, USA
- Department of Crop and Soil Sciences, University of Georgia, Athens, GA, 30602, USA
- Department of Plant Biology, University of Georgia, Athens, GA, 30602, USA
| | - Brandi Sigmon
- Department of Plant Pathology, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Bin Yu
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Toshihiro Obata
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Jeremy Schmutz
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Lawrence, CA, 94720, USA.
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, 35806, USA.
| | - James C Schnable
- Quantitative Life Sciences Initiative, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
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12
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Javidi MR, Maali-Amiri R, Poormazaheri H, Sadeghi Niaraki M, Kariman K. Cold stress-induced changes in metabolism of carbonyl compounds and membrane fatty acid composition in chickpea. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 192:10-19. [PMID: 36201983 DOI: 10.1016/j.plaphy.2022.09.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
In this study, changes in membrane fatty acid (FA) composition and damage indices contents as well as the transcript patterns of carbonyl-detoxifying genes were evaluated in two chickpea (Cicer arietinum L.) genotypes, cold-tolerant Sel96th11439 and cold-sensitive ILC533 under cold stress (CS; 4 °C). During CS, H2O2 and malondialdehyde (MDA) contents increased (by 47% and 57%, respectively) in the sensitive genotype, while these contents remained unchanged in the tolerant genotype. In tolerant plants, higher content of linoleic, linolenic, unsaturated FAs (UFAs), total FAs and double bond index (DBI) (by 23, 21, 19, 17 and 9%, respectively) was observed at 6 days after stress (DAS) compared to sensitive plants, which, along with alterations of the damage indices, indicate their enhanced tolerance to CS. Compared with the sensitive genotype, less lipoxygenase (LOX) activity (by 59%) in the tolerant genotype was accompanied by decreased MDA and increased levels of UFAs and DBI during CS, particularly at 6 DAS. Upregulation of aldehyde dehydrogenase and aldo-keto reductase genes (by 9- and 10-fold, respectively) at 1 DAS, along with the enhanced transcript levels of aldehyde reductase and 2-alkenal reductase (by 3- and 14.7-fold, respectively) at 6 DAS were accompanied by increased UFAs and reduced MDA contents in the tolerant genotype. Overall, the results suggest that cold tolerance in chickpea was partly associated with regulation of membrane FA compositions and the potential metabolic networks involved in synthesis and degradation of carbonyl compounds.
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Affiliation(s)
- Mohammad Reza Javidi
- Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, 31587-77871, Karaj, Iran
| | - Reza Maali-Amiri
- Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, 31587-77871, Karaj, Iran.
| | - Helen Poormazaheri
- Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, 31587-77871, Karaj, Iran
| | - Mina Sadeghi Niaraki
- Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, 31587-77871, Karaj, Iran
| | - Khalil Kariman
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6009, Australia
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13
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Kumar T, Tiwari N, Bharadwaj C, Roorkiwal M, Reddy SPP, Patil BS, Kumar S, Hamwieh A, Vinutha T, Bindra S, Singh I, Alam A, Chaturvedi SK, Kumar Y, Nimmy MS, Siddique KHM, Varshney RK. A comprehensive analysis of Trehalose-6-phosphate synthase (TPS) gene for salinity tolerance in chickpea (Cicer arietinum L.). Sci Rep 2022; 12:16315. [PMID: 36175531 PMCID: PMC9523030 DOI: 10.1038/s41598-022-20771-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/19/2022] [Indexed: 12/02/2022] Open
Abstract
Soil salinity affects various crop cultivation but legumes are the most sensitive to salinity. Osmotic stress is the first stage of salinity stress caused by excess salts in the soil on plants which adversely affects the growth instantly. The Trehalose-6-phosphate synthase (TPS) genes play a key role in the regulation of abiotic stresses resistance from the high expression of different isoform. Selected genotypes were evaluated to estimate for salt tolerance as well as genetic variability at morphological and molecular level. Allelic variations were identified in some of the selected genotypes for the TPS gene. A comprehensive analysis of the TPS gene from selected genotypes was conducted. Presence of significant genetic variability among the genotypes was found for salinity tolerance. This is the first report of allelic variation of TPS gene from chickpea and results indicates that the SNPs present in these conserved regions may contribute largely to functional distinction. The nucleotide sequence analysis suggests that the TPS gene sequences were found to be conserved among the genotypes. Some selected genotypes were evaluated to estimate for salt tolerance as well as for comparative analysis of physiological, molecular and allelic variability for salt responsive gene Trehalose-6-Phosphate Synthase through sequence similarity. Allelic variations were identified in some selected genotypes for the TPS gene. It is found that Pusa362, Pusa1103, and IG5856 are the most salt-tolerant lines and the results indicates that the identified genotypes can be used as a reliable donor for the chickpea improvement programs for salinity tolerance.
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Affiliation(s)
- Tapan Kumar
- ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, 110012, India.,International Centre for Agricultural Research in the Dry Areas, Amlaha, Madhya Pradesh, 466113, India
| | - Neha Tiwari
- International Centre for Agricultural Research in the Dry Areas, Amlaha, Madhya Pradesh, 466113, India
| | - C Bharadwaj
- ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, 110012, India.
| | - Manish Roorkiwal
- Khalifa Center for Genetic Engineering and Biotechnology, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Sneha Priya Pappula Reddy
- ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, 110012, India.,The UWA Institute of Agriculture, UWA, Perth, WA, Australia
| | - B S Patil
- ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, 110012, India
| | - Sudhir Kumar
- ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, 110012, India
| | - Aladdin Hamwieh
- International Centre for Agricultural Research in the Dry Areas, 2 Port Said, Victoria Square, Maadi, Cairo, Egypt
| | - T Vinutha
- ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, 110012, India
| | | | | | - Afroz Alam
- Banathali Vidyapith, Banasthali, Rajasthan, India
| | | | | | | | - K H M Siddique
- The UWA Institute of Agriculture, UWA, Perth, WA, Australia
| | - Rajeev K Varshney
- International Chair in Agriculture & Food Security, State Agricultural Biotechnology Center, Centre for Crop & Food Innovation, Food Futures Institute, Murdoch University, Perth, Australia
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14
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Stephen K, Beena R, Kiran AG, Shanija S, Saravanan R. Changes in physiological traits and expression of key genes involved in sugar signaling pathway in rice under high temperature stress. 3 Biotech 2022; 12:183. [PMID: 35875179 PMCID: PMC9300813 DOI: 10.1007/s13205-022-03242-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 06/21/2022] [Indexed: 11/29/2022] Open
Abstract
Efficient assimilate partitioning between the source and sink organs to achieve increased grain weight is coordinated by the sugar signaling mechanism. The expression of the genes involved in sugar signaling mainly hexokinases 2 (OsHXK2), Sucrose-nonfermentation1-related protein kinase1 (OsSnRK1), trehalose-6-phosphate synthase 1 (OsTPS1) and target of rapamycin (OsTOR) under high temperature stress was examined in tolerant (NL-44) and susceptible (Vandana) varieties of rice. The photosynthetic rate, stomatal conductance, water-use efficiency, photochemical efficiency (Fv/Fm), quantum yield (ϕPSII), pollen viability, spikelet fertility and 1000 grain weight were significantly higher in NL-44 compared to Vandana under stress. The difference in the gene expression levels in the vegetative and grain-filling phases as well as between the tolerant and susceptible varieties, revealed unique pathways of sugar signaling under heat stress. In the vegetative phase, the expression of OsTOR seems to be the difference between NL-44 and Vandana for their differed heat stress tolerance whereas, in the grain-filling phase, the difference between the varieties lay in the regulation of OsHXK2. The comparative changes in the expression levels between the genes under the varying conditions indicate the sugar status in the source and sink organs that are available for translocation or remobilization.
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Affiliation(s)
- K. Stephen
- Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - R. Beena
- Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - A. G. Kiran
- Department of Plant Biotechnology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - S. Shanija
- Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala 695522 India
| | - R. Saravanan
- ICAR-CTCRI, Thiruvananthapuram, Kerala 695017 India
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15
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Genome-Wide Identification of Cotton (Gossypium spp.) Trehalose-6-Phosphate Phosphatase (TPP) Gene Family Members and the Role of GhTPP22 in the Response to Drought Stress. PLANTS 2022; 11:plants11081079. [PMID: 35448808 PMCID: PMC9024796 DOI: 10.3390/plants11081079] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/11/2022] [Accepted: 04/12/2022] [Indexed: 01/10/2023]
Abstract
Trehalose-6-phosphate phosphatase (TPP) is a key enzyme involved in trehalose synthesis in higher plants. Previous studies have shown that TPP family genes increase yields without affecting plant growth under drought conditions, but their functions in cotton have not been reported. In this study, 17, 12, 26 and 24 TPP family genes were identified in Gossypium arboreum, Gossypium raimondii, Gossypium barbadense and Gossypium hirsutum, respectively. The 79 TPP family genes were divided into three subgroups by phylogenetic analysis. Virus-induced gene silencing (VIGS) of GhTPP22 produced TRV::GhTPP22 plants that were more sensitive to drought stress than the control plants, and the relative expression of GhTPP22 was decreased, as shown by qRT–PCR. Moreover, we analysed the gene structure, targeted small RNAs, and gene expression patterns of TPP family members and the physicochemical properties of their encoded proteins. Overall, members of the TPP gene family in cotton were systematically identified, and the function of GhTPP22 under drought stress conditions was preliminarily verified. These findings provide new information for improving drought resistance for cotton breeding in the future.
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16
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Le Cong Huyen Bao Phan T, Crepin N, Rolland F, Van Dijck P. Two trehalase isoforms, produced from a single transcript, regulate drought stress tolerance in Arabidopsis thaliana. PLANT MOLECULAR BIOLOGY 2022; 108:531-547. [PMID: 35088230 DOI: 10.1007/s11103-022-01243-2] [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: 07/13/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Alternative translation initiation of the unique Arabidopsis trehalase gene allows for the production of two isoforms with different subcellular localization, providing enzyme access to both intra- and extra-cellular trehalose. The trehalose-hydrolyzing enzyme trehalase mediates drought stress tolerance in Arabidopsis thaliana by controlling ABA-induced stomatal closure. We now report the existence of two trehalase isoforms, produced from a single transcript by alternative translation initiation. The longer full-length N-glycosylated isoform (AtTRE1L) localizes in the plasma membrane with the catalytic domain in the apoplast. The shorter isoform (AtTRE1S) lacks the transmembrane domain and localizes in the cytoplasm and nucleus. The two isoforms can physically interact and this interaction affects localization of AtTRE1S. Consistent with their role in plant drought stress tolerance, both isoforms are activated by AtCPK10, a stress-induced calcium-dependent guard cell protein kinase. Transgenic plants expressing either isoform indicate that both can mediate ABA-induced stomatal closure in response to drought stress but that the short (cytoplasmic/nuclear) isoform, enriched in those conditions, is significantly more effective.
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Affiliation(s)
- Tran Le Cong Huyen Bao Phan
- VIB-KU Leuven Center for Microbiology, VIB, Leuven, Belgium
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Leuven, Belgium
- Department of Biology, College of Natural Sciences, Cantho University, Cantho, Vietnam
- KU Leuven Plant Institute (LPI), Leuven, Belgium
| | - Nathalie Crepin
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium
- KU Leuven Plant Institute (LPI), Leuven, Belgium
| | - Filip Rolland
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium
- KU Leuven Plant Institute (LPI), Leuven, Belgium
| | - Patrick Van Dijck
- VIB-KU Leuven Center for Microbiology, VIB, Leuven, Belgium.
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Leuven, Belgium.
- KU Leuven Plant Institute (LPI), Leuven, Belgium.
- Laboratory of Molecular Cell Biology, Department of Biology, KU Leuven, Kasteelpark Arenberg 38, 3001, Leuven, Belgium.
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17
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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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18
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Zhu F, Alseekh S, Koper K, Tong H, Nikoloski Z, Naake T, Liu H, Yan J, Brotman Y, Wen W, Maeda H, Cheng Y, Fernie AR. Genome-wide association of the metabolic shifts underpinning dark-induced senescence in Arabidopsis. THE PLANT CELL 2022; 34:557-578. [PMID: 34623442 PMCID: PMC8774053 DOI: 10.1093/plcell/koab251] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 10/05/2021] [Indexed: 05/31/2023]
Abstract
Dark-induced senescence provokes profound metabolic shifts to recycle nutrients and to guarantee plant survival. To date, research on these processes has largely focused on characterizing mutants deficient in individual pathways. Here, we adopted a time-resolved genome-wide association-based approach to characterize dark-induced senescence by evaluating the photochemical efficiency and content of primary and lipid metabolites at the beginning, or after 3 or 6 days in darkness. We discovered six patterns of metabolic shifts and identified 215 associations with 81 candidate genes being involved in this process. Among these associations, we validated the roles of four genes associated with glycine, galactinol, threonine, and ornithine levels. We also demonstrated the function of threonine and galactinol catabolism during dark-induced senescence. Intriguingly, we determined that the association between tyrosine contents and TYROSINE AMINOTRANSFERASE 1 influences enzyme activity of the encoded protein and transcriptional activity of the gene under normal and dark conditions, respectively. Moreover, the single-nucleotide polymorphisms affecting the expression of THREONINE ALDOLASE 1 and the amino acid transporter gene AVT1B, respectively, only underlie the variation in threonine and glycine levels in the dark. Taken together, these results allow us to present a very detailed model of the metabolic aspects of dark-induced senescence, as well as the process itself.
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Affiliation(s)
- Feng Zhu
- National R&D Center for Citrus Preservation, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
| | - Saleh Alseekh
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv 4000, Bulgaria
| | - Kaan Koper
- Department of Botany, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Hao Tong
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv 4000, Bulgaria
- Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam 14476, Germany
| | - Zoran Nikoloski
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv 4000, Bulgaria
- Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam 14476, Germany
| | - Thomas Naake
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
| | - Haijun Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
- Gregor Mendel Institute, Austrian Academy of Sciences, Vienna 1030, Austria
| | - Jianbing Yan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Yariv Brotman
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm 14476, Germany
- Department of Life Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Weiwei Wen
- National R&D Center for Citrus Preservation, Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Hiroshi Maeda
- Department of Botany, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
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Abhilasha A, Roy Choudhury S. Molecular and Physiological Perspectives of Abscisic Acid Mediated Drought Adjustment Strategies. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10122769. [PMID: 34961239 PMCID: PMC8708728 DOI: 10.3390/plants10122769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/06/2021] [Accepted: 12/11/2021] [Indexed: 05/15/2023]
Abstract
Drought is the most prevalent unfavorable condition that impairs plant growth and development by altering morphological, physiological, and biochemical functions, thereby impeding plant biomass production. To survive the adverse effects, water limiting condition triggers a sophisticated adjustment mechanism orchestrated mainly by hormones that directly protect plants via the stimulation of several signaling cascades. Predominantly, water deficit signals cause the increase in the level of endogenous ABA, which elicits signaling pathways involving transcription factors that enhance resistance mechanisms to combat drought-stimulated damage in plants. These responses mainly include stomatal closure, seed dormancy, cuticular wax deposition, leaf senescence, and alteration of the shoot and root growth. Unraveling how plants adjust to drought could provide valuable information, and a comprehensive understanding of the resistance mechanisms will help researchers design ways to improve crop performance under water limiting conditions. This review deals with the past and recent updates of ABA-mediated molecular mechanisms that plants can implement to cope with the challenges of drought stress.
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Morabito C, Secchi F, Schubert A. Grapevine TPS (trehalose-6-phosphate synthase) family genes are differentially regulated during development, upon sugar treatment and drought stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 164:54-62. [PMID: 33964690 DOI: 10.1016/j.plaphy.2021.04.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Trehalose-6-phosphate synthase (TPS) performs the first step in the biosynthetic pathway of trehalose-6-phosphate and trehalose. These two molecules play key roles in the control of carbon allocation and of stress responses in plants. We investigated the organization of the TPS gene family and its developmental and environmental expression regulation in grapevine, a major horticultural crop. We identified three novel genes in the family, and assessed the expression of the 11 family members in tissues and developmental phases. Two potentially biosynthetic TPS isoforms belonging to Class I were preferentially expressed in leaf (VvTPS1_A) and in fruit (VvTPS1_B) respectively. Sucrose treatment induced expression of VvTPS1_B, but not of VvTPS1_A, and a progressive decrease of sucrose concentration. Expression of a few Class II genes was affected by sucrose treatment. Application of osmotic stress by withdrawing irrigation also induced a decrease in sucrose and an increase of glucose content, and down-regulation of the VvTPS1_A gene. We discuss the possible role of these potential biosynthetic TPS genes. Subgroups of TPS genes, including both Class I and ClassII isoforms, followed a co-expression pattern in different conditions, suggesting that Class II TPS proteins may directly or indirectly interact with TPS biosynthetic genes. Our results pave the way for clarification of the role of TPS isoforms in grapevine responses to environmental stress.
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Affiliation(s)
- Cristina Morabito
- Department of Agriculture, Forest and Food Sciences, University of Turin, Largo Paolo Braccini 2, 10095, Grugliasco, Italy.
| | - Francesca Secchi
- Department of Agriculture, Forest and Food Sciences, University of Turin, Largo Paolo Braccini 2, 10095, Grugliasco, Italy
| | - Andrea Schubert
- Department of Agriculture, Forest and Food Sciences, University of Turin, Largo Paolo Braccini 2, 10095, Grugliasco, Italy
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21
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Liu W, Li S, Zhang C, Jin F, Li W, Li X. Identification of Candidate Genes for Drought Tolerance at Maize Seedlings Using Genome-Wide Association. IRANIAN JOURNAL OF BIOTECHNOLOGY 2021; 19:e2637. [PMID: 34825009 PMCID: PMC8590722 DOI: 10.30498/ijb.2021.209324.2637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Drought stress is a serious threat that limit maize growth and production. OBJECTIVES The assessment tolerance level of maize by measuring changes in the main biochemical and physiological indicators under drought stress. MATERIAL AND METHODS We performed a genome-wide association analysis of biochemical and physiological indicators using an elite association panel. RESULTS The results revealed that eight significant SNPs (p<0.05/N) located in eight genes that are distributed on different chromosomes were associated with drought resistance indices under drought stress. Among these genes, four genes were linked via the associated SNPs with drought-resistance indices of the malondialdehyde activity (MDA), three genes were linked with drought resistance indexes of the superoxide dismutase activity (SOD), and one gene was linked with drought resistance indexes of relative conductivity (REC). The candidate genes functioned as transcription factors, enzymes, and transporters, which included trehalase, the AP2/EREB160 transcription factor, and glutathione S-transferase and also encoded a gene of unknown function. These genes may be directly or indirectly involved in drought resistance. The expression levels of ZmEREB160 responded to ABA and drought stress. CONCLUSIONS These results provided good information to understand the genetic basis of variation in drought resistance indices of biochemical and physiological indicators during drought stress.
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Affiliation(s)
- Wenping Liu
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, China
| | - Shufang Li
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, China
| | - Chunxiao Zhang
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, China
| | - Fengxue Jin
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, China
| | - Wanjun Li
- Taonan Research Center, Jilin Academy of Agricultural Sciences, Taonan 137100, Jilin, China
| | - Xiaohui Li
- Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, China
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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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Chen Y, Dubois M, Vermeersch M, Inzé D, Vanhaeren H. Distinct cellular strategies determine sensitivity to mild drought of Arabidopsis natural accessions. PLANT PHYSIOLOGY 2021; 186:1171-1185. [PMID: 33693949 PMCID: PMC8195540 DOI: 10.1093/plphys/kiab115] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 02/14/2021] [Indexed: 05/18/2023]
Abstract
The worldwide distribution of Arabidopsis (Arabidopsis thaliana) accessions imposes different types of evolutionary pressures, which contributes to various responses of these accessions to environmental stresses. Responses to drought stress have mostly been studied in the Columbia accession, which is predominantly used in plant research. However, the reactions to drought stress are complex and our understanding of the responses that contribute to maintaining plant growth during mild drought (MD) is very limited. Here, we studied the mechanisms with which natural accessions react to MD at a physiological and molecular level during early leaf development. We documented variations in MD responses among natural accessions and used transcriptome sequencing of a drought-sensitive accession, ICE163, and a drought-insensitive accession, Yeg-1, to gain insights into the mechanisms underlying this discrepancy. This revealed that ICE163 preferentially induces jasmonate- and anthocyanin-related pathways, which are beneficial in biotic stress defense, whereas Yeg-1 has a more pronounced activation of abscisic acid signaling, the classical abiotic stress response. Related physiological traits, including the content of proline, anthocyanins, and reactive oxygen species, stomatal closure, and cellular leaf parameters, were investigated and linked to the transcriptional responses. We can conclude that most of these processes constitute general drought response mechanisms that are regulated similarly in drought-insensitive and -sensitive accessions. However, the capacity to close stomata and maintain cell expansion under MD appeared to be major factors that allow to better sustain leaf growth under MD.
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Affiliation(s)
- Ying Chen
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium
| | - Marieke Dubois
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium
| | - Mattias Vermeersch
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium
| | - Dirk Inzé
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium
- Address for communication:
| | - Hannes Vanhaeren
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, B-9052 Ghent, Belgium
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24
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25
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Nuñez-Muñoz L, Vargas-Hernández B, Hinojosa-Moya J, Ruiz-Medrano R, Xoconostle-Cázares B. Plant drought tolerance provided through genome editing of the trehalase gene. PLANT SIGNALING & BEHAVIOR 2021; 16:1877005. [PMID: 33570447 PMCID: PMC7971296 DOI: 10.1080/15592324.2021.1877005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 05/25/2023]
Abstract
Drought is one of the main abiotic factors that affect agricultural productivity, jeopardizing food security. Modern biotechnology is a useful tool for the generation of stress-tolerant crops, but its release and field-testing involves complex regulatory frameworks. However, gene editing technology mediated by the CRISPR/Cas9 system is a suitable strategy for plant breeding, which can lead to precise and specific modifications in the plant genome. The aim of the present work is to produce drought-tolerant plant varieties by modifying the trehalase gene. Furthermore, a new vector platform was developed to edit monocot and dicot genomes, by modifying vectors adding a streptomycin resistance marker for use with the hypervirulent Agrobacterium tumefaciens AGL1 strain. The gRNA design was based on the trehalase sequence in several species of the genus Selaginella that show drought tolerance. Arabidopsis thaliana carrying editions in the trehalase substrate-binding domain showed a higher tolerance to drought stress. In addition, a transient transformation system for gene editing in maize leaves was characterized.
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Affiliation(s)
- Leandro Nuñez-Muñoz
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
| | - Brenda Vargas-Hernández
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
| | - Jesús Hinojosa-Moya
- Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Puebla, México
| | - Roberto Ruiz-Medrano
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
| | - Beatriz Xoconostle-Cázares
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
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Yoshida T, Yamaguchi-Shinozaki K. Metabolic engineering: Towards water deficiency adapted crop plants. JOURNAL OF PLANT PHYSIOLOGY 2021; 258-259:153375. [PMID: 33609854 DOI: 10.1016/j.jplph.2021.153375] [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: 12/01/2020] [Revised: 01/11/2021] [Accepted: 01/13/2021] [Indexed: 06/12/2023]
Abstract
Water deficiency caused by drought is one of the severe environmental conditions limiting plant growth, development, and yield. In this review article, we will summarize the changes in transcription, metabolism, and phytohormones under drought stress conditions and show the key transcription factors in these processes. We will also highlight the recent attempts to enhance stress tolerance without growth retardation and discuss the perspective on the development of stress adapted crops by engineering transcription factors.
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Affiliation(s)
- Takuya Yoshida
- Max-Planck-Institut Für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany; Centre of Plant Systems Biology and Biotechnology, 4000, Plovdiv, Bulgaria.
| | - Kazuko Yamaguchi-Shinozaki
- Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 113-8657, Tokyo, Japan; Research Institute for Agricultural and Life Sciences, Tokyo University of Agriculture, 156-8502, Tokyo, Japan
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27
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Jaiswal SK, Mahajan S, Chakraborty A, Kumar S, Sharma VK. The genome sequence of Aloe vera reveals adaptive evolution of drought tolerance mechanisms. iScience 2021; 24:102079. [PMID: 33644713 PMCID: PMC7889978 DOI: 10.1016/j.isci.2021.102079] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/18/2020] [Accepted: 01/14/2021] [Indexed: 12/12/2022] Open
Abstract
Aloe vera is a species from Asphodelaceae family having characteristics like drought resistance and numerous medicinal properties. However, the genetic basis of these phenotypes is yet unknown primarily due to unavailability of its genome sequence. Thus, we report the first Aloe vera genome sequence comprising of 12.93 Gbp and harboring 86,177 protein-coding genes. It is the first genome from Asphodelaceae family and the largest angiosperm genome sequenced and assembled till date. We also report the first genome-wide phylogeny of monocots including Aloe vera to resolve its phylogenetic position. The comprehensive comparative analysis of Aloe vera with other available high-quality monocot genomes revealed adaptive evolution in several genes of drought stress response, CAM pathway, and circadian rhythm and positive selection in DNA damage response genes in Aloe vera. This study provides clues on the genetic basis of evolution of drought stress tolerance capabilities of Aloe vera.
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Affiliation(s)
- Shubham K. Jaiswal
- MetaBioSys Group, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Shruti Mahajan
- MetaBioSys Group, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Abhisek Chakraborty
- MetaBioSys Group, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Sudhir Kumar
- MetaBioSys Group, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Vineet K. Sharma
- MetaBioSys Group, Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
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Omari Alzahrani F. Metabolic engineering of osmoprotectants to elucidate the mechanism(s) of salt stress tolerance in crop plants. PLANTA 2021; 253:24. [PMID: 33403449 DOI: 10.1007/s00425-020-03550-8] [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: 08/07/2020] [Accepted: 12/22/2020] [Indexed: 05/08/2023]
Abstract
Previous studies on engineering osmoprotectant metabolic pathway genes focused on the performance of transgenic plants under salt stress conditions rather than elucidating the underlying mechanism(s), and hence, the mechanism(s) remain(s) unclear. Salt stress negatively impacts agricultural crop yields. Hence, to meet future food demands, it is essential to generate salt stress-resistant varieties. Although traditional breeding has improved salt tolerance in several crops, this approach remains inadequate due to the low genetic diversity of certain important crop cultivars. Genetic engineering is used to introduce preferred gene(s) from any genetic reserve or to modify the expression of the existing gene(s) responsible for salt stress response or tolerance, thereby leading to improved salt tolerance in plants. Although plants naturally produce osmoprotectants as an adaptive mechanism for salt stress tolerance, they offer only partial protection. Recently, progress has been made in the identification and characterization of genes involved in the biosynthetic pathways of osmoprotectants. Exogenous application of these osmoprotectants, and genetic engineering of enzymes in their biosynthetic pathways, have been reported to enhance salt tolerance in different plants. However, no clear mechanistic model exists to explain how osmoprotectant accumulation in transgenic plants confers salt tolerance. This review critically examines the results obtained thus far for elucidating the underlying mechanisms of osmoprotectants for improved salt tolerance, and thus, crop yield stability under salt stress conditions, through the genetic engineering of trehalose, glycinebetaine, and proline metabolic pathway genes.
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Affiliation(s)
- Fatima Omari Alzahrani
- Department of Biology, Faculty of Science, Albaha Province, Albaha University, Albaha, 65527, Saudi Arabia.
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29
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Diniz AL, da Silva DIR, Lembke CG, Costa MDBL, ten-Caten F, Li F, Vilela RD, Menossi M, Ware D, Endres L, Souza GM. Amino Acid and Carbohydrate Metabolism Are Coordinated to Maintain Energetic Balance during Drought in Sugarcane. Int J Mol Sci 2020; 21:ijms21239124. [PMID: 33266228 PMCID: PMC7729667 DOI: 10.3390/ijms21239124] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 01/10/2023] Open
Abstract
The ability to expand crop plantations without irrigation is a major goal to increase agriculture sustainability. To achieve this end, we need to understand the mechanisms that govern plant growth responses under drought conditions. In this study, we combined physiological, transcriptomic, and genomic data to provide a comprehensive picture of drought and recovery responses in the leaves and roots of sugarcane. Transcriptomic profiling using oligoarrays and RNA-seq identified 2898 (out of 21,902) and 46,062 (out of 373,869) transcripts as differentially expressed, respectively. Co-expression analysis revealed modules enriched in photosynthesis, small molecule metabolism, alpha-amino acid metabolism, trehalose biosynthesis, serine family amino acid metabolism, and carbohydrate transport. Together, our findings reveal that carbohydrate metabolism is coordinated with the degradation of amino acids to provide carbon skeletons to the tricarboxylic acid cycle. This coordination may help to maintain energetic balance during drought stress adaptation, facilitating recovery after the stress is alleviated. Our results shed light on candidate regulatory elements and pave the way to biotechnology strategies towards the development of drought-tolerant sugarcane plants.
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Affiliation(s)
- Augusto Lima Diniz
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil; (A.L.D.); (D.I.R.d.S.); (C.G.L.); (M.D.-B.L.C.); (F.t.-C.)
| | - Danielle Izilda Rodrigues da Silva
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil; (A.L.D.); (D.I.R.d.S.); (C.G.L.); (M.D.-B.L.C.); (F.t.-C.)
- Center for Applied Plant Sciences (CAPS), The Ohio State University, Columbus, OH 43210, USA
- Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, SP 13418-900, Brazil
| | - Carolina Gimiliani Lembke
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil; (A.L.D.); (D.I.R.d.S.); (C.G.L.); (M.D.-B.L.C.); (F.t.-C.)
| | - Maximiller Dal-Bianco Lamas Costa
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil; (A.L.D.); (D.I.R.d.S.); (C.G.L.); (M.D.-B.L.C.); (F.t.-C.)
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Felipe ten-Caten
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil; (A.L.D.); (D.I.R.d.S.); (C.G.L.); (M.D.-B.L.C.); (F.t.-C.)
| | - Forrest Li
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA; (F.L.); (D.W.)
| | - Romel Duarte Vilela
- Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL 57100-000, Brazil; (R.D.V.); (L.E.)
| | - Marcelo Menossi
- Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP 13083-862, Brazil;
| | - Doreen Ware
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA; (F.L.); (D.W.)
- USDA ARS NAA Robert W. Holley Center for Agriculture and Health, Ithaca, NY 14853, USA
| | - Lauricio Endres
- Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL 57100-000, Brazil; (R.D.V.); (L.E.)
| | - Glaucia Mendes Souza
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP 05508-000, Brazil; (A.L.D.); (D.I.R.d.S.); (C.G.L.); (M.D.-B.L.C.); (F.t.-C.)
- Correspondence:
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Lin Q, Wang S, Dao Y, Wang J, Wang K. Arabidopsis thaliana trehalose-6-phosphate phosphatase gene TPPI enhances drought tolerance by regulating stomatal apertures. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:4285-4297. [PMID: 32242234 DOI: 10.1093/jxb/eraa173] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 04/01/2020] [Indexed: 05/03/2023]
Abstract
Transpiration occurs through stomata. The alteration of stomatal apertures in response to drought stress is an important process associated with water use efficiency (WUE). Trehalose-6-phosphate phosphatase (TPP) family genes have been reported to participate in adjustment of stomatal aperture. However, there have been no reports of the trehalose metabolism pathway genes improving WUE, and the upstream signalling pathway modulating these genes is not clear. Here, we demonstrate that a member of the TPP gene family, AtTPPI, confers drought resistance and improves WUE by decreasing stomatal apertures and improving root architecture. The reduced expression of AtTPPI caused a drought-sensitive phenotype, while its overexpression significantly increased drought tolerance. Abscisic acid (ABA)-induced stomatal closure experiments confirmed that AtTPPI mutation increased the stomatal aperture compared with that of wild-type plants; in contrast, overexpression plants had smaller stomatal apertures than those of wild-type plants. Moreover, AtTPPI mutation also caused stunted primary root length and compromised auxin transport, while overexpression plants had longer primary root lengths. Yeast one-hybrid assays showed that ABA-responsive element-binding factor1 (ABF1), ABF2, and ABF4 directly regulated AtTPPI expression. In summary, the way in which AtTPPI responds to drought stress suggests that AtTPPI-mediated stomatal regulation is an important mechanism to cope with drought stress and improve WUE.
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Affiliation(s)
- Qingfang Lin
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Song Wang
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Yihang Dao
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Jianyong Wang
- College of Forestry, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Kai Wang
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- National Engineering Research Center of Sugarcane, Fujian Agriculture and Forestry University, Fuzhou, China
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31
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Zhou Y, Li X, Katsuma S, Xu Y, Shi L, Shimada T, Wang H. Duplication and diversification of trehalase confers evolutionary advantages on lepidopteran insects. Mol Ecol 2019; 28:5282-5298. [PMID: 31674075 DOI: 10.1111/mec.15291] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 10/23/2019] [Indexed: 01/06/2023]
Abstract
Gene duplication provides a major source of new genes for evolutionary novelty and ecological adaptation. However, the maintenance of duplicated genes and their relevance to adaptive evolution has long been debated. Insect trehalase (Treh) plays key roles in energy metabolism, growth, and stress recovery. Here, we show that the duplication of Treh in Lepidoptera (butterflies and moths) is linked with their adaptation to various environmental stresses. Generally, two Treh genes are present in insects: Treh1 and Treh2. We report three distinct forms of Treh in lepidopteran insects, where Treh1 was duplicated into two gene clusters (Treh1a and Treh1b). These gene clusters differ in gene expression patterns, enzymatic properties, and subcellular localizations, suggesting that the enzymes probably underwent sub- and/or neofunctionalization in the lepidopteran insects. Interestingly, selective pressure analysis provided significant evidence of positive selection on duplicate Treh1b gene in lepidopteran insect lineages. Most positively selected sites were located in the alpha-helical region, and several sites were close to the trehalose binding and catalytic sites. Subcellular adaptation of duplicate Treh1b driven by positive selection appears to have occurred as a result of selected changes in specific sequences, allowing for rapid reprogramming of duplicated Treh during evolution. Our results suggest that gene duplication of Treh and subsequent functional diversification could increase the survival rate of lepidopteran insects through various regulations of intracellular trehalose levels, facilitating their adaptation to diverse habitats. This study provides evidence regarding the mechanism by which gene family expansion can contribute to species adaptation through gene duplication and subsequent functional diversification.
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Affiliation(s)
- Yanyan Zhou
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Xiaotong Li
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Susumu Katsuma
- Laboratory of Insect Genetics and Bioscience, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
| | - Yusong Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Liangen Shi
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Toru Shimada
- Laboratory of Insect Genetics and Bioscience, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
| | - Huabing Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China
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Lin Q, Yang J, Wang Q, Zhu H, Chen Z, Dao Y, Wang K. Overexpression of the trehalose-6-phosphate phosphatase family gene AtTPPF improves the drought tolerance of Arabidopsis thaliana. BMC PLANT BIOLOGY 2019; 19:381. [PMID: 31477017 PMCID: PMC6721209 DOI: 10.1186/s12870-019-1986-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 08/26/2019] [Indexed: 05/20/2023]
Abstract
BACKGROUND Trehalose-6-phosphate phosphatases (TPPs), which are encoded by members of the TPP gene family, can improve the drought tolerance of plants. However, the molecular mechanisms underlying the dynamic regulation of TPP genes during drought stress remain unclear. In this study, we explored the function of an Arabidopsis TPP gene by conducting comparative analyses of a loss-of-function mutant and overexpression lines. RESULTS The loss-of-function mutation of Arabidopsis thaliana TPPF, a member of the TPP gene family, resulted in a drought-sensitive phenotype, while a line overexpressing TPPF showed significantly increased drought tolerance and trehalose accumulation. Compared with wild-type plants, tppf1 mutants accumulated more H2O2 under drought, while AtTPPF-overexpressing plants accumulated less H2O2 under drought. Overexpression of AtTPPF led to increased contents of trehalose, sucrose, and total soluble sugars under drought conditions; these compounds may play a role in scavenging reactive oxygen species. Yeast one-hybrid and luciferase activity assays revealed that DREB1A could bind to the DRE/CRT element within the AtTPPF promoter and activate the expression of AtTPPF. A transcriptome analysis of the TPPF-overexpressing plants revealed that the expression levels of drought-repressed genes involved in electron transport activity and cell wall modification were upregulated, while those of stress-related transcription factors related to water deprivation were downregulated. These results indicate that, as well as its involvement in regulating trehalose and soluble sugars, AtTPPF is involved in regulating the transcription of stress-responsive genes. CONCLUSION AtTPPF functions in regulating levels of trehalose, reactive oxygen species, and sucrose levels during drought stress, and the expression of AtTPPF is activated by DREB1A in Arabidopsis. These findings shed light on the molecular mechanism by which AtTPPF regulates the response to drought stress.
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Affiliation(s)
- Qingfang Lin
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
| | - Jiao Yang
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
| | - Qiongli Wang
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
| | - Hong Zhu
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
| | - Zhiyong Chen
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
| | - Yihang Dao
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
| | - Kai Wang
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
- National Engineering Research Center of Sugarcane, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
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Solhaug EM, Johnson E, Carter CJ. Carbohydrate Metabolism and Signaling in Squash Nectaries and Nectar Throughout Floral Maturation. PLANT PHYSIOLOGY 2019; 180:1930-1946. [PMID: 31213512 PMCID: PMC6670107 DOI: 10.1104/pp.19.00470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 06/05/2019] [Indexed: 05/09/2023]
Abstract
Floral nectar is a sugary solution produced by plants to entice pollinator visitation. A general mechanism for nectar secretion has been established from genetic studies in Arabidopsis (Arabidopsis thaliana); however, supporting metabolic and biochemical evidence for this model is scarce in other plant species. We used squash (Cucurbita pepo) to test whether the genetic model of nectar secretion in Arabidopsis is supported at the metabolic level in other species. As such, we analyzed the expression and activity of key enzymes involved in carbohydrate metabolism in squash nectaries throughout floral maturation and the associated starch and soluble sugars, as well as nectar volume and sugar under different growth conditions. Here we show that the steps that are important for nectar secretion in Arabidopsis, including nectary starch degradation, Suc synthesis, and Suc export, are supported by metabolic and biochemical data in C. pepo Additionally, our findings suggest that sugars imported from the phloem during nectar secretion, without prior storage as starch, are important for generating C. pepo nectar. Finally, we predict that trehalose and trehalose 6-P play important regulatory roles in nectary starch degradation and nectar secretion. These data improve our understanding of how nectar is produced in an agronomically relevant species with the potential for use as a model to help us gain insight into the biochemistry and metabolism of nectar secretion in flowering plants.
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Affiliation(s)
- Erik M Solhaug
- Department of Plant & Microbial Biology, University of Minnesota, St. Paul, Minnesota
| | - Elizabeth Johnson
- Department of Plant & Microbial Biology, University of Minnesota, St. Paul, Minnesota
| | - Clay J Carter
- Department of Plant & Microbial Biology, University of Minnesota, St. Paul, Minnesota
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Tian L, Xie Z, Lu C, Hao X, Wu S, Huang Y, Li D, Chen L. The trehalose-6-phosphate synthase TPS5 negatively regulates ABA signaling in Arabidopsis thaliana. PLANT CELL REPORTS 2019; 38:869-882. [PMID: 30963238 DOI: 10.1007/s00299-019-02408-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 03/27/2019] [Indexed: 05/29/2023]
Abstract
The TPS5 negatively regulates ABA signaling by mediating ROS level and NR activity during seed germination and stomatal closure in Arabidopsis thaliana. Trehalose metabolism is important in plant growth and development and in abiotic stress response. Eleven TPS genes were identified in Arabidopsis, divided into Class I (TPS1-TPS4) and Class II (TPS5-TPS11). Although Class I has been shown to have TPS activity, the function of most members of Class II remains enigmatic. Here, we characterized the biological function of the trehalose-6-phosphate synthase TPS5 in ABA signaling in Arabidopsis. TPS5 expression was induced by ABA and abiotic stress, and expression in epidermal and guard cells was dramatically increased after ABA treatment. Loss-of-function analysis revealed that tps5 mutants (tps5-1 and tps5-cas9) are more sensitive to ABA during seed germination and ABA-mediated stomatal closure. Furthermore, the H2O2 level increased in the tps5-1 and tps5-cas9 mutants, which was consistent with the changes in the expression of RbohD and RbohF, key genes responsible for H2O2 production. Further, TPS5 knockout reduced the amounts of trehalose and other soluble carbohydrates as well as nitrate reductase (NR) activity. In vitro, trehalose and other soluble carbohydrates promoted NR activity, which was blocked by the tricarboxylic acid cycle inhibitor iodoacetic acid. Thus, this study identified that TPS5 functions as a negative regulator of ABA signaling and is involved in altering the trehalose content and NR activity.
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Affiliation(s)
- Lianfu Tian
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China
| | - Zijing Xie
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China
| | - Changqing Lu
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China
| | - Xiaohua Hao
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China
| | - Sha Wu
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China
| | - Yuan Huang
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China
| | - Dongping Li
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China.
| | - Liangbi Chen
- Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, No. 36, Lushan Road, Yuelu District, Changsha City, 410081, Hunan Province, China.
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González-Rodríguez T, Cisneros-Hernández I, Acosta Bayona J, Ramírez-Chavez E, Martínez-Gallardo N, Mellado-Mojica E, López-Pérez MG, Molina-Torres J, Délano-Frier J. Identification of Factors Linked to Higher Water-Deficit Stress Tolerance in Amaranthus hypochondriacus Compared to Other Grain Amaranths and A. hybridus, Their Shared Ancestor. PLANTS (BASEL, SWITZERLAND) 2019; 8:E239. [PMID: 31336665 PMCID: PMC6681232 DOI: 10.3390/plants8070239] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 07/15/2019] [Accepted: 07/17/2019] [Indexed: 01/05/2023]
Abstract
Water deficit stress (WDS)-tolerance in grain amaranths (Amaranthus hypochondriacus, A. cruentus and A. caudatus), and A. hybridus, their presumed shared ancestor, was examined. A. hypochondriacus was the most WDS-tolerant species, a trait that correlated with an enhanced osmotic adjustment (OA), a stronger expression of abscisic acid (ABA) marker genes and a more robust sugar starvation response (SSR). Superior OA was supported by higher basal hexose (Hex) levels and high Hex/sucrose (Suc) ratios in A. hypochondriacus roots, which were further increased during WDS. This coincided with increased invertase, amylase and sucrose synthase activities and a strong depletion of the starch reserves in leaves and roots. The OA was complemented by the higher accumulation of proline, raffinose, and other probable raffinose-family oligosaccharides of unknown structure in leaves and/or roots. The latter coincided with a stronger expression of Galactinol synthase 1 and Raffinose synthase in leaves. Increased SnRK1 activity and expression levels of the class II AhTPS9 and AhTPS11 trehalose phosphate synthase genes, recognized as part of the SSR network in Arabidopsis, were induced in roots of stressed A. hypochondriacus. It is concluded that these physiological modifications improved WDS in A. hypochondriacus by raising its water use efficiency.
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Affiliation(s)
- Tzitziki González-Rodríguez
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - Ismael Cisneros-Hernández
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - Jonathan Acosta Bayona
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - Enrique Ramírez-Chavez
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - Norma Martínez-Gallardo
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - Erika Mellado-Mojica
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - Mercedes G López-Pérez
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - Jorge Molina-Torres
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico
| | - John Délano-Frier
- Centro de Investigación y de Estudios Avanzados del I. P. N., Unidad Irapuato, Km 9.6 del Libramiento Norte Carretera Irapuato-León, C.P. 36821 Irapuato, Guanajuato, Mexico.
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Wang H, Yan S, Xin H, Huang W, Zhang H, Teng S, Yu YC, Fernie AR, Lu X, Li P, Li S, Zhang C, Ruan YL, Chen LQ, Lang Z. A Subsidiary Cell-Localized Glucose Transporter Promotes Stomatal Conductance and Photosynthesis. THE PLANT CELL 2019; 31:1328-1343. [PMID: 30996077 PMCID: PMC6588317 DOI: 10.1105/tpc.18.00736] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 03/21/2019] [Accepted: 04/17/2019] [Indexed: 05/04/2023]
Abstract
It has long been recognized that stomatal movement modulates CO2 availability and as a consequence the photosynthetic rate of plants, and that this process is feedback-regulated by photoassimilates. However, the genetic components and mechanisms underlying this regulatory loop remain poorly understood, especially in monocot crop species. Here, we report the cloning and functional characterization of a maize (Zea mays) mutant named closed stomata1 (cst1). Map-based cloning of cst1 followed by confirmation with the clustered regularly interspaced short palindromic repeats (CRISPR)/ CRISPR associated protein 9 system identified the causal mutation in a Clade I Sugars Will Eventually be Exported Transporters (SWEET) family gene, which leads to the E81K mutation in the CST1 protein. CST1 encodes a functional glucose transporter expressed in subsidiary cells, and the E81K mutation strongly impairs the oligomerization and glucose transporter activity of CST1. Mutation of CST1 results in reduced stomatal opening, carbon starvation, and early senescence in leaves, suggesting that CST1 functions as a positive regulator of stomatal opening. Moreover, CST1 expression is induced by carbon starvation and suppressed by photoassimilate accumulation. Our study thus defines CST1 as a missing link in the feedback-regulation of stomatal movement and photosynthesis by photoassimilates in maize.
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Affiliation(s)
- Hai Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
| | - Shijuan Yan
- Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China
| | - Hongjia Xin
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
| | - Wenjie Huang
- Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China
| | - Hao Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
| | - Shouzhen Teng
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
| | - Ya-Chi Yu
- Department of Plant Biology, School of Integrative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Alisdair R. Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Muhlenberg 1, Potsdam-Golm 14476, Germany
| | - Xiaoduo Lu
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, P.R. China
| | - Pengcheng Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
| | - Shengyan Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
| | - Chunyi Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
| | - Yong-Ling Ruan
- School of Environmental & Life Sciences, The University of Newcastle, Callaghan NSW 2308, Australia
| | - Li-Qing Chen
- Department of Plant Biology, School of Integrative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Zhihong Lang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China
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Sun L, Zhang P, Wang R, Wan J, Ju Q, Rothstein SJ, Xu J. The SNAC-A Transcription Factor ANAC032 Reprograms Metabolism in Arabidopsis. PLANT & CELL PHYSIOLOGY 2019; 60:999-1010. [PMID: 30690513 DOI: 10.1093/pcp/pcz015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 01/11/2019] [Indexed: 06/09/2023]
Abstract
Studies have indicated that the carbon starvation response leads to the reprogramming of the transcriptome and metabolome, and many genes, including several important regulators, such as the group S1 basic leucine zipper transcription factors (TFs) bZIP1, bZIP11 and bZIP53, the SNAC-A TF ATAF1, etc., are involved in these physiological processes. Here, we show that the SNAC-A TF ANAC032 also plays important roles in this process. The overexpression of ANAC032 inhibits photosynthesis and induces reactive oxygen species accumulation in chloroplasts, thereby reducing sugar accumulation and resulting in carbon starvation. ANAC032 reprograms carbon and nitrogen metabolism by increasing sugar and amino acid catabolism in plants. The ChIP-qPCR and transient dual-luciferase reporter assays indicated that ANAC032 regulates trehalose metabolism via the direct regulation of TRE1 expression. Taken together, these results show that ANAC032 is an important regulator of the carbon/energy status that represses photosynthesis to induce carbon starvation.
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Affiliation(s)
- Liangliang Sun
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
| | - Ping Zhang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ruling Wang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
| | - Jinpeng Wan
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qiong Ju
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
| | - Steven J Rothstein
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, Canada
| | - Jin Xu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan, China
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Signorelli S, Tarkowski ŁP, Van den Ende W, Bassham DC. Linking Autophagy to Abiotic and Biotic Stress Responses. TRENDS IN PLANT SCIENCE 2019; 24:413-430. [PMID: 30824355 PMCID: PMC6475611 DOI: 10.1016/j.tplants.2019.02.001] [Citation(s) in RCA: 150] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 02/01/2019] [Accepted: 02/04/2019] [Indexed: 05/05/2023]
Abstract
Autophagy is a process in which cellular components are delivered to lytic vacuoles to be recycled and has been demonstrated to promote abiotic/biotic stress tolerance. Here, we review how the responses triggered by stress conditions can affect autophagy and its signaling pathways. Besides the role of SNF-related kinase 1 (SnRK1) and TOR kinases in the regulation of autophagy, abscisic acid (ABA) and its signaling kinase SnRK2 have emerged as key players in the induction of autophagy under stress conditions. Furthermore, an interplay between reactive oxygen species (ROS) and autophagy is observed, ROS being able to induce autophagy and autophagy able to reduce ROS production. We also highlight the importance of osmotic adjustment for the successful performance of autophagy and discuss the potential role of GABA in plant survival and ethylene (ET)-induced autophagy.
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Affiliation(s)
- Santiago Signorelli
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium; Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Montevideo 12900, Uruguay.
| | | | - Wim Van den Ende
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium
| | - Diane C Bassham
- Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011, USA
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Wang X, Du Y, Yu D. Trehalose phosphate synthase 5-dependent trehalose metabolism modulates basal defense responses in Arabidopsis thaliana. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2019; 61:509-527. [PMID: 30058771 DOI: 10.1111/jipb.12704] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 07/21/2018] [Indexed: 06/08/2023]
Abstract
Despite the recent discovery that trehalose synthesis is important for plant development and abiotic stress tolerance, the effects of trehalose on biotic stress responses remain relatively unknown. In this study, we demonstrate that TREHALOSE PHOSPHATE SYNTHASE 5 (TPS5)-dependent trehalose metabolism regulates Arabidopsis thaliana defenses against pathogens (necrotrophic Botrytis cinerea and biotrophic Pseudomonas syringae). Pathogen infection increased trehalose levels and upregulated TPS5 expression. Application of exogenous trehalose significantly improved plant defenses against B. cinerea, but increased the susceptibility of plants to P. syringae. We demonstrate that elevated trehalose biosynthesis, in transgenic plants over-expressing TPS5, also increased the susceptibility to P. syringae, but decreased the disease symptoms caused by B. cinerea. The knockout of TPS5 prevented the accumulation of trehalose and enhanced defense responses against P. syringae. Additionally, we observed that a TPS5-interacting protein (multiprotein bridging factor 1c) was required for induced expression of TPS5 during pathogen infections. Furthermore, we show that trehalose promotes P. syringae growth and disease development, via a mechanism involving suppression of the plant defense gene, Pathogenesis-Related Protein 1. These findings provide insight into the function of TPS5-dependent trehalose metabolism in plant basal defense responses.
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Affiliation(s)
- Xuelan Wang
- Key Laboratory of Tropical Plant Resources and Sustainable Use,, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Du
- Key Laboratory of Tropical Plant Resources and Sustainable Use,, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China
| | - Diqiu Yu
- Key Laboratory of Tropical Plant Resources and Sustainable Use,, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China
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Ding Z, Tie W, Fu L, Yan Y, Liu G, Yan W, Li Y, Wu C, Zhang J, Hu W. Strand-specific RNA-seq based identification and functional prediction of drought-responsive lncRNAs in cassava. BMC Genomics 2019; 20:214. [PMID: 30866814 PMCID: PMC6417064 DOI: 10.1186/s12864-019-5585-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 03/05/2019] [Indexed: 12/21/2022] Open
Abstract
Background Long noncoding RNAs (lncRNAs) have emerged as playing crucial roles in abiotic stress responsive regulation, however, the mechanism of lncRNAs underlying drought-tolerance remains largely unknown in cassava, an important tropical and sub-tropical root crop of remarkable drought tolerance. Results In this study, a total of 833 high-confidence lncRNAs, including 652 intergenic and 181 anti-sense lncRNAs, were identified in cassava leaves and root using strand-specific RNA-seq technology, of which 124 were drought-responsive. Trans-regulatory co-expression network revealed that lncRNAs exhibited tissue-specific expression patterns and they preferred to function differently in distinct tissues: e.g., cell-related metabolism, cell wall, and RNA regulation of transcription in folded leaf (FL); degradation of major carbohydrate (CHO) metabolism, calvin cycle and light reaction, light signaling, and tetrapyrrole synthesis in full expanded leaf (FEL); synthesis of major CHO metabolism, nitrogen-metabolism, photosynthesis, and redox in bottom leaf (BL); and hormone metabolism, secondary metabolism, calcium signaling, and abiotic stress in root (RT). In addition, 27 lncRNA-mRNA pairs referred to cis-acting regulation were identified, and these lncRNAs regulated the expression of their neighboring genes mainly through hormone metabolism, RNA regulation of transcription, and signaling of receptor kinase. Besides, 11 lncRNAs were identified acting as putative target mimics of known miRNAs in cassava. Finally, five drought-responsive lncRNAs and 13 co-expressed genes involved in trans-acting, cis-acting, or target mimic regulation were selected and confirmed by qRT-PCR. Conclusions These findings provide a comprehensive view of cassava lncRNAs in response to drought stress, which will enable in-depth functional analysis in the future. Electronic supplementary material The online version of this article (10.1186/s12864-019-5585-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zehong Ding
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China.
| | - Weiwei Tie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China
| | - Lili Fu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China
| | - Yan Yan
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China
| | - Guanghua Liu
- Institute of Tropical and Sub-tropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan, Yunnan, China
| | - Wei Yan
- Institute of Tropical and Sub-tropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan, Yunnan, China
| | - Yanan Li
- Institute of Tropical and Sub-tropical Cash Crops, Yunnan Academy of Agricultural Sciences, Baoshan, Yunnan, China
| | - Chunlai Wu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China.,Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Chinese National Center of Plant Gene Research (Wuhan) HUST Part, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology (HUST), Wuhan, China
| | - Jiaming Zhang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China
| | - Wei Hu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan, China.
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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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Janse van Rensburg HC, Van den Ende W, Signorelli S. Autophagy in Plants: Both a Puppet and a Puppet Master of Sugars. FRONTIERS IN PLANT SCIENCE 2019; 10:14. [PMID: 30723485 PMCID: PMC6349728 DOI: 10.3389/fpls.2019.00014] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 01/07/2019] [Indexed: 05/20/2023]
Abstract
Autophagy is a major pathway that recycles cellular components in eukaryotic cells both under stressed and non-stressed conditions. Sugars participate both metabolically and as signaling molecules in development and response to various environmental and nutritional conditions. It is therefore essential to maintain metabolic homeostasis of sugars during non-stressed conditions in cells, not only to provide energy, but also to ensure effective signaling when exposed to stress. In both plants and animals, autophagy is activated by the energy sensor SnRK1/AMPK and inhibited by TOR kinase. SnRK1/AMPK and TOR kinases are both important regulators of cellular metabolism and are controlled to a large extent by the availability of sugars and sugar-phosphates in plants whereas in animals AMP/ATP indirectly translate sugar status. In plants, during nutrient and sugar deficiency, SnRK1 is activated, and TOR is inhibited to allow activation of autophagy which in turn recycles cellular components in an attempt to provide stress relief. Autophagy is thus indirectly regulated by the nutrient/sugar status of cells, but also regulates the level of nutrients/sugars by recycling cellular components. In both plants and animals sugars such as trehalose induce autophagy and in animals this is independent of the TOR pathway. The glucose-activated G-protein signaling pathway has also been demonstrated to activate autophagy, although the exact mechanism is not completely clear. This mini-review will focus on the interplay between sugar signaling and autophagy.
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Affiliation(s)
| | - Wim Van den Ende
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium
| | - Santiago Signorelli
- Laboratory of Molecular Plant Biology, KU Leuven, Leuven, Belgium
- Departamento de Biologiía Vegetal, Facultad de Agronomía, Universidad de la Repuíblica, Montevideo, Uruguay
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Pina-Martins F, Baptista J, Pappas G, Paulo OS. New insights into adaptation and population structure of cork oak using genotyping by sequencing. GLOBAL CHANGE BIOLOGY 2019; 25:337-350. [PMID: 30358018 DOI: 10.1111/gcb.14497] [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: 08/10/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 05/25/2023]
Abstract
Species respond to global climatic changes in a local context. Understanding this process, including its speed and intensity, is paramount due to the pace at which such changes are currently occurring. Tree species are particularly interesting to study in this regard due to their long generation times, sedentarism, and ecological and economic importance. Quercus suber L. is an evergreen forest tree species of the Fagaceae family with an essentially Western Mediterranean distribution. Despite frequent assessments of the species' evolutionary history, large-scale genetic studies have mostly relied on plastidial markers, whereas nuclear markers have been used on studies with locally focused sampling strategies. In this work, "Genotyping by sequencing" is used to derive 1,996 single nucleotide polymorphism markers to assess the species' evolutionary history from a nuclear DNA perspective, gain insights into how local adaptation is shaping the species' genetic background, and to forecast how Q. suber may respond to global climatic changes from a genetic perspective. Results reveal (a) an essentially unstructured species, where (b) a balance between gene flow and local adaptation keeps the species' gene pool somewhat homogeneous across its distribution, but still allowing (c) variation clines for the individuals to cope with local conditions. "Risk of Non-Adaptedness" (RONA) analyses suggest that for the considered variables and most sampled locations, (d) the cork oak should not require large shifts in allele frequencies to survive the predicted climatic changes. Future directions include integrating these results with ecological niche modeling perspectives, improving the RONA methodology, and expanding its use to other species. With the implementation presented in this work, the RONA can now also be easily assessed for other organisms.
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Affiliation(s)
- Francisco Pina-Martins
- Computational Biology and Population Genomics Group, Departamento de Biologia Animal, Faculdade de Ciências, Centre for Ecology, Evolution and Environmental Changes, Universidade de Lisboa, Lisboa, Portugal
| | - João Baptista
- Department of Biology, CESAM, University of Aveiro, Aveiro, Portugal
| | - Georgios Pappas
- Department of Cell Biology, University of Brasilia, Brasilia, Brazil
| | - Octávio S Paulo
- Computational Biology and Population Genomics Group, Departamento de Biologia Animal, Faculdade de Ciências, Centre for Ecology, Evolution and Environmental Changes, Universidade de Lisboa, Lisboa, Portugal
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Macovei A, Pagano A, Cappuccio M, Gallotti L, Dondi D, De Sousa Araujo S, Fevereiro P, Balestrazzi A. A Snapshot of the Trehalose Pathway During Seed Imbibition in Medicago truncatula Reveals Temporal- and Stress-Dependent Shifts in Gene Expression Patterns Associated With Metabolite Changes. FRONTIERS IN PLANT SCIENCE 2019; 10:1590. [PMID: 31921241 PMCID: PMC6930686 DOI: 10.3389/fpls.2019.01590] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/12/2019] [Indexed: 05/21/2023]
Abstract
Trehalose, a non-reducing disaccharide with multiple functions, among which source of energy and carbon, stress protectant, and signaling molecule, has been mainly studied in relation to plant development and response to stress. The trehalose pathway is conserved among different organisms and is composed of three enzymes: trehalose-6-phosphate synthase (TPS), which converts uridine diphosphate (UDP)-glucose and glucose-6-phosphate to trehalose-6-phosphate (T6P), trehalose-6-phosphatase (TPP), which dephosphorylates T6P to produce trehalose, and trehalase (TRE), responsible for trehalose catabolism. In plants, the trehalose pathway has been mostly studied in resurrection plants and the model plant Arabidopsis thaliana, where 11 AtTPS, 10 AtTPP, and 1 AtTRE genes are present. Here, we aim to investigate the involvement of the trehalose pathway in the early stages of seed germination (specifically, seed imbibition) using the model legume Medicago truncatula as a working system. Since not all the genes belonging to the trehalose pathway had been identified in M. truncatula, we first conducted an in silico analysis using the orthologous gene sequences from A. thaliana. Nine MtTPSs, eight MtTPPs, and a single MtTRE gene were hereby identified. Subsequently, the expression profiles of all the genes (together with the sucrose master-regulator SnRK1) were investigated during seed imbibition with water or stress agents (polyethylene glycol and sodium chloride). The reported data show a temporal distribution and preferential expression of specific TPS and TPP isoforms during seed imbibition with water. Moreover, it was possible to distinguish a small set of genes (e.g., MtTPS1, MtTPS7, MtTPS10, MtTPPA, MtTPPI, MtTRE) having a potential impact as precocious hallmarks of the seed response to stress. When the trehalose levels were measured by high-performance liquid chromatography, a significant decrease was observed during seed imbibition, suggesting that trehalose may act as an energy source rather than osmoprotectant. This is the first report investigating the expression profiles of genes belonging to the trehalose pathway during seed imbibition, thus ascertaining their involvement in the pre-germinative metabolism and their potential as tools to improve seed germination efficiency.
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Affiliation(s)
- Anca Macovei
- Department of Biology and Biotechnology “L. Spallanzani,” University of Pavia, Pavia, Italy
| | - Andrea Pagano
- Department of Biology and Biotechnology “L. Spallanzani,” University of Pavia, Pavia, Italy
| | - Michela Cappuccio
- Department of Biology and Biotechnology “L. Spallanzani,” University of Pavia, Pavia, Italy
- Instituto de Tecnologia Química e Biológica António Xavier (ITQB-NOVA), Green-it Research Unit, Oeiras, Portugal
| | - Lucia Gallotti
- Department of Chemistry, University of Pavia, Pavia, Italy
| | - Daniele Dondi
- Department of Chemistry, University of Pavia, Pavia, Italy
| | - Susana De Sousa Araujo
- Instituto de Tecnologia Química e Biológica António Xavier (ITQB-NOVA), Green-it Research Unit, Oeiras, Portugal
| | - Pedro Fevereiro
- Instituto de Tecnologia Química e Biológica António Xavier (ITQB-NOVA), Green-it Research Unit, Oeiras, Portugal
- Departamento de Biologia Vegetal, Faculdade de Ciências da Universidade de Lisboa, Lisboa, Portugal
| | - Alma Balestrazzi
- Department of Biology and Biotechnology “L. Spallanzani,” University of Pavia, Pavia, Italy
- *Correspondence: Alma Balestrazzi,
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Yoshida T, Obata T, Feil R, Lunn JE, Fujita Y, Yamaguchi-Shinozaki K, Fernie AR. The Role of Abscisic Acid Signaling in Maintaining the Metabolic Balance Required for Arabidopsis Growth under Nonstress Conditions. THE PLANT CELL 2019; 31:84-105. [PMID: 30606780 PMCID: PMC6391705 DOI: 10.1105/tpc.18.00766] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 12/25/2018] [Indexed: 05/04/2023]
Abstract
Abscisic acid (ABA) is a plant hormone that regulates a diverse range of cellular and molecular processes during development and in response to osmotic stress. In Arabidopsis (Arabidopsis thaliana), three Suc nonfermenting-1-related protein kinase2s (SnRK2s), SRK2D, SRK2E, and SRK2I, are key positive regulators involved in ABA signaling whose substrates have been well studied. Besides reduced drought-stress tolerance, the srk2d srk2e srk2i mutant shows abnormal growth phenotypes, such as an increased number of leaves, under nonstress conditions. However, it remains unclear whether, and if so how, SnRK2-mediated ABA signaling regulates growth and development. Here, we show that the primary metabolite profile of srk2d srk2e srk2i grown under nonstress conditions was considerably different from that of wild-type plants. The metabolic changes observed in the srk2d srk2e srk2i were similar to those in an ABA-biosynthesis mutant, aba2-1, and both mutants showed a higher leaf emergence rate than wild type. Consistent with the increased amounts of citrate, isotope-labeling experiments revealed that respiration through the tricarboxylic acid cycle was enhanced in srk2d srk2e srk2i These results, together with transcriptome data, indicate that the SnRK2s involved in ABA signaling modulate metabolism and leaf growth under nonstress conditions by fine-tuning flux through the tricarboxylic acid cycle.
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Affiliation(s)
- Takuya Yoshida
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
- Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 113-8657 Tokyo, Japan
| | - Toshihiro Obata
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
| | - Regina Feil
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
| | - John E. Lunn
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
| | - Yasunari Fujita
- Biological Resources and Post-Harvest Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, 305-8686 Ibaraki, Japan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8577 Ibaraki, Japan
| | - Kazuko Yamaguchi-Shinozaki
- Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 113-8657 Tokyo, Japan
| | - Alisdair R. Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany
- Address correspondence to
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Scoffoni C, Albuquerque C, Cochard H, Buckley TN, Fletcher LR, Caringella MA, Bartlett M, Brodersen CR, Jansen S, McElrone AJ, Sack L. The Causes of Leaf Hydraulic Vulnerability and Its Influence on Gas Exchange in Arabidopsis thaliana. PLANT PHYSIOLOGY 2018; 178:1584-1601. [PMID: 30366978 PMCID: PMC6288733 DOI: 10.1104/pp.18.00743] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 10/15/2018] [Indexed: 05/04/2023]
Abstract
The influence of the dynamics of leaf hydraulic conductance (K leaf) diurnally and during dehydration on stomatal conductance and photosynthesis remains unclear. Using the model species Arabidopsis (Arabidopsis thaliana ecotype Columbia-0), we applied a multitiered approach including physiological measurements, high-resolution x-ray microcomputed tomography, and modeling at a range of scales to characterize (1) K leaf decline during dehydration; (2) its basis in the hydraulic conductances of leaf xylem and outside-xylem pathways (K ox); (3) the dependence of its dynamics on irradiance; (4) its impact on diurnal patterns of stomatal conductance and photosynthetic rate; and (5) its influence on gas exchange and survival under simulated drought regimes. Arabidopsis leaves showed strong vulnerability to dehydration diurnally in both gas exchange and hydraulic conductance, despite lack of xylem embolism or conduit collapse above the turgor loss point, indicating a pronounced sensitivity of K ox to dehydration. K leaf increased under higher irradiance in well-hydrated leaves across the full range of water potential, but no shift in K leaf vulnerability was observed. Modeling indicated that responses to dehydration and irradiance are likely attributable to changes in membrane permeability and that a dynamic K ox would contribute strongly to stomatal closure, improving performance, survival, and efficient water use during drought. These findings for Columbia-0 provide a baseline for assessing variation across genotypes in hydraulic traits and their influence on gas exchange during dehydration.
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Affiliation(s)
- Christine Scoffoni
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California 90095
- Department of Biological Sciences, California State University, Los Angeles, California 90032
| | - Caetano Albuquerque
- Department of Viticulture and Enology, University of California, Davis, California 95616
| | - Hervé Cochard
- Université Clermont-Auvergne, Institut National de la Recherche Agronomique, PIAF, F-63000 Clermont-Ferrand, France
| | - Thomas N Buckley
- Department of Plant Sciences, University of California, Davis, California 95616
| | - Leila R Fletcher
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California 90095
| | - Marissa A Caringella
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California 90095
| | - Megan Bartlett
- Princeton Environmental Institute, Princeton University, Princeton, New Jersey 08544
| | - Craig R Brodersen
- School of Forestry and Environmental Studies, Yale University, New Haven, Connecticut 06511
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, Germany 89081
| | - Andrew J McElrone
- Department of Viticulture and Enology, University of California, Davis, California 95616
- United States Department of Agriculture-Agricultural Research Service, Davis, California 95616
| | - Lawren Sack
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California 90095
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Yoshida T, Anjos LD, Medeiros DB, Araújo WL, Fernie AR, Daloso DM. Insights into ABA-mediated regulation of guard cell primary metabolism revealed by systems biology approaches. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2018; 146:37-49. [PMID: 30447225 DOI: 10.1016/j.pbiomolbio.2018.11.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/02/2018] [Accepted: 11/13/2018] [Indexed: 01/08/2023]
Abstract
Despite the fact that guard cell abscisic acid (ABA) signalling pathway is well documented, our understanding concerning how and to which extent ABA regulates guard cell metabolism remains fragmentary. Here we have adopted different systems approaches to investigate how ABA modulates guard cell central metabolism by providing genes that are possibly ABA-regulated. By using previous published Arabidopsis guard cell transcript profiling data, we carried out an extensive co-expression network analysis using ABA-related genes and those related to the metabolism and transport of sugars, starch and organic acids. Next, we investigated the presence of ABA responsive elements (ABRE) in the promoter of genes that are highly expressed in guard cells, responsive to ABA and co-expressed with ABA-related genes. Together, these analyses indicated that 44 genes are likely regulated by ABA and 8 of them are highly expressed in guard cells in both the presence and absence of ABA, including genes of the tricarboxylic acid cycle and those related to sucrose and hexose transport and metabolism. It seems likely that ABA may modulate both sucrose transport through guard cell plasma membrane and sucrose metabolism within guard cells. In this context, genes associated with sucrose synthase, sucrose phosphate synthase, trehalose-6-phosphate, invertase, UDP-glucose epimerase/pyrophosphorylase and different sugar transporters contain ABRE in their promoter and are thus possibly ABA regulated. Although validation experiments are required, our study highlights the importance of systems biology approaches to drive new hypothesis and to unravel genes and pathways that are regulated by ABA in guard cells.
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Affiliation(s)
- Takuya Yoshida
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam, Golm, 14476, Germany.
| | - Letícia Dos Anjos
- Departamento de Biologia Vegetal, Universidade Federal de Lavras, Lavras, Minas Gerais, 62700-000, Brazil
| | - David B Medeiros
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam, Golm, 14476, Germany; Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Wagner L Araújo
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam, Golm, 14476, Germany
| | - Danilo M Daloso
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, 60451-970, Brazil.
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Hitting the Wall-Sensing and Signaling Pathways Involved in Plant Cell Wall Remodeling in Response to Abiotic Stress. PLANTS 2018; 7:plants7040089. [PMID: 30360552 PMCID: PMC6313904 DOI: 10.3390/plants7040089] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 10/16/2018] [Accepted: 10/16/2018] [Indexed: 11/24/2022]
Abstract
Plant cells are surrounded by highly dynamic cell walls that play important roles regulating aspects of plant development. Recent advances in visualization and measurement of cell wall properties have enabled accumulation of new data about wall architecture and biomechanics. This has resulted in greater understanding of the dynamics of cell wall deposition and remodeling. The cell wall is the first line of defense against different adverse abiotic and biotic environmental influences. Different abiotic stress conditions such as salinity, drought, and frost trigger production of Reactive Oxygen Species (ROS) which act as important signaling molecules in stress activated cellular responses. Detection of ROS by still-elusive receptors triggers numerous signaling events that result in production of different protective compounds or even cell death, but most notably in stress-induced cell wall remodeling. This is mediated by different plant hormones, of which the most studied are jasmonic acid and brassinosteroids. In this review we highlight key factors involved in sensing, signal transduction, and response(s) to abiotic stress and how these mechanisms are related to cell wall-associated stress acclimatization. ROS, plant hormones, cell wall remodeling enzymes and different wall mechanosensors act coordinately during abiotic stress, resulting in abiotic stress wall acclimatization, enabling plants to survive adverse environmental conditions.
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49
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Medeiros DB, Perez Souza L, Antunes WC, Araújo WL, Daloso DM, Fernie AR. Sucrose breakdown within guard cells provides substrates for glycolysis and glutamine biosynthesis during light-induced stomatal opening. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018. [PMID: 29543357 DOI: 10.1111/tpj.13889] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Sucrose has long been thought to play an osmolytic role in stomatal opening. However, recent evidence supports the idea that the role of sucrose in this process is primarily energetic. Here we used a combination of stomatal aperture assays and kinetic [U-13 C]-sucrose isotope labelling experiments to confirm that sucrose is degraded during light-induced stomatal opening and to define the fate of the C released from sucrose breakdown. We additionally show that addition of sucrose to the medium did not enhance light-induced stomatal opening. The isotope experiment showed a consistent 13 C enrichment in fructose and glucose, indicating that during light-induced stomatal opening sucrose is indeed degraded. We also observed a clear 13 C enrichment in glutamate and glutamine (Gln), suggesting a concerted activation of sucrose degradation, glycolysis and the tricarboxylic acid cycle. This is in contrast to the situation for Gln biosynthesis in leaves under light, which has been demonstrated to rely on previously stored C. Our results thus collectively allow us to redraw current models concerning the influence of sucrose during light-induced stomatal opening, in which, instead of being accumulated, sucrose is degraded providing C skeletons for Gln biosynthesis.
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Affiliation(s)
- David B Medeiros
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Leonardo Perez Souza
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
| | - Werner C Antunes
- Departamento de Biologia, Universidade Estadual de Maringá, Maringá, Paraná, 87020-900, Brazil
| | - Wagner L Araújo
- Max-Planck Partner Group, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Danilo M Daloso
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, 60440-970, Brazil
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, Potsdam-Golm, 14476, Germany
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50
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First echinoderm trehalase from a tropical sea cucumber (Holothuria leucospilota): Molecular cloning and mRNA expression in different tissues, embryonic and larval stages, and under a starvation challenge. Gene 2018; 665:74-81. [PMID: 29719214 DOI: 10.1016/j.gene.2018.04.085] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/11/2018] [Accepted: 04/27/2018] [Indexed: 12/20/2022]
Abstract
Trehalases are a group of enzymes that catalyse the conversion of trehalose to glucose, and they are observed in most organisms. In this study, the first echinoderm trehalase, designated Hl-Tre, was identified from a tropical sea cucumber, Holothuria leucospilota. The full-length cDNA of H. leucospilota trehalase (Hl-Tre) is 2461 bp in length with an open reading frame (ORF) of 1788 bp that encodes a 595-amino-acid protein with a deduced molecular weight of 67.95 KDa. The Hl-Tre protein contains a signal peptide at the N-terminal and a functional trehalase domain, which includes the signature motifs 1 and 2. The mRNA expression of Hl-Tre was ubiquitously detected in all selected tissues, with the highest level being detected in the intestine. By in situ hybridization (ISH), the positive Hl-Tre signals were observed in the brush borders of the intestinal mucosa. In embryonic and larval stages, the transcript levels of Hl-Tre decreased during embryonic development and increased after the pentactula stage. After a challenge of starvation, the intestinal Hl-Tre mRNA levels were observed to be first decreased and partially recovered thereafter. Overall, our study provided the first evidence for trehalase in echinoderms and showed that this enzyme was potentially linked to a trehalose metabolic pathway in sea cucumbers.
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