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Feng Z, Xu Y, Xie Z, Yang Y, Lu G, Jin Y, Wang M, Liu M, Yang H, Li W, Liang Z. Overexpression of Abscisic Acid Biosynthesis Gene OsNCED3 Enhances Survival Rate and Tolerance to Alkaline Stress in Rice Seedlings. PLANTS (BASEL, SWITZERLAND) 2024; 13:1713. [PMID: 38931145 PMCID: PMC11207436 DOI: 10.3390/plants13121713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/18/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024]
Abstract
Alkaline stress with high pH levels could significantly influence plant growth and survival. The enzyme 9-cis-epoxycarotenoid dioxygenase (NCED) serves as a critical bottleneck in the biosynthesis of abscisic acid (ABA), making it essential for regulating stress tolerance. Here, we show that OsNCED3-overexpressing rice lines have increased ABA content by up to 50.90% and improved transcription levels of numerous genes involved in stress responses that significantly enhance seedling survival rates. Overexpression of OsNCED3 increased the dry weight contents of the total chlorophyll, proline, soluble sugar, starch, and the activities of antioxidant enzymes of rice seedlings, while reducing the contents of O2·-, H2O2, and malondialdehyde under hydroponic alkaline stress conditions simulated by 10, 15, and 20 mmol L-1 of Na2CO3. Additionally, the OsNCED3-overexpressing rice lines exhibited a notable increase in the expression of OsNCED3; ABA response-related genes OsSalT and OsWsi18; ion homeostasis-related genes OsAKT1, OsHKT1;5, OsSOS1, and OsNHX5; and ROS scavenging-related genes OsCu/Zn-SOD, OsFe-SOD, OsPOX1, OsCATA, OsCATB, and OsAPX1 in rice seedling leaves. The results of these findings suggest that overexpression of OsNCED3 upregulates endogenous ABA levels and the expression of stress response genes, which represents an innovative molecular approach for enhancing the alkaline tolerance of rice seedlings.
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Affiliation(s)
- Zhonghui Feng
- College of Life Science, Baicheng Normal University, Baicheng 137000, China; (Z.F.); (Z.X.); (Y.Y.)
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
| | - Yang Xu
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
| | - Zhiming Xie
- College of Life Science, Baicheng Normal University, Baicheng 137000, China; (Z.F.); (Z.X.); (Y.Y.)
| | - Yaqiong Yang
- College of Life Science, Baicheng Normal University, Baicheng 137000, China; (Z.F.); (Z.X.); (Y.Y.)
| | - Guanru Lu
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
| | - Yangyang Jin
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
| | - Mingming Wang
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
- Jilin Da’an Farmland Ecosystem National Observation and Research Station, Da’an 131317, China
| | - Miao Liu
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
- Jilin Da’an Farmland Ecosystem National Observation and Research Station, Da’an 131317, China
| | - Haoyu Yang
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
- Jilin Da’an Farmland Ecosystem National Observation and Research Station, Da’an 131317, China
| | - Weiqiang Li
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
- Jilin Da’an Farmland Ecosystem National Observation and Research Station, Da’an 131317, China
| | - Zhengwei Liang
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (Y.X.); (G.L.); (Y.J.); (M.W.); (M.L.); (H.Y.)
- Jilin Da’an Farmland Ecosystem National Observation and Research Station, Da’an 131317, China
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2
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Kim GE, Sung J. ABA-dependent suberization and aquaporin activity in rice ( Oryza sativa L.) root under different water potentials. FRONTIERS IN PLANT SCIENCE 2023; 14:1219610. [PMID: 37746006 PMCID: PMC10512726 DOI: 10.3389/fpls.2023.1219610] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/01/2023] [Indexed: 09/26/2023]
Abstract
Drought is one of the most stressful environments limiting crop growth and yield throughout the world. Therefore, most efforts have been made to document drought-derived genetic and physiological responses and to find better ways to improve drought tolerance. The interaction among them is unclear and/or less investigated. Therefore, the current study is to find a clue of metabolic connectivity among them in rice root experiencing different levels of drought condition. We selected 19 genes directly involved in abscisic acid (ABA) metabolism (6), suberization (6), and aquaporins (AQPs) activity (7) and analyzed the relatively quantitative gene expression using qRT-PCR from rice roots. In addition, we also analyzed proline, chlorophyll, and fatty acids and observed cross-sectional root structure (aerenchyma) and suberin lamella deposition in the endodermis. All drought conditions resulted in an obvious development of aerenchyma and two- to fourfold greater accumulation of proline. The limited water supply (-1.0 and -1.5 MPa) significantly increased gene expression (ABA metabolism, suberization, and AQPs) and developed greater layer of suberin lamella in root endodermis. In addition, the ratio of the unsaturated to the saturated fatty acids was increased, which could be considered as an adjusted cell permeability. Interestingly, these metabolic adaptations were an exception with a severe drought condition (hygroscopic coefficient, -3.1 MPa). Accordingly, we concluded that the drought-tolerant mechanism in rice roots is sophisticatedly regulated until permanent wilting point (-1.5 MPa), and ABA metabolism, suberization, and AQPs activity might be independent and/or concurrent process as a survival strategy against drought.
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Affiliation(s)
| | - Jwakyung Sung
- Deptment of Crop Science, Chungbuk National University, Cheong-ju, Republic of Korea
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3
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Lin HA, Coker HR, Howe JA, Tfaily MM, Nagy EM, Antony-Babu S, Hague S, Smith AP. Progressive drought alters the root exudate metabolome and differentially activates metabolic pathways in cotton ( Gossypium hirsutum). FRONTIERS IN PLANT SCIENCE 2023; 14:1244591. [PMID: 37711297 PMCID: PMC10499043 DOI: 10.3389/fpls.2023.1244591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 08/14/2023] [Indexed: 09/16/2023]
Abstract
Root exudates comprise various primary and secondary metabolites that are responsive to plant stressors, including drought. As increasing drought episodes are predicted with climate change, identifying shifts in the metabolome profile of drought-induced root exudation is necessary to understand the molecular interactions that govern the relationships between plants, microbiomes, and the environment, which will ultimately aid in developing strategies for sustainable agriculture management. This study utilized an aeroponic system to simulate progressive drought and recovery while non-destructively collecting cotton (Gossypium hirsutum) root exudates. The molecular composition of the collected root exudates was characterized by untargeted metabolomics using Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) and mapped to the Kyoto Encyclopedia of Genes and Genomes (KEGG) databases. Over 700 unique drought-induced metabolites were identified throughout the water-deficit phase. Potential KEGG pathways and KEGG modules associated with the biosynthesis of flavonoid compounds, plant hormones (abscisic acid and jasmonic acid), and other secondary metabolites were highly induced under severe drought, but not at the wilting point. Additionally, the associated precursors of these metabolites, such as amino acids (phenylalanine and tyrosine), phenylpropanoids, and carotenoids, were also mapped. The potential biochemical transformations were further calculated using the data generated by FT-ICR MS. Under severe drought stress, the highest number of potential biochemical transformations, including methylation, ethyl addition, and oxidation/hydroxylation, were identified, many of which are known reactions in some of the mapped pathways. With the application of FT-ICR MS, we revealed the dynamics of drought-induced secondary metabolites in root exudates in response to drought, providing valuable information for drought-tolerance strategies in cotton.
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Affiliation(s)
- Heng-An Lin
- Department of Soil and Crop Sciences, Texas A&M University and Texas A&M AgriLife Research, College Station, TX, United States
| | - Harrison R. Coker
- Department of Soil and Crop Sciences, Texas A&M University and Texas A&M AgriLife Research, College Station, TX, United States
| | - Julie A. Howe
- Department of Soil and Crop Sciences, Texas A&M University and Texas A&M AgriLife Research, College Station, TX, United States
| | - Malak M. Tfaily
- Department of Environmental Science, University of Arizona, Tucson, AZ, United States
| | - Elek M. Nagy
- Department of Plant Pathology and Microbiology, Texas A&M University and Texas A&M AgriLife Research, College Station, TX, United States
| | - Sanjay Antony-Babu
- Department of Plant Pathology and Microbiology, Texas A&M University and Texas A&M AgriLife Research, College Station, TX, United States
| | - Steve Hague
- Department of Soil and Crop Sciences, Texas A&M University and Texas A&M AgriLife Research, College Station, TX, United States
| | - A. Peyton Smith
- Department of Soil and Crop Sciences, Texas A&M University and Texas A&M AgriLife Research, College Station, TX, United States
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Falik O, Novoplansky A. Is ABA the exogenous vector of interplant drought cuing? PLANT SIGNALING & BEHAVIOR 2022; 17:2129295. [PMID: 36200554 PMCID: PMC9542707 DOI: 10.1080/15592324.2022.2129295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/22/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
We have recently demonstrated that root cuing from drought-stressed plants increased the survival time of neighboring plants under drought, which came at performance costs under benign conditions. The involvement of abscisic acid (ABA) was implicated from additional experiments in which interplant drought cuing was greatly diminished in ABA-deficient plants. Here, we tested the hypothesis that ABA is the exogenous vector of interplant drought cuing. Pisum sativum plants were grown in rows of three split-root plants. One of the roots of the first plant was subjected to either drought of benign conditions in one rooting vial, while its other root shared its rooting vial with one of the roots of an unstressed neighbor, which in turn shared its other rooting vial with an additional unstressed neighbor. One hour after subjecting one of the roots of the first plant to drought, ABA concentrations were 106% and 145% higher around its other root and the roots of its unstressed neighbor, compared to their respective unstressed controls; however, the absolute concentrations of ABA found in the rooting media were substantially low. The results may indicate that despite its involvement in interplant drought and the commonly observed exchange of ABA between drought-stressed plants and their rhizospheres, ABA is not directly involved in exogenous interplant drought cuing. However, previous studies have shown that even minute concentrations of ABA in the rhizosphere can prevent ABA leakage from roots and thus to significantly increase endogenous ABA levels. In addition, under drought conditions, plants tend to accumulate ABA, which could markedly increase internal ABA concentrations over time and ABA concentrations in close proximity to the root surface might be significantly greater than estimated from entire rooting volumes. Finally, phaseic acid, an ABA degradation product, is known to activate various ABA receptors, which could enhance plant drought tolerance. It is thus feasible that while the role of ABA is limited, its more stable degradation products could play a significant role in interplant drought cuing. Our preliminary findings call for an extensive investigation into the identity and modes of operation of the exogenous vectors of interplant drought cuing.
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Affiliation(s)
- Omer Falik
- Achva Academic College, Ashqelon, Israel
- Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Israel
| | - Ariel Novoplansky
- Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Israel
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Wang K, Xu F, Yuan W, Ding Y, Sun L, Feng Z, Liu X, Xu W, Zhang J, Wang F. Elevated
CO
2
enhances rice root growth under alternate wetting and drying irrigation by involving
ABA
response: Evidence from the seedling stage. Food Energy Secur 2022. [DOI: 10.1002/fes3.442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Ke Wang
- Institute of Soil and Fertilizer Fujian Academy of Agricultural Sciences Fuzhou China
| | - Feiyun Xu
- College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Fuzhou China
| | - Wei Yuan
- College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Fuzhou China
| | - Yexin Ding
- College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Fuzhou China
| | - Leyun Sun
- College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Fuzhou China
| | - Zhiwei Feng
- College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Fuzhou China
| | - Xin Liu
- College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Fuzhou China
| | - Weifeng Xu
- College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Fuzhou China
| | - Jianhua Zhang
- Department of Biology Hong Kong Baptist University Hong Kong China
| | - Fei Wang
- Institute of Soil and Fertilizer Fujian Academy of Agricultural Sciences Fuzhou China
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6
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Wang Z, Yao Y, Yang Y. Fulvic acid-like substance-Ca(II) complexes improved the utilization of calcium in rice: Chelating and absorption mechanism. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 237:113502. [PMID: 35447470 DOI: 10.1016/j.ecoenv.2022.113502] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
Water-soluble chelated calcium has been widely used in agriculture as a fertilizer to improve the absorption and utilization of calcium by plants. This paper prepared a new organic mineral fertilizer, based on fulvic acid-like substance chelated calcium (PFA-Ca2+ complex), using optimal parameters (i.e., pH, time, temperature, and Ca2+ concentration) to achieve a high chelation efficiency. The absorption, utilization, and distribution of the PFA-Ca2+ complex in rice roots were analyzed using laser scanning confocal microscopy (LSCM). Our results demonstrated that the optimal PFA-Ca2+ complex chelating efficiency (87%) was achieved at an initial Ca2+ concentration of 0.1 mol L-1, an equilibration time of 120 min, a pH of 5.0, and a temperature of 40 °C. The chelating reaction of a fulvic acid-like substance with Ca2+ primarily occurred on phenol hydroxyl, alcohol hydroxyl, and carboxyl groups. The PFA-Ca2+ complex was primarily enriched in the roots' pericycle, cortical, and epidermis cells, in both chelating and non-chelating forms. To our knowledge, this is the first report investigating how the PFA-Ca2+complex affects transformation in plants, which has significant implications for research on plant nutrition and nutrient distribution.
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Affiliation(s)
- Zhonghua Wang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources; National Engineering & Technology Research Center for Slow and Controlled-Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Daizong Road No. 61, Taian, Shandong 271018, China
| | - Yuanyuan Yao
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources; National Engineering & Technology Research Center for Slow and Controlled-Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Daizong Road No. 61, Taian, Shandong 271018, China
| | - Yuechao Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources; National Engineering & Technology Research Center for Slow and Controlled-Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Daizong Road No. 61, Taian, Shandong 271018, China; Department of Soil and Water Science, Tropical Research and Education Center, University of Florida, Homestead, FL 33031, United States.
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7
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Chai YN, Schachtman DP. Root exudates impact plant performance under abiotic stress. TRENDS IN PLANT SCIENCE 2022; 27:80-91. [PMID: 34481715 DOI: 10.1016/j.tplants.2021.08.003] [Citation(s) in RCA: 101] [Impact Index Per Article: 50.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 08/01/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Plant root exudates serve pivotal roles in supporting plant development and interactions with the physicochemical and biological factors in the rhizosphere. Under stress conditions, root exudation is involved in enhancing plant resource-use efficiency and facilitating the crosstalk between plant and soil microbes to ameliorate stress. Although there are a large number of root exudates that remain to be characterized, recent technological advancements have allowed for the function of many exudate compounds to be elucidated. In this review, we discuss current knowledge about the key root exudates that modulate plant resource-use efficiency under various abiotic stresses including drought, aluminum toxicity, phosphorus, nitrogen, and iron deficiency. The role that key root exudates play in shaping microbial communities in the rhizosphere under stress conditions is also an important consideration addressed in this review.
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Affiliation(s)
- Yen Ning Chai
- Department of Agronomy and Horticulture, University of Nebraska - Lincoln, Lincoln, NE 68588, USA; Center for Plant Science Innovation, University of Nebraska - Lincoln, Lincoln, NE 68588, USA
| | - Daniel P Schachtman
- Department of Agronomy and Horticulture, University of Nebraska - Lincoln, Lincoln, NE 68588, USA; Center for Plant Science Innovation, University of Nebraska - Lincoln, Lincoln, NE 68588, USA.
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8
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Marriboina S, Sharma K, Sengupta D, Yadavalli AD, Sharma RP, Reddy Attipalli R. Evaluation of high salinity tolerance in Pongamia pinnata (L.) Pierre by a systematic analysis of hormone-metabolic network. PHYSIOLOGIA PLANTARUM 2021; 173:1514-1534. [PMID: 34165187 DOI: 10.1111/ppl.13486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
Salinity stress results in significant losses in plant productivity and loss of cultivable lands. Although Pongamia pinnata is reported to be a salt-tolerant semiarid biofuel tree, the adaptive mechanisms to saline environments are elusive. Despite a reduction in carbon exchange rate (CER), the unchanged relative water content provides no visible salinity induced symptoms in leaves of hydroponic cultivated Pongamia seedlings for 8 days. Our Na+ -specific fluorescence results demonstrated that there was an effective apoplastic sodium sequestration in the roots. Salinity stress significantly increased zeatin (~5.5-fold), and jasmonic acid (~3.8-fold) levels in leaves while zeatin (~2.5-fold) content increased in leaves as well as in roots of salt-treated plants. Metabolite analysis suggested that osmolytes such as myo-inositol and mannitol were enhanced by ~12-fold in leaves and roots of salt-treated plants. Additionally, leaves of Pongamia showed a significant enhancement in carbohydrate content, while fatty acids were accumulated in roots under salt stress condition. At the molecular level, salt stress enhanced the expression of genes related to transporters, including the Salt Overly Sensitive 2 gene (SOS2), SOS3, vacuolar-cation/proton exchanger, and vacuolar-proton/ATPase exclusively in leaves, whereas the Sodium Proton Exchanger1 (NHX1), Cation Calcium Exchanger (CCX), and Cyclic Nucleotide Gated Channel 5 (CNGC5) were up-regulated in roots. Antioxidant gene expression analysis clearly demonstrated that peroxidase levels were significantly enhanced by ~10-fold in leaves, while Catalase and Fe-superoxide Dismutase (Fe-SOD) genes were increased in roots under salt stress. The correlation interaction studies between phytohormones and metabolites revealed new insights into the molecular and metabolic adaptations that confer salinity tolerance to Pongamia.
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Affiliation(s)
- Sureshbabu Marriboina
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Kapil Sharma
- Repository of Tomato Genomics Resources, Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Debashree Sengupta
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Anurupa Devi Yadavalli
- Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Rameshwar Prasad Sharma
- Repository of Tomato Genomics Resources, Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
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9
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Zhang Y, Xu F, Ding Y, Du H, Zhang Q, Dang X, Cao Y, Dodd IC, Xu W. Abscisic acid mediates barley rhizosheath formation under mild soil drying by promoting root hair growth and auxin response. PLANT, CELL & ENVIRONMENT 2021; 44:1935-1945. [PMID: 33629760 DOI: 10.1111/pce.14036] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 05/22/2023]
Abstract
Soil drying enhances root ABA accumulation and rhizosheath formation, but whether ABA mediates rhizosheath formation is unclear. Here, we used the ABA-deficient mutant Az34 to investigate molecular and morphological changes by which ABA could affect rhizosheath formation. Mild soil drying with intermittent watering increased rhizosheath formation by promoting root and root hair elongation. Attenuated root ABA accumulation in Az34 barley constrained the promotion of root length and root hair length by drying soil, such that Az34 had a smaller rhizosheath. Pharmacological experiments of adding fluridone (an ABA biosynthesis inhibitor) and ABA to drying soil restricted and enhanced rhizosheath formation respectively in Az34 and wild-type Steptoe barley. RNA sequencing suggested that ABA accumulation mediates auxin synthesis and responses and root and root hair elongation in drying soil. In addition, adding indole-3-acetic acid (IAA) to drying soil increased rhizosheath formation by promoting root and root hair elongation in Steptoe and Az34 barley. Together, these results show that ABA accumulation induced by mild soil drying enhance barley rhizosheath formation, which may be achieved through promoting auxin response.
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Affiliation(s)
- Yingjiao Zhang
- Institute of Oceanography, Minjiang University, Fuzhou, China
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Feiyun Xu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
- College of Agriculture, Yangzhou University, Yangzhou, China
| | - Yexin Ding
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Huan Du
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Qian Zhang
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaolin Dang
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yiying Cao
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ian C Dodd
- The Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - Weifeng Xu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
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10
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Auler PA, Nogueira do Amaral M, Rossatto T, Lopez Crizel R, Milech C, Clasen Chaves F, Maia Souza G, Bolacel Braga EJ. Metabolism of abscisic acid in two contrasting rice genotypes submitted to recurrent water deficit. PHYSIOLOGIA PLANTARUM 2021; 172:304-316. [PMID: 32421869 DOI: 10.1111/ppl.13126] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/08/2020] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
Drought is the main constrain for crops worldwide, however, the effects of recurrent water deficit remain still hidden. We analysed two rice genotypes, 'BRS-Querência' (lowlands) and 'AN-Cambará' (uplands), after 7 days of recurrent drought followed by 24 h of rehydration, hypothesising that genotypes grown in regions with different water availabilities respond differently to water deficits, and that a previous exposure to stress could alter abscisic acid (ABA) metabolism. The results showed that both genotypes reduced stomatal conductance and increased ABA concentration. After rehydration, the ABA levels decreased, mainly in the plants of BRS-Querência subjected to recurrent stress. However, the levels of ABA were higher in plants in recurrent water deficit compared to non-recurrent stress plants in both genotypes. Remarkably in the lowland genotype, the ABA glucosyl-ester (ABA-GE) concentration increased after recovery in the plants under recurrent stress. Regarding of gene expression, the genes associated in ABA biosynthesis with the highest expression levels were NCED2, NCED3, NCED4 and AAO2. However, 'AN-Cambará' showed less transcriptional activation. Taking into account the genes involved in ABA catabolism, ABAH1 appears to play an important role related to the recurrent stress in upland plants. These results indicate that one of the factors that can promote greater tolerance for the upland genotype is the tradeoff between ABA and ABA-GE when plants are subjected to water deficits. In addition, they indicate that abscisic acid metabolism is altered due to the genotype (upland or lowland) and pre-exposure to stress can also modify adaptive responses in rice varieties (recurrent stress).
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Affiliation(s)
- Priscila Ariane Auler
- Department of Botany, Biology Institute, Plant Physiology, Federal University of Pelotas, Pelotas, Brazil
| | - Marcelo Nogueira do Amaral
- Department of Botany, Biology Institute, Plant Physiology, Federal University of Pelotas, Pelotas, Brazil
| | - Tatiana Rossatto
- Department of Botany, Biology Institute, Plant Physiology, Federal University of Pelotas, Pelotas, Brazil
| | - Rosane Lopez Crizel
- Department of Agroindustrial Science and Technology - Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Cristini Milech
- Department of Botany, Biology Institute, Plant Physiology, Federal University of Pelotas, Pelotas, Brazil
| | - Fabio Clasen Chaves
- Department of Agroindustrial Science and Technology - Agronomy, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Gustavo Maia Souza
- Department of Botany, Biology Institute, Plant Physiology, Federal University of Pelotas, Pelotas, Brazil
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Liang C, Liu H. Response of hormone in rice seedlings to irrigation contaminated with cyanobacterial extract containing microcystins. CHEMOSPHERE 2020; 256:127157. [PMID: 32470740 DOI: 10.1016/j.chemosphere.2020.127157] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/10/2020] [Accepted: 05/20/2020] [Indexed: 06/11/2023]
Abstract
Microcystins released by cyanobacteria affect crop growth and productivity, and even food safety. Plant hormones play a vital role in regulating growth, development and stress response in plants. Therefore, we studied the response of hormones including abscisic acid (ABA), indole-3-acetic acid (IAA), Zeatin (ZT) and gibberellin (GA3) as well as hormone balances (IAA/ABA, ZT/ABA and GA/ABA) to cyanobacterial extract containing microcystins (1, 10, 100 and 1000 μg/L) during stress and recovery periods. Low concentration microcystins (1 μg/L) promoted growth of rice seedlings by increasing levels of IAA, ZT and GA3 and maintaining hormone balances. In addition, the up-regulation of OsYUCCA1 increased IAA level in rice roots by promoting IAA biosynthesis. High concentrations microcystins (10, 100 or1000 μg/L) inhibited growth of rice seedlings by reducing levels of IAA, ZT and GA3 and ratios of IAA/ABA, ZT/ABA and GA/ABA due to increased ABA level. The increase in ABA in rice seedlings induced by high concentrations MCs was resulted from up-regulation of OsNCED1, OsNCED3, OsNCED4 and OsZEP to enhance ABA biosynthesis, and was controlled by up-regulating expression levels of OsABAox1-3 for enhancing ABA catabolism as negative feedback. The highest concentration of MCs (1000 μg/L) caused irreversible damage to metabolisms of IAA and ABA, partly resulting in unrecoverable inhibition on rice growth. All results demonstrate that "low-concentration promotion and high-concentration inhibition" of microcystins was associated with changes in hormone levels and balances by affecting their metabolisms, and could be helpful for guiding agricultural irrigation with microcystin contaminated water.
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Affiliation(s)
- Chanjuan Liang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China; Jiangsu Cooperative Innovation Center of Technology and Material of Water Treatment, Jiangnan University, Wuxi, 214122, China.
| | - Hongyue Liu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China
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12
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Zhang Y, Du H, Gui Y, Xu F, Liu J, Zhang J, Xu W. Moderate water stress in rice induces rhizosheath formation associated with abscisic acid and auxin responses. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:2740-2751. [PMID: 32053723 PMCID: PMC7210750 DOI: 10.1093/jxb/eraa021] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 01/12/2020] [Indexed: 05/21/2023]
Abstract
The rhizosheath is known to be beneficial for drought resistance in many plants, but the regulation of rhizosheath formation in rice plants is unclear. Here, we investigate rhizosheath formation in different rice varieties and root hair mutants. Our results showed that moderate water stress in rice induced rhizosheath formation. The soil porosity and water content were higher in the rice rhizosheath than in the rice bulk soil under moderate water stress. Additionally, rhizosheath formation in short root hair mutants was lower than in wild-type rice under moderate water stress. Moreover, transcriptomic results indicated that abscisic acid (ABA) and auxin were involved in root and root hair responses in rhizosheath formation. Further, blocking ABA and auxin pathways in wild type and in rhl1-1, the shortest root hair mutant, rhizosheath formation and root hair length were significantly decreased under moderate water stress. However, wild type plants maintained a higher root ABA content, root basipetal auxin transport, root hair length, and amount of rhizosheath than did rhl1-1. Our results suggest that moderate water stress in rice induces rhizosheath formation by modulating the ABA and auxin responses to regulate root and root hair growth, which may be used to breed rice varieties resistant to drought.
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Affiliation(s)
- Yingjiao Zhang
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Oceanography, Minjiang University, Fuzhou, China
| | - Huan Du
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yao Gui
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Feiyun Xu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jianping Liu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, State Key Laboratory of Agrobiotechnology in the Chinese University of Hong Kong, Hong Kong, China
| | - Weifeng Xu
- Center for Plant Water-use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop, Fujian Agriculture and Forestry University, Fuzhou, China
- Correspondence:
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Cao X, Wu L, Wu M, Zhu C, Jin Q, Zhang J. Abscisic acid mediated proline biosynthesis and antioxidant ability in roots of two different rice genotypes under hypoxic stress. BMC PLANT BIOLOGY 2020; 20:198. [PMID: 32384870 PMCID: PMC7206686 DOI: 10.1186/s12870-020-02414-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 04/29/2020] [Indexed: 05/19/2023]
Abstract
BACKGROUND Abscisic acid (ABA) and proline play important roles in rice acclimation to different stress conditions. To study whether cross-talk exists between ABA and proline, their roles in rice acclimation to hypoxia, rice growth, root oxidative damage and endogenous ABA and proline accumulation were investigated in two different rice genotypes ('Nipponbare' (Nip) and 'Upland 502' (U502)). RESULTS Compared with U502 seedlings, Nip seedlings were highly tolerant to hypoxic stress, with increased plant biomass and leaf photosynthesis and decreased root oxidative damage. Hypoxia significantly stimulated the accumulation of proline and ABA in the roots of both cultivars, with a higher ABA level observed in Nip than in U502, whereas the proline levels showed no significant difference in the two cultivars. The time course variation showed that the root ABA and proline contents under hypoxia increased 1.5- and 1.2-fold in Nip, and 2.2- and 0.7-fold in U502, respectively, within the 1 d of hypoxic stress, but peak ABA production (1 d) occurred before proline accumulation (5 d) in both cultivars. Treatment with an ABA synthesis inhibitor (norflurazon, Norf) inhibited proline synthesis and simultaneously aggravated hypoxia-induced oxidative damage in the roots of both cultivars, but these effects were reversed by exogenous ABA application. Hypoxia plus Norf treatment also induced an increase in glutamate (the main precursor of proline). This indicates that proline accumulation is regulated by ABA-dependent signals under hypoxic stress. Moreover, genes involved in proline metabolism were differentially expressed between the two genotypes, with expression mediated by ABA under hypoxic stress. In Nip, hypoxia-induced proline accumulation in roots was attributed to the upregulation of OsP5CS2 and downregulation of OsProDH, whereas upregulation of OsP5CS1 combined with downregulation of OsProDH enhanced the proline level in U502. CONCLUSION These results suggest that the high tolerance of the Nip cultivar is related to the high ABA level and ABA-mediated antioxidant capacity in roots. ABA acts upstream of proline accumulation by regulating the expression of genes encoding the key enzymes in proline biosynthesis, which also partly improves rice acclimation to hypoxic stress. However, other signaling pathways enhancing tolerance to hypoxia in the Nip cultivar still need to be elucidated.
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Affiliation(s)
- Xiaochuang Cao
- State Key Laboratory of Rice Biology, China National Rice Research Institute, No. 359 Tiyuchang Road, Hangzhou, 310006 People’s Republic of China
| | - Longlong Wu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, No. 359 Tiyuchang Road, Hangzhou, 310006 People’s Republic of China
| | - Meiyan Wu
- Hubei Collaborative Innovation Center for Grain Industry/Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Yangtze University, Jingzhou, 434025 Hubei China
| | - Chunquan Zhu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, No. 359 Tiyuchang Road, Hangzhou, 310006 People’s Republic of China
| | - Qianyu Jin
- State Key Laboratory of Rice Biology, China National Rice Research Institute, No. 359 Tiyuchang Road, Hangzhou, 310006 People’s Republic of China
| | - Junhua Zhang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, No. 359 Tiyuchang Road, Hangzhou, 310006 People’s Republic of China
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Zhang Y, Wang X, Xu F, Song T, Du H, Gui Y, Xu M, Cao Y, Dang X, Rensing C, Zhang J, Xu W. Combining Irrigation Scheme and Phosphorous Application Levels for Grain Yield and Their Impacts on Rhizosphere Microbial Communities of Two Rice Varieties in a Field Trial. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:10577-10586. [PMID: 31490682 DOI: 10.1021/acs.jafc.9b03124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Root and rhizosphere is important for phosphorus (P) uptake in rice plants. However, little is known about the detailed regulation of irrigation regimes, especially frequently alternate wetting and drying (FAWD), on P usage of rice plants. Here, we found that compared with normal water and P dose, FAWD with a reduced P dose maintained the grain yield in two rice varieties. Compared to rice variety Gaoshan1, rice variety WufengyouT025 displayed a higher grain yield, shoot P content, rhizosphere acid phosphatase activity, abundance of bacteria, and bacterial acid phosphatase gene of rhizosphere. Moreover, the FAWD regime may increase the abundance of bacteria with acid phosphatase activity to release available phosphorus in the rhizosphere, which is associated with rice varieties. Our results suggest that an optimized management of irrigation and phosphorous application can enhance both water and phosphorus use efficiency without sacrificing the yield, which may contribute significantly to sustainable agriculture production.
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Affiliation(s)
- Yingjiao Zhang
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Xiaoyun Wang
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Feiyun Xu
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Tao Song
- School of Life Sciences and State Key Laboratory of Agrobiotechnology , The Chinese University of Hong Kong , Shatin , Hong Kong 999077 , China
| | - Huan Du
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Yao Gui
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Min Xu
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Yiying Cao
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Xiaolin Dang
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Christopher Rensing
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
| | - Jianhua Zhang
- School of Life Sciences and State Key Laboratory of Agrobiotechnology , The Chinese University of Hong Kong , Shatin , Hong Kong 999077 , China
| | - Weifeng Xu
- Center for Plant Water-Use and Nutrition Regulation and College of Life Sciences, Joint International Research Laboratory of Water and Nutrient in Crop , Fujian Agriculture and Forestry University , Jinshan, Fuzhou 350002 , China
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15
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Guo T, Wang N, Xue Y, Guan Q, van Nocker S, Liu C, Ma F. Overexpression of the RNA binding protein MhYTP1 in transgenic apple enhances drought tolerance and WUE by improving ABA level under drought condition. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 280:397-407. [PMID: 30824018 DOI: 10.1016/j.plantsci.2018.11.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 11/05/2018] [Accepted: 11/26/2018] [Indexed: 05/08/2023]
Abstract
MhYTP1 is involved in post-transcriptional regulation as a member of YT521-homology (YTH) domain-containing RNA-binding proteins. We previously cloned MhYTP1 and found it participated in various biotic and abiotic stress responses. However, its function in long-term moderate drought has not been verified. Thus, we explored its biological role in response to drought. Under drought condition, the net photosynthesis rate (Pn) and water use efficiency (WUE) were significantly elevated in MhYTP1-overexpressing (OE) apple plants when compared with the non-transgenic (NT) controls. Further analysis indicated MhYTP1 expression was associated with elevated ABA content, increased stomatal density and reduced stomatal aperture. In addition, to gain insight into the function of stem-specific expression of MhYTP1, grafting experiments were performed. Interestingly, lower transpiration rate (Tr) and higher WUE were observed when transgenic plants were used as scions as opposed to rootstocks and when transgenic rather than NT plants were used as rootstocks, indicating MhYTP1 plays crucial roles in grafted plants. These results define a function for MhYTP1 in promoting tolerance to drought conditions, and suggest that MhYTP1 can serve as a candidate gene for future apple drought resistance breeding with the help of biotechnology.
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Affiliation(s)
- Tianli Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Na Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yangchun Xue
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qingmei Guan
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Steven van Nocker
- Department of Horticulture, Michigan State University, East Lansing, MI, USA
| | - Changhai Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China.
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16
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Hwang SG, Lee CY, Tseng CS. Heterologous expression of rice 9-cis-epoxycarotenoid dioxygenase 4 (OsNCED4) in Arabidopsis confers sugar oversensitivity and drought tolerance. BOTANICAL STUDIES 2018; 59:2. [PMID: 29335785 PMCID: PMC5768580 DOI: 10.1186/s40529-018-0219-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/10/2018] [Indexed: 05/11/2023]
Abstract
BACKGROUND The 9-cis-epoxycarotenoid dioxygenases OsNCED4 was cloned from rice in conjunction with OsNCED 1-3 and 5, of which 3 has been shown to function in ABA biosynthesis and alteration of leaf morphology. In higher plants, NCEDs have been shown to be key enzymes controlling ABA biosynthesis and belong to a differentially expressed gene family. Aside from OsNCED3, it remains largely unknown if other OsNCED genes are involved in ABA biosynthesis in rice. Thus, transgenic Arabidopsis plants overexpressing OsNCED4 were generated in the 129B08/nced3 mutant background to explore OsNCED4 function in ABA biosynthesis. RESULTS Heterologous expression of OsNCED4 in Arabidopsis increased ABA levels and altered plant size and leaf shape, delayed seed germination, caused sugar oversensitivity in post-germination growth, and enhanced tolerance to drought. The native OsNCED3 and OsNCED4 promoters were expressed in an overlapping pattern in rice seeds and young seedlings, suggesting possible functional redundancy between OsNCED3 and OsNCED4. At the one-leaf stage, similar regulation of OsNCED3 and OsNCED4 gene expression in roots or leaves in response to moderate salt stress (150 mM NaCl) was observed. CONCLUSION Like OsNCED3, OsNCED4 is functionally active in ABA biosynthesis in rice. OsNCED3 and OsNCED4 might play redundant roles in controlling ABA biosynthesis in rice, as suggested by GUS staining assay, but this should be further analyzed through complementation of rice NCED knockout mutants.
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Affiliation(s)
- San-Gwang Hwang
- Department of Horticulture, National Chung Hsing University, 145 Xingda Road, South District, Taichung, 40227 Taiwan, ROC
| | - Chia-Yun Lee
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529 Taiwan, ROC
| | - Ching-Shan Tseng
- Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan, No.189, Zhongzheng Road, Wufeng District, Taichung, 41362 Taiwan, ROC
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17
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Huang Y, Guo Y, Liu Y, Zhang F, Wang Z, Wang H, Wang F, Li D, Mao D, Luan S, Liang M, Chen L. 9- cis-Epoxycarotenoid Dioxygenase 3 Regulates Plant Growth and Enhances Multi-Abiotic Stress Tolerance in Rice. FRONTIERS IN PLANT SCIENCE 2018; 9:162. [PMID: 29559982 PMCID: PMC5845534 DOI: 10.3389/fpls.2018.00162] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/29/2018] [Indexed: 05/20/2023]
Abstract
Although abscisic acid (ABA) is an important hormone that regulates seed dormancy, stomatal closure, plant development, as well as responses to environmental stimuli, the physiological mechanisms of ABA response to multiple stress in rice remain poorly understood. In the ABA biosynthetic pathway, 9-cis-epoxycarotenoid dioxygenase (NCED) is the key rate-limiting enzyme. Here, we report important functions of OsNCED3 in multi-abiotic stress tolerance in rice. The OsNCED3 is constitutively expressed in various tissues under normal condition, Its expression is highly induced by NaCl, PEG, and H2O2 stress, suggesting the roles for OsNCED3 in response to the multi-abiotic stress tolerance in rice. Compared with wild-type plants, nced3 mutants had earlier seed germination, longer post-germination seedling growth, increased sensitivity to water stress and H2O2 stress and increased stomata aperture under water stress and delayed leaf senescence. Further analysis found that nced3 mutants contained lower ABA content compared with wild-type plants, overexpression of OsNCED3 in transgenic plants could enhance water stress tolerance, promote leaf senescence and increase ABA content. We conclude that OsNCED3 mediates seed dormancy, plant growth, abiotic stress tolerance, and leaf senescence by regulating ABA biosynthesis in rice; and may provide a new strategy for improving the quality of crop.
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18
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Debieu M, Kanfany G, Laplaze L. Pearl Millet Genome: Lessons from a Tough Crop. TRENDS IN PLANT SCIENCE 2017; 22:911-913. [PMID: 28939172 DOI: 10.1016/j.tplants.2017.09.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
Pearl millet is an important cereal for food security in the arid regions of Africa and India. The recently published genome of this tough cereal crop has shed new light on its history and adaptation to dry, hot climates and paves the way for much-needed genomic-based breeding efforts.
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Affiliation(s)
- Marilyne Debieu
- Institut de Recherche pour le Développement, UMR Diversité Adaptation et Développement des Plantes (DIADE), 911 Avenue Agropolis, 34394 Montpellier cedex 5, France; Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés aux Stress Environnementaux (LAPSE), Centre de Recherche de Bel Air, BP 1386, Dakar, Senegal
| | - Ghislain Kanfany
- Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés aux Stress Environnementaux (LAPSE), Centre de Recherche de Bel Air, BP 1386, Dakar, Senegal; Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sècheresse (CERAAS), Institut Sénégalais de Recherches Agricoles, BP 3320, Route de Khombole, Thiès, Senegal
| | - Laurent Laplaze
- Institut de Recherche pour le Développement, UMR Diversité Adaptation et Développement des Plantes (DIADE), 911 Avenue Agropolis, 34394 Montpellier cedex 5, France; Laboratoire Mixte International Adaptation des Plantes et Microorganismes Associés aux Stress Environnementaux (LAPSE), Centre de Recherche de Bel Air, BP 1386, Dakar, Senegal; Laboratoire Commun de Microbiologie IRD/ISRA/UCAD, Centre de Recherche de Bel Air, BP 1386, Dakar, Senegal.
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Kang J, Li J, Gao S, Tian C, Zha X. Overexpression of the leucine-rich receptor-like kinase gene LRK2 increases drought tolerance and tiller number in rice. PLANT BIOTECHNOLOGY JOURNAL 2017; 15:1175-1185. [PMID: 28182328 PMCID: PMC5552483 DOI: 10.1111/pbi.12707] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 01/29/2017] [Accepted: 01/30/2017] [Indexed: 05/18/2023]
Abstract
Drought represents a key limiting factor of global crop distribution. Receptor-like kinases play major roles in plant development and defence responses against stresses such as drought. In this study, LRK2, which encodes a leucine-rich receptor-like kinase, was cloned and characterized and found to be localized on the plasma membrane in rice. Promoter-GUS analysis revealed strong expression in tiller buds, roots, nodes and anthers. Transgenic plants overexpressing LRK2 exhibited enhanced tolerance to drought stress due to an increased number of lateral roots compared with the wild type at the vegetative stage. Moreover, ectopic expression of LRK2 seedlings resulted in increased tiller development. Yeast two-hybrid screening and bimolecular fluorescence complementation (BiFC) indicated a possible interaction between LRK2 and elongation factor 1 alpha (OsEF1A) in vitro. These results suggest that LRK2 functions as a positive regulator of the drought stress response and tiller development via increased branch development in rice. These findings will aid our understanding of branch regulation in other grasses and support improvements in rice genetics.
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Affiliation(s)
- Junfang Kang
- College of Chemistry and Life SciencesZhejiang Normal UniversityJinhuaChina
| | - Jianmin Li
- College of Chemistry and Life SciencesZhejiang Normal UniversityJinhuaChina
| | - Shuang Gao
- College of Chemistry and Life SciencesZhejiang Normal UniversityJinhuaChina
| | - Chao Tian
- College of Chemistry and Life SciencesZhejiang Normal UniversityJinhuaChina
| | - Xiaojun Zha
- College of Chemistry and Life SciencesZhejiang Normal UniversityJinhuaChina
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20
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Bin Rahman ANMR, Zhang J. Flood and drought tolerance in rice: opposite but may coexist. Food Energy Secur 2016. [DOI: 10.1002/fes3.79] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- A. N. M. Rubaiyath Bin Rahman
- School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Hong Kong China
| | - Jianhua Zhang
- School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Hong Kong China
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Janiak A, Kwaśniewski M, Szarejko I. Gene expression regulation in roots under drought. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:1003-14. [PMID: 26663562 DOI: 10.1093/jxb/erv512] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Stress signalling and regulatory networks controlling expression of target genes are the basis of plant response to drought. Roots are the first organs exposed to water deficiency in the soil and are the place of drought sensing. Signalling cascades transfer chemical signals toward the shoot and initiate molecular responses that lead to the biochemical and morphological changes that allow plants to be protected against water loss and to tolerate stress conditions. Here, we present an overview of signalling network and gene expression regulation pathways that are actively induced in roots under drought stress. In particular, the role of several transcription factor (TF) families, including DREB, AP2/ERF, NAC, bZIP, MYC, CAMTA, Alfin-like and Q-type ZFP, in the regulation of root response to drought are highlighted. The information provided includes available data on mutual interactions between these TFs together with their regulation by plant hormones and other signalling molecules. The most significant downstream target genes and molecular processes that are controlled by the regulatory factors are given. These data are also coupled with information about the influence of the described regulatory networks on root traits and root development which may translate to enhanced drought tolerance. This is the first literature survey demonstrating the gene expression regulatory machinery that is induced by drought stress, presented from the perspective of roots.
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Affiliation(s)
- Agnieszka Janiak
- Department of Genetics, University of Silesia, Jagiellońska 28, 40-032 Katowice, Poland
| | - Mirosław Kwaśniewski
- Department of Genetics, University of Silesia, Jagiellońska 28, 40-032 Katowice, Poland
| | - Iwona Szarejko
- Department of Genetics, University of Silesia, Jagiellońska 28, 40-032 Katowice, Poland
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Abscisic Acid: Hidden Architect of Root System Structure. PLANTS 2015; 4:548-72. [PMID: 27135341 PMCID: PMC4844405 DOI: 10.3390/plants4030548] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 08/01/2015] [Accepted: 08/03/2015] [Indexed: 01/15/2023]
Abstract
Plants modulate root growth in response to changes in the local environment, guided by intrinsic developmental genetic programs. The hormone Abscisic Acid (ABA) mediates responses to different environmental factors, such as the presence of nitrate in the soil, water stress and salt, shaping the structure of the root system by regulating the production of lateral roots as well as controlling root elongation by modulating cell division and elongation. Curiously, ABA controls different aspects of root architecture in different plant species, perhaps providing some insight into the great diversity of root architecture in different plants, both from different taxa and from different environments. ABA is an ancient signaling pathway, acquired well before the diversification of land plants. Nonetheless, how this ancient signaling module is implemented or interacts within a larger signaling network appears to vary in different species. This review will examine the role of ABA in the control of root architecture, focusing on the regulation of lateral root formation in three plant species, Arabidopsis thaliana, Medicago truncatula and Oryza sativa. We will consider how the implementation of the ABA signaling module might be a target of natural selection, to help contribute to the diversity of root architecture in nature.
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