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Huang G, Yin X, Lu J, Zhang L, Lin D, Xie Y, Liu H, Liu C, Zuo J, Zhang X. Dynamic QTL mapping revealed primarily the genetic structure of photosynthetic traits in castor (Ricinus communis L.). Sci Rep 2023; 13:14071. [PMID: 37640794 PMCID: PMC10462610 DOI: 10.1038/s41598-023-41241-y] [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: 04/21/2023] [Accepted: 08/23/2023] [Indexed: 08/31/2023] Open
Abstract
High photosynthetic efficiency is the basis of high biomass and high harvest index in castor (Ricinus communis L.). Understanding the genetic law of photosynthetic traits will facilitate the breeding for high photosynthetic efficiency. In this study, the dynamic QTL mapping was performed with the populations F2 and BC1 derived from 2 parents with significant difference in net photosynthetic rate (Pn) at 3 stages, in order to reveal the genetic structure of photosynthetic traits. In F2 population, 26 single-locus QTLs were identified, including 3/3/1 (the QTL number at stage I/II/III, the same below), 1/2/0, 1/2/2, 1/3/1, 0/1/1, and 1/1/2 QTLs conferring Pn, water use efficiency (Wue), transpiration rate (Tr), stomatal conductance (Gs), intercellular CO2 concentration (Ci) and chlorophyll content (Cc), with a phenotypic variation explained (PVE) of 8.40%/8.91%/6.17%, 5.36%/31.74%/0, 7.31%/12.80%/15.15%, 1.60%/6.44%/0.02%, 0/1.10%/0.70% and 2.77%/3.96%/6.50% respectively. And 53 epistatic QTLs (31 pairs) were identified, including 2/2/5, 5/6/3, 4/4/2, 6/3/2, 3/2/0 and 4/0/0 ones conferring the above 6 traits, with a PVE of 6.52%/6.47%/19.04%, 16.72%/15.67%/14.12%, 18.57%/15.58%/7.34%, 21.72%/8.52%/7.13%, 13.33%/4.94%/0 and 7.84%/0/0 respectively. The QTL mapping results in BC1 population were consistent with those in F2 population, except fewer QTLs detected. Most QTLs identified were minor-effect ones, only a few were main-effect ones (PVE > 10%), focused on 2 traits, Wue and Tr, such as qWue1.1, qWue1.2, FqTr1.1, FqTr6, BqWue1.1 and BqTr3; The epistatic effects, especially those related to the dominance effects were the main genetic component of photosynthetic traits, and all the epistatic QTLs had no single-locus effects except qPn1.2, FqGs1.2, FqCi1.2 and qCc3.2; The detected QTLs underlying each trait varied at different stages except stable QTLs qGs1.1, detected at 3 stages, qWue2, qTr1.2 and qCc3.2, detected at 2 stages; 6 co-located QTLs were identified, each of which conferring 2-5 different traits, demonstrated the gene pleiotropy between photosynthetic traits; 2 QTL clusters, located within the marker intervals RCM1842-RCM1335 and RCM523-RCM83, contained 15/5 (F2/BC1) and 4/4 (F2/BC1) QTLs conferring multiple traits, including co-located QTLs and main-effect QTLs. The above results provided new insights into the genetic structure of photosynthetic traits and important references for the high photosynthetic efficiency breeding in castor plant.
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Affiliation(s)
- Guanrong Huang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Xuegui Yin
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Jiannong Lu
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China.
| | - Liuqin Zhang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Dantong Lin
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Yu Xie
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Haiyan Liu
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Chaoyu Liu
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Jinying Zuo
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Xiaoxiao Zhang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
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Petrík P, Petek-Petrik A, Mukarram M, Schuldt B, Lamarque LJ. Leaf physiological and morphological constraints of water-use efficiency in C 3 plants. AOB PLANTS 2023; 15:plad047. [PMID: 37560762 PMCID: PMC10407996 DOI: 10.1093/aobpla/plad047] [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: 12/26/2022] [Accepted: 07/05/2023] [Indexed: 08/11/2023]
Abstract
The increasing evaporative demand due to climate change will significantly affect the balance of carbon assimilation and water losses of plants worldwide. The development of crop varieties with improved water-use efficiency (WUE) will be critical for adapting agricultural strategies under predicted future climates. This review aims to summarize the most important leaf morpho-physiological constraints of WUE in C3 plants and identify gaps in knowledge. From the carbon gain side of the WUE, the discussed parameters are mesophyll conductance, carboxylation efficiency and respiratory losses. The traits and parameters affecting the waterside of WUE balance discussed in this review are stomatal size and density, stomatal control and residual water losses (cuticular and bark conductance), nocturnal conductance and leaf hydraulic conductance. In addition, we discussed the impact of leaf anatomy and crown architecture on both the carbon gain and water loss components of WUE. There are multiple possible targets for future development in understanding sources of WUE variability in plants. We identified residual water losses and respiratory carbon losses as the greatest knowledge gaps of whole-plant WUE assessments. Moreover, the impact of trichomes, leaf hydraulic conductance and canopy structure on plants' WUE is still not well understood. The development of a multi-trait approach is urgently needed for a better understanding of WUE dynamics and optimization.
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Affiliation(s)
- Peter Petrík
- Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research-Atmospheric Environmental Research (IMK-IFU), Kreuzeckbahnstraße 19, 82467 Garmisch-Partenkirchen, Germany
| | - Anja Petek-Petrik
- Institute of Botany, Czech Academy of Sciences, Lidická 971, 602 00 Brno, Czech Republic
| | - Mohammad Mukarram
- Department of Phytology, Faculty of Forestry, Technical University in Zvolen, T.G. Masaryka 24, 960 01 Zvolen, Slovakia
| | - Bernhard Schuldt
- Chair of Forest Botany, Institute of Forest Botany and Forest Zoology, Technical University of Dresden (TUD), Pienner Str. 7, 01737 Tharandt, Germany
| | - Laurent J Lamarque
- Département des Sciences de l’environnement, Université du Québec à Trois-Rivières, Trois-Rivières, QC G8Z 4M3, Canada
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3
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Roeder J, Liu J, Doch I, Ruschhaupt M, Christmann A, Grill E, Helmke H, Hohmann S, Lehr S, Frackenpohl J, Yang Z. Abscisic acid agonists suitable for optimizing plant water use. FRONTIERS IN PLANT SCIENCE 2023; 13:1071710. [PMID: 36743550 PMCID: PMC9894685 DOI: 10.3389/fpls.2022.1071710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 12/28/2022] [Indexed: 06/18/2023]
Abstract
Climate change and overexploitation of groundwater resources cause constraints on water demand for agriculture, thus threatening crop productivity. For future food security, there is an urgent need for crops of high water use efficiency combined with high crop productivity, i.e. having high water productivity. High water productivity means efficient biomass accumulation at reduced transpiration. Recent studies show that plants are able to optimize carbon uptake per water transpired with little or no trade-off in yield. The phytohormone abscisic acid (ABA) plays a pivotal role in minimizing leaf transpiration and mediating enhanced water productivity. Hence, ABA and more chemically stable ABA agonists have the potential to improve crop water productivity. Synthesis, screening, and identification of suitable ABA agonists are major efforts currently undertaken. In this study, we used yeast expressing the plant ABA signal pathway to prescreen ABA-related cyano cyclopropyl compounds (CCPs). The yeast analysis allowed testing the ABA agonists for general toxicity, efficient uptake, and specificity in regulating different ABA receptor complexes. Subsequently, promising ABA-mimics were analyzed in vitro for ligand-receptor interaction complemented by physiological analyses. Several CCPs activated ABA signaling in yeast and plant cells. CCP1, CCP2, and CCP5 were by an order of magnitude more efficient than ABA in minimizing transpiration of Arabidopsis plants. In a progressive drought experiment, CCP2 mediated an increase in water use efficiency superior to ABA without trade-offs in biomass accumulation.
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Affiliation(s)
- Jan Roeder
- Department of Botany, Technical University of Munich, Freising, Germany
| | - Jinghui Liu
- Department of Botany, Technical University of Munich, Freising, Germany
| | - Isabel Doch
- Department of Botany, Technical University of Munich, Freising, Germany
| | - Moritz Ruschhaupt
- Department of Botany, Technical University of Munich, Freising, Germany
| | | | - Erwin Grill
- Department of Botany, Technical University of Munich, Freising, Germany
| | - Hendrik Helmke
- Research and Development, Weed Control Research, Division Crop Science, Bayer AG, Frankfurt am Main, Germany
| | - Sabine Hohmann
- Research and Development, Weed Control Research, Division Crop Science, Bayer AG, Frankfurt am Main, Germany
| | - Stefan Lehr
- Research and Development, Weed Control Research, Division Crop Science, Bayer AG, Frankfurt am Main, Germany
| | - Jens Frackenpohl
- Research and Development, Weed Control Research, Division Crop Science, Bayer AG, Frankfurt am Main, Germany
| | - Zhenyu Yang
- Department of Botany, Technical University of Munich, Freising, Germany
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Liu H, Song S, Zhang H, Li Y, Niu L, Zhang J, Wang W. Signaling Transduction of ABA, ROS, and Ca 2+ in Plant Stomatal Closure in Response to Drought. Int J Mol Sci 2022; 23:ijms232314824. [PMID: 36499153 PMCID: PMC9736234 DOI: 10.3390/ijms232314824] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/17/2022] [Accepted: 11/23/2022] [Indexed: 12/05/2022] Open
Abstract
Drought is a global threat that affects agricultural production. Plants have evolved several adaptive strategies to cope with drought. Stomata are essential structures for plants to control water status and photosynthesis rate. Stomatal closure is an efficient way for plants to reduce water loss and improve survivability under drought conditions. The opening and closure of stomata depend on the turgor pressure in guard cells. Three key signaling molecules, including abscisic acid (ABA), reactive oxygen species (ROS), and calcium ion (Ca2+), play pivotal roles in controlling stomatal closure. Plants sense the water-deficit signal mainly via leaves and roots. On the one hand, ABA is actively synthesized in root and leaf vascular tissues and transported to guard cells. On the other hand, the roots sense the water-deficit signal and synthesize CLAVATA3/EMBRYO-SURROUNDING REGION RELATED 25 (CLE25) peptide, which is transported to the guard cells to promote ABA synthesis. ABA is perceived by pyrabactin resistance (PYR)/PYR1-like (PYL)/regulatory components of ABA receptor (RCAR) receptors, which inactivate PP2C, resulting in activating the protein kinases SnRK2s. Many proteins regulating stomatal closure are activated by SnRK2s via protein phosphorylation. ABA-activated SnRK2s promote apoplastic ROS production outside of guard cells and transportation into the guard cells. The apoplastic H2O2 can be directly sensed by a receptor kinase, HYDROGEN PEROXIDE-INDUCED CA2+ INCREASES1 (HPCA1), which induces activation of Ca2+ channels in the cytomembrane of guard cells, and triggers an increase in Ca2+ in the cytoplasm of guard cells, resulting in stomatal closure. In this review, we focused on discussing the signaling transduction of ABA, ROS, and Ca2+ in controlling stomatal closure in response to drought. Many critical genes are identified to have a function in stomatal closure under drought conditions. The identified genes in the process can serve as candidate genes for genetic engineering to improve drought resistance in crops. The review summarizes the recent advances and provides new insights into the signaling regulation of stomatal closure in response to water-deficit stress and new clues on the improvement of drought resistance in crops.
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Berrío RT, Nelissen H, Inzé D, Dubois M. Increasing yield on dry fields: molecular pathways with growing potential. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 109:323-341. [PMID: 34695266 PMCID: PMC7612350 DOI: 10.1111/tpj.15550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 10/08/2021] [Accepted: 10/19/2021] [Indexed: 05/02/2023]
Abstract
Drought stress constitutes one of the major constraints to agriculture all over the world, and its devastating effect is only expected to increase in the following years due to climate change. Concurrently, the increasing food demand in a steadily growing population requires a proportional increase in yield and crop production. In the past, research aimed to increase plant resilience to severe drought stress. However, this often resulted in stunted growth and reduced yield under favorable conditions or moderate drought. Nowadays, drought tolerance research aims to maintain plant growth and yield under drought conditions. Overall, recently deployed strategies to engineer drought tolerance in the lab can be classified into a 'growth-centered' strategy, which focuses on keeping growth unaffected by the drought stress, and a 'drought resilience without growth penalty' strategy, in which the main aim is still to boost drought resilience, while limiting the side effects on plant growth. In this review, we put the scope on these two strategies and some molecular players that were successfully engineered to generate drought-tolerant plants: abscisic acid, brassinosteroids, cytokinins, ethylene, ROS scavenging genes, strigolactones, and aquaporins. We discuss how these pathways participate in growth and stress response regulation under drought. Finally, we present an overview of the current insights and future perspectives in the development of new strategies to improve drought tolerance in the field.
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Affiliation(s)
- Rubén Tenorio Berrío
- Ghent University, Department of Plant Biotechnology and Bioinformatics, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
| | - Hilde Nelissen
- Ghent University, Department of Plant Biotechnology and Bioinformatics, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
| | - Dirk Inzé
- Ghent University, Department of Plant Biotechnology and Bioinformatics, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
- Corresponding Author: Dirk Inzé VIB Center for Plant Systems Biology Ghent University, Department of Plant Biotechnology Technologiepark 71 B-9052 Ghent (Belgium) Tel.: +32 9 3313800; Fax: +32 9 3313809;
| | - Marieke Dubois
- Ghent University, Department of Plant Biotechnology and Bioinformatics, Ghent, Belgium
- VIB Center for Plant Systems Biology, Ghent, Belgium
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6
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Hsu PK, Dubeaux G, Takahashi Y, Schroeder JI. Signaling mechanisms in abscisic acid-mediated stomatal closure. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 105:307-321. [PMID: 33145840 PMCID: PMC7902384 DOI: 10.1111/tpj.15067] [Citation(s) in RCA: 165] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 10/18/2020] [Accepted: 10/29/2020] [Indexed: 05/09/2023]
Abstract
The plant hormone abscisic acid (ABA) plays a central role in the regulation of stomatal movements under water-deficit conditions. The identification of ABA receptors and the ABA signaling core consisting of PYR/PYL/RCAR ABA receptors, PP2C protein phosphatases and SnRK2 protein kinases has led to studies that have greatly advanced our knowledge of the molecular mechanisms mediating ABA-induced stomatal closure in the past decade. This review focuses on recent progress in illuminating the regulatory mechanisms of ABA signal transduction, and the physiological importance of basal ABA signaling in stomatal regulation by CO2 and, as hypothesized here, vapor-pressure deficit. Furthermore, advances in understanding the interactions of ABA and other stomatal signaling pathways are reviewed here. We also review recent studies investigating the use of ABA signaling mechanisms for the manipulation of stomatal conductance and the enhancement of drought tolerance and water-use efficiency of plants.
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Affiliation(s)
- Po-Kai Hsu
- Cell and Developmental Biology Section, Division of Biological Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093-0116, USA
| | - Guillaume Dubeaux
- Cell and Developmental Biology Section, Division of Biological Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093-0116, USA
| | - Yohei Takahashi
- Cell and Developmental Biology Section, Division of Biological Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093-0116, USA
| | - Julian I. Schroeder
- Cell and Developmental Biology Section, Division of Biological Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093-0116, USA
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7
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Raman H, Raman R, McVittie B, Borg L, Diffey S, Singh Yadav A, Balasubramanian S, Farquhar G. Genetic and physiological bases for variation in water use efficiency in canola. Food Energy Secur 2020. [DOI: 10.1002/fes3.237] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Harsh Raman
- NSW Department of Primary Industries Wagga Wagga Agricultural Institute Wagga Wagga NSW Australia
| | - Rosy Raman
- NSW Department of Primary Industries Wagga Wagga Agricultural Institute Wagga Wagga NSW Australia
| | - Brett McVittie
- NSW Department of Primary Industries Wagga Wagga Agricultural Institute Wagga Wagga NSW Australia
| | - Lauren Borg
- University of Wollongong Wollongong NSW Australia
| | | | | | | | - Graham Farquhar
- Research School of Biology Australian National University Canberra ACT Australia
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8
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Taylor G, Donnison IS, Murphy-Bokern D, Morgante M, Bogeat-Triboulot MB, Bhalerao R, Hertzberg M, Polle A, Harfouche A, Alasia F, Petoussi V, Trebbi D, Schwarz K, Keurentjes JJB, Centritto M, Genty B, Flexas J, Grill E, Salvi S, Davies WJ. Sustainable bioenergy for climate mitigation: developing drought-tolerant trees and grasses. ANNALS OF BOTANY 2019; 124:513-520. [PMID: 31665761 PMCID: PMC6821384 DOI: 10.1093/aob/mcz146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/23/2019] [Indexed: 05/29/2023]
Abstract
BACKGROUND AND AIMS Bioenergy crops are central to climate mitigation strategies that utilize biogenic carbon, such as BECCS (bioenergy with carbon capture and storage), alongside the use of biomass for heat, power, liquid fuels and, in the future, biorefining to chemicals. Several promising lignocellulosic crops are emerging that have no food role - fast-growing trees and grasses - but are well suited as bioenergy feedstocks, including Populus, Salix, Arundo, Miscanthus, Panicum and Sorghum. SCOPE These promising crops remain largely undomesticated and, until recently, have had limited germplasm resources. In order to avoid competition with food crops for land and nature conservation, it is likely that future bioenergy crops will be grown on marginal land that is not needed for food production and is of poor quality and subject to drought stress. Thus, here we define an ideotype for drought tolerance that will enable biomass production to be maintained in the face of moderate drought stress. This includes traits that can readily be measured in wide populations of several hundred unique genotypes for genome-wide association studies, alongside traits that are informative but can only easily be assessed in limited numbers or training populations that may be more suitable for genomic selection. Phenotyping, not genotyping, is now the major bottleneck for progress, since in all lignocellulosic crops studied extensive use has been made of next-generation sequencing such that several thousand markers are now available and populations are emerging that will enable rapid progress for drought-tolerance breeding. The emergence of novel technologies for targeted genotyping by sequencing are particularly welcome. Genome editing has already been demonstrated for Populus and offers significant potential for rapid deployment of drought-tolerant crops through manipulation of ABA receptors, as demonstrated in Arabidopsis, with other gene targets yet to be tested. CONCLUSIONS Bioenergy is predicted to be the fastest-developing renewable energy over the coming decade and significant investment over the past decade has been made in developing genomic resources and in collecting wild germplasm from within the natural ranges of several tree and grass crops. Harnessing these resources for climate-resilient crops for the future remains a challenge but one that is likely to be successful.
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Affiliation(s)
- G Taylor
- School of Biological Sciences, University of Southampton, Southampton, UK
- Department of Plant Sciences, University of California at Davis, Davis, CA, USA
| | - I S Donnison
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Plas Gogerddan, Aberystwyth, Ceredigion, UK
| | | | - M Morgante
- Department of Agricultural and Environmental Sciences, University of Udine, Via delle Scienze, Udine, Italy
| | | | - R Bhalerao
- Department of Forest Genetics and Plant Physiology, Umea Plant Sciences Centre, Swedish University of Agricultural Sciences, Umea, Sweden
| | - M Hertzberg
- SweTree Technologies AB, SE-904 03 Umeå, Sweden
| | - A Polle
- Büsgen‐Institute, Department of Forest Botany and Tree Physiology, Georg‐August University, Göttingen, Germany
| | - A Harfouche
- Department for Innovation in Biological, Agro-food and Forest Systems, University of Tuscia, Viterbo, Italy
| | - F Alasia
- Franco Alasia Vivai, Strada Solerette, Savigliano, Italy
| | - V Petoussi
- Department of Sociology, University of Crete, Rethymno, Greece
| | - D Trebbi
- Geneticlab, Via Roveredo, Pordenone, Italy
| | - K Schwarz
- Julius Kühn‐Institut (JKI) Bundesforschungsinstitut für Kulturpflanzen, Institute for Crop and Soil Science, Bundesallee 50, D‐38116 Braunschweig, Germany
| | - J J B Keurentjes
- Laboratory of Genetics, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands
| | - M Centritto
- Trees and Timber Institute, National Research Council of Italy, Sesto Fiorentino, Italy
| | - B Genty
- Aix-Marseille University, CEA, CNRS, BIAM, UMR 7265, Saint Paul lez Durance, France
| | - J Flexas
- Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa, Palma de Mallorca, Illes Balears, Spain
| | - E Grill
- Lehrstuhl für Botanik, Technische Universität München, Freising, Germany
| | - S Salvi
- Department of Agricultural and Food Sciences, University of Bologna, Viale Fanin, Bologna, Italy
| | - W J Davies
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
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Mega R, Tsujimoto H, Okamoto M. Genetic manipulation of abscisic acid receptors enables modulation of water use efficiency. PLANT SIGNALING & BEHAVIOR 2019; 14:e1642039. [PMID: 31311440 PMCID: PMC6768217 DOI: 10.1080/15592324.2019.1642039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 06/23/2019] [Indexed: 05/08/2023]
Abstract
The phytohormone abscisic acid (ABA) is a key signal molecule for controlling stomatal movement and stress responses such as drought. Genetic manipulation of ABA receptors has recently been reported to improve plant water use efficiency (WUE). We therefore compared details of WUE traits between the ABA receptor quintuple mutant and wheat ABA receptor-overexpressing Arabidopsis lines. Biomass and seed productivities per liter of water were both reduced in the receptor mutant but improved in the transgenic Arabidopsis lines. This result suggests that appropriate modulation of ABA receptors can extend crop potential productivity.
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Affiliation(s)
- Ryosuke Mega
- Arid Land Research Center, Tottori University, Tottori, Japan
| | | | - Masanori Okamoto
- Center for Bioscience Research and Education, Utsunomiya University, Tochigi, Japan
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