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Guard-cell-targeted overexpression of Arabidopsis Hexokinase 1 can improve water use efficiency in field-grown tobacco plants

dc.creatorAcevedo-Siaca, L.G.
dc.creatorGłowacka, K.
dc.creatorDriever, S.M.
dc.creatorSalesse-Smith, C.
dc.creatorLugassi, N.
dc.creatorGranot, D.
dc.creatorLong, S.P.
dc.creatorKromdijk, J.
dc.date2023-03-11T00:20:17Z
dc.date2023-03-11T00:20:17Z
dc.date2022
dc.date.accessioned2023-07-17T20:10:29Z
dc.date.available2023-07-17T20:10:29Z
dc.identifierhttps://hdl.handle.net/10883/22544
dc.identifier10.1093/jxb/erac218
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7514287
dc.descriptionWater deficit currently acts as one of the largest limiting factors for agricultural productivity worldwide. Additionally, limitation by water scarcity is projected to continue in the future with the further onset of effects of global climate change. As a result, it is critical to develop or breed for crops that have increased water use efficiency and that are more capable of coping with water scarce conditions. However, increased intrinsic water use efficiency (iWUE) typically brings a trade-off with CO2 assimilation as all gas exchange is mediated by stomata, through which CO2 enters the leaf while water vapor exits. Previously, promising results were shown using guard-cell-targeted overexpression of hexokinase to increase iWUE without incurring a penalty in photosynthetic rates or biomass production. Here, two homozygous transgenic tobacco (Nicotiana tabacum) lines expressing Arabidopsis Hexokinase 1 (AtHXK1) constitutively (35SHXK2 and 35SHXK5) and a line that had guard-cell-targeted overexpression of AtHXK1 (GCHXK2) were evaluated relative to wild type for traits related to photosynthesis and yield. In this study, iWUE was significantly higher in GCHXK2 compared with wild type without negatively impacting CO2 assimilation, although results were dependent upon leaf age and proximity of precipitation event to gas exchange measurement.
dc.description5745-5757
dc.languageEnglish
dc.publisherOxford University Press
dc.relationhttps://academic.oup.com/jxb/article/73/16/5745/6589979#372441266
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source16
dc.source73
dc.source0022-0957
dc.sourceJournal of Experimental Botany
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectCO2 Assimilation
dc.subjectCARBON DIOXIDE
dc.subjectHEXOKINASE
dc.subjectPHOTOSYNTHESIS
dc.subjectWATER USE EFFICIENCY
dc.subjectWheat
dc.titleGuard-cell-targeted overexpression of Arabidopsis Hexokinase 1 can improve water use efficiency in field-grown tobacco plants
dc.typeArticle
dc.typePublished Version
dc.coverageOxford (United Kingdom)


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