2016
DOI: 10.3389/fpls.2016.01285
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Overexpression of AtEDT1/HDG11 in Chinese Kale (Brassica oleracea var. alboglabra) Enhances Drought and Osmotic Stress Tolerance

Abstract: Plants are constantly challenged by environmental stresses, including drought and high salinity. Improvement of drought and osmotic stress tolerance without yield decrease has been a great challenge in crop improvement. The Arabidopsis ENHANCED DROUGHT TOLERANCE1/HOMEODOMAIN GLABROUS11 (AtEDT1/HDG11), a protein of the class IV HD-Zip family, has been demonstrated to significantly improve drought tolerance in Arabidopsis, rice, and pepper. Here, we report that AtEDT1/HDG11 confers drought and osmotic stress tol… Show more

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Cited by 40 publications
(39 citation statements)
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“…For instance, the ectopic overexpression of the HD-ZIP transcription factor HDG11 leads to high drought tolerance in Arabidopsis, a phenotype (extremely drought tolerant, edt1) that may be explained by the induction of the expression of cell-wall-loosening protein genes, which in turn leads to the formation of deeper primary roots and more lateral roots than wild-type lines (Yu et al, 2008) (see also Section 3.1 on stomata for further discussion of HDG11 and this mechanism). Similar phenotypes have been found in Chinese kale, rice, poplar, and cotton when the HDG11 transcription factor is ectopically overexpressed (Yu et al, 2013(Yu et al, , 2016Zhu et al, 2016). Transgenic rice plants overexpressing EDT/HDG11 showed drought tolerance at reproductive stage without a yield penalty (Yu et al, 2013).…”
Section: Molecular Targets For Root Drought Responsessupporting
confidence: 73%
See 1 more Smart Citation
“…For instance, the ectopic overexpression of the HD-ZIP transcription factor HDG11 leads to high drought tolerance in Arabidopsis, a phenotype (extremely drought tolerant, edt1) that may be explained by the induction of the expression of cell-wall-loosening protein genes, which in turn leads to the formation of deeper primary roots and more lateral roots than wild-type lines (Yu et al, 2008) (see also Section 3.1 on stomata for further discussion of HDG11 and this mechanism). Similar phenotypes have been found in Chinese kale, rice, poplar, and cotton when the HDG11 transcription factor is ectopically overexpressed (Yu et al, 2013(Yu et al, , 2016Zhu et al, 2016). Transgenic rice plants overexpressing EDT/HDG11 showed drought tolerance at reproductive stage without a yield penalty (Yu et al, 2013).…”
Section: Molecular Targets For Root Drought Responsessupporting
confidence: 73%
“…This pathway, also beneficial in root development (see Section 2.3) (Yu et al, 2013), is putatively driven by EDT1/HDG11-upregulation of ERECTA, which likely induces cell endoreduplication and expansion via the transcription factor E2Fa. Indirect manipulation of ERECTA through EDT1/HDG11 overexpression has already been shown to reduce stomatal densities and enhance drought tolerance in several crop species including cotton and poplar (Yu et al, 2016), wheat , alfalfa (Zheng et al, 2017), sweet potato (Ruan et al, 2012), pepper , and Chinese kale (Zhu et al, 2016). As these data suggest promising yield data and appear to target both above-ground and below-ground traits, EDT1/HDG11, and its novel pathway may be strong contenders for crop improvement under drought.…”
Section: Targeting Stomatal Developmentmentioning
confidence: 86%
“…The homeodomain transcriptional factor EDT1/HDG11 upregulates the ERECTA expression, ERECTA promotes endoreduplication through E2Fa, leading to higher ploidy level and thus larger cells and reduced stomatal density, ultimately improving WUE. AtEDT1/HDG11conferred drought resistance and improved WUE have been recapitulated by overexpressing AtEDT1/HDG11in many plant species, including monocots and woody plant (Yu et al, 2008;Cao et al, 2009;Ruan et al, 2012;Yu et al, 2013;Zhu et al, 2015;Li et al, 2016;Yu et al, 2016;Zhu et al, 2016;Liu et al, 2017), implicating a possible conserved mechanism in plants.…”
Section: Discussionmentioning
confidence: 99%
“…Furthermore, a member of HD-Zip class IV, Arabidopsis EDT1/HDG11 was identified as a key player to improve drought tolerance. Overexpression of AtEDT1/ HDG11 enhances tolerance to drought stress in rice, Arabidopsis, tobacco, cotton, pepper and Chinese kale via reduction in stomatal density, acceleration of stomatal closure and improvement of root system (Yu et al, 2008(Yu et al, , 2013(Yu et al, , 2016Zhu et al, 2015;Zhu et al, 2016). However, the underlying molecular mechanisms of their drought tolerance are not well understood.…”
Section: Introductionmentioning
confidence: 99%