【摘 要】
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Abscisic acid (ABA),one of plant hormones,is critical to plant growth and development as well as responses to abiotic stresses.We previously isolated VvWRKY 13,a novel transcription factor from grapev
【机 构】
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Key Lab of Plant Biotechnology in Universities of Shandong Province, Life Science College of Qingdao
【出 处】
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第六届全国果树分子生物学学术研讨会
论文部分内容阅读
Abscisic acid (ABA),one of plant hormones,is critical to plant growth and development as well as responses to abiotic stresses.We previously isolated VvWRKY 13,a novel transcription factor from grapevine and here we present evidence that VvWRKY13 may regulate ABA biosynthesis in plants.When VvWRKY13 was ectopically expressed in transgenic Arabidopsis,the expressing lines showed delayed seed germination,smaller stomatal opening,and several other phenotypes that are consistent with the elevated ABA levels in these plants.Sequence analysis identified WRKY-specific binding elements (W-box or W-like box) in the promoter regions of several genes in grapevine ABA synthetic pathway.Indeed,transient overexpression of VvWRKY13 in grapevine leaves significantly increased the levels of ABA synthetic pathway genes.Taken together,we conclude that VvWRKY13 may promote ABA production by activating genes in the ABA synthetic pathway.
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