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CsUGT87A1基因通过调节IAA恒温度来提高茶叶植物的干旱应激耐受性

Salome Njeri Ndombi¹, Yiwen Chen¹, Qinqin Gao¹

¹College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.

Plant physiology and biochemistry : PPB

|June 18, 2025

概括

一种新的茶叶植物基因,CsUGT87A1,通过积极调节辅酶 (IAA) 生物合成,增强了抗干旱能力. 这一发现为开发具有改善水应激耐受性的作物提供了一条途径.

科学领域:

植物生物学植物生物学
分子遗传学分子遗传学
无生性压力生理学生物压力生理学

背景情况:

干旱压力对全球农业产生重大影响,需要对植物抵抗机制进行研究.
UDP - 葡萄糖转移酶 (UGTs) 在植物发育和应激反应中起着至关重要的作用,但它们在非生物应激下的具体功能往往不清楚.
茶叶植物 (Camellia sinensis) 在经济上很重要,了解它们的耐压路径至关重要.

研究的目的:

为了研究一种新发现的茶叶植物甘氨基转移酶,CsUGT87A1的功能,以应对干旱压力.
阐明CsUGT87A1对植物抗旱能力的分子机制.
探索CsUGT87A1在开发耐旱转基因作物的潜力.

主要方法:

在干旱条件下对CsUGT87A1的基因表达分析.
在细胞下定位和体外酶活性测试的重组CsUGT87A1 (rCsUGT87A1) 使用印醇-3-酸 (IAA) 作为基质.
在茶叶植物中使用反感官寡核酸 (ASO) 技术的基因沉默和在阿拉比多普西斯塔利亚纳中异质表达.

主要成果:

CsUGT87A1的表达因干旱而显著上调,并且主要局限于细胞核,并证明了IAA结合活性.
茶叶植物中CsUGT87A1的下调降低了干旱抵抗力,降低了内源性IAA水平.
在阿拉比多普西斯中,CsUGT87A1的异构表达增强了对干旱的耐受性,可以通过改善发芽,根生长,光合作用,烯积累和抗氧化活性来证明,同时减少了氧化损伤.

结论:

CsUGT87A1 作为印醇-3-酸 (IAA) 生物合成的积极调节剂,从而增强了植物的抗干旱能力.
这项研究扩大了auxin glycosyltransferases在植物水应激耐受性方面的已知作用.
这些发现为工程作物提供了基础,提高了对干旱条件的抵御力.

关键词:

卡梅利亚·辛内西斯 (Camellia sinensis) 是一种植物.在CsUGT87A1中.干旱造成的压力是干旱.葡萄糖基转移酶是什么?美国IAA IAA

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