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在Tamarix chinensis L.中LTR逆转录酶逆转录酶的表征和在盐和压力下的活动分析

Long Wang^1,2, Bo Li¹, Yuqian Wang¹

¹Laboratory of Plant Epigenetics and Evolution, School of Life Sciences, Liaoning University, Shenyang 110036, China.

|November 27, 2025

概括

在Tamarix chinensis中的可转移元素在盐和应激下激活,产生适应至关重要的遗传变异. 这项研究确定了应激反应中涉及的关键元素,为盐酸性土地回收提供了洞察力.

科学领域:

基因组学和分子生物学
植物科学植物科学
进化生物学进化生物学

背景情况:

可转移元素 (TE) 是植物中重要的基因组组成部分,推动了适应性进化和应激耐受性.
在非生物压力下TE激活会产生遗传变异,并调节应激反应基因表达.
沙漠先驱的Tamarix chinensis在盐条件下对LTR逆转移素活性进行了不足的研究.

研究的目的:

为了描述Tamarix chinensis中LTR逆转移子的逆转录酶 (RT) 域.
为了研究这些逆转移体的激活模式,以应对盐和的压力.
为了确定参与Tamarix chinensis适应盐环境的候选TE.

主要方法:

安普利康测序用于识别Tamarix chinensis中的Ty1-copia和Ty3-gypsy RT序列.
进行了遗传学分析,以确定进化关系和潜在的水平转移.
用表达式分析 (RT-qPCR) 来评估在盐和压力条件下的TE激活.

主要成果:

确定了629个Ty1-copy和607个Ty3-gypsy RT序列,其中许多显示出潜在转换的迹象.
遗传学分析表明与相关物种有着密切的关系,这表明可能存在横向基因转移.
在盐 (634) 和 (181) 应力下观察到RT序列的显著激活,主要是盐应力下的Ty1-copy.
特定的子家族 (Angela,Tekay,Reina) 被确定为压力诱导的逆转移素活性中的关键参与者.
四个Ty1-copy和五个Ty3-gypsy元素被确定为应激反应的候选关键LTR逆转移体.

结论:

这项研究揭示了Tamarix chinensis适应盐压力的表观遗传机制的新见解.
激活的LTR逆转移体,特别是Ty1-copia,在Tamarix chinensis的压力反应中起着至关重要的作用.
这些发现为利用Tamarix chinensis在盐酸性土地回收工作中提供了理论基础.

关键词:

在LTR-反向转换中.泰马里克斯中国人L. L.无生物压力是无生物压力.进化演化演化演化演化演化演化演化异质性的异质性反向转录酶 (RT) 是一种

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