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Baldcypress 基因组提供了关于洪水应激耐受性适应性演变的见解

Ying Yang¹, Chaoguang Yu¹, Jianfeng Hua¹

¹Jiangsu Key Laboratory for Conservation and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210 014, China.

The New phytologist

|May 23, 2025

概括

Baldcypress,一个耐洪水的高精子植物,揭示了它在湿条件下生存的遗传秘密. 这项研究将其基因组与其他植物进行比较,以揭示保存和独特的抗洪水机制.

科学领域:

植物基因组学和进化生物学
植物应力耐受性的分子机制

背景情况:

大多数体育种类表现出较低的洪水耐受性,与适应湿地的物种形成鲜明对比.
Baldcypress (Taxodium distichum var. 这种植物是一种的植物. (distichum) 是一种独特的高精植物,在被洪水淹没的环境中壮成长.
了解白树对洪水耐受性的遗传基础可以为植物适应提供洞察力.

研究的目的:

为了研究头的洪水耐受性的遗传基础.
为了执行第一个染色体层次的基因组组装 baldcypress.
为了比较基因表达,调节元件和基因扩张在耐洪水和不耐洪水的物种.

主要方法:

白的染色体级基因组组 (大约7.82 Gb,44 010个蛋白质编码基因).
基因表达,调节元件和基因组的比较分析,使用白,大米 (Oryza sativa),Arabidopsis thaliana和树 (Taxus wallichiana).
识别与洪水压力相关的常见和独特调节的基因和途径.

主要成果:

确定了409个常见的上调和668个常见的下调的正统组,表明保存的洪水应激反应.
发现了352个正统组,在耐洪水的白树中具有更多的上调基因.
揭示了白树和大米的独特进化策略,包括ERF-VII转录激活,抗氧化途径,结合体基因 (白树) 和能量产生基因 (大米) 的扩张.

结论:

Baldcypress 使用独特的进化策略,以及保存的机制,以实现对洪水的耐受性.
比较基因组学强调了植物对洪水反应途径的多样性和共同性.
这些发现为植物对洪水耐受性的遗传改进提供了理论基础.

关键词:

皮的塞浦路斯融合进化的趋同.洪水压力是洪水压力.基因组基因组是基因组的组成部分.运动精子 (gymnosperm) 是一种精子.

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