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基因重复促进了普通黄的C4-CAM兼容性

Xiaoliang Wang^1,2,3,4, Xuxu Ma^1,3,4,5, Ge Yan^1,3,4,5

¹Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.

Plant physiology

|August 17, 2023

概括

常见的鱼表现出C4和crassulacean酸代谢 (CAM) 光合作用. 基因组分析显示,两个全基因组重复 (WGD) 塑造了其独特的光合作用途径,为作物工程提供了洞察力.

科学领域:

植物生物学植物生物学
基因组学就是基因组学.
光合作用研究研究光合作用.

背景情况:

常见的 (Portulaca oleracea) 独特地结合了C4和酸代谢 (CAM) 光合作用.
这种可塑性使其成为研究C4-CAM集成的有价值模型.

研究的目的:

为了生成一个高质量的基因组组合的普通.
为了研究这种物种中C4和CAM路径的进化历史.
为了确定C4-CAM可塑性背后的遗传机制.

主要方法:

染色体层次的基因组测序和组装.
遗传学分析和全基因组复制 (WGD) 测年.
基因复制数变异分析.
对基因促进体中cis调节元件的分析.

主要成果:

一个高质量的NAD-酶 (ME) 亚型常见 purslane的基因组被生产出来.
有两个WGD事件的证据:一个古老的P-β (66.30万年前) 和一个血统特定的Po-α (7.74万年前).
Po-α WGD生成了C4光合作用C4光合作用C4光合作用的酸核糖酶基因拷贝.
P-β WGD产生了功能差异化的β碳酸无水酶 (C4-和CAM-特定) 的祖先基因.
特定于CAM的基因招募了昼夜和乙烯反应因子 cis 元素.

结论:

这项研究阐明了普通鸟中C4和CAM通路的进化起源.
WGD事件在扩大光合作用基因家族方面发挥了关键作用.
识别的监管要素提供了在作物中设计C4或CAM代谢的目标.

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