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对比的表型和转录基因分析揭示了形成更大的叶片叶片的潜在分子基础在自动四叶复合的麻豆

Jian Wu¹, Wei Shu², Yanyu Zhang³

¹Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, 650224, China.

BMC plant biology

|September 26, 2025

概括

在子豆中,全基因组重复导致叶子变大,原因是细胞大小和数量增加. 参与细胞扩张和分裂的关键基因,以及辅酶信号传递,在自动四体中被上调,导致叶子扩大.

科学领域:

植物遗传学植物遗传学
分子生物学分子生物学
农作物科学农作物科学

背景情况:

众所周知,全基因组复制 (WGD) 事件会增加植物大小.
在自聚合体中形成较大的叶子背后的分子机制在很大程度上仍未被探索.
豆 (Ricinus communis L.) 作为研究WGD对叶子形态学影响的模型.

研究的目的:

为了研究自身多合体植物中叶子大小变化的分子基础.
为了确定关键的基因和调节叶子膨胀的通路在合成的自带四形麻豆.
了解基因剂量效应在特征变异中的作用.

主要方法:

生产合成的自带四形麻豆.
组织学分析以比较二倍体和四倍体之间的细胞大小和数量.
RNA测序以识别 ploidy 级别之间的差异表达基因 (DEG).
分析与细胞壁修饰,扩张,分裂和辅酶信号传递相关的基因表达.

主要成果:

自体四倍体豆表现出明显更大的叶面积比双倍体.
叶子扩大在四体中是细胞大小和细胞数量增加的结果.
RNA测序确定了3464个DEG,其中包括参与细胞壁松动 (例如SUS2,XTH30),细胞扩张 (例如EXPA1,EXPB3) 和细胞分裂 (例如CYCD3;1) 的基因的上调.
辅酶响应基因 (例如,SAUR20) 和转录因子 (例如,HAT22,DOF3.4) 的上调进一步支持增强的细胞扩张和延长.

结论:

基因剂量效应在自聚合体中显著影响植物特征变异.
特定的分子通路,包括细胞壁代谢,细胞循环调节和辅酶信号传递,对于WGD诱导的叶子扩大至关重要.
研究结果为植物结构的遗传控制和作物改良中的潜在应用提供了洞察力.

关键词:

自动化地拉皮化.麻豆是一种麻豆.细胞分裂细胞分裂细胞扩张细胞扩张叶子的大小叶子大小植物激素植物激素

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