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草根蛋白质组学揭示了融合结耐受性的策略

Elad Oren¹, Jingjing Zhai¹, Travis E Rooney²

¹Institute for Genomic Diversity, Cornell University, Ithaca, NY 14853, USA.

bioRxiv : the preprint server for biology

|July 15, 2025

概括

野生草独立地通过类似的蛋白质表达变化进化了耐性,提供了改善玉米耐寒性的目标. 这项研究揭示了提高作物的关键冷保护机制.

科学领域:

植物科学植物科学
分子生物学分子生物学
进化生物学进化生物学

背景情况:

精英玉米缺乏在温带地区早期种植所需的耐寒性.
延长玉米生长季节可以提高生产率和营养使用效率.
野生 PACMAD 草在它们的根茎中融合进化了结耐受性.

研究的目的:

揭示野生PACMAD草的冷耐受性趋同演变的分子基础.
为了确定与冬季休眠和耐受性相关的保护蛋白质水平适应.
探索改善玉米耐寒性的潜在目标.

主要方法:

在根茎组织上使用双重质量标签标记和枪质量谱学的蛋白质组分析.
五种草种冬季休眠期和夏季活动期间蛋白质丰富度的比较.
蛋白质家族的生物信息分析,功能丰富和结构性质.

主要成果:

在所有五种物种中,在冬季330个蛋白质家族都得到了持续的上调.
三种蛋白质家族 - - 乳酸胚胎生成丰富3 (LEA3),阿尔多缩小酶和氨酸乙醇胺结合蛋白 (PEBP) - - 普遍上调.
在耐寒物种中观察到LEA3蛋白中保留的疏水性模式,但在玉米中发生了改变.
功能丰富揭示了冷保护剂的反复使用,如脂质转移蛋白和热冲击蛋白.

结论:

在PACMAD草中,根茎对的耐受性的独立进化是由类似的机制控制的.
蛋白质结构适应所补充的表达水平变化是耐性的关键驱动因素.
根茎蛋白质反应中保存的签名类似于幼苗的叶子,突出突出发芽衍生的身份.
已确定保存的蛋白质和途径为提高玉米的冷耐受性提供了候选目标.

关键词:

结耐受度结耐受度草是一种草,草是一种草.蛋白质组学是指蛋白质组学.这里是Tripsacum.

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