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在过渡到幼苗的过程中,Aethionema arabicum二形种子特征重置

Waheed Arshad¹, Tina Steinbrecher¹, Per K I Wilhelmsson²

¹Seed Biology and Technology Group, Department of Biological Sciences, Royal Holloway University of London, Egham, United Kingdom.

Frontiers in plant science

|March 25, 2024

概括

植物异态散体使用不同的发芽策略. 不同类型的散体种子表现出明显的早期生长和基因表达,突出显示了在这个脆弱阶段的转录重置.

科学领域:

植物生物学植物生物学
发育生物学是发展生物学.
进化生态学的进化生态学

背景情况:

播种基地是一个关键和脆弱的植物生命阶段.
异态散体 (产生不同的分散单位) 是适应可变环境的适应性策略.
对于具有异态异体的物种中幼苗的发育知之甚少.

研究的目的:

为了研究发芽和出现前的苗木生长在二形异体异体模型 *Aethionema arabicum*.
为了比较种子对环境因素的反应,跨越不同的散播形态.
分析幼苗早期发育过程中的转录基因变化.

主要方法:

在不同温度下进行的粘性种子 (M+),无色果实 (IND) 和裸种子 (M-) 的比较发芽试验.
来自M+,M-,和IND散发的苗木的生长试验.
扩散体和早期幼苗的转录组分析 (RNA测序).
鉴定与激素调节,运输和细胞壁修饰相关的差异表达基因 (DEGs).

主要成果:

来自M+和M-形态的苗木对温度和水位的反应类似.
来自IND水果的苗木表现出曲的 hypocotyls 和较慢的芽/根生长,但类似的 hypocotyl 生物力学.
转录组分析显示,在晚发芽和幼苗早期生长期间,基因表达发生了显著的变化,发芽后的DEG显著减少.
关键的DEG包括激素调节剂 (auxin,乙烯, gibberellins),输送剂和细胞壁重塑酶.

结论:

模态幼苗表现出不同的发育途径和反应.
转录重置发生在从发芽的散体过渡到出现前的幼苗期间.
基因表达模式表明,在幼苗的早期发育过程中,荷尔蒙信号传递,营养/水运输和细胞壁修饰的作用.

关键词:

投注对冲策略投注对冲策略异国异体的二态性.果子和种子的异构形态.周围骨所施加的休眠状态在出现之前的增长率增长.种子种植过渡种植过渡苗木应激弹性抗压能力转录基因组重置的重置

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