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适用于葡萄 (Vitis vinifera L.) 果大小的GA₃的监管机制

Wen-Fang Li¹, Qi Zhou², Zong-Huan Ma¹

¹College of Horticulture, Gansu Agricultural University, Lanzhou, 730070, PR China.

Plant physiology and biochemistry : PPB

|March 30, 2024

概括

吉伯雷林A3 (GA3) 通过增强细胞扩张和改变激素水平,显著增加了葡萄的大小. 非编码RNA被确定为GA3介导的水果发育过程中的关键调节者.

科学领域:

植物生物学植物生物学
分子生物学分子生物学
农业科学农业科学

背景情况:

吉伯雷林A3 (GA3) 是一种关键的植物激素,调节生长和发育.
了解GA3在果实发育中的作用,特别是葡萄树中的作用,对于农业应用至关重要.
非编码RNAs (ncRNAs) 在GA3介导的果实大小调节中的参与仍然在很大程度上未被探索.

研究的目的:

为了研究GA3对"红球"葡萄果的发育的影响.
确定分子机制,包括激素信号传递和ncRNA调节,是GA3诱导的果实大小增加的基础.
探索特定基因和ncRNAs在控制葡萄大小方面的潜在作用.

主要方法:

在初始扩张阶段将Tween-20配方的GA3应用于葡萄集群.
分析水果的物理参数 (细胞长度,大小,直径,体积).
植物激素水平的量化 (IAA,ZT,ABA).
RNA测序用于识别差异表达的mRNA,lncRNA和miRNA.
在番茄中对VvRAX2的基因表达分析和功能验证.

主要成果:

GA3的应用显著增加了葡萄果细胞的大小,直径和体积.
GA3改变了内源性激素水平,增加了辅酶 (IAA) 和血 (ZT),同时降低了ABA.
不同表达分析揭示了mRNA,lncRNA和miRNA配置文件的变化,涉及激素通路和特定基因 (GID2,SAUR,ACS).
预测特定的miRNAs可以调节参与水果发育的关键基因.
在番茄中证实了GA3对VvRAX2的上调及其在增加果实大小中的作用.

结论:

GA3有效地促进葡萄果的发育和大小的增加.
GA3诱导的果实扩大涉及复杂的荷尔蒙交叉和差异性基因表达.
非编码RNAs,特别是miRNAs,通过调节关键发育基因,在调节GA3对葡萄大小的影响方面发挥着重要作用.
VvRAX2是水果大小的潜在积极调节者,为未来的育种策略提供了目标.

关键词:

果实大小果实大小基因表达基因表达基因表达吉伯雷林 A ((3)) 是一个葡萄是葡萄中的一种.这就是VvRAX2的原因.这是一个微型RNA.

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