在花开的时候,ACC SYNTHASE4 抑制了吉伯雷林生物合成和花LOCUS T 表达
Le-Le Chu1, Wei-Xuan Zheng1, Hai-Qiang Liu1
1National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China.
Plant physiology
|January 16, 2024
概括
乙烯和吉布雷林 (GA) 调节类植物的开花. 过度表达CiACS4会延迟开花,并通过抑制CiFT和CiFE增加花数,从而为产量管理提供了洞察力.
科学领域:
- 植物生物学 植物生物学
- 园艺园艺 园艺园艺
- 分子遗传学 分子遗传学
背景情况:
- 花期对于果树的产量和成熟度至关重要.
- 乙烯和 (GA) 是开花的关键调节剂,但它们在木质植物中的协调机制尚不清楚.
- 了解这些荷尔蒙相互作用对于农业应用至关重要.
研究的目的:
- 阐明果中乙烯和吉伯雷林的结花协调调节机制.
- 为了研究1-aminocyclopropane-1-carboxylic acid synthase 4 (CiACS4) 和乙烯反应因子3 (CiERF3) 在花的作用.
- 为使用乙烯来调节花数和减轻气候变化对水果产量影响提供理论基础.
主要方法:
- 在 *Nicotiana tabacum* 和类中,CiACS4 和 CiERF3 的过度表达.
- 分析开花时间,花数和生物化学含量 (乙烯,粉,可溶糖).
- 促进体结合测定和基因表达分析的 * 开花的位置T * (CiFT) 和 * 金色的2-Like * (CiFE).
主要成果:
- 过度表达CiACS4和CiERF3导致花期延迟,N. tabacum和类植物的花数增加,伴随着乙烯,粉和可溶糖水平的改变.
- CiACS4-CiERF3复合体抑制了CiFT和CiFE的表达.
- 过度表达CiFE导致早期开花和鲜花减少,与CiACS4过度表达相比,生化变化相反. 此外,CiFE也对CiFT的发起人具有约束力.
结论:
- 乙烯由CiACS4和CiERF3介导,通过抑制CiFT和CiFE,在延迟开花和增加果中的花数方面发挥着重要作用.
- 吉伯雷林 (GA) 和乙烯处理/抑制剂影响开花时间和花数,支持它们的调节作用.
- 这项研究为应用以乙烯为基础的策略提供了基础,以优化果产量和应对环境挑战的弹性.
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