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酸生物合成是必要的,以使素完全对皮细胞延长的作用
Ryan J Emenecker1,2,3, Joseph Cammarata4, Irene Yuan1
1Department of Biology, Washington University, St. Louis, MO 63130, USA.
概括
素和酸 (ABA) 协调植物生长. 辅酶刺激ABA生物合成以调节阴囊细胞延长,但不能调节根生长,显示出一种特定的荷尔蒙相互作用.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 素是调节植物生长和发育的关键植物激素.
- 奥素和其他植物激素 (如酸 (ABA)) 之间的精确协调机制仍然不完全理解.
研究的目的:
- 调查奥克辛和ABA在调节植物生长中的相互作用,特别是Arabidopsis hypocotyls.
- 阐明ABA生物合成在调解auxin对 hypocotyl和根延长的影响中的作用.
主要方法:
- 前进遗传学屏幕以识别影响激素反应的突变物.
- 转录组分析以确定不同组织中的辅酶反应基因.
- 在不同的ABA通路条件下对素对皮细胞和根延长的影响的比较分析.
主要成果:
- ABA生物合成对于auxin对hypocotyls的全面延长作用至关重要.
- 对于auxin对根延长的抑制作用,不需要ABA生物合成.
- 转录组数据揭示了根和芽组织中独特的辅酶反应基因,许多辅酶抑制的基因需要完整的ABA通路才能完全抑制.
结论:
- 一个特定的auxin-ABA相互作用模块协调了Arabidopsis hypocotyl中的激素活动.
- 素刺激了ABA生物合成,以实现完全调节阴细胞延长.
- 根和芽组织中的基因调节差异是组织特异性的激素反应的基础.
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