优化以乙为媒介的糖分配,以增加玉米的核数
Ping Zhang1, Yating Zhao2, Fangfang Ning3
1Institute of Maize and Featured Upland Crops, Zhejiang Academy of Agricultural Sciences, Dongyang, 322100, China.
The Plant journal : for cell and molecular biology
|January 16, 2026
概括
延迟在玉米 (Zea mays L.) 中应用乙太会通过改善对玉米的同化物分配来增加核数. 这一策略优化了糖分和利用,提高了谷物产量.
科学领域:
- 植物生理学 植物生理学
- 农业科学 农业科学
- 分子生物学分子生物学
背景情况:
- 延迟以太的应用通过增强的同化物分配增加了玉米核数量,但机制尚不清楚.
- 了解这些机制对于通过植物生长调节器定时优化玉米产量至关重要.
研究的目的:
- 调查延迟以太应用对玉米核发育的生理和分子效应.
- 阐明ethphon时间如何影响干物质积累,分离和碳水化合物代谢.
主要方法:
- 埃塞在8-15叶阶段 (E8-E15) 应用给玉米植物.
- 对内部节点延长,干物质和内核集的生理测量.
- 在丝和丝后8天进行RNA测序 (RNA-seq) 分析.
主要成果:
- 延迟应用乙 (E14-E15) 显著缩短了内部节点和增加了整个植物的干物质.
- 耳朵干燥物质增加,导致较高的核数 (+8.3%) 和谷物产量 (+7.4%),但不影响尖端粒数.
- 在丝时耳朵中糖和三糖-6-酸盐 (T6P) 的升高提高了同化物进口和利用.
结论:
- 延迟以太的应用通过减缓茎的生长,优化了开花前的糖糖分离到耳朵.
- 增强的T6P积累和抑制的糖糖非发酵1相关蛋白激酶 (SnRK1) 活动改善了耳垂容量.
- 促进花期后的糖糖利用,从而增加玉米核数量和产量.
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