热应激会影响的发育,并减少夏季玉米的核数量
Pan Liu1,2, Baozhong Yin3, Limin Gu1,2
1College of Agronomy, Hebei Agricultural University, Baoding, China.
Frontiers in plant science
|June 23, 2023
概括
热应激 (HTS) 通过损害生殖发育,显著降低了玉米产量. 关键因素包括减少花粉数量,重量和活力,影响核数量.
科学领域:
- 植物科学 植物科学
- 农业学是一种农业学.
- 压力生理学 压力生理学
背景情况:
- 玉米的谷物产量在关键的繁殖阶段受到热应激 (HTS) 的严重影响.
- 对于HTS对玉米生殖器官和核的影响的确切机制仍然不充分理解.
研究的目的:
- 研究热应激对玉米生殖器官形态和生理学的影响.
- 阐明热应激引起的,,花粉的变化与随后的核数量减少之间的关系.
主要方法:
- 两种玉米品种,耐热ND372和耐热XY335,经受热应激 (HTS) 和自然控制 (CK) 条件.
- 从V9阶段到anthesis,评估了,和花粉的形态和生理特征.
- 分析了这些特征与内核数量之间的相关性.
主要成果:
- HTS减少了花数量,花体积和长度,同时增加了树枝数.
- 热应激加快了的降解,减少了花粉的重量,数量和活力.
- 每个尖峰的内核数量在HTS下显著下降,XY335的减少比ND372.
- 减少花粉数量/重量和尺寸被确定为HTS.的主要产量限制因素.
结论:
- 热应激显著损害了玉米的繁殖发育,导致玉米核数量和谷物产量减少.
- 与耐热的ND372.2相比,热敏品种XY335对体形态,花粉活力和表型表现出更明显的负面影响.
- 花粉的数量,花粉的重量和的结构完整性是热应激条件下玉米产量的关键决定因素.
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