长期暴露于臭氧会影响小麦在关键生长阶段的移动
Clare Brewster1, Nathalie Fenner2, Felicity Hayes3
1UK Centre for Ecology & Hydrology, Environment Centre Wales, Bangor, Wales, UK; Bangor University, School of Natural Sciences, Bangor, Wales, UK.
The Science of the total environment
|November 4, 2023
概括
高臭氧加快小麦衰老,增加剩余,减少的重新调动. 在合成时进行额外的肥,可以减轻臭氧对气动态的影响.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 环境科学 环境科学
背景情况:
- 的动态,衰老和光合作用对于小麦谷物填充至关重要.
- 臭氧对小麦中代谢在解毒后的影响尚未完全理解.
研究的目的:
- 调查慢性臭氧暴露对小麦中储存,转移和衰老的影响.
- 评估肥时间对小麦气动态中臭氧诱导的变化的影响.
主要方法:
- 在小麦 (cv. 天) 暴露于不同度的臭氧 (30-85ppb) 和肥率 (140-160公斤/ha-1).
- 测量包括老化,叶绿素含量,植物含量,C:N比率和重调动效率.
- 使用稳定同位素 (15N) 追踪来追踪转位.
主要成果:
- 臭氧暴露加速了叶子衰老,并降低了老叶子中的叶绿素含量.
- 高臭氧增加了收获时的剩余,并降低了重调节效率.
- 增强的肥在合成部分抵消了臭氧对含量和转移的负面影响.
结论:
- 臭氧对小麦的动力学产生负面影响,导致剩余的增加和重新调动的减少.
- 肥时间是减轻小麦臭氧损伤的潜在策略.
- 这些发现为预测臭氧对小麦产量影响的模型提供了信息.
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