叶子中的酸三利用量由整个植物的水槽-来源比率和大米中的预算来调节
Zhenxiang Zhou1, Zichang Zhang1,2, Peter E L van der Putten1
1Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University & Research, PO Box 430, 6700 AK Wageningen, The Netherlands.
Journal of experimental botany
|August 29, 2023
概括
酸利用率 (TPU) 在大米叶中的限制受含量和整个植物碳需求的影响. 较高的和改变的沉源动态影响了氨基酸出口和二氧化碳吸收.
科学领域:
- 生物化学 生物化学
- 植物生理学 植物生理学
- 农业科学 农业科学
背景情况:
- 三酸利用率 (TPU) 反映了叶子中的碳沉积源平衡.
- 限制TPU可以通过光呼吸相关的氨基酸出口来增强CO2吸收.
- 整个植物因素对TPU的影响仍然不太清楚.
研究的目的:
- 调查整个植物的水槽-来源关系和 (N) 预算如何调节米的叶片水平三酸利用率 (TPU) 限制.
- 为了确定叶子N含量,水槽需求和碳代谢之间的相互作用.
主要方法:
- 来自大米植物的气体交换数据的模型分析.
- 在三个增长阶段进行的测量,在不同的N级别下进行.
- 水源比率通过皮剪切和遗传变异 (黄叶) 来操纵.
- 光合作用测量在向和向叶面上.
主要成果:
- 较高的叶子N含量与较低细胞间CO2度的TPU限制相关.
- 与光吸相关的氨基酸出口在高N的叶子中更大.
- 氨基酸出口减少了黄色叶子基因型,形修剪植物和轴测量.
- 皮切割不能始终抑制TPU,可能是由于阻断了N重新调动.
结论:
- 叶子水平的TPU限制受到整个植物沉源动态和米粒填充期间的N预算的显著调节.
- 叶子内部和整个植物的下水槽限制之间存在密切联系.
- 了解这些相互作用对于优化大米产量和碳同化至关重要.
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