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Jian Zhan¹, Yifan Zhou², Linsheng Yang²

¹Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, 400716, PR China; College of Resources and Environment, Southwest University, Chongqing, 400716, PR China; Key Laboratory of Low-carbon Green Agriculture in Southwestern China, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400716, PR China.

Plant physiology and biochemistry : PPB

|August 12, 2025

概括

甘生长的最佳和酸盐比率是20/80,提高了使用效率 (NUE) 和C/N代谢. 含有高氨的比例会引起毒性,并通过破坏代谢过程来抑制生长.

科学领域:

农业科学农业科学
植物生理学植物生理学
生物化学生物化学

背景情况:

(N) 营养对植物生长至关重要,与酸盐的比率 (NH₄⁺/NO₃^--比率) 影响使用效率 (NUE).
甘是一种高生物质作物,需要优化的供应,但不同NH₄⁺/NO₃^--比例对其N和碳 (C) 代谢和生长的影响尚不清楚.

研究的目的:

为了确定最佳的NH₄⁺/NO₃^--比例用于甘生长和NUE.
为了研究不同NH₄⁺/NO₃^--比对甘中N和C代谢过程的影响.
阐明甘对不同N.形式的反应背后的分子和代谢调节机制.

主要方法:

用七个NH₄+/NO₃^--比率在恒定的总N供应 (10 mmol·L^{-1) 下进行了甘品种"云泽05-51"的水培实验.}
测量植物生长,与N相关的酶活动,并分析双重转录组和非向的代谢组概况.
评估基因表达,代谢物丰富度和与N和C代谢,光合作用和应激反应相关的代谢途径活性.

主要成果:

20/80的NH₄+/NO₃-比显著促进了甘的生长和NUE.
这种最佳的比率增强了酸盐减少酶和同化酶的活性,导致了平衡的C和N代谢.
高度 (≥4 mmol·L-1) 诱导毒性,降低光合作用和破坏蛋白质修饰,同时激活耐压路径.

结论:

在足够的供应下,甘生长的最佳NH+/NO比为20/80.
均衡的N同化和C/N代谢是最大限度地提高甘生长和NUE的关键.
了解植物对不同N形式的反应对于优化作物生产和减轻与N相关的毒性至关重要.

关键词:

氨的毒性氨的毒性氨与酸盐的比率多个omics的多个omics.吸收的同化方式甘是一种糖.

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