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NIN-LIKE PROTEIN3.2 抑制抑制剂Aux/IAA14的表达,并增强在低气条件下的玉米苗木的根生物量

Ruifeng Wang¹, Yanting Zhong¹, Jienan Han²

¹State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.

|June 25, 2024

概括

在低的环境下,玉米的根生长受到NIN-LIKE PROTEIN3.2 (ZmNLP3.2) 和AUXIN/INDOLE-3-ACETIC ACID14 (ZmAux/IAA14) 的调节. 通过抑制ZmAux/IAA14,ZmNLP3.2通过抑制ZmAux/IAA14对根生物质产生积极影响,揭示了一个关键的调节模块.

科学领域:

植物生物学植物生物学
分子遗传学分子遗传学
农业科学农业科学

背景情况:

植物在低 (LN) 条件下增强根生长以吸收营养.
短期LN介导根生长调节的机制尚未完全理解.
酸盐信号通路对于植物适应营养的可用性至关重要.

研究的目的:

阐明在短期低条件下控制玉米根生物质的分子机制.
为了确定关键的基因和相互作用,涉及到有限的根部发育.
研究NIN-LIKE PROTEIN3.2 (ZmNLP3.2) 在调节根架构中的作用.

主要方法:

全基因组关联研究 (GWAS) 和玉米的单双型分析.
转基因玉米谱系的表型化,具有改变的ZmNLP3.2和ZmAux/IAA14表达.
在体外和体外分子测试以确定基因相互作用和转录调节.

主要成果:

酸盐信号元件ZmNLP3.2与在LN下玉米根生物质的自然变化有关.
ZmNLP3.2负调节ZmAux/IAA14的转录,这是根干重 (RDW) 的负调节器.
ZmNLP3.2与ZmARF19相互作用,削弱ZmARF19对ZmAux/IAA14的激活,从而促进根生物质的积累.

结论:

一个新的ZmNLP3.2-ZmARF19-ZmAux/IAA14调控模块在限下控制玉米根生物质.
这条路径突出了植物用来适应营养稀缺的复杂分子机制.
结果提供了关于提高作物使用效率和产量潜力的见解.

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