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一种CYBDOM蛋白质会影响铁的稳态和原始根生长,在阿拉比多普西斯菌中缺乏酸盐的情况下,它会影响铁的稳态和原始根生长

Joaquín Clúa¹, Jonatan Montpetit¹, Pedro Jimenez-Sandoval¹

¹Department of Plant Molecular Biology, Biophore Building, University of Lausanne, 1015, Lausanne, Switzerland.

Nature communications

|January 11, 2024

概括

一种新型蛋白质,CRR,调节了Arabidopsis根中的铁减少和沉积,影响酸盐缺乏的情况下的生长. 这一发现揭示了铁平衡和植物应激反应的新机制.

科学领域:

植物生物学植物生物学
分子生物学分子生物学
生物化学生化学

背景情况:

酸盐缺乏会通过形铁 (Fe) 变化影响阿拉比多普西斯的根生长.
在根髓系统中沉积出无塑性Fe会触发髓系统的停止,并抑制细胞延长.

研究的目的:

描述一种新型CYBDOM蛋白家族成员CRR在铁稳态和植物发育中的作用.
调查CRR在调节无塑性铁沉积和根生长对酸盐缺乏反应中的作用.

主要方法:

对阿拉比多普西斯突变 (crr单个和crr hyp1双重突变) 和过度表达线的遗传分析.
在不同的酸盐和铁条件下评估初级根生长,简系统细胞分裂和可塑性Fe沉积.
测量发芽中铁的吸收和转移.

主要成果:

在低酸盐条件下,crr突变体表现出增强的根生长抑制,这是由于酸盐的增加和细胞分裂的减少导致的.
过度表达CRR可以防止apoplasticFe沉积,使根生长对低酸盐不敏感.
CRR参与铁的降解,并以阿斯酸盐依赖的方式控制无塑性铁沉积.
CRR影响铁耐受性;crr突变体对高Fe具有耐受性,而过度表达线是敏感的.

结论:

CRR是一种铁还原酶,对铁平衡和植物对非生物应激反应至关重要.
CYBDOM蛋白在植物的铁代谢和发育中起着重要的作用.
克里尔作为一个关键的调节器的apoplastic铁沉积,影响根的发展在营养压力下.

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