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在小麦中,Exiguobacterium aurantiacum SA100诱导抗氧化酶和盐分耐受性基因表达

Soheila Aghaei Dargiri¹, Shahram Naeimi¹, Ali Movahedi²

¹Department of Biological Control Research, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.

Physiologia plantarum

|May 3, 2025

概括

在盐度压力下,Exiguobacterium aurantiacum SA100可以促进小麦的生长. 这种细菌改善了发芽,生物质和离子平衡,同时调节了关键的盐耐受性基因.

科学领域:

农业微生物学农业微生物学
植物生理学植物生理学
生物技术是生物技术.

背景情况:

盐度压力对全球作物生产产生重大影响,特别是小麦 (Triticum aestivum).
制定减轻度压力的策略对于粮食安全至关重要.
植物相关细菌提供了一种可持续的方法来增强作物弹性.

研究的目的:

评估Exiguobacterium aurantiacum SA100作为在盐度压力下小麦的生物化剂的有效性.
研究在小麦中SA100介导的盐耐受性背后的生理和分子机制.

主要方法:

小麦种子被E. aurantiacum SA100处理,并接受不同度的NaCl (0,50,100,150毫米).
评估了种子发芽,根/芽的长度,生物质,抗氧化酶活动 (CAT,APX,POD,PPO),含量和氧化损伤标志物 (MDA,H2O2).
分析了主要盐耐受性和应激反应基因 (NAC7,NHX1,SOS1,GS1,DREB2,DHN13,WRKY32) 的离子含量 (K+,Mg++,Ca++,Na+) 和基因表达.

主要成果:

在所有盐度水平下,SA100显著改善了小麦发芽,生长参数和生物质,特别是在50和100毫米NaCl下.
使用SA100的注射增强了抗氧化剂防御系统,增加了总,并在150毫米盐度下减少了氧化损伤标志物.
SA100通过增加必不可少的离子和减少积累来调节离子平衡,同时改变关键的盐耐受性和应激反应基因的表达.

结论:

Exiguobacterium aurantiacum SA100有效地促进小麦的生长,并提高盐度耐受性.
SA100通过提高抗氧化能力,离子平衡和特定基因表达模式的调制,赋予了弹性.
E. aurantiacum SA100是一种有前途的生物化剂,用于盐水环境中的可持续农业.

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