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生物肥料减轻盐分压力:春小麦生理学和基因表达的见解

Halimah Al Khallaf^1,2, Hassan M Rashad¹, Hameed Alsamadany¹

¹Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.

Frontiers in plant science

|November 7, 2025

概括

生物肥料中的有益微生物显著改善小麦 (Triticum aestivum) 的盐度耐受性. 双谷物和根应用增强了生理特征和抗氧化防御,减轻了盐应激损害,以实现可持续农业.

科学领域:

农业科学农业科学
植物科学植物科学
微生物学微生物学

背景情况:

盐度压力是对全球作物生产率和粮食安全的重大威胁.
有益的微生物 (生物肥料) 显示出增强植物对非生物应激 (如盐度) 的耐受性的潜力.
需要可持续的战略来减轻小麦等作物的盐分损害.

研究的目的:

研究含有阿佐托巴克特和细菌物种的生物肥料在提高春季小麦 (Triticum aestivum) 盐应激耐受性的有效性.
评估不同生物肥料应用方法 (谷物处理和谷物加根处理) 对小麦在盐度下生理和生化反应的影响.
在生物肥料处理和盐度压力下分析关键盐度响应基因的表达.

主要方法:

春小麦经过四种盐度 (0-6000 ppm) 和三种处理:控制,谷物处理 (GT) 和谷物加根处理 (GRT).
生物肥料包括Azotobacter chroococcum,Bacillus megaterium和Bacillus circulans. 这些都是生物肥料.
测量了与耐压力相关的生理特征,生物化学标记,抗氧化酶活性和基因表达.

主要成果:

盐度压力显著降低了小麦的生长和生理参数,但生物肥料处理,特别是GRT,减轻了这些负面影响.
生物肥料改善了叶绿素含量,细胞膜稳定性和相对水含量,同时减少了氧化损伤标记物 (甲,过氧化).
抗氧化酶活动和应激基因 (例如TaCAT1,TaNHX2) 的表达被上调,表明强化了透调整,离子平衡和抗氧化剂防御机制.

结论:

生物肥料提供了一种环保和可持续的方法来提高小麦的盐分耐受性.
结合谷物和根应用 (GRT) 显示出最显著的益处,这表明双接种的协同效应.
这些发现突显了生物肥料在减轻盐引起的损害和改善作物在盐水环境中的弹性方面的潜力.

关键词:

这种细菌是Azotobacter chroococcum.细菌种类. 细菌种类.在PGPR的财团.抗氧化酶是一种抗氧化酶.用盐水灌的方式灌.应激反应的基因表达.

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