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树状菌根真菌可以减轻玉米中的压力

Qiqiang Kuang¹, Yujie Wu¹, Yamin Gao¹

¹State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, and College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China.

Ecotoxicology and environmental safety

|January 3, 2025

概括

树状菌根 (AM) 菌种保护玉米免受土壤 (Cd) 污染. 亚米共生增强了植物生长,营养吸收和抗氧化防御,减轻了Cd毒性和作物中的积累.

科学领域:

环境科学环境科学
植物科学植物科学
菌类学菌类学是指菌类学.

背景情况:

土壤 (Cd) 污染是影响粮食安全和人类健康的重大环境危害.
树状菌根菌 (AM) 菌在减轻作物中的重金属应激方面显示出潜力.
了解AM共生下的玉米耐受机制对于管理Cd污染的土壤至关重要.

研究的目的:

研究玉米基因型的耐受性机制,在AM共生下对比Cd耐受性.
评估AM共生对玉米生长,生理和Cd压力下的Cd积累的影响.
为了比较AM共生在缓解Cd毒性的Cd耐受性和Cd敏感性玉米基因型之间的有效性.

主要方法:

使用两种玉米基因型 (Zhengdan958 - Cd耐受,Zhongke11 - Cd敏感) 进行了与AM接种和不接种的Rhizobox实验.
应用 (Cd) 处理来评估其对植物生长,根部发育和生理参数的影响.
测量包括植物高度,茎直径,生物质,根形态,光合作用能力,营养吸收,抗氧化酶活性和根和芽中的Cd含量.

主要成果:

应激对两种基因型的玉米生长和根部发育都有负面影响.
在Cd压力下,AM共生显著改善了植物生长,根形态,光合作用能力和营养吸收.
AM共生增强了抗氧化酶活性和根Cd含量,同时降低了脂质过氧化和射击Cd积累,Cd敏感基因型 (Zhongke11) 的效果更为明显.

结论:

通过增强光合作用,营养摄取和抗氧化剂防御,AM共生减轻了玉米中的Cd毒性.
亚米共生调节Cd的运输和积累,提供对Cd应激的保护作用.
这些发现表明,将Cd耐受性玉米基因型与AM共生结合起来,是管理Cd污染土壤的有希望的策略.

关键词:

抗氧化剂是一种抗氧化剂.树枝状的菌根真菌菌的真菌.是的组成部分.基因型基因型基因型玉米玉米玉米是一种光合作用光合作用身体生理学身体生理学

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