外源性应用的酸可通过调节抗氧化活性和与防御相关的基因表达来减轻玉米中的毒性
Saghir Abbas1, Farwa Basit2,3, Kashif Tanwir1
1Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan.
Physiologia plantarum
|August 24, 2023
概括
酸 (SNP) 通过减少的吸收和增强抗氧化防御来减轻玉米中的 (Ni) 植物毒性. SNP的应用促进了植物生长,生物质和光合作用,这表明其在Ni污染土壤中的作物潜力.
科学领域:
- 植物生理学 植物生理学
- 环境毒理学环境毒理学
- 农业科学 农业科学
背景情况:
- (Ni) 污染对作物生产和粮食安全构成重大威胁,因为它损害了植物生长和生物质.
- 了解植物应对Ni引起的压力的机制,对于制定缓解策略至关重要.
- 玉米 (Zea mays) 是一种易受重金属毒性的重要作物,需要对保护剂进行研究.
研究的目的:
- 调查化 (SNP) 在减轻玉米中诱导的植物毒性的作用.
- 阐明玉米植物在Ni压力下接受SNP处理时使用的潜在防御机制.
- 评估SNP对Ni压力玉米生长,光合作用,氧化应激和基因表达的影响.
主要方法:
- 玉米幼苗受到 (Ni) 压力,其中一些被外源性酸 (SNP) 处理.
- 测量包括植物生长参数,生物质积累,光合作用属性 (Fv/Fm,Fm,qP,ETR,ΦPSII),Ni含量,抗氧化酶活性 (SOD,CAT,GPX),非酶性抗氧化剂 (,黄),氧化应激标志物 (MDA,H2O2),有机氧化物 (glycine betaine),有机酸和基因表达.
- 还评估了离子交换能力和ATPase活动 (Ca2+-ATPase,Mg2+-ATPase).
主要成果:
- 通过减少吸收和转移,SNP处理显著改善了压下的玉米生长,生物质和光合作用效率.
- SNP增强了酶和非酶抗氧化剂防御,减少了氧化损伤标志物,增加了糖氨酸贝含量和GST活性.
- 此外,SNP的应用还改善了ATP水平和离子交换能力,同时降低了有机酸的产生,并提高了与防御和排毒相关的基因的调节.
结论:
- 酸 (SNP) 通过增强抗氧化剂系统和改善生理功能,有效地减轻玉米中的 (Ni) 植物毒性.
- SNP通过多方面的方法提高了植物对Ni压力的耐受性,包括减少金属吸收,改善营养状况和调节基因表达.
- 作为一种保护剂,SNP在污染的农业土壤中增强作物弹性和产量.
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