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提高小麦对压力的耐受性通过莫林加叶提取物叶片应用提高小麦耐受性

Muhammad Hafeez Ul Rehman Khursheed¹, Muhammad Shahbaz¹, Tahrim Ramzan¹

¹Department of Botany University of Agriculture, Faisalabad 38040, Pakistan.

|October 8, 2024

概括

叶提取物 (MLE) 有效地减轻小麦中的 (Cd) 毒性,改善生长和生理功能. 3% MLE的叶子应用减少了小麦植物中的氧化应激和重金属积累.

科学领域:

环境科学环境科学
植物科学植物科学
农业科学农业科学

背景情况:

(Cd) 是一种在土壤和植物中发现的危险重金属,由于其在小麦等主食作物中积累,对人类健康构成重大风险.
小麦吸收和转移Cd从根到芽和谷物,增加饮食暴露和全球约60%的人口的健康问题.
莫林加叶提取物 (MLE) 显示出减轻植物重金属压力的潜力.

研究的目的:

在MLE的外部应用下,评估两个小麦品种 (Akbar-19和Dilkash-2020) 的Cd应激耐受性.
调查MLE叶子喷雾在减轻Cd毒性对小麦生长,生理和生物化学参数的负面影响方面的有效性.

主要方法:

小麦植物接受了不同的治疗:控制 (0% MLE, 0 μM Cd),仅使用MLE (3% MLE, 0 μM Cd),仅使用Cd压力 (0% MLE, 400 μM Cd) 和联合治疗 (3% MLE, 400 μM Cd).
测量了形态参数 (芽/根重量,长度,叶面积/数量),光合作用属性,氧化应激标记 (H2O2,MDA),抗氧化酶活性 (CAT,SOD,POD,AsA),有机氧化物 (,蛋白质,糖) 和离子含量 (Na+,Ca2+,K+,Cd).

主要成果:

应力显著降低了多达30.5%的形态属性,光合作用效率降低了69.8%.
毒性诱导了氧化应激,使H2O2和MDA增加了75%;而MLE应用提高了高达81.5%的抗氧化酶 (CAT,SOD,POD,AsA) 活动,并提高了77%的有机氧化物.
在Cd压力下,MLE治疗增加了35%的必需矿物离子 (Ca2+,K+) 的吸收,并分别减少了22%和44%的根内Na+和Cd的积累.

结论:

的毒性严重影响小麦的生长,光合作用和生物化学状态.
3%MLE的叶子应用有效地通过增强生长和生理参数来缓解Cd毒性.
MLE减轻了Cd诱导的氧化应激,并减少了小麦中和等有毒元素的吸收.

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