SO2对农作物影响及敏感生理生化监测指标筛选

Effect of Sulfur Dioxide on Crop and Selection of Sensitive Monitoring Index

利用田间开顶式熏气装置对油菜、水稻、红薯3种农作物进行SO2急性伤害实验,研究不同浓度SO2对受试农作物生理生化指标的影响。结果表明:熏气可造成农作物的急性伤害,导致农作物生理生化指标发生大幅度变化。在熏气处理后,3种农作物的叶片含硫量、细胞膜透性均明显增加,与处理浓度存在显著线性正相关;可溶性蛋白含量明显降低,与处理浓度存在显著线性负相关;过氧化氢酶及超氧化物歧化酶活性与处理浓度没有显著相关性;可选择叶片含硫量、细胞膜透性、可溶性蛋白作为监测SO2对农作物急性伤害程度的敏感指标。

Rape greens,rice and sweet potatoes were selected to carry out acute injury experiment of sulfide dioxide using an open-top fumigation device.The experiment was to investigate the influence on the major physiological and biochemical indexes of the selected crops from diverse sulfide dioxide levels.The results showed that:fumigation could cause acute injury on the crops,and lead to a dramatic change of the physiological and biochemical indexes.The exposure dose of SO2 was positively correlated with sulfur content in plants,membrane permeability,but was strongly negatively correlated with the content of soluble protein.However,there is no linear relationship between the activities of catalase and superoxide dismutase and the SO2 exposure dose.Among the physiological and biochemical indexes,sulfur content in plants,membrane permeability and soluble protein could be selected as effective indexes to estimate the acute injury of crops caused by SO2.