Cu2+对水稻萌发及生理指标的影响

以常见农作物水稻为材料,在实验室条件下采用水培的方法,研究Cu2 单一污染对水稻种子的萌发及生理特性的影响.结果表明:低浓度的Cu2 对水稻生长没有明显的毒害,但随着浓度的增加,水稻受害症状比较明显。当Cu2 浓度由0增加到400 mg/L时,萌发率由对照组的43.3%降到22.2%,须根数由34个降到13个,主根长也由6.08 cm降到5.34 cm,严重影响根系的生理功能;chla和chlb的含量也显著下降,当Cu2 浓度为400 mg/L时,仅为对照组的45.1%和58.8%,影响了水稻的光合作用,而叶片的电导率显著上升,说明细胞膜的完整性和组成遭到破坏.

Effect of Cu2+ on sprouting and physiological index of Oryza sativa

Currently,heavy metal pollution grows more and more serious.In order to study its poisonous action to field crops,The effect on sprouting and physiological nature of Oryza sativa is studied under single Cu2 stress with Oryza sativa as material.The results showed that it is not obviously poisonous to gowth of Oryza sativa in lower Cu2 concentration,but poisonous symptom is obvious with the increase of Cu2 concentration.When Cu2 concentration increass from zero to 400mg/L,sprouting rate is reduced to 22.2% from 43.3% of control group,fibrous root number is reduced to 13 from 34,main root length is also reduced to 5.34 from 6.08,so this affects the function of root system seriously.When Cu2 concentration is 400 mg/L,chla and chlb content are only 45.1% and 58.8% of control group,but electric conductivity increass singnificantly,which also shows that cell membrane is damaged gravely.