草甘膦对巴西橡胶树芽接苗叶片形态和生理指标的影响

Effects of Glyphosate on the Leaf Morphology and Physiological Indices of Grafted Seedling of Hevea brasiliensis Müll. Arg.

以橡胶树品系CATAS7-33-97的芽接苗为材料,研究草甘膦对其叶片形态和生理活性的影响。结果表明：喷施草甘膦导致橡胶树叶片脱落后,引起整蓬新生叶片变长、扭曲。该蓬新生叶片稳定后,下一蓬新生叶片形状会部分恢复。叶片畸形与含水量变化无关,但会导致叶绿体结构变化、过氧化物酶和超氧化物歧化酶活性增加13%~40%、可溶性糖含量下降47%~81%和脯氨酸含量上升15%~389%。

Glyphosate, a nonselective herbicide, can damage plants when inappropriate used. In this study, for the first time with rubber tree clone CATAS7-33-97 grafting seedlings as materials, we studied the effects of glyphosate on the leaf morphology and physiological indices of rubber tree. Results showed that the glyphosate caused rubber tree leaf fall, new-grown leaves twist and longer leaves. After these change stabilized, the new-grown leaves would be normal. The leaf doformity had nothing to do with water content, but could result in the change of chloroplast structure, increase peroxidase and superoxide dismutase enzyme activities from 13%-40%, cut down the content of soluble sugar from 47%-81% and increase oroline content from 15%-389%.