水稻植株防御白背飞虱为害的某些生理反应

 以对白背飞虱具有不同抗性水平的水稻品种(组合) 为材料, 研究了水稻在白背飞虱为害后稻株体内的生理变化。结果表明, 稻株受害后, 感虫品种(TN1和汕优63) 光合作用速率和叶绿素含量下降比抗虫品种(N 22) 明显; 感虫品种超氧化物歧化酶(SOD) 活性增加, 过氧化物酶(POD) 和过氧化氢酶(CAT) 活性下降, 而抗虫品种POD 和SOD 均增加, CAT减少;感虫品种除丙氨酸含量下降外, 其他氨基酸含量均上升, 尤其是天门冬氨酸、苏氨酸、缬氨酸及蛋氨酸等含量增加很快, 抗虫品种中天门冬氨酸、缬氨酸等含量增加也很快, 但苏氨酸、蛋氨酸、丙氨酸的含量显著下降。

Some Physiological Changes of Rice Plants Infested by the White-Backed Planthopper, Sogatella furcifera

Physiological response of riceplants infested by the white-backed planthopper(Sogatella furcifera)(WBPH) was carriedout. The results showed that after rice plants were infested by WBPH, photosynthesis rateand chlorophyll contents in leaves of susceptible rice varieties (TN1 and Shanyou 63)declined obviously compared to those of resistant rice variety (N22); activity ofsuperoxide dismutase (SOD) increased and of catalase(CAT) and peroxidase (POD) decreasedin susceptible rice varieties, but activity of SOD and POD went up, CAT went down inresistant rice variety N22. In the body of susceptible rice varieties, except for Ala,other free amino acid contents increased, especially Asp, Thr, Val, Met increased rapidly.In resistant rice variety, contents of Asp, Val also increased obviously, but ones of Thr,Met and Ala decreased significantly.