松材线虫对黑松一些生理生化指标的影响（英文）

 松材线虫病是松树的一种毁灭性病害。本文对接种松材线虫后3~4年生黑松茎部的一些生理生化指标的变化进行了研究。结果显示，接种线虫后，松苗的可溶性糖含量降低，在病情发展中期和后期比早期降低更显著。松苗的可溶性蛋白质和抗坏血酸含量逐渐降低，游离氨基酸含量也降低。松树茎部的可溶性蛋白质含量可用于病害的早期诊断。此外，对这4个生理生化指标在病害致病机理中的作用进行了讨论。

Effects of pine wood nematode, Bursaphelenchus xylophilus, on some physio-biochemical indexes of Japanese black pine, Pinus thunbergii

Pine wilt caused by pine wood nematode, Bursaphelenchus xylophilus, is a serious disease for pines. In this paper, changes of some physio-biochemical indexes in stem of 3-4 years old Japanese black pine, Pinus thunbergii inoculated with B. xylophilus were studied. The results showed that after nematode invasion, the soluble carbohydrate in pine seedlings decreased, and it was more significant at the middle and late stages of disease development. The soluble protein and ascorbic acid in pine seedlings decreased gradually, and the free amino acid in pine seedlings also decreased. It was suggested that the content of soluble protein in stems of pine could be used for early diagnosis of the disease. Roles of the four physio-biochemical indexes in pathogenic mechanism of the disease were discussed.