大豆花叶病毒的侵染对大豆碳氨化合物代谢的影响

感染大豆花叶病毒（ＳＭＶ）的大豆在发病初期其叶片除还原糖以外，其它各类碳水化合物含量均下降，包括总糖，总可溶性糖、不溶性糖、非还原性糖、但总可溶性蛋白、总游离氨基酸均明显增加．这说明ＳＭＶ侵染明显地抑制了寄主碳水化合物代谢，但促进了寄主氮化合物代谢．因此ＳＭＶ侵染大豆后，在消耗碳水化合物的基础上，优先合成各类蛋白质、这有利于ＳＭＶ的复制．另外在感染ＳＭＶ的大豆中，还发现总氮量增加，这说明ＳＭＶ浸染刺激了寄主对氮的吸收并直接合成各种氨基酸，而有利于病毒的增殖．另一方面由于病毒的增殖不破坏寄主本身的蛋白质，所以氮吸收的增加对寄主起到一种保护作用。

EFFECT OF SMV-INFECTION ON METABOLISMS OF CARBON AND NITROGEN COMPOUNDS IN SOYBEAN

When soybcan was infected with soybean mosaic virus(SMV),concentrations of total nitrogen,total soluble protein and total free amino acid increased,whereas contents of carbohydrates included total sugar,total soluble sugar,insoluble sugar and non-reduced sugar decreased except reduced sugar.It is suggested that SMV-infcction inhibited metabolism of carbon compounds and promoted metabolism of nitrogen compounds.therefore it was considered that SMV-infected soybean had priority to synthesis proteins on the basis of consumption of sugar,which was favourable to virus replication.