烟草与TMV不同互作体系中部分生理指标的测定

测定了烟草与TMV强毒株系的亲和性互作以及与TMV弱毒株系的非亲和性互作体系中部分生理指标。结果表明：（1）两种互作体系的SOD活性均明显升高，后者活性变化高于前者；在互作的早期，接种叶SOD活性明显高于非接种的上，下部邻位叶，然而非亲和性互作的后期，上部叶SOD活性上升更快，活性反而超过接种叶。（2）两种互作体系CAT活性均升高，在非亲和性互作的早期，CAT活性显著高于亲和性互作，但在互作的3d后，前者活性反而低于后者；两种互作体系中的接种叶CAT活性在互作的前3d均高于上，下部叶，然而在亲和性互作的后期，上部叶CAT活性反而明显高于接种叶和下部叶。（3）两种互作体系中的POD活性均升高，非亲和性互作POD活性变化亦大于亲和性互作；互作早期的接种叶POD活性高于上，下部叶，然而非亲和性互作的上部叶POD活性很快地反超接种叶。（4）亲和性互作的后期，随着病害症状的显现，3种酶活性均再次升高，直至病情稳定。

Survey on Some Physiological Characters in Two Kinds of Interaction Systems between Tobacco and TMV

Physiological characters in two kinds of interactions systems including compatible system between the tobacco and TMV and incompatible system between the tobacco and the weak strain in pathogenicity from TMV were surveyed.Results indicated that SOD activities rose obviously in above two kinds of interaction systems and the activity of the latter was higher than that of the former .Moreover,there were higher SOD activities in inoculated leaves than in non inoculated leaves including the upper and the down leaf during the primary stage of interaction,but in the final stage of the incompatible interaction,SOD activity of the upper leaf increased so quickly as to exceed that of the inoculated leaf .CAT activities from two interaction systems were elevated in the course of interaction ,and CAT activity at the initial stage of incompatible interaction was remarkably greater than the compatible one,but the former in activity was inversely lower than the latter.In addition, the inoculated leaf had the higher CAT activity in the former three days than the upper and down leaves non inoculated.However,CAT activity of the upper leaf at the later stage of the compatible interaction was inversely higher than the inoculated leaf and the down leaf.Whether in incompatible or in compatible interaction ,POD activities were all elevated ,and the raised range of the former was larger than the latter. In the same way ,although there was a higher POD activity in inoculated leaf in the early period of interaction than in the upper and down leaves ,POD activity in the upper leaf in incompatible interaction exceeded rapidly the inoculated leaf. Along with the disease symptom appearing at the later stage of compatible interaction,activities of SOD,CAT and POD all went up once more.