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烟草感染丛枝病病原后表现为典型的矮化丛枝症状．供试烟草品种Ｋ３２６以烟蚜为媒介，成功接种丛枝病病原后，分析病株与健株中与生长素（ＩＡＡ）代谢相关的锌元素含量；ＩＡＡ氧化、过氧化物酶的活性及同功酶变化，同时对抗感病相关的苯丙烷代谢关键酶苯丙氨酸氨裂解酶（ＰＡＬ）和植株解除Ｈ２Ｏ２毒害相关的过氧化氢酶活性进行测定．结果表明：感病烟株代谢发生了显著的变化，病株中锌含量降低、ＩＡＡ氧化及过氧化物酶活性增强且在聚丙烯酰胺凝胶电泳图谱上它们的同功酶谱带多于健株，ＰＡＬ的活性随接种时间的延长先升后降；过氧化氢酶的活性显著下降．另据测定，病株叶绿素含量减少而可溶性糖含量增高．
Tobacco infected witches broom disease pathogen showed typical dwarf bush symptoms. The tested tobacco variety K326 was infected with Myzus persicae and successfully analyzed the pathogen content of auxin (IAA) in diseased plants and healthy plants after inoculation of the pathogen of cucumber aphid. The activities of IAA oxidation and peroxidase In addition, the enzyme activity was also tested against the phenylalanine ammonia-lyase (PAL), a key enzyme responsible for the susceptibility to phenylephrine, and the catalase (CAT) activity related to the detoxification of H2O2 in plants. The results showed that there was a significant change in the metabolism of susceptible tobacco plants, the zinc content in the diseased plants decreased, the IAA oxidation and peroxidase activities were enhanced and their zymogram bands were more on polyacrylamide gel electrophoresis The activity of PAL and PAL increased firstly and then decreased with the prolongation of inoculation time; the activity of catalase decreased significantly. According to another determination, the diseased plant chlorophyll content decreased soluble sugar content increased.