通过对不同种泡桐叶片内总酚和氨基酸含量变化的研究 ,发现健康植株叶片的酚含量皆比感病植株叶片内的高 ,其变化水平随植物种类不同而有一定的差异 ;在所分析的台湾泡桐和楸叶泡桐氨基酸中 ,只有胱氨酸和苯丙氨酸表现出随叶片感病程度的加深 ,呈现出的变化趋势相同 ,即胱氨酸的含量随叶片感病程度的加深逐渐增多 ,而苯丙氨酸的含量则逐渐减少。这些变化可能与泡桐丛枝病的发生有某种联系。 Through the study on the changes of total phenolic and amino acid contents in leaves of different species of Paulownia, it was found that the content of phenol in the leaves of healthy plants was higher than that in the leaves of susceptible plants, and the variation level was different with plant species. Among the amino acids of Paulownia tomentosa and Populus tomentosa, only the contents of cystine and phenylalanine showed the same trend as the susceptible leaves, showing the same trend, that is, the content of cystine gradually increased with the deepening of the susceptibility of leaves , While the content of phenylalanine decreased gradually. These changes may have some connection with the occurrence of Paulownia witches broom disease.