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杨树溃疡病菌（ Ｄｏｔｈｉｏｒｅｌｌａ ｇｒｅｇａｒｉａ） 及其菌丝体提取物和培养滤液都能诱导杨树细胞壁富含羟脯氨酸糖蛋白（ ＨＲＧＰ） 和木质素的积累，但其诱导的速度和强度在抗病树种和感病树种间有明显差异。毛白杨（ 抗病） 这２ 种物质不仅积累的速度快，且积累的幅度也远大于北京杨（ 感病） 。在病原菌侵染和诱导处理中，杨树细胞壁的ＨＲＧＰ 积累与木质素的沉积在积累的量上和时间进程上都明显相吻合。这在一定程度上表明ＨＲＧＰ 和木质素与杨树对溃疡病的抗性有关，是其抗病反应因素之一。
Dothiorella gregaria and its mycelium extract and culture filtrate all induced the accumulation of hydroxyproline-rich glycoprotein (HRGP) and lignin in poplar cell wall, but the induced rate and intensity of anti-poppy There are obvious differences between the diseased and susceptible species. Populus tomentosa (disease resistance) These two substances not only accumulate faster, and the accumulation rate is much larger than Beijing Yang (susceptible). In pathogen infection and induction treatment, poplar cell wall HRGP accumulation and deposition of lignin in the accumulation of volume and time course are obviously consistent. To a certain extent, this indicates that HRGP and lignin are related to the resistance of poplar to canker disease and is one of the factors of disease resistance.