VAM fungi increased canker tolerance of poplars by promoting the uptake of water and nutrients(mainly phosphorus), which in turn increased the growth and vigor of trees.

• VAM真菌提高杨树抗溃疡病的机制为 :VAM真菌通过与杨树的共生 ,从而改善杨树营养和水分状况 ,促进杨树对水分和养分 (主要是磷 )的吸收 ,增强树势 ,间接地提高杨树对溃病的耐病性。