Table 1Representative rDNA ITS sequences， the length of rDNA ITS and the nucleotide similarity between reference sequences

    图4最大简约法构建的系统发育树

    Fig.4Phylogenetic analysis based on the rDNA ITS sequence data shows the relationships of 10 sequence types with reference taxa

    4讨论

    内生真菌在白木香叶中的侵染区域主要分布在髓部和韧皮部，这可能与韧皮部细胞中的营养物质比较丰富，有利于菌丝的生长有关。从另一角度来看，内生真菌与植物体是互惠共生关系，髓部、韧皮部细胞壁薄，可消化侵入的菌丝，为白木香的生长提供营养。真菌菌丝不是在整个横切面均匀分布 ......