%A ZHAO Zhi - Wei           %T Study on the Relationships between Vesicular Arbuscular Mycorrhiza and the Systematic Evolution of Pteridophyte %0 Journal Article %D 2000 %J Plant Diversity %R %P 1-3 %V 22 %N 04 %U {https://journal.kib.ac.cn/CN/abstract/article_32543.shtml} %8 2000-08-25 %X The mycorrhizal states of 256 species of pteridophytes which are naturally distributed in the tropi-cal and subtropical areas of Yunnan (Southwest China) were surveyed . It was found that the percentage of vesicular arbuscular mycotrophic associated with pteridophytes are lower than the angiospenns. The evolu-tionary trend offilicineae may be from rnvcotrophism to facultative mycotrophism, and at last to autotrophism.