Abstract: Variations of endogenous hormone contents in bulbs of both Lycoris radiata and Lycoris chinensis in different growth and development stages were studied with enzyme linked immunosorbent assay（ELSA）,the relationship between endogenous hormone and growth and developmen of two Lycoris plants were analyzed. The results showed the IAA content of two plants was low, but the contents of iPAs,ABA and GAs were high during the fruit bud differentiation stage. With the coming of florescence, the IAA content increased, while the contents of iPAs,ZRs,ABA and GAs fell to extremum. During florescence the contents of ABA,GAs and ZRs increased, this suggested the increasing of ABA and GAs contents played a stimulative role in the flowering of two plants, but the role in the growth of their leaves was not obvious. Relatively high ZRs/IAA, GAs/IAA and ABA/GAs ratios were beneficial for their floweral differentiation, while moderately decreasing of three ratios did the same for leaves growth.

Key words: Lycoris radiata, L.chinensis, endogenous hormone, growth and development