Study On Reproductive Ecology Of Different Genetic Glycyrrhiza Uralensis

The characteristics of reproduction ecology for wild liquorice, semi-wild liquorice and cultivated liquorice had been studied in the west parts of Heilongjiang province by the principles and methods of reproduction ecology and population ecology. The results as follows:1. The sexual reproduction was lack to 3 years old cultivated liquorice that was in vegetative growth. The environment influenced the sexual reproduction of the wild liquorice, and the individual plant on the ground was in vegetative growth. The sexual reproduction of semi-wild liquorice was developed.2. The semi-wild liquorice was higher than cultivated liquorice and wild liquorice, the same to the quantities of compound leaf. There were plenty of stomata in the upper and lower epidermis, and the sunken stomata were anisocytic type. The density of stomata was distinctive in different genetic liquorices.3. The inflorescence distributed at the middle of stem, the bloom was aborted. The pollen grains were near round in shape and sprouted from three apertures. The anther cleaved in the lengthways direction. The ovules leaned after contacting with pollen by the viscous liquid that decreased the drought damage. The legume was curved.4. The seasonal variation of the biomass of compound leaf and stem changed lesser, but the biomass of compound leaf was more than the stem and branch-stem in numerical value. The trend to the biomass of compound leaf was from high to low to high in cultivated liquorice, which was opposite to the stem and branch-stem. The different trend of biomass in semi-wild liquorice rooted in the different individual-plant- and branch- type. The seasonal variation of biomass of compound leaf, stem and branch-stem resembled the cultivated liquorice. The abortion of inflorescence influenced the sexual reproduction to semi-wild liquorice. The reproductive allocation of semi-wild liquorice changed from decreasing to increasing.5. Seasonal variation of flavonoid was different in different genetic liquorices. The result was that the wild liquorice had more flavonoids than semi-wild liquorice and cultivated liquorice. The sequence of contents in flavonoids was inflorescence, leaflet, stem of leaf, stem and branch-stem. The content of flavonoids in the reproductive organs was the most. The seasonal variation resembled in three genetic liquorice, the decreasing in August and the increasing in September were associated with the propagation and the transportation of flavonoids in different organs.6. The anthophagous and herbivorous insects occurred simultaneously. The semi-wild liquorice aborted because the Mylabris calida destroyed the structure of bloom. The Pyrrhalta ate the compound leaf and destroyed the vegetative growth, which influenced the sexual reproduction indirectly. The serious degree of insect pest was that the wild liquorice was serious than semi-wild liquorice, than the cultivated liquorice.