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[Study on geographical variation of morphologic and germination characteristic of different Glycyrrhiza uralensis provenance seeds].

OBJECTIVE
To study the geographical variation of morphologic and germination characteristic of different Glycyrrhiza uralensis provenance seeds, approach the geographical variation mode and ecology mechanism, and laid theoretical foundation for districting and allocating of G. uralensis seeds.


METHOD
Field investigation and laboratory analysis were applied. Seed shape and kilosseed weight were sampled randomly, germination rate germination force by general methods.


RESULT
The morphologic characteristic of G. uralensis seeds showed roughly longitude variation tendency that the seeds increased gradually from west to east. While the germination characteristic showed roughly altitude variation tendency that the seeds germination rate and germination force increased with the increase of the altitude, and the average germination rate was the same with the seeds morphologic characteristic. The results of analysis correlated with the climatic factors show that the morphologic characteristic of G. uralensis was positive correlated with annual rain-fall of the habitat, and the germination rate was quickened by drought, high temperature and strong sunshine.


CONCLUSION
The morphologic and germination characteristic and of G. uralensis seeds present distinguished geographical variation, and the formation of the variation was related to the ecological environment in which the seed provenance adapted.