Seed germination ecology of three submerged macropbytes in Dianshan Lake

Abstract

Abstract: In this paper, the.relationship between the germination of 3 submerged macrophytes inDianshan Lake and their seed coat, water temperature and substrate is studied under controlled condition.The results show that seed germination is controlled by the structure ofseed coat.When the seed coat is cracked, the germination rate and its speed are increased.Water temperature also plays an important role in promoting germination.Maximum germination can be occured at 20℃, but the speed of germination is increased withincreasing temperature.The optimum substrate for germination of Vallisneria spiralis and Potamogeton crispus is water plus soil, and that for Najas marina is soil.In water, thegermination rate and its speed are the lowest.

Key words: Submerged macrophyte, Germination rate, Germination speed, Whole seed, Cracked seed, gene expression, reactive oxygen, ozone, Ginkgo biloba

You Wenhui, Song Yongchang . Seed germination ecology of three submerged macropbytes in Dianshan Lake[J]. Chinese Journal of Applied Ecology, 1995, 6(2): 196-200.

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