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- W219951491 abstract "【Objective】 The paper studied the quality and shape of the diaspores of 43 plant species involving 13 seeds and 30 fruits from alpine meadow in the source region of three rivers.【Method】 The diaspores of 43 species were quantified,shapes of them were scaled with variance of three dimensions,and the relations between above indexes and ecological characteristics of diaspores were analyzed.【Result】 The results show that the quality of a single diaspore of 15 species is less than 1 mg,and its shape is close to sphericity because of variance less than 0.09,and it might have persistent soil seed bank,and is able to adapt to disturbance.The diaspores of perennials are heavier,flatter and longer than those of annuals.The diaspores of forb are heavier,and those of herbages are flatter and longer.Seeds are closer to sphericity in comparison with fruits.The diaspores of most of Compositae and Gramineae and Sedges species are flat and elongated because the variance is more than 0.09.The appendages of diaspores play an important role in dispersal and establishment.The diaspores of 75% Compositae species have pappuses,and might be dispersed by wind easily.And the diaspores of 89% Gramineae species have awns which make them not likely to be dispersed.【Conclusion】 The quality and shape of the diaspores of 43 species are different,which affect the survival strategy of species to a great extent." @default.
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- W219951491 date "2009-01-01" @default.
- W219951491 modified "2023-09-25" @default.
- W219951491 title "A comparative study on diaspore quality and shape of 43 plant species at the alpine meadow in the source region of three rivers." @default.
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