A comparative study on seed weight,shape and germination characteristics of 7 Artemisia species

Abstract

Abstract: A laboratory study was made on seed weight,shape and germination characteristics of 7 Artemisia species (A.halodendron,A.wudanica,A.sacrorum,A.sieversiana,A.scoparia,A. lavandulaefolia Afrigida).Seeds of A.wudanica and A.halodendron,pioneer species in sandy land,were big and not round,which was one of the mechnisms of species adapted to drift sand.Seed of A.scoporia was small and round,which means that this species perhaps has the persistent soil seed bank,which explained the reason that A.scoporia has more strong anti-disturbing ability.There were 3 germination patterns of 7 Artemisia species: germination pattern of A.sieversiana,A.sacrorum,A.halodendron and A.frigida were rapid in the early stage and slow in the later stage,respectively.A.lavandulaefolia and A.scoparia were slow in the whole germination course.A.wudanica was slow in the early and later stages,but rapid in the middle stage.A.wudanica delayed the peak emergence of germination rate,which was its mechnism of more adaptablity in drift land than A.halodendron.Accordirg to the germination pattern,seed dormancy or post-mature was the strategy of in A.scoporia,while opportunism was the strategy of A.sieversiana.Germination of A.scoparia,A.lavandulaefolia and A.frigida had the mechanism of share survival risks.Seed weight and shape had no relationship to the germination percentage.But seed weight was significantly positively related to seed shape.

Key words: ComGIS, Landscape pattern, Landscape monitoring, Management information system

CLC Number:

Q948.1

LI Xuehua, LIU Zhimin, JIANG Deming, LI Xiaolan, YAN Qiaoling. A comparative study on seed weight,shape and germination characteristics of 7 Artemisia species[J]. cje, 2004, (5): 57-60.

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