文献类型： 外文期刊

作者： Ou Lijun ² ; Zhang Zhuqing ¹ ; Dai Xiongze ¹ ; Zou Xuexiao ¹ ;

作者机构： 1.Hunan Acad Agr Sci, Vegetable Inst, Changsha 410125, Hunan, Peoples R China

2.Huaihua Univ, Key Lab Hunan Prov Study & Utilizat Ethn Med Plan, Huaihua 418008, Hunan, Peoples R China

3.Huaihua Univ, Dept Life Sci, Huaihua 418008, Hunan, Peoples R China

关键词： alpha-amylase;chillies;cultivars;enzyme activity;enzymes;plant morphology;seed germination;seeds;Capsicum;Capsicum annuum;Capsicum;Solanaceae;Solanales;dicotyledons;angiosperms;Spermatophyta;plants;eukaryotes;cultivated varieties

期刊名称：PLANT SYSTEMATICS AND EVOLUTION （ 影响因子：1.631； 五年影响因子：1.704 ）

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收录情况： SCI

摘要： To illustrate the effects of domestication on wild pepper, we compared the seed micromorphology and germination characteristics of two wild pepper strains and their corresponding cultivars. The results showed that compared to their corresponding cultivars, wild pepper seeds are significantly smaller, have more groove and ridges on the surface, higher water imbibition rate, higher germination rate and higher alpha-amylase activity, and digest starch granules faster. The results indicate that the smaller wild seeds are easier to spread; more grooves and ridges on the surface and higher hilum ratio benefit their water imbibition, and rapid decomposition of starch granules and higher alpha-amylase activity are in favor to germination. By contrast, increased seed size will lead to a reduced germination rate and decreased adaptive ability to water environmental change. Thus, seed size is the result of natural and artificial selection, and whether larger seeds of various pepper cultivars are meaningful in evolution is debatable.