南方红豆杉种子生物学特性研究

目的]研究南方红豆杉种子的形态特征和萌发特性。方法]以当年采收的南方红豆杉种子为试材，通过测定其形态指标、生活力及发芽力分析了其形态特征和萌发特性。结果]种子呈坚果状，紫褐色，先端有突起的短钝尖头，种脐呈椭圆形。种子长为3．78～5．84mm，直径为3．84～5.86min，平均含水量为8．5％，千粒重为65．048g。种子由种皮、种胚和胚乳构成，种皮重量占完整种子重量的51．83％。新鲜南方红豆杉种子的种胚长约1．3～1．9mm。有生活力种子的比例为77％，无生活力和空粒种子的比例分别为21％和2％。层积8个月后，200mg／L赤霉素溶液浸泡处理的种子发芽率最高，达71．8％；流水处理的种子发芽率次之，为61．5％；自然层积处理的种子发芽率最低。f结论]南方红豆彩种子具有一定的侏眠特性．赤垂素浸泡时箕萌发有明显的促进作用．

Study on the Biological Characteristics of Taxus chinensis var.mairei Seeds

Objective] The purpose was to study the morphological characters and germination characteristics of Taxus chinensis var.mairei seeds.Method] With mairei seeds harvested in the current year as tested materials,their morphological characters and germination characteristics were analyzed through measuring their morphological indices,vitalities and germination ability.Result] The seeds were puce and pyreniform,had excrescent,short and blunt acrocephalia on their tops and their hila were oval shape.The length...