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草业科学  2014 

小花草玉梅花序水平上雌性适合度成分变化

DOI: 10.11829\j.issn.1001-0629.2013-0011, PP. 95-101

Keywords: 花序,雌性分配,小花草玉梅,权衡,位置效应

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Abstract:

?生活在高寒地区的植物究竟会采取何种繁殖对策来保障其雌性繁殖成功,已经引起了很多学者的关注。本研究通过野外调查采样对青藏高原东缘多年生草本植物小花草玉梅(Anemonerivularisvar.flore-minore)花序水平上不同级别枝条部位雌性适合度成分变异进行了研究。发现随着花从一级枝到三级枝开放的次序,小花草玉梅每花胚珠数和每果种子质量在不同生境中表现不同。每果种子数均以二级枝最高;每果单个种子质量由一级枝向三级枝显著降低(P<0.001);而结籽率和雌性分配均不依赖于花序枝级部位;各雌性适合度成分间均存在正相关关系。

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