摘要
在粗柄独尾草(Eremurus inderiensis(M.Bieb)Regel)自然居群中通过人工给水、人工去叶等处理,同时人为地将其花序轴上的小花等长度分为基部、中部和顶部小花。以花粉活力、柱头可授性、昆虫访花行为及结果率、结种率为指标,探讨粗柄独尾草胚珠败育的败育格局及可能的影响因素。结果表明:粗柄独尾草从花序轴基部到顶部结果率、结种率依次降低;沙土水分含量的增加有利于促进粗柄独尾草的结果及结种;小年龄植株的结果率及结种率明显较低;牛羊对植株叶片的啃食也显著降低了粗柄独尾草的结果率与结种率。
In natural populations of Eremurus inderiensis （M.Bieb） Regel,artificial water supply and defoliation were conducted.According to the positions of the flowers,the flowers on inflorescence axis were divided into three parts,basal,middle and top flowers.Pollen viability,stigma receptivity,insect foraging behavior and fruit-setting,seed-setting rates were investigated.Ovule abortion patterns and its possible causes were discussed.The results showed that fruit-setting and seed-setting rates were decreased in turn from the base to the top along the axis ;increasing of sandy soil moisture content improved pollen viability,stigma receptivity,fruitsetting and seed-setting rates of Eremurus inderiensis;pollen viability,stigma receptivity,fruit-setting and seedsetting rates of small and defoliated plants was significant lower than large and undefoliated plants.
出处
《种子》
CSCD
北大核心
2014年第3期4-8,共5页
Seed
基金
国家自然科学基金资助项目(编号:30960028)
关键词
粗柄独尾草
花粉活力
柱头可授性
传粉昆虫
结果率
结种率
胚珠败育
Eremurus inderiensis （M.Bieb） Regel
pollen vitality
stigma receptivity
pollination insect
fruit-setting rate
seed-setting rate
ovule abortion
