蓝花丹的花部形态二态性及自交不亲和特性  

Distyly and selfing incompatibility of Plumbago auriculata

作　　者：张硕[1] 高素萍[1] 

机构地区：[1]四川农业大学风景园林学院,成都611130

出　　处：《广西植物》2014年第6期747-753,共7页Guihaia

基　　金：四川省科技支撑计划项目(2012FZ0083)

摘　　要：花部形态的二态性在异型自交不亲和中的作用一直颇具争议。为了探讨其对自交不亲和的作用,选择代表植物蓝花丹,观测其花部形态,利用激素调控其花柱高度,对调控后的花柱授粉,并分析结实率的变化。结果表明:(1)蓝花丹的花部形态在众多方面存在二态性;(2)IAA,NAA,GA在适宜的浓度都能调节其花柱的长度;(3)调节后的花柱自然和人工授粉,结实率与空白对照相比无显著差异。实验结果说明蓝花丹的花部形态有着典型的二态性特征,此特征是蓝花丹对花型间互补式雌雄异位的进化适应策略;而雌雄性器官的空间分布并没有通过影响合法花粉的有效传播而影响自交不亲和性;异型花的自交不亲和性更多地还是体现在生理机制上。The role of distyly in the heteromorphic selfing incompatibility is a controversial question.In order to di-cusse this question,we chose Plumbago auriculata as material,observed it floral morphs,regulated the height of styles,pollinate these style,and analyzed the fruit set.The results were as follows：（1）Significant differences were found in floral tube width,floral tube length,pistil height,stamen height,stigma length,anther width,stamen （L）and style （S）height.There was no significant difference in corolla width,petal length,calyx length,ovary diameter,an-ther length,stamen （S）and style （L）height.（2）Suitable IAA,NAA and GA could regulate the length of style;（3） There was no significant difference in fruit set of blank control and regulated style.There was typical dimorphism in the floral morphs of P .auriculata .It was an evolutionary adaptation strategy for reciprocal herkogamy in P .auricu-lata .The spatial distribution of sex-organ had absolutely no affect on incompatibility through the effective spread of legal pollen,and incompatibility of abnormal shape flower could be seen more clearly on physiological mechanism.

关 键 词：蓝花丹 自交不亲和 花部形态 花柱 二态性 

分 类 号：Q944.58[生物学—植物学]