The structure and roles of sterile flowers in Viburnum macrocephalum f. keteleeri (Adoxaceae)
The structure and roles of sterile flowers in Viburnum macrocephalum f. keteleeri (Adoxaceae)
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荚蒾不育花的结构和作用。
DOI：
10.1111/j.1438-8677.2009.00298.x
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发表时间：
2010-11-01
期刊：
影响因子：
3.9
通讯作者：
Wang, Y. -L.
中科院分区：
文献类型：
--
作者：
Jin, B.;Wang, L.;Wang, Y. -L.
有花植物不育花的形成及其生态学作用是花生物学和进化研究中的热点问题。本文研究了大叶荚莲可育花和不育花的形态解剖学特征。油杉是一种自交不亲和的昆虫授粉灌木，在花的不同发育阶段。此外，传粉者的访问率和坐果率在完整的花序和不育花被删除。结果表明，不育花和可育花在早期发育阶段发育相似，开花前15天左右，花型发育出现分化。不育花花序的传粉者访花率、柱头上花粉粒数和坐果率均显著高于无不育花花序。结果表明，该物种的不育花从可育花在长期的选择压力下进化而来，并通过有效地吸引传粉者，从而提高坐果率，提高繁殖成功率发挥了至关重要的作用。
The formation and ecological roles of sterile flowers in flowering plants are interesting issues in floral biology and evolution. Here, we investigated the morphological and anatomical characteristics of both fertile and sterile flowers of Viburnum macrocephalum f. keteleeri, a self-incompatible and insect-pollinated shrub, during different developmental stages of flowers. In addition, pollinator visitation rates and fruit set were determined in intact inflorescences and those with sterile flowers removed. The results indicate that sterile and fertile flowers were developmentally similar during early developmental stages, and that development of the flower types diverged about 15 days before flowering. In addition, pollinator visitation rates, number of pollen grains on stigmas and fruit set were significantly higher in inflorescences with sterile flowers than those without sterile flowers. The results suggest that sterile flowers of this species evolved from fertile flowers under long-term selective pressure, and play a crucial role in enhancing reproductive success through effectively attracting pollinators to the plant and thus enhancing fruit set.