PDF(Pubmed)
Abstract：
Gradual pollen presentation is a plant reproductive mechanism to improve pollination efficiency and accuracy and promote outcrossing. Vaccinium corymbosum \'Bluecrop\' has a typical gradual pollen presentation mechanism. \'Bluecrop\' exhibits an inverted bell-shaped flower with a white coloration. By investigating the flower syndrome, pollination characteristics, pollination efficiency, and breeding system of \'Bluecrop\', this study aims to explore the adaptive significance of these traits. The results showed \'Bluecrop\' released pollen gradually through anther poricidal dehiscence. Among different pollinators, Apis mellifera and Bombus can pollinate effectively, and the mechanism of gradual pollen presentation significantly improved the efficiency of pollen transfer. This characteristic limits the amount of pollen removed by the pollinators and prolongs pollen presentation, thus attracting more pollinators and thereby increasing male fitness. The nectar secretion of \'Bluecrop\' is gradual, with a large nectar production and a long phase of nectar secretion, enhance visitation frequencies and the chances of successful pollination. At the same time, campanulate corolla can protect pollen as well as nectar from waste due to environmental factors and other effects. The breeding system of \'Bluecrop\' relies mainly on outcrossing because of its low affinity for self-fertilization and good interaction with pollinating insects. Thus, the special floral syndrome and the mechanism of secondary pollen presentation are significant in improving pollination efficiency and promoting the reproductive success of \'Bluecrop\' by outcrossing. It can provide a certain theoretical basis for the future propagation breeding of \'Bluecrop\'.
摘要：
花粉渐变呈现是提高授粉效率和准确性并促进异交的植物生殖机制。乌梅草具有典型的渐变花粉呈递机制。“Bluecrop”展示了白色的倒置钟形花朵。通过调查花综合征，授粉特性,授粉效率，和“Bluecrop”的繁殖系统，本研究旨在探讨这些性状的适应性意义。结果表明，“Bluecrop”通过花药的杀生开裂逐渐释放花粉。在不同的传粉者中，Apismellifera和Bombus可以有效授粉，花粉逐渐呈现的机制显著提高了花粉转移效率。这种特征限制了传粉者去除的花粉量并延长了花粉的呈现。从而吸引更多的传粉者，从而增加男性健康。“Bluecrop”的花蜜分泌是渐进的，有大量的花蜜产量和长时间的花蜜分泌，提高访问频率和成功授粉的机会。同时,钟状花冠可以保护花粉和花蜜免受环境因素和其他影响的浪费。“Bluecrop”的繁殖系统主要依靠异交，因为它对自体受精的亲和力低，并且与授粉昆虫的相互作用良好。因此，特殊的花综合征和二次花粉出现的机制对提高授粉效率和通过异交促进“Bluecrop”的繁殖成功具有重要意义。为今后"蓝藻"的繁殖育种提供一定的理论依据。
