广西喀斯特地区两种四季开花金花茶的繁殖策略及其进化意义

金花茶组（Camellia, Sect. Chrysantha Chang）植物是世界珍稀的观赏植物和培育茶花新品种的珍贵种质资源。该组植物一般在冬季或春季开花，花期约3个月。崇左金花茶（Camellia chuongtsoensis）和毛籽金花茶（C. ptilosperma）是该组植物中仅有的四季开花且盛花期在夏季的类群，其长花期对生殖特性的影响，以及长花期对喀斯特生境的适应机制还不了解。为此，本项目拟对两种四季开花金花茶的繁殖策略进行研究，旨在弄清两种金花茶开花物候特征及其对生殖成功的影响、不同花期繁育系统和传粉生物学特性的变化、以及不同花期结实对子代适合度和种群幼苗更新的影响，为深入认识两种四季开花金花茶的生态适应机理，丰富和发展生活史进化理论提供科学依据，同时也为喀斯特地区两种濒危金花茶物种的保护和种群恢复提供参考。

Camellia, Sect. Chrysantha Chang are rare ornamental plants in the world and precious germplasm resource for cultivating new varieties of camellia. This group usually bloom in winter or spring, with a flowering period about 3 months. Camellia chuongtsoensis and C. ptilosperma are the only perpetual flowering species with peak flowering in summer of Sect. Chrysantha Chang. The effect of long flowering period on reproductive characteristics and the adaptation mechanism of long flowering period to karst environment in this two species are not understood. Therefore, this project plans to study the propagation strategies of the two perpetual flowering yellow camellias, aiming to find out the flowering phenological characteristics of this two species and their influence on reproductive success, the changes of breeding system and pollination biological characteristics in different flowering periods, and the influence of seed setting in different flowering periods on the offspring fitness and population seedling renewal. These studies can provide scientific basis for further understanding the ecological adaptation mechanism of the two perpetual flowering yellow camellias, enriching and developing the theory of life history evolution, and also provide reference for the protection and population restoration of the two endangered yellow camellia species in karst area.