火柴头（Commelina benghalensis）实生植株资源配置及繁殖代价

火柴头具有地上和地下生殖枝开花结实的特性,产生地上大、小种子和地下大、小种子4种不同类型的种子.对4种类型种子实生植株的研究表明,4种类型种子实生植株个体水平上对新种群的贡献具有差异,地上大种子表现为最大,地下小种子则最小;4种类型种子实生植株在资源的繁殖配置上存在着差异,大种子尤其地上大种子对有性繁殖的资源分配最大,而地下小种子最小,这种差异又决定了在繁殖投资和繁殖代价上的差异,小种子特别是地下小种子实生植株的繁殖投资最小,而大种子特别是地上大种子实生植株的繁殖投资最大;从繁殖代价来看,大种子实生植株的繁殖代价之间差异不显著,而大种子实生植株的繁殖代价显著小于小种子实生植株的,地上小种子实生植株的繁殖代价显著小于地下小种子实生植株的.

Resource allocation and reproductive cost of plants from four types of seedlings of Commelina benghalensis

Plants of Commelina benghalensis L. can produce four types of seeds, overground large(OL) seeds, overground small(OS) seeds, underground large(UL) seeds and underground small(US) seeds. Studies on these four types of plants showed results as follows: in contribution to new generation of individual plant, OL made the most while UL made the least, in reproductive allocation, plants from OL had most resource allocation to sexual reproduction yet UL had the least, which caused differences in reproductive effort and reproductive cost among four types of plants. Plants from UL had the least reproductive effort yet OL had the most. Reproductive costs of plants from large seeds were significantly less than those of plants from small seeds, and reproductive costs of plants from OS were also significantly less than those of plants from US, but differences between two types of large seeds were not significant.