论文部分内容阅读
淫羊藿为具有克隆生长习性的多年生根茎型草本植物,是重要的药用资源植物.该文以野生淫羊藿为研究材料,于营养生长期和有性生殖期对无性系分株种群进行取样,比较分析不同时期、不同构件生物量分配格局.结果表明,营养期与有性生殖期无性系分株种群生物量差异不显著,但各构件生物量百分比差异显著.营养期根生物量比(RMR)、支持结构生物量比(SBR)和根冠比(R/C)均大于有性生殖期;而叶生物量比(LMR)和叶重分数(LMF)小于有性生殖期.在有性生殖期,营养分株(VR)生物量(83.93%)远远大于生殖分株(RR)生物量(16.07%),用于生殖器官(花)的生物量投资比例非常小(1.45%),叶构件生物量分配比例(50.68%)最大,地下根茎(32.03%)和支持结构(15.84%)生物量分配比例次之.高比例的叶构件生物量有利于合成大量有机物质,这些物质储存于地下根茎中以维持基株在资源缺乏季节的生长,保证种群的生存和繁衍.这些都暗示着淫羊藿不仅有很强的克隆生长能力,而且采取克隆生长为主,有性繁殖为辅的手段维持种群的繁衍与扩散.
Epimedium is a perennial rhizomatous herbaceous plant with clonal growth habitat and is an important medicinal resource plant.In this paper, wild Epimedium was used as research material, and clonal ramets were cloned during vegetative and sexual reproduction The results showed that there was no significant difference in the biomass of clonal ramet population between vegetative and sexual reproductive climates, but the biomass percentage of each component was significantly different.The root biomass ratio RMR, SBR and R / C were all higher than those of sexual reproduction. However, leaf biomass ratio (LMR) and leaf weight fraction (LMF) were less than that of sexual reproduction. During sexual reproduction, the biomass of vegetative ramets (83.93%) was much larger than that of reproductive ratooning (16.07%) and the proportion of biomass used for reproductive organs (flowers) was very small (1.45% ), The biomass allocation rate of leaf components was the largest (50.68%), followed by that of underground rhizomes (32.03%) and support structure (15.84%), and the biomass of leaf components with high proportion was conducive to the synthesis of a large amount of organic substances Stored in underground rhizomes to maintain the growth of the plant in a season of scarce resources Survival and reproduction of the population. These are not only imply that Epimedium has a strong clonal growth capacity, and take the main means of clonal growth, sexual reproduction, supplemented by maintaining reproduction and dispersion of the population.