宁夏地区肉苁蓉人工栽培居群生殖分配规律的初步研究

Preliminary study of reproductive allocation in Cistanche deserticola

目的:探讨肉苁蓉生殖期营养生长与生殖生长的权衡关系。方法:采用大样本取样,每株按照营养构件与生殖构件分开,分析各构件数量特征及生殖分配格局。结果:各数量性状均具有较大的表型可塑性;各阶段生殖分配一直呈上升趋势;个体越大,生殖投入越大,而生殖分配越小;种子质量与株高、总生物量、营养生物量、生殖生物量、果数、果实重都呈极显著的正相关。结论:肉苁蓉个体表现出明显的表型可塑性,是多种复杂因素综合作用的结果。在营养生长向生殖生长转化的过程中,生物量分配在各器官间相互权衡。个体生物量分配的变化是植物自身协调分配的结果,蕴涵着植物生长的调节策略。

Objective： Discuss the trade-off between vegetative growth and reproductive growth. Method： Vegetative modules and reproductive modules by large sampling were separated and quantitative charecters of organs and pattern of reproductive allocation were analysed of reproductive allocation were analysed. Result： The phenotype plasticity of quantitative charecters were significant. Reproductive biomass was increasing at different stages. The mass of reproductive investment increased significantly with increasing individual size, the opposite of reproductive allocation. There were all significant positive correlations between the seeds weight and height, total biomass, vegetative biomass, reproductive biomass, fruit numbers, fruit weight. Conclusion： The significance of phenotype plasticity is the cause of multiple elements. In the process of transferring from vegetative growth to reproductive growth, there was a trade-off between organs. Under individual growth and reproductive strategy, the variation of biomass was allocated coordinately.