云南油杉种子散布的生态适应特征研究

云南油杉(Keteleeria evelyniana Mast.)种子具翅,主要靠风传播.研究了云南油杉种子的形态特征(质量、长、宽等)和传播特征(种翅比例、滞空时间等),统计分析各特征的相关性,揭示种子散布的生态适应基础.结果表明:种子形态特征呈正态分布,各特征存在显著正相关;滞空时间受形态特征的综合影响;种子形态特征的变异是进化过程中形成的适应散布和繁殖更新的重要机制.

A study on the ecological adaptive characters related to the seeds dispersal in Keteleeria evelyniana

The winged-seeds of Keteleeria evelyniana spread by wind.To reveal the adaptability of seeds dispersal,the morphological characters of the seeds (weight,length,width,etc.) and its dispersal characters (proportion of the seed's wing,dropping time in the still air,etc.) were measured.The results showed:(1) Morphological characters were normally distributed,the weight and the length of the seeds and seeds' wings were positive correlated significantly;(2) Dropping time in the still air was affected comprehensively by the seed characters;(3) Morphological variation of the seeds was important to the seeds dispersal and population propagation in Keteleeria evelyniana Mast.