不同生境与花部特征对巫山淫羊藿结实特性的影响

对不同生境中巫山淫羊藿结实特性进行比较研究。结果表明:(1)三个种群在繁殖时期中不同花部特征的植株繁殖投资差异不大,如每株分枝数、每株花序数和每株开花数差异均不显著;(2)三个种群中每株结实数、每株结实率、每花序结实数在不同花部特征中差异显著,PLS和SAA要显著大于PESS;(3)三种花部特征在不同生境中单株分枝数和单株花序数均无显著差异。在不同花部特征中种群1开花数量相较少,因而在结实方面均值均要小于种群2和种群3;(4)不同花部特征的果实饱满种子数、败育数和败育率均具有显著差异,而种子数差异不大,但在种群间均无显著的差异。说明种子的多少更多地受到花部特征的影响。总之,巫山淫羊藿的结实特性受到生境和花部特征的双重影响,其中花型比生境对巫山淫羊藿结实特性的影响更为明显。

sup>Effect of different habitats and floral characteristics on fruit set in Epimedium wushanense

The survey of the fruit-setting characteristics of E. wushanense revealed in the three habitats were as follows:(1)the resource and reproduction of floral characteristics had no difference among the three habitats,eg. No significant differences of branches per plant,inflorescences number per plant and flowers per plant weas observed among the three habitats;(2)Fruit-setting number per plant, Fruit-setting rate per plant and fruit setting rate per inflorescence of PLS and SAA were remarkably higher than the PESS;(3)The branches per plant and inflorescences number per plant of three floral characteristics had no difference in three habitats. The flowers per plant and fruit set of Population 1 was less than the other populations;(4)The full seed per fruit,percentage of seeds abortion per fruit and number of seeds abortion per fruit were significant different in three floral characteristics,but among the population,which revealed the seeds per fruit had been affected more by floral characteristics. The result suggested that the seed setting characteristics of E. wushanense were affected by its flower types and habitats and more by the latter.