一年生龙胆属植物的繁殖分配及其花大小、数量的权衡关系研究

Studies on reproductive allocation,floral size and its trade-off with floral number of annual Gentiana

对青藏高原东缘高寒草甸一年生龙胆属植物的花期繁殖分配及其花大小与数量间权衡关系的研究发现,1)个体越大,繁殖投入越高;2)繁殖分配与个体大小间无固定的相关模式,表明不同物种对相似环境压力的适应对策不同;3)花大小和总花数均随个体增大而增加,花数量的增加要比花大小的增加更加显著;4)在采用偏相关方法控制植物个体大小后,花大小与花数目之间表现出权衡关系,与理论预测一致。

The reproductive allocation and the trade-off between flower size and flower number of five annual plants of Gentiana in Eastern Qinghai-Tibet Plateau Alpine Meadow were studied. 1） The mass of reproductive structure increased significantly with increasing individual size; 2）There was not certain correlation between reproductive allocation and size of individuals, which suggest species-specific adaptive strategies; 3）Both floral display size and total flower production are in remarkably than flower size; 4）The trade-off trolling for plant size statistically. This resul creasing with between total plant size, and the flower number is increasing more flower production and flower size is exist after con t confirms the theory predicts.