新疆野核桃不同小叶数复叶构件生物量可塑性及分配规律

新疆野核桃的复叶常见有5小叶7、小叶和9小叶3种。通过大样本测量,分析了不同小叶数复叶的相对变异度随叶序增加而增大;对生小叶在生物量分配上具有对称性。3种复叶各构件生物量与复叶生物量的关系均可用直线方程定量刻画,各构件在复叶间和复叶内随叶序增加的变化过程,也可通过各方程的参数反映出来。生物量可塑性及分配规律。结果表明:新疆野核桃复叶为大头奇数羽状复叶,即随叶序增加,小叶生物量增大。3种复叶生物量差异显著;随小叶数增加,复叶和叶轴的生物量增大,但相同叶序小叶的生物量相对变小;小叶生物量的

Biomass Plasticity and Allocation Rules for Modules of Compound Leaves with a Different Number of Leaflets on Juglans cathayensis in Xinjiang

Compound leaves of Juglans cathayensis in Yili of Xinjiang typically have 5,7 or 9 leaflets.Biomass plasticity and its allocation rules for compound leaves with a different number of leaflets were analyzed by the measurement of large size samples.Results show that the compound leaves of J.cathayensis in Xinjiang are macrocephalic imparipinnate compound leaves,that is,biomass of leaflets increases with increasing number of phyllotaxy.There is a significant difference in biomass between the three types of compound leaves.The biomass of compound leaves and rachises increases with increasing number of leaflets,whereas the biomass of leaflets on the same phyllotaxy decreases relatively.The coefficient of variation of leaflet biomass increases with increasing number of phyllotaxy.Opposite leaflets possess the symmetry of biomass allocation.The relationships between module biomass and compound leaf biomass of the three types of compound leaves all could be described quantitatively by linear equations.The changing process of each module increasing with phyllotaxy between and within compound leaves could also be reflected by the parameters of each equation.