五味子花芽分化临界期不同枝类的光合特性研究

摘要

Photosynthetic Characteristics of phyllome branches and long vegetative shoot functional leaves in different Schisandrachinensis (Tur-cz)Baill strains were studied using gas exchange analysis system (CIRAS -1)during critical period of flower bud differentiation .The results showed that photosynthetic capacity of phyllome branches was higher than long vegetative shoot .Hence ,reason that quality of flower bud differ-entiation in phyllome branches was lower may be high nutrition competition from fruits but not the photosynthetic capacity of phyllome -branch-es leaves .%在五味子花芽分化临界期，以五味子不同品系的结果叶丛枝和长营养枝功能叶片为试材，采用CIRAS －1便携式光合系统测定气体交换参数。结果表明，五味子花芽分化临界期，结果叶丛枝叶片较长营养枝叶片具有较强的光合作用能力。说明结果叶丛枝芽分化花芽质量差的原因不是由叶片本身的光合能力造成的，其原因可能在于果实较强的营养竞争。