紫藤和凌霄花的输水结构与水流速度的初步研究

A Preliminary Study on the Water Transport Structures and Water Flow Velocity of Wistaria Sinensis and Campsis Chinensis

用热脉冲技术,测定了2种藤本植物紫藤(Wistaria Sinensis)和凌霄花(Campsis Chinensis)茎干的液流速度。对两种植物的输水结构进行了解剖学研究,结果表明,两种植物一天中的液流速度变化小,维持在较高速度值上,径向液流速最大值的位点均位于靠近形成层的区域。二者输水结构也表现出了相似的特征,两树种的液流速度与其解剖结构有密切的关系。

The heat pulse technique was applied to the study of the water flow velocity of Wistaria Sinensis and Campsis Chinensis. The water transport structures of the two plants were studied by means of wood anatomical method. The results showed that: there were little changes of water flow velocity of the two plants, the two species with higher volume all the day. The relative point at which maximum sapflow velocity occurred in cambium. There were similar characteristics in the water transport structures of the two plants. There were close relationship between sapflow velocity and anatomical structures of xylem.