Photosynthetic Physiological Characteristics in Different Diameters of Stem Bark of Prinsepia utilis
Stem photosynthesis in plants efficiently captures and utilizes sunlight in the absence of leaves,providing an additional energy source that enables plants to better adapt to extreme environments.However,research on the photosynthetic characteristics of most plant stems remains limited.This study focuses on Prinsepia utilis,a plant spe-cies with green stems distributed in the southwestern region.We compared the photosynthetic characteristics and the variations in chlorophyll content of different stem diameters for the breeding and efficient cultivation of P.utilis and the results show that:(1)P.utilis stems possess strong photosynthetic capacity,which is significantly correlated with chlorophyll content;(2)There are variations in chlorophyll content and photosynthetic capacity among stems with different diameters.With increasing stem diameter,the chlorophyll content,net photosynthetic rate,light compensa-tion point,and light saturation point of P.utilis stems gradually decrease.However,the net photosynthetic rate of stems with different diameters of flat core wood is relatively high.It is speculated that the photosynthetic function of stems can help P.utilis complete the physiological process of flowering during the leafless period in early spring,and we therefore hypothesize that stem photosynthesis would improve the adaptation to extreme environments of P.utilis.
stem photosynthesisPrinsepia utilischlorophyll contentnet photosynthetic rateearly spring flowering
万方数据
维普
