| Abstrakt: |
Populus trinervis is native to China and plays an irreplaceable role in maintaining the ecological balance of boreal and temperate forests. P. trinervis mainly grows in high-altitude areas. At present, there are limited studies on the response of P. trinervis to different light qualities, so it is necessary to investigate the photosynthetic physiological changes of P. trinervis in different light environments. In our study, P. trinervis was grown for 8 months under light filtered by three different colored films. The three treatments were blue film, green film, and white plastic film. The effects of blue (B), green (G), and white (W) light on photosynthetic pigment content, absolute growth, photosynthetic parameters, soluble sugar content, and chlorophyll fluorescence parameters were studied, respectively. Compared to the W treatment, the chlorophyll a and b, carotenoids, total chlorophyll content (a+b), absolute growth of seedling height, net photosynthetic rate (PN), water use efficiency (WUE), total soluble sugars, sucrose, and nonphotochemical quenching (NPQ) of P. trinervis were significantly increased under B treatment. Meanwhile, chlorophyll a and b, carotenoids, total chlorophyll (a+b), transpiration rate (Tr), intercellular CO2 concentration (Ci), stomatal conductance (gs), absolute growth of seedling height and leaf length, reducing sugar, total soluble sugar content, and NPQ were significantly increased under G treatment. The results showed that the absolute growth and chlorophyll content of P. trinervis were increased under B light, while the sugar and photosynthetic parameters were increased under G light. Additional studies may look into how B light impacts absolute growth and promotional mechanisms, as well as how G light affects the accumulation of sugar levels. [ABSTRACT FROM AUTHOR] |
