Open Access

ARTICLE

Effects of Different Light Qualities on the Growth Characteristics of Populus trinervis

by Jiaqi Li^1,2, Zhensheng Qiao^1,2, Dan Zong^1,2, Chengzhong He^1,2,3,*

1 Key Laboratory for Forest Genetics and Tree Improvement and Propagation in Universities of Yunnan Province, Southwest Forestry University, Kunming, China
2 Key Laboratory of Biodiversity Conservation in Southwest China, State Forestry Administration, Southwest Forestry University, Kunming, China
3 Key Laboratory for Forestry Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, China

* Corresponding Author: Chengzhong He. Email:

(This article belongs to the Special Issue: Abiotic Stress Impacts on Plant Physiology and Their Alleviation)

Phyton-International Journal of Experimental Botany 2024, 93(5), 1043-1056. https://doi.org/10.32604/phyton.2024.050637

Received 12 February 2024; Accepted 11 April 2024; Issue published 28 May 2024

Abstract

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 (P), 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 CO concentration (C), stomatal conductance (g), 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.

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