@article{ZHANG2025, 
author = {Manman ZHANG and Conghui ZHENG and Ran SUN and Zhenhua XU and Kejiu DU},
title = {Comparison of leaf traits and photosynthetic characteristics of different genotypes of Ailanthus altissima var. erythrocarpa},
year = {2025},
journal = {Journal of Central South University of Forestry & Technology},
volume = {45},
number = {11},
pages = {28-41},
keywords = {Ailanthus altissima var. erythrocarpa, genotype, environmental factors, photosynthetic characteristics, correlation analysis},
url = {https://www.sciopen.com/article/10.14067/j.cnki.1673-923x.2025.11.004},
doi = {10.14067/j.cnki.1673-923x.2025.11.004},
abstract = {【Objective】By exploring the correlation between photosynthetic characteristics and environmental factors of different genotypes of Ailanthus altissima var. erythrocarpa, a theoretical basis is provided for the breeding of excellent new varieties of Ailanthus altissima var. erythrocarpa.【Method】In this study, Ailanthus altissima (control: CK), leaf area, specific leaf weight, photosynthetic pigment and net photosynthetic rate of leaves of different genotypes (‘P1’‘P10’, Ailanthus altissima ‘Liaohong’) were determined systematically, and the correlation between photosynthetic characteristics and environmental factors such as photosynthetically active radiation, temperature, humidity and CO2 content were analyzed.【Result】1) There were significant differences only in dry matter content of ‘P1’‘P10’, Ailanthus altissima ‘Liaohong’and CK (P < 0.05). The leaf area, specific leaf weight and dry matter content of ‘P1’ and ‘P10’ were significantly lower than those of’ Ailanthus altissima ‘Liaohong’ and CK (P < 0.05), and the leaf water content was significantly higher than that of Ailanthus altissima ‘Liaohong’and CK (P < 0.05); 2) The contents of photosynthetic pigments in ‘P10’ were significantly lower than those in ‘P1’, Ailanthus altissima ‘Liaohong’ and CK (P < 0.05); The pigment content of ‘P1’ was not significantly different from that of Ailanthus altissima ‘Liaohong’ and CK; 3) The daily net photosynthetic rate (Pn) of different genotypes in June was affected by high temperature (> 40 ℃), and the photosynthetic rate was lower than 3.688 μmol·m-2·s-1. In different months, Pn, Gs and Ci of ‘P1’ are higher, Tr, Ls, LUE and WUE of ‘P1’ and ‘P10’ are similar; PAR and Ta had greater influence on Pn of different Ailanthus altissima var. erythrocarpa, while RH and Ca had less influence on Pn. Among the physiological factors, Pn was positively correlated with Gs, and negatively correlated with Ci. The daily Pn change of ‘P1’ has a relatively large correlation with Tr, but a small correlation with Ca.【Conclusion】Under high temperature and high radiation environment in summer, the water content of ‘P1’ and ‘P10’ leaves was significantly higher than that of Ailanthus altissima ‘Liaohong’ and CK, and their photosynthesis was limited by non-stomatal factors. PAR and Ta had the greatest influence on Pn of different Ailanthus altissima var. erythrocarpa. When Ta was greater than 40 ℃, Pn and Ta showed an extremely significant negative correlation, Pn remained at a low level, and the leaf damage was not obvious, suggesting that Ailanthus altissima var. erythrocarpa had a certain tolerance to high temperature and radiation. When Ta was less than 40 ℃, the Pn of ‘P1’ and ‘P10’ showed a significant positive correlation with PAR, and the Pn of ‘P1’ and ‘P10’ had no significant difference with that of Ailanthus altissima ‘Liaohong’ and CK, and had the same photosynthetic performance.}
}