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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (24): 51-59.doi: 10.11924/j.issn.1000-6850.casb2023-0819

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Study on Leaf Anatomical Structure and Chlorophyll Fluorescence Characteristics of Seven Poplar Varieties at Seedling Stage

MIAO Tingting1(), WU Zhongneng1, LIU Junlong1(), DING Changjun2, CAO Zhihua1, SUN Hui1, YAN Caixia1   

  1. 1 Anhui Academy of Forestry, Hefei 230088
    2 Forestry Research Institute, Chinese Academy of Forestry, Beijing 100091
  • Received:2023-12-04 Revised:2024-05-18 Online:2024-08-20 Published:2024-08-20

Abstract:

In order to screen the fine poplar varieties with strong resistance and adaptability, seven poplar varieties were taken as the research objects in this paper. The growth, leaf anatomical structure and chlorophyll fluorescence physiological characteristics of poplar varieties were comprehensively and systematically studied. Using one-way ANOVA method, comparative analysis was conducted on the differences in various indicators among different varieties. Principal component analysis was used to comprehensively evaluate the ecological adaptability of seven poplar varieties at seedling stage. The results showed that: (1) there were significant differences in growth, chlorophyll content and chlorophyll fluorescence parameters among different poplar varieties. There were significant differences in the thickness of lower palisade tissue, upper epidermis, and relative thickness of upper epidermis in the leaf anatomical structure. Among them, ‘Xianglin 75’ and ‘Juba’ had higher chlorophyll content, as well as higher chlorophyll fluorescence parameters such as Y(II), ETR, qP and stronger photosynthetic capacity. ‘Jianghuai No.1’ had higher leaf thickness, well-developed lower palisade tissue and stronger drought resistance. (2) There was a correlation between leaf anatomical structure and chlorophyll fluorescence parameters, with a significant negative correlation between principal vein thickness and ETR, Y(II), and a significant positive correlation between palisade tissue, CTR and Fv/Fm. There was a correlation between chlorophyll content and chlorophyll fluorescence parameters, but did not reach a significant level. (3) The order of ecological adaptability of seven poplar varieties at seedling stage was ‘Xianglin 75’> ‘Juba’> ‘Xianglin 90’> ‘Xianglin 80’> ‘Jianghuai No.1’> ‘2025’> ‘Wanlin No.1’(CK). The results of this paper provided a reference basis for selecting suitable stress-resistant poplar varieties in the Jianghuai region of Anhui Province.

Key words: poplar, leaf anatomical structure, chlorophyll fluorescence characteristics, ecological adaptability, principal component analysis (pca), drought resistance