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Yuan Guo-Di, Liu Wen-Yao, Shi Xian-Meng, Fan Xiao-Yang. Effects of water content change on photosynthetic and fluorescence parameters of four bole epiphytic bryophytes in montane moist evergreen broad-leaved forest in the Ailao Mountains[J]. Plant Science Journal, 2018, 36(4): 603-611. DOI: 10.11913/PSJ.2095-0837.2018.40603
Citation: Yuan Guo-Di, Liu Wen-Yao, Shi Xian-Meng, Fan Xiao-Yang. Effects of water content change on photosynthetic and fluorescence parameters of four bole epiphytic bryophytes in montane moist evergreen broad-leaved forest in the Ailao Mountains[J]. Plant Science Journal, 2018, 36(4): 603-611. DOI: 10.11913/PSJ.2095-0837.2018.40603
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Effects of water content change on photosynthetic and fluorescence parameters of four bole epiphytic bryophytes in montane moist evergreen broad-leaved forest in the Ailao Mountains

  • 1. Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China;

  • 2. University of Chinese Academy of Sciences, Beijing 100049, China

Funds: 

This work was supported by grants from the National Natural Science Foundation of China (31770496), Biodiversity Conservation Strategy Program of Chinese Academy of Sciences (ZSSD-016), and "CAS 135 Program" (2017XTBG-T01).

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  • Received Date: January 24, 2018
  • Available Online: October 31, 2022
  • Published Date: August 27, 2018
    Graphical Abstract
    • Abstract
  • The water absorption capacity, water release, desiccation tolerance,stable carbon isotope (δ13C) values, and effects of water content change on photosynthetic and fluorescence parameters of four bole epiphytic bryophytes, Plagiochila assamica Steph., Homaliodendron montagneanum (Müll. Hal.) M. Fleisch., H. scalpellifolium (Mitt.) M. Fleisch., and Thuidium cymbifolium (Dozy et Molk.) Dozy et Molk., were investigated from the montane moist evergreen broad-leaved forest of the Ailao Mountains, Yunnan, China. Results showed that:(1) all species had high water absorption rates, low water-holding capacities, and strong desiccation tolerances, and all exhibited quick resilience after dehydration; (2) the δ13C values and water use efficiency of the four bryophytes were lower than those of vascular plants. Except for T. cymbifolium, the δ13C values and water use efficiency of the other three bryophytes in the rainy season were higher than those in the dry season; and (3) the net photosynthetic rates (Pn) of the four epiphytic bryophytes declined with decreasing water content. The maximum photochemical efficiency parameter (Fv/Fm) declined sharply under water content conditions of less than 60%~80%, indicating that the photosynthetic and fluorescence properties of the four bryophytes were very sensitive to moisture change.
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    • References (35)
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