Geographic patterns of leaf functional traits and environmental drivers of national key protected wild plant <i>Davidia involucrata</i> Baillon

Song Shuaishuai; Wu Hao; Lü Linyu; Xiao Zhiqiang; Yang Teng; Shi Hongwen; Wei Xinzeng

doi:10.11913/PSJ.2095-0837.23112

Plant Science Journal > 2024 > 42(2): 160-169. > DOI: 10.11913/PSJ.2095-0837.23112 CSTR: 32231.14.PSJ.2095-0837.23112

Song SS，Wu H，Lü LY，Xiao ZQ，Yang T，Shi HW，Wei XZ. Geographic patterns of leaf functional traits and environmental drivers of national key protected wild plant Davidia involucrata Baillon[J]. Plant Science Journal，2024，42（2）：160−169. DOI: 10.11913/PSJ.2095-0837.23112

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Geographic patterns of leaf functional traits and environmental drivers of national key protected wild plant Davidia involucrata Baillon

Song Shuaishuai^{1, 2, 3, 4,},
Wu Hao^{3, 4},
Lü Linyu⁵,
Xiao Zhiqiang^{6, 7},
Yang Teng⁸,
Shi Hongwen⁹,
Wei Xinzeng^{3, 4, ,}

1.
Research Center for Ecology and Environment of Qinghai-Tibetan Plateau, Tibet University, Lhasa 850000, China
2.
College of Science, Tibet University, Lhasa 850000, China
3.
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
4.
University of Chinese Academy of Sciences, Beijing 100049, China
5.
Zhejiang Huadong Forestry Engineering Consulting and Design Corporation, Hangzhou 310019, China
6.
Center for Yangtze River Biological Diversity, China Three Gorges Corporation, Wuhan 430010, China
7.
National Engineering Research Center of Eco-Environment Protection for Yangtze River Economic Belt, Beijing 100038, China
8.
Wuhan Forestry Investigation, Planning Design Institute, Wuhan 430023, China
9.
Wuhan Institute of Landscape Architecture, Wuhan 430081, China

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Received Date: April 17, 2023
Accepted Date: May 31, 2023
Available Online: June 24, 2023

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Abstract

Abstract

The geographical patterns of plant functional traits and their environmental drivers remain central questions in plant population ecology. Leaf functional traits can directly affect the physiological and biochemical processes of plants, reflecting resource acquisition strategies and adaptation mechanisms. In this paper, we measured 17 functional traits of 18 populations of the national key protected wild plant Davidia involucrata Baillon across its natural distribution range in China, and analyzed the geographical patterns of leaf functional traits and their adaptation mechanisms to heterogeneous environments. At the local scale, the coefficients of variation of leaf traits ranged from 1.48% to 24.81%. The variation degree in the leaf carbon phosphorus ratio was the largest, while the variation degree of leaf organic carbon content was the smallest. With increasing longitude and latitude, leaf area, thickness, and serration number decreased significantly. With increasing altitude, leaf thickness, dry matter content, area, and phosphorus content increased significantly, while leaf shape became wider and rounder. Leaf serration enhanced the adaptability of D. involucrata leaves to cold. Significant leaf trait-geography correlations were mediated by climatic and/or soil factors. Environmental factors explained 79.90% of the variation in D. involucrata leaf traits, with variation of leaf traits mainly driven by geographical variables, climatic factors, and soil factors. Annual precipitation and soil nitrogen content were the strongest explanatory factors for leaf trait variation, with increasing precipitation or decreasing soil nitrogen leading to smaller and thinner leaves. In general, the functional traits of D. involucrata leaves showed a clear pattern at the species distribution scale, with precipitation and soil nitrogen content playing an important role in the formation of geographical patterns.
- Davidia involucrata,
- Leaf traits,
- Environmental factors,
- Phenotypic variation,
- Protected plant

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References

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Geographic patterns of leaf functional traits and environmental drivers of national key protected wild plant Davidia involucrata Baillon