Improved photosynthesis by leaf nutrient content enhances water use efficiency in Juniperus tibetica along elevation gradients above 4000 m a.s.l
| Autor: | Richard I. Milne, Georg Miehe, Tsam Ju, Wentao Wang, Kangshan Mao, Jialiang Li, Wenjing Tao, Lei Chen |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Plant growth leaf carbon isotopic composition water use efficiency Ecology biology Elevation Climate change Plant Science Photosynthesis biology.organism_classification Juniperus tibetica 010603 evolutionary biology 01 natural sciences Nutrient content elevation gradients leaf oxygen isotopic composition Agronomy Environmental science functional traits Water-use efficiency Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
| Zdroj: | Tao, W, Ju, T, Milne, R, Miehe, G, Wang, W, Li, J, Chen, L & Mao, K 2021, ' Improved photosynthesis by leaf nutrient content enhances water use efficiency in Juniperus tibetica along elevation gradients above 4000 m a.s.l. ', Plant Ecology and Diversity . https://doi.org/10.1080/17550874.2021.1933232 |
| DOI: | 10.6084/m9.figshare.14637795 |
| Popis: | Leaf functional traits can influence the ability of plants to grow when facing stresses. Climate changes can impose fundamental impacts on plant growth, especially at high mountains. Yet little is known about relationships between leaf functional traits and elevations in tree species above 4000 m a.s.l. Our objective was to investigate and compare the trend in water use efficiency (WUE) in the Tibetan juniper (Juniperus tibetica) along elevation gradients under different climate conditions, and by presenting evidence from leaf functional traits, to simultaneously clarify the underlying mechanisms. We investigated various leaf functional traits, i.e. leaf carbon (��13C) and oxygen (��18O) isotopic composition, leaf N and P concentration and specific leaf area (SLA) in J. tibetica, a dominant tree species of the treeline, along elevation gradients at three study sites between 4150 and 4950 m a.s.l. in the Qinghai-Tibet Plateau. As elevation increased, leaf ��13C, used as a proxy for WUE, increased, whereas leaf ��18Odecreased in J. tibetica. Leaf Narea also increased with elevation. We deduced that increasing WUE with elevation was due to enhanced photosynthetic capacity at all three study sites, and increased Narea may enhance photosynthesis and hence WUE. |
| Databáze: | OpenAIRE |
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