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Title: Global variation in the fraction of leaf nitrogen allocated to photosynthesis
Authors: Luo, Xiangzhong 
Keenan, Trevor F.
Chen, Jing M.
Croft, Holly
Colin Prentice I.
Smith, Nicholas G.
Walker, Anthony P.
Wang, Han
Wang, Rong
Xu, Chonggang
Zhang, Yao
Issue Date: 11-Aug-2021
Publisher: Nature Research
Citation: Luo, Xiangzhong, Keenan, Trevor F., Chen, Jing M., Croft, Holly, Colin Prentice I., Smith, Nicholas G., Walker, Anthony P., Wang, Han, Wang, Rong, Xu, Chonggang, Zhang, Yao (2021-08-11). Global variation in the fraction of leaf nitrogen allocated to photosynthesis. Nature Communications 12 (1) : 4866. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Plants invest a considerable amount of leaf nitrogen in the photosynthetic enzyme ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCO), forming a strong coupling of nitrogen and photosynthetic capacity. Variability in the nitrogen-photosynthesis relationship indicates different nitrogen use strategies of plants (i.e., the fraction nitrogen allocated to RuBisCO; fLNR), however, the reason for this remains unclear as widely different nitrogen use strategies are adopted in photosynthesis models. Here, we use a comprehensive database of in situ observations, a remote sensing product of leaf chlorophyll and ancillary climate and soil data, to examine the global distribution in fLNR using a random forest model. We find global fLNR is 18.2 ± 6.2%, with its variation largely driven by negative dependence on leaf mass per area and positive dependence on leaf phosphorus. Some climate and soil factors (i.e., light, atmospheric dryness, soil pH, and sand) have considerable positive influences on fLNR regionally. This study provides insight into the nitrogen-photosynthesis relationship of plants globally and an improved understanding of the global distribution of photosynthetic potential. © 2021, The Author(s).
Source Title: Nature Communications
ISSN: 2041-1723
DOI: 10.1038/s41467-021-25163-9
Rights: Attribution 4.0 International
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