UV radiation is the primary factor driving the variation in leaf phenolics across Chinese grasslands

NWIPB OpenIR

	UV radiation is the primary factor driving the variation in leaf phenolics across Chinese grasslands
	Chen, Litong ; Niu, Kechang ; Wu, Yi ; Geng, Yan ; Mi, Zhaorong ; Flynn, Dan F. B. ; He, Jin-Sheng ; He, JS (reprint author), Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, 23 Xinning Rd, Xining 810008, Peoples R China.
	2013-11-01
发表期刊	ECOLOGY AND EVOLUTION ; Chen, LT; Niu, KC; Wu, Y; Geng, Y; Mi, ZR; Flynn, DFB; He, JS.UV radiation is the primary factor driving the variation in leaf phenolics across Chinese grasslands,ECOLOGY AND EVOLUTION,2013,3(14):4696-4710
摘要	Due to the role leaf phenolics in defending against ultraviolet B (UVB) under previously controlled conditions, we hypothesize that ultraviolet radiation (UVR) could be a primary factor driving the variation in leaf phenolics in plants over a large geographic scale. We measured leaf total phenolics, ultraviolet-absorbing compounds (UVAC), and corresponding leaf N, P, and specific leaf area (SLA) in 151 common species. These species were from 84 sites across the Tibetan Plateau and Inner Mongolian grasslands of China with contrasting UVR (354 vs. 161mW/cm(2) on average). Overall, leaf phenolics and UVAC were all significantly higher on the Tibetan Plateau than in the Inner Mongolian grasslands, independent of phylogenetic relationships between species. Regression analyses showed that the variation in leaf phenolics was strongly affected by climatic factors, particularly UVR, and soil attributes across all sites. Structural equation modeling (SEM) identified the primary role of UVR in determining leaf phenolic concentrations, after accounting for colinearities with altitude, climatic, and edaphic factors. In addition, phenolics correlated positively with UVAC and SLA, and negatively with leaf N and N: P. These relationships were steeper in the lower-elevation Inner Mongolian than on the Tibetan Plateau grasslands. Our data support that the variation in leaf phenolics is controlled mainly by UV radiation, implying high leaf phenolics facilitates the adaptation of plants to strong irradiation via its UV-screening and/or antioxidation functions, particularly on the Tibetan Plateau. Importantly, our results also suggest that leaf phenolics may influence on vegetation attributes and indirectly affect ecosystem processes by covarying with leaf functional traits.; Due to the role leaf phenolics in defending against ultraviolet B (UVB) under previously controlled conditions, we hypothesize that ultraviolet radiation (UVR) could be a primary factor driving the variation in leaf phenolics in plants over a large geographic scale. We measured leaf total phenolics, ultraviolet-absorbing compounds (UVAC), and corresponding leaf N, P, and specific leaf area (SLA) in 151 common species. These species were from 84 sites across the Tibetan Plateau and Inner Mongolian grasslands of China with contrasting UVR (354 vs. 161mW/cm(2) on average). Overall, leaf phenolics and UVAC were all significantly higher on the Tibetan Plateau than in the Inner Mongolian grasslands, independent of phylogenetic relationships between species. Regression analyses showed that the variation in leaf phenolics was strongly affected by climatic factors, particularly UVR, and soil attributes across all sites. Structural equation modeling (SEM) identified the primary role of UVR in determining leaf phenolic concentrations, after accounting for colinearities with altitude, climatic, and edaphic factors. In addition, phenolics correlated positively with UVAC and SLA, and negatively with leaf N and N: P. These relationships were steeper in the lower-elevation Inner Mongolian than on the Tibetan Plateau grasslands. Our data support that the variation in leaf phenolics is controlled mainly by UV radiation, implying high leaf phenolics facilitates the adaptation of plants to strong irradiation via its UV-screening and/or antioxidation functions, particularly on the Tibetan Plateau. Importantly, our results also suggest that leaf phenolics may influence on vegetation attributes and indirectly affect ecosystem processes by covarying with leaf functional traits.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/57399
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Chen, Litong,Niu, Kechang,Wu, Yi,et al. UV radiation is the primary factor driving the variation in leaf phenolics across Chinese grasslands[J]. ECOLOGY AND EVOLUTION, Chen, LT; Niu, KC; Wu, Y; Geng, Y; Mi, ZR; Flynn, DFB; He, JS.UV radiation is the primary factor driving the variation in leaf phenolics across Chinese grasslands,ECOLOGY AND EVOLUTION,2013,3(14):4696-4710,2013.
APA	Chen, Litong.,Niu, Kechang.,Wu, Yi.,Geng, Yan.,Mi, Zhaorong.,...&He, JS .(2013).UV radiation is the primary factor driving the variation in leaf phenolics across Chinese grasslands.ECOLOGY AND EVOLUTION.
MLA	Chen, Litong,et al."UV radiation is the primary factor driving the variation in leaf phenolics across Chinese grasslands".ECOLOGY AND EVOLUTION (2013).