Phenolic profile within the fine-root branching orders of an evergreen species highlights a disconnect in root tissue quality predicted by elemental- and molecular-level carbon composition

doi:10.1111/nph.13385

CORC > 北京大学 > 城市与环境学院

	Phenolic profile within the fine-root branching orders of an evergreen species highlights a disconnect in root tissue quality predicted by elemental- and molecular-level carbon composition
	Wang Jun-Jian ; Tharayil Nishanth ; Chow Alex T ; Suseela Vidya ; Zeng Hui
刊名	the new phytologist
	2015
关键词	decomposition,fine roots,lignin,lignin indices,organic matter,phenolics
DOI	10.1111/nph.13385
英文摘要	Fine roots constitute a significant source of plant productivity and litter turnover across terrestrial ecosystems, but less is known about the quantitative and qualitative profile of phenolic compounds within the fine-root architecture, which could regulate the potential contribution of plant roots to the soil organic matter pool. To understand the linkage between traditional macro-elemental and morphological traits of roots and their molecular-level carbon chemistry, we analyzed seasonal variations in monomeric yields of the free, bound, and lignin phenols in fine roots (distal five orders) and leaves of Ardisia quinquegona. Fine roots contained two-fold higher concentrations of bound phenols and three-fold higher concentrations of lignin phenols than leaves. Within fine roots, the concentrations of free and bound phenols decreased with increasing root order, and seasonal variation in the phenolic profile was more evident in lower order than in higher order roots. The morphological and macro-elemental root traits were decoupled from the quantity, composition and tissue association of phenolic compounds, revealing the potential inability of these traditional parameters to capture the molecular identity of phenolic carbon within the fine-root architecture and between fine roots and leaves. Our results highlight the molecular-level heterogeneity in phenolic carbon composition within the fine-root architecture, and imply that traits that capture the molecular identity of the root construct might better predict the decomposition dynamics within fine-root orders.? 2015 The Authors. New Phytologist ? 2015 New Phytologist Trust.; SCI(E); PubMed; 0; ARTICLE; junjiaw@clemson.edu; 4; 1261-73; 206
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/188120]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Wang Jun-Jian,Tharayil Nishanth,Chow Alex T,et al. Phenolic profile within the fine-root branching orders of an evergreen species highlights a disconnect in root tissue quality predicted by elemental- and molecular-level carbon composition[J]. the new phytologist,2015.
APA	Wang Jun-Jian,Tharayil Nishanth,Chow Alex T,Suseela Vidya,&Zeng Hui.(2015).Phenolic profile within the fine-root branching orders of an evergreen species highlights a disconnect in root tissue quality predicted by elemental- and molecular-level carbon composition.the new phytologist.
MLA	Wang Jun-Jian,et al."Phenolic profile within the fine-root branching orders of an evergreen species highlights a disconnect in root tissue quality predicted by elemental- and molecular-level carbon composition".the new phytologist (2015).