Seasonal variation in chemistry, but not morphology, in roots of Quercus robur growing in different soil types
Zadworny, M; McCormack, ML; Rawlik, K; Jagodzinski, AM
2015
Source PublicationTREE PHYSIOLOGY
ISSN0829-318X
Volume35Issue:6Pages:644-652
AbstractPatterns of root traits among different root orders and their variation across seasons are of considerable importance for soil resource acquisition and partitioning in forest ecosystems. We evaluated whether morphological, anatomical and biochemical traits varied among root orders of Quercus robur (L.) sampled across spring, summer and fall seasons and growing in two different soil types with contrasting site fertility. We found no consistent differences in root diameter and specific root length in relation to soil type or growing season. There was, however, a strong seasonal variation in patterns of nitrogen (N) concentration among root orders. During spring and summer, N concentration was highest in the most distal, absorptive portion of the root system. At the end of the growing season, we observed a sharp decline in the N concentration of these lower-order, absorptive roots and an increase in N concentration of the higher-order, transport roots. The specific mechanisms driving the seasonally changing N concentration remain unclear but are likely related to different functions of lower-order roots for absorption and higher-order roots for structure and storage. Future work should identify how common the observed seasonal changes in N concentration are across species and determine what specific environmental cues plants or roots use to trigger shifts in resource allocation within the root branching hierarchy.
SubtypeJournal
Keywordnitrogen reserve oak forest root order diversity seasonal variation storage
Subject AreaForestry
WOS Subject ExtendedForestry
WOS KeywordPINUS-SYLVESTRIS L. ; BRANCH ORDER ; FINE ROOTS ; FRAXINUS-MANDSHURICA ; NUTRIENT RESORPTION ; FROST HARDINESS ; LIFE-SPAN ; NITROGEN ; TREE ; BIOMASS
Indexed BySCI
Language英语
WOS IDWOS:000357893400007
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44411
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zadworny, M,McCormack, ML,Rawlik, K,et al. Seasonal variation in chemistry, but not morphology, in roots of Quercus robur growing in different soil types[J]. TREE PHYSIOLOGY,2015,35(6):644-652.
APA Zadworny, M,McCormack, ML,Rawlik, K,&Jagodzinski, AM.(2015).Seasonal variation in chemistry, but not morphology, in roots of Quercus robur growing in different soil types.TREE PHYSIOLOGY,35(6),644-652.
MLA Zadworny, M,et al."Seasonal variation in chemistry, but not morphology, in roots of Quercus robur growing in different soil types".TREE PHYSIOLOGY 35.6(2015):644-652.
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