Whole-tree dynamics of non-structural carbohydrate and nitrogen pools across different seasons and in response to girdling in two temperate trees
Mei, L; Xiong, YM; Gu, JC; Wang, ZQ; Guo, DL
2015
Source PublicationOECOLOGIA
ISSN0029-8549
Volume177Issue:2Pages:333-344
AbstractDespite extensive research on the seasonal dynamics of non-structural carbohydrate (NSC) and nitrogen (N) concentrations, the size and relative contributions of NSC and N pools across different tree organs are not well understood. We have measured the changes in NSC and N concentrations in leaves, branches, stems and all root branch orders at monthly intervals in control and girdled trees of larch (Larix gmelinii) and ash (Fraxinus mandshurica). The biomass of each plant compartment was also determined to calculate the size of the NSC and N pools. In both species, 13-37 % of the NSC and N pools were mobilized at the beginning of the growing season. Among the mobilized pools, stems and non-absorptive roots (branch orders 4-9) acted as the largest NSC sources in larch and ash, respectively, while branches served as the largest N source in both species. After stem girdling, 22 and 50 % of the root NSC stores in larch and ash, respectively, were mobilized to maintain root activities during the growing season. Tree mortality was observed 1 year after girdling, at which time there was still an abundant NSC pool in the roots. We conclude that (1) different storage organs differ in their contribution to new tissue growth at the beginning of the growing season and that those storage organs holding higher fractions of the NSC or N pool are not necessarily those which mobilize more NSC or N; (2) tree growth may not be limited by carbon (C) availability; (3) C storage in non-absorptive roots plays an important role in maintaining tree survival after the termination of photosynthate flow from aboveground sources.
SubtypeJournal
KeywordC storage N storage Source-sink relation C limitation Root branch order
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEcology
WOS KeywordFINE-ROOT ARCHITECTURE ; INTERSPECIFIC VARIATION ; FRAXINUS-MANDSHURICA ; TROPICAL FOREST ; BRANCH ORDERS ; SUGAR CONTENT ; RESPIRATION ; STORAGE ; ALLOCATION ; RESERVES
Indexed BySCI
Language英语
WOS IDWOS:000348981500003
PublisherSPRINGER
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44458
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
Mei, L,Xiong, YM,Gu, JC,et al. Whole-tree dynamics of non-structural carbohydrate and nitrogen pools across different seasons and in response to girdling in two temperate trees[J]. OECOLOGIA,2015,177(2):333-344.
APA Mei, L,Xiong, YM,Gu, JC,Wang, ZQ,&Guo, DL.(2015).Whole-tree dynamics of non-structural carbohydrate and nitrogen pools across different seasons and in response to girdling in two temperate trees.OECOLOGIA,177(2),333-344.
MLA Mei, L,et al."Whole-tree dynamics of non-structural carbohydrate and nitrogen pools across different seasons and in response to girdling in two temperate trees".OECOLOGIA 177.2(2015):333-344.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Mei, L]'s Articles
[Xiong, YM]'s Articles
[Gu, JC]'s Articles
Baidu academic
Similar articles in Baidu academic
[Mei, L]'s Articles
[Xiong, YM]'s Articles
[Gu, JC]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Mei, L]'s Articles
[Xiong, YM]'s Articles
[Gu, JC]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.