DOI: 10.1007/s10533-014-0028-5
Scopus记录号: 2-s2.0-84917690834
论文题名: A larger investment into exudation by competitive versus conservative plants is connected to more coupled plant–microbe N cycling
作者: Kaštovská E. ; Edwards K. ; Picek T. ; Šantrůčková H.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122, 期: 1 起始页码: 47
结束页码: 59
语种: 英语
英文关键词: Exudation
; Grassland
; Labile N
; Microbial biomass
; Plant growth strategy
; The plant–microbe interaction
Scopus关键词: dominance
; grassland
; microbial ecology
; nitrogen cycle
; plant community
; root system
; seasonal variation
; soil microorganism
; Carex
; Carex acuta
; Glyceria
; Glyceria maxima
英文摘要: Plant–microbe interactions actively control nitrogen (N) cycling in the ecosystem. We hypothesize that the investment into exudation and the coupling of plant–microbe N cycling will be larger in competitive plants compared to the more conservative species. Root exudation of competitive (Glyceria maxima) and conservative (Carex acuta) plants was estimated by13C-CO2labeling. Seasonal changes in plant, microbial, and soil soluble N pools as well as potential net microbial N transformations were determined to interconnect the C and N cycling within grassland ecosystems dominated by these species. We showed that competitive Glyceria, as compared to conservative Carex, appears to affect soil N cycling through a more direct temporal and spatial influence on soil microbes due to a larger investment into root exudation. This makes the system highly dynamic, with faster soil N cycling and pronounced seasonal N redistribution between plants and microbes. The conservative Carex, irrespective of its larger root system, invested less C to exudation. In this case, the plant–microbe relationships appear to be less-coupled in time and space with the plant N supply likely relying mainly on the relatively slow microbial mineralization of organic matter than on rhizosphere priming effect. We showed that differences in soil N cycling associated with competitive versus conservative plants are closely connected with their different investments into root exudation, which govern the coupling of plant–microbe interactions in time and space. © 2014, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83557
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Ecosystem Biology, University of South Bohemia, Branišovská 31, České Budějovice, Czech Republic
Recommended Citation:
Kaštovská E.,Edwards K.,Picek T.,et al. A larger investment into exudation by competitive versus conservative plants is connected to more coupled plant–microbe N cycling[J]. Biogeochemistry,2015-01-01,122(1)