中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 成都生物研究所
  3. 中国科学院成都生物研究所
  4. 生物多样性与生态系统服务领域
  5. 生态系统恢复与生物多样性保育四川省重点实验室
Enhanced root exudation stimulates soil nitrogen transformations in a subalpine coniferous forest under experimental warming

文献类型：期刊论文

作者Yin, Huajun1,2; Li, Yufei1,2; Xiao, Juan1,2; Xu, Zhenfeng3; Cheng, Xinyin1,2; Liu, Qing1,2
刊名GLOBAL CHANGE BIOLOGY
出版日期2013-07
卷号19期号:7页码:2158-2167
关键词exudation N transformation nutrient availability subalpine coniferous forest warming
ISSN号1354-1013
DOI10.1111/gcb.12161
产权排序1
文献子类Article
英文摘要Despite the perceived importance of exudation to forest ecosystem function, few studies have attempted to examine the effects of elevated temperature and nutrition availability on the rates of root exudation and associated microbial processes. In this study, we performed an experiment in which in situ exudates were collected from Picea asperata seedlings that were transplanted in disturbed soils exposed to two levels of temperature (ambient temperature and infrared heater warming) and two nitrogen levels (unfertilized and 25g Nm-2a-1). Here, we show that the trees exposed to an elevated temperature increased their exudation rates I (gCg-1 root biomassh-1), II (gCcm-1root lengthh-1) and III (gCcm-2root areah-1) in the unfertilized plots. The altered morphological and physiological traits of the roots exposed to experimental warming could be responsible for this variation in root exudation. Moreover, these increases in root-derived C were positively correlated with the microbial release of extracellular enzymes involved in the breakdown of organic N (R2=0.790; P=0.038), which was coupled with stimulated microbial activity and accelerated N transformations in the unfertilized soils. In contrast, the trees exposed to both experimental warming and N fertilization did not show increased exudation rates or soil enzyme activity, indicating that the stimulatory effects of experimental warming on root exudation depend on soil fertility. Collectively, our results provide preliminary evidence that an increase in the release of root exudates into the soil may be an important physiological adjustment by which the sustained growth responses of plants to experimental warming may be maintained via enhanced soil microbial activity and soil N transformation. Accordingly, the underlying mechanisms by which plant root-microbe interactions influence soil organic matter decomposition and N cycling should be incorporated into climate-carbon cycle models to determine reliable estimates of long-term C storage in forests.
学科主题Environment/ecology
URL标识查看原文
WOS关键词EASTERN TIBETAN PLATEAU ; ELEVATED CO2 ; TEMPERATURE SENSITIVITY ; MICROBIAL FEEDBACKS ; N AVAILABILITY ; PICEA-ASPERATA ; PLANT BIOMASS ; CARBON ; SEEDLINGS ; GROWTH
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000319963500015
出版者WILEY-BLACKWELL
源URL[http://210.75.237.14/handle/351003/29918]  
专题生物多样性与生态系统服务领域_生态系统恢复与生物多样性保育四川省重点实验室
生物多样性与生态系统服务领域_中国科学院山地生态恢复与生物资源利用重点实验室
生物多样性与生态系统服务领域_生态研究
通讯作者Liu, Qing
作者单位1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China;
2.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu 610041, Peoples R China;
3.Sichuan Agr Univ, Inst Ecol & Forestry, Chengdu 611130, Peoples R China
推荐引用方式
GB/T 7714		 Yin, Huajun,Li, Yufei,Xiao, Juan,et al. Enhanced root exudation stimulates soil nitrogen transformations in a subalpine coniferous forest under experimental warming[J]. GLOBAL CHANGE BIOLOGY,2013,19(7):2158-2167.
APA Yin, Huajun,Li, Yufei,Xiao, Juan,Xu, Zhenfeng,Cheng, Xinyin,&Liu, Qing.(2013).Enhanced root exudation stimulates soil nitrogen transformations in a subalpine coniferous forest under experimental warming.GLOBAL CHANGE BIOLOGY,19(7),2158-2167.
MLA Yin, Huajun,et al."Enhanced root exudation stimulates soil nitrogen transformations in a subalpine coniferous forest under experimental warming".GLOBAL CHANGE BIOLOGY 19.7(2013):2158-2167.

入库方式： OAI收割

来源：成都生物研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。