Plant nitrogen acquisition from inorganic and organic sources via root and mycelia pathways in ectomycorrhizal alpine forests

doi:10.1016/j.soilbio.2019.06.013

CORC > 成都生物研究所 > 中国科学院成都生物研究所 > 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

	Plant nitrogen acquisition from inorganic and organic sources via root and mycelia pathways in ectomycorrhizal alpine forests
	Zhang, Ziliang 2,3,4; Yuan, Yuanshuang 1,2,3; Liu, Qing 3; Yin, Huajun 3
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2019
卷号	136 页码:107517
关键词	Ectomycorrhizal fungi Extramatrical mycelia Nitrogen uptake Fine roots Alpine coniferous forest
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2019.06.013
产权排序	1
文献子类	Article
英文摘要	Ectomycorrhizal (ECM) fungi associated with plant roots play important roles in facilitating plant nutrient uptake. Ectomycorrhizal trees obtain soil nitrogen (N) through the direct root uptake from the rhizosphere (i.e., root pathway), but also via the extramatrical mycelia of ECM fungi followed by translocation to fine roots (i.e., mycelia pathway). However, estimates of the relative contributions of the root pathway versus the mycelia pathway to plant acquisition of different soil N sources are highly uncertain, leaving a key gap in understanding plant N acquisition strategies and plant-mycorrhiza interactions in forest ecosystems. In this study, by combining an ingrowth core method and in situ N-15 labelling techniques, we quantified the plant N uptake (inorganic vs. organic N) from root and mycelia pathways in two ectomycorrhizal alpine forests: a 70-year-old spruce plantation and a 200-year-old spruce-fir dominated forest in western Sichuan, China. We found that, across the two forests and seasons, plants obtained inorganic N in the soil primarily through the root pathway (81.9%), while acquiring similar to 44% of organic N via the extramatrical mycelia of ECM fungi. The contribution of the mycelia pathway to plant organic N uptake was significantly enhanced during the non-growing season (52.6%) compared to that during the growing season (35.5%). Our study suggests that the mycelia of ECM fungi are of critical importance in the plant organic N economy in alpine coniferous forests. In addition, our findings highlight that plants associated with ECM fungi can adjust the dominance of the root pathway vs. the mycelia pathway in plant N acquisition dependent on their N demand and soil N availability. This study may provide new insight into understanding the ectomycorrhizal effects on N cycling and the structure and function of forest ecosystems.
学科主题	Agriculture/agronomy
URL标识	查看原文
WOS关键词	ARBUSCULAR MYCORRHIZAL FUNGI ; EASTERN TIBETAN PLATEAU ; AMINO-ACIDS ; CARBON ; BIOMASS ; GROWTH ; ECOSYSTEMS ; RESPONSES ; TRANSFORMATIONS ; MINERALIZATION
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000483908600004
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30540]
专题	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
作者单位	1.Guizhou Minzu Univ, Coll Ecoenvironm Engn, Guiyang 550025, Guizhou, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, CAS Key Lab Mt Ecol Restorat Bioresource Utilizat, Ecol Restorat Biodivers Conservat Key Lab Sichuan Prov, Chengdu Inst Biol, Chengdu 610041, Sichuan, Peoples R China; 4.Clemson Univ, Dept Plant & Environm Sci, Clemson, SC 29634 USA;
推荐引用方式 GB/T 7714	Zhang, Ziliang,Yuan, Yuanshuang,Liu, Qing,et al. Plant nitrogen acquisition from inorganic and organic sources via root and mycelia pathways in ectomycorrhizal alpine forests[J]. SOIL BIOLOGY & BIOCHEMISTRY,2019,136:107517.
APA	Zhang, Ziliang,Yuan, Yuanshuang,Liu, Qing,&Yin, Huajun.(2019).Plant nitrogen acquisition from inorganic and organic sources via root and mycelia pathways in ectomycorrhizal alpine forests.SOIL BIOLOGY & BIOCHEMISTRY,136,107517.
MLA	Zhang, Ziliang,et al."Plant nitrogen acquisition from inorganic and organic sources via root and mycelia pathways in ectomycorrhizal alpine forests".SOIL BIOLOGY & BIOCHEMISTRY 136(2019):107517.