NDLI: The preference of nitrate uptake in Chinese prickly ash estimated by δ$^{15}$N values and cation concentrations

Content Provider	Springer Nature Link
Author	Piao, He Chun Li, Si Liang Wang, Shi Jie Li, She Hong
Copyright Year	2017
Abstract	The nitrogen isotopic compositions of plant tissue could reflect its uptake of and preference for ammonium or nitrate. However, various factors may influence the field-collected δ$^{15}$N values under field condition, which causes the interpretation problematic. The spatial variation of nitrogen (N) concentrations and the isotopic compositions were investigated in the soils and tissues of Chinese prickly ash from the southwest China to the east China. The objectives were to investigate the variation in soil and tissue δ$^{15}$N values and N forms taken up by the plant. The leaf and root δ$^{15}$N values varied significantly in response to the pattern of soil δ$^{15}$N values. The difference in δ$^{15}$N values between the leaves and roots was 2.57‰ and may be caused by an increase in the transport of unassimilated $$ {\text{NO}}_{3}^{ - } $$ and $$ {\text{NH}}_{4}^{ + } $$ to the leaves. Leaf nitrogen was significantly and positively correlated with leaf potassium and negatively related to leaf calcium. Because potassium is the favoured counter-cation for nitrate transport in the xylem, the enrichment of $^{15}$N in leaf relative to root induced by preferenced uptake of nitrate should be accompanied by significant and positive relationship of leaf nitrogen with leaf potassium concentrations. These results suggest that Chinese prickly ash prefers $$ {\text{NO}}_{3}^{ - } $$ over $$ {\text{NH}}_{4}^{ + } $$ .
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	76
Issue Number	2
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-01-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Preference δ$^{15}$N values Counter-cation Nitrate Ammonium Chinese prickly ash Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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