skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The interaction between nitrogen and phosphorous is a strong predictor of intra-plant variation in nitrogen isotope composition in a desert species

Abstract

Understanding intra-plant variations in δ 15N is essential for fully utilizing the potential of δ 15N as an integrator of the terrestrial nitrogen (N) cycle and as an indicator of the relative limitation of N and phosphorous (P) on plant growth. Studying such variations can also yield insights into N metabolism by plant as a whole or by specific organs. However, few researchers have systematically evaluated intra-plant variations in δ 15N and their relationships with organ nutrient contents. We excavated whole plant architectures of Nitraria tangutorum Bobrov, a C 3 species of vital regional ecological importance, in two deserts in northwestern China. We systematically and simultaneously measured N isotope ratios and N and P contents of different parts of the excavated plants. We found that intra-plant variations in δ 15N of N. tangutorum were positively correlated with corresponding organ N and P contents. However, it was the N × P interaction, not N and P individually or their linear combination, that was the strongest predictor of intra-plant δ 15N. Additionally, we showed that root δ 15N increased with depth into soil, a pattern similar to profiles of soil δ 15N reported by previous studies in different ecosystems. We hypothesized thatmore » the strong positive intra-plant δ 15N–N and P relationships are caused by three processes acting in conjunction: (1) N and P content-driven fractionating exchanges of ammonia between leaves and the atmosphere (volatilization) during photorespiration, (2) resorption and remobilization of N and P from senescing leaves, and (3) mixture of the re-translocated foliar N and P with existing pools in stems and roots. To test our hypothesis, future studies should investigate plant N volatilization and associated isotope fractionation and intra-plant variations in δ 15N in different species across ecosystems and climates.« less

Authors:
 [1];  [2];  [3];  [4];  [4];  [5];  [4];  [4];  [6]
  1. Chinese Academy of Forestry, Beijing (China). Inst. of Desertification Studies. Research Inst. of Forestry
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division. Climate Change Science Inst.
  3. Chinese Academy of Forestry, Beijing (China). Inst. of Desertification Studies; The Experimental Center of Desert Forestry of the Chinese Academy of Forestry, Dengkou, Inner Mongolia Autonomous Region (China)
  4. Chinese Academy of Forestry, Beijing (China). Inst. of Desertification Studies
  5. Tsinghua Univ., Beijing (China). Center for Earth System Science
  6. Chinese Academy of Forestry, Beijing (China)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); Ministry of Science and Technology (MOST) (China); National Natural Science Foundation of China (NNSFC); State Forestry Administration of China; Chinese Academy of Forestry (CAF)
OSTI Identifier:
1394470
Grant/Contract Number:  
AC05-00OR22725; 2012BAD16B01; 31400620; 201404304; CAF201202; CAFYBB2011007
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Biogeosciences (Online)
Additional Journal Information:
Journal Name: Biogeosciences (Online); Journal Volume: 14; Journal Issue: 1; Journal ID: ISSN 1726-4189
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Zhang, Jinxin, Gu, Lianhong, Zhang, Jingbo, Wu, Rina, Wang, Feng, Lin, Guanghui, Wu, Bo, Lu, Qi, and Meng, Ping. The interaction between nitrogen and phosphorous is a strong predictor of intra-plant variation in nitrogen isotope composition in a desert species. United States: N. p., 2017. Web. doi:10.5194/bg-14-131-2017.
Zhang, Jinxin, Gu, Lianhong, Zhang, Jingbo, Wu, Rina, Wang, Feng, Lin, Guanghui, Wu, Bo, Lu, Qi, & Meng, Ping. The interaction between nitrogen and phosphorous is a strong predictor of intra-plant variation in nitrogen isotope composition in a desert species. United States. doi:10.5194/bg-14-131-2017.
Zhang, Jinxin, Gu, Lianhong, Zhang, Jingbo, Wu, Rina, Wang, Feng, Lin, Guanghui, Wu, Bo, Lu, Qi, and Meng, Ping. Wed . "The interaction between nitrogen and phosphorous is a strong predictor of intra-plant variation in nitrogen isotope composition in a desert species". United States. doi:10.5194/bg-14-131-2017. https://www.osti.gov/servlets/purl/1394470.
@article{osti_1394470,
title = {The interaction between nitrogen and phosphorous is a strong predictor of intra-plant variation in nitrogen isotope composition in a desert species},
author = {Zhang, Jinxin and Gu, Lianhong and Zhang, Jingbo and Wu, Rina and Wang, Feng and Lin, Guanghui and Wu, Bo and Lu, Qi and Meng, Ping},
abstractNote = {Understanding intra-plant variations in δ15N is essential for fully utilizing the potential of δ15N as an integrator of the terrestrial nitrogen (N) cycle and as an indicator of the relative limitation of N and phosphorous (P) on plant growth. Studying such variations can also yield insights into N metabolism by plant as a whole or by specific organs. However, few researchers have systematically evaluated intra-plant variations in δ15N and their relationships with organ nutrient contents. We excavated whole plant architectures of Nitraria tangutorum Bobrov, a C3 species of vital regional ecological importance, in two deserts in northwestern China. We systematically and simultaneously measured N isotope ratios and N and P contents of different parts of the excavated plants. We found that intra-plant variations in δ15N of N. tangutorum were positively correlated with corresponding organ N and P contents. However, it was the N × P interaction, not N and P individually or their linear combination, that was the strongest predictor of intra-plant δ15N. Additionally, we showed that root δ15N increased with depth into soil, a pattern similar to profiles of soil δ15N reported by previous studies in different ecosystems. We hypothesized that the strong positive intra-plant δ15N–N and P relationships are caused by three processes acting in conjunction: (1) N and P content-driven fractionating exchanges of ammonia between leaves and the atmosphere (volatilization) during photorespiration, (2) resorption and remobilization of N and P from senescing leaves, and (3) mixture of the re-translocated foliar N and P with existing pools in stems and roots. To test our hypothesis, future studies should investigate plant N volatilization and associated isotope fractionation and intra-plant variations in δ15N in different species across ecosystems and climates.},
doi = {10.5194/bg-14-131-2017},
journal = {Biogeosciences (Online)},
number = 1,
volume = 14,
place = {United States},
year = {Wed Jan 11 00:00:00 EST 2017},
month = {Wed Jan 11 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: