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Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland
It has widely been documented that nitrogen (N) enrichment stimulates plant growth and modifies plant functional traits in the terrestrial ecosystem. However, it remains unclear whether there are critical transitions or tipping points for the response of plant growth or traits to N enrichment, and h...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428514/ https://www.ncbi.nlm.nih.gov/pubmed/36061793 http://dx.doi.org/10.3389/fpls.2022.982478 |
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author | Yang, Guojiao Zhang, Zijia Zhang, Guangming Liu, Qianguang Zheng, Peiming Wang, Renqing |
author_facet | Yang, Guojiao Zhang, Zijia Zhang, Guangming Liu, Qianguang Zheng, Peiming Wang, Renqing |
author_sort | Yang, Guojiao |
collection | PubMed |
description | It has widely been documented that nitrogen (N) enrichment stimulates plant growth and modifies plant functional traits in the terrestrial ecosystem. However, it remains unclear whether there are critical transitions or tipping points for the response of plant growth or traits to N enrichment, and how these responses differ to different N forms. We chose the native, perennial clonal grass, Leymus chinensis in Inner Mongolia steppe, and conducted a field experiment, in which six N addition rates (0, 2, 5, 10, 20, and 50 g N m(–2) year(–1)) and five N compound types [NH(4)NO(3), (NH(4))(2)SO(4), NH(4)HCO(3), CO(NH(2))(2), slow-release CO(NH(2))(2)] are considered. Here, we found that the different N compound types had no significant effect on the growth of L. chinensis. N addition rate significantly increased plant aboveground biomass and leaf nitrogen concentration, whereas decreased leaf dry matter content. The tipping point for N-induced aboveground biomass increase was at 10 g N m(–2) year(–1), and the changes in functional traits were at N addition rates of 20 g N m(–2) year(–1). Our findings suggested that the responses of aboveground biomass and functional traits to N addition were asymmetric, in which responses in aboveground biomass were more sensitive than that in functional traits. The differential sensitivity of aboveground biomass and functional traits of L. chinensis occurred to N deposition highlights the importance of functional traits in mediating ecosystem functioning in the face of N deposition, regardless of which chemical forms dominate in the deposited N. |
format | Online Article Text |
id | pubmed-9428514 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-94285142022-09-01 Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland Yang, Guojiao Zhang, Zijia Zhang, Guangming Liu, Qianguang Zheng, Peiming Wang, Renqing Front Plant Sci Plant Science It has widely been documented that nitrogen (N) enrichment stimulates plant growth and modifies plant functional traits in the terrestrial ecosystem. However, it remains unclear whether there are critical transitions or tipping points for the response of plant growth or traits to N enrichment, and how these responses differ to different N forms. We chose the native, perennial clonal grass, Leymus chinensis in Inner Mongolia steppe, and conducted a field experiment, in which six N addition rates (0, 2, 5, 10, 20, and 50 g N m(–2) year(–1)) and five N compound types [NH(4)NO(3), (NH(4))(2)SO(4), NH(4)HCO(3), CO(NH(2))(2), slow-release CO(NH(2))(2)] are considered. Here, we found that the different N compound types had no significant effect on the growth of L. chinensis. N addition rate significantly increased plant aboveground biomass and leaf nitrogen concentration, whereas decreased leaf dry matter content. The tipping point for N-induced aboveground biomass increase was at 10 g N m(–2) year(–1), and the changes in functional traits were at N addition rates of 20 g N m(–2) year(–1). Our findings suggested that the responses of aboveground biomass and functional traits to N addition were asymmetric, in which responses in aboveground biomass were more sensitive than that in functional traits. The differential sensitivity of aboveground biomass and functional traits of L. chinensis occurred to N deposition highlights the importance of functional traits in mediating ecosystem functioning in the face of N deposition, regardless of which chemical forms dominate in the deposited N. Frontiers Media S.A. 2022-08-17 /pmc/articles/PMC9428514/ /pubmed/36061793 http://dx.doi.org/10.3389/fpls.2022.982478 Text en Copyright © 2022 Yang, Zhang, Zhang, Liu, Zheng and Wang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Plant Science Yang, Guojiao Zhang, Zijia Zhang, Guangming Liu, Qianguang Zheng, Peiming Wang, Renqing Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland |
title | Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland |
title_full | Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland |
title_fullStr | Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland |
title_full_unstemmed | Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland |
title_short | Tipping point of plant functional traits of Leymus chinensis to nitrogen addition in a temperate grassland |
title_sort | tipping point of plant functional traits of leymus chinensis to nitrogen addition in a temperate grassland |
topic | Plant Science |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9428514/ https://www.ncbi.nlm.nih.gov/pubmed/36061793 http://dx.doi.org/10.3389/fpls.2022.982478 |
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