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Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species

Seed germination plays an important role in mediating plant species composition of grassland communities under nitrogen (N) enrichment. Shifts of plant community structure with N‐enhanced deposition in terrestrial ecosystems have occurred globally. Despite numerous studies about the effects of enhan...

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Autores principales: Zhang, Tong, Liu, Mengzhou, Huang, Xudong, Hu, Wei, Qiao, Ning, Song, Hongquan, Zhang, Bing, Zhang, Rui, Yang, Zhongling, Liu, Yinzhan, Miao, Yuan, Han, Shijie, Wang, Dong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7452761/
https://www.ncbi.nlm.nih.gov/pubmed/32884657
http://dx.doi.org/10.1002/ece3.6576
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author Zhang, Tong
Liu, Mengzhou
Huang, Xudong
Hu, Wei
Qiao, Ning
Song, Hongquan
Zhang, Bing
Zhang, Rui
Yang, Zhongling
Liu, Yinzhan
Miao, Yuan
Han, Shijie
Wang, Dong
author_facet Zhang, Tong
Liu, Mengzhou
Huang, Xudong
Hu, Wei
Qiao, Ning
Song, Hongquan
Zhang, Bing
Zhang, Rui
Yang, Zhongling
Liu, Yinzhan
Miao, Yuan
Han, Shijie
Wang, Dong
author_sort Zhang, Tong
collection PubMed
description Seed germination plays an important role in mediating plant species composition of grassland communities under nitrogen (N) enrichment. Shifts of plant community structure with N‐enhanced deposition in terrestrial ecosystems have occurred globally. Despite numerous studies about the effects of enhanced N deposition on mature plant communities, few studies have focused on seed germination. Using a laboratory experiment, we report the effects of five N concentrations, including 0, 5, 10, 20, and 40 mM N (NH(4)NO(3)) on seed germination of eight semi‐arid grassland species. Results showed that low N concentrations (5‐ and 20‐mM N) promoted mean final germination proportion of all eight species by 4.4% and 6.4%, but high concentrations (40 mM N) had no effect. The mean germination rate was decreased 2.1% and 5.1% by higher N concentration (20‐ and 40‐mM N) levels, but germination start time showed the opposite trend, delayed by 0.7, 0.9, and 1.8 d for the 10, 20, and 40 mM N treatments. Final germination proportion, mean germination rate, and germination start time were significantly different among species in response to N concentration treatments. The final germination proportion of Allium tenuissimum and Chenopodium glaucum were suppressed by increased N concentration, whereas it increased for Potentilla bifurca, Plantago asiatica, and Setaria viridis. Our findings provide novel insights into N deposition‐induced species loss based on seed germination factors in semi‐arid grassland communities.
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spelling pubmed-74527612020-09-02 Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species Zhang, Tong Liu, Mengzhou Huang, Xudong Hu, Wei Qiao, Ning Song, Hongquan Zhang, Bing Zhang, Rui Yang, Zhongling Liu, Yinzhan Miao, Yuan Han, Shijie Wang, Dong Ecol Evol Original Research Seed germination plays an important role in mediating plant species composition of grassland communities under nitrogen (N) enrichment. Shifts of plant community structure with N‐enhanced deposition in terrestrial ecosystems have occurred globally. Despite numerous studies about the effects of enhanced N deposition on mature plant communities, few studies have focused on seed germination. Using a laboratory experiment, we report the effects of five N concentrations, including 0, 5, 10, 20, and 40 mM N (NH(4)NO(3)) on seed germination of eight semi‐arid grassland species. Results showed that low N concentrations (5‐ and 20‐mM N) promoted mean final germination proportion of all eight species by 4.4% and 6.4%, but high concentrations (40 mM N) had no effect. The mean germination rate was decreased 2.1% and 5.1% by higher N concentration (20‐ and 40‐mM N) levels, but germination start time showed the opposite trend, delayed by 0.7, 0.9, and 1.8 d for the 10, 20, and 40 mM N treatments. Final germination proportion, mean germination rate, and germination start time were significantly different among species in response to N concentration treatments. The final germination proportion of Allium tenuissimum and Chenopodium glaucum were suppressed by increased N concentration, whereas it increased for Potentilla bifurca, Plantago asiatica, and Setaria viridis. Our findings provide novel insights into N deposition‐induced species loss based on seed germination factors in semi‐arid grassland communities. John Wiley and Sons Inc. 2020-07-20 /pmc/articles/PMC7452761/ /pubmed/32884657 http://dx.doi.org/10.1002/ece3.6576 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Zhang, Tong
Liu, Mengzhou
Huang, Xudong
Hu, Wei
Qiao, Ning
Song, Hongquan
Zhang, Bing
Zhang, Rui
Yang, Zhongling
Liu, Yinzhan
Miao, Yuan
Han, Shijie
Wang, Dong
Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species
title Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species
title_full Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species
title_fullStr Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species
title_full_unstemmed Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species
title_short Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species
title_sort direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7452761/
https://www.ncbi.nlm.nih.gov/pubmed/32884657
http://dx.doi.org/10.1002/ece3.6576
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