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Nitrogen Addition Changes the Allelopathic Effects of the Root Leachate from the Invasive Weed Stellera chamaejasme L. on a Dominant Grass in the Songnen Grassland

Nitrogen Addition Changes the Allelopathic Effects of the Root Leachate from the Invasive Weed... Invasive weeds that are poisonous to animals may affect the growth of neighboring palatable plants by releasing allelochemicals in degraded grasslands. Nitrogen (N) input may promote the growth of plants and alter the soil and plant nutrient content and their stoichiometric ratios. However, it is unclear how N addition mediates allelopathic effects of unpalatable weeds on adjacent plants. In this study, a greenhouse experiment was performed to detect the combined effects of root leachate of an invasive and unpalatable weed, Stellera chamaejasme, and N addition on the phenotypic traits and nutrient stoichiometry of a dominant grass, Leymus chinensis, in the Songnen grassland, China. The results showed that leachate addition had no significant effects on traits such as ramet number and biomass but significantly decreased total carbon (C) and the C:N ratio and increased total N in the shoots of L. chinensis. Furthermore, higher N addition changed the original allelopathic effects of the leachate by changing the soil pH, N and phosphorous availability, and microbial activity. This study emphasizes the significance of stoichiometry for detecting plant allelopathy. In particular, N deposition and plant allelopathy should be considered in assessing the relationships between invasive weeds and palatable plants in degraded grasslands. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Plant Biology Springer Journals

Nitrogen Addition Changes the Allelopathic Effects of the Root Leachate from the Invasive Weed Stellera chamaejasme L. on a Dominant Grass in the Songnen Grassland

Chen, Chen; Xing, Fu; Li, Zhuo; Zhang, Ruohui
Journal of Plant Biology , Volume OnlineFirst – Mar 7, 2023
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References (84)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Korean Society of Plant Biologist 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
1226-9239
eISSN
1867-0725
DOI
10.1007/s12374-023-09389-2
Publisher site
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Abstract

Invasive weeds that are poisonous to animals may affect the growth of neighboring palatable plants by releasing allelochemicals in degraded grasslands. Nitrogen (N) input may promote the growth of plants and alter the soil and plant nutrient content and their stoichiometric ratios. However, it is unclear how N addition mediates allelopathic effects of unpalatable weeds on adjacent plants. In this study, a greenhouse experiment was performed to detect the combined effects of root leachate of an invasive and unpalatable weed, Stellera chamaejasme, and N addition on the phenotypic traits and nutrient stoichiometry of a dominant grass, Leymus chinensis, in the Songnen grassland, China. The results showed that leachate addition had no significant effects on traits such as ramet number and biomass but significantly decreased total carbon (C) and the C:N ratio and increased total N in the shoots of L. chinensis. Furthermore, higher N addition changed the original allelopathic effects of the leachate by changing the soil pH, N and phosphorous availability, and microbial activity. This study emphasizes the significance of stoichiometry for detecting plant allelopathy. In particular, N deposition and plant allelopathy should be considered in assessing the relationships between invasive weeds and palatable plants in degraded grasslands.

Journal

Journal of Plant Biology – Springer Journals

Published: Mar 7, 2023

Keywords: Unpalatable plants; Allelopathic effects; Interspecific relationships; Nitrogen deposition; Soil nutrients; Plant stoichiometry

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