ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Nutrition
This article is part of the Research TopicExploring Mechanisms and Alleviation Strategies for Ammonium Toxicity in Plants, with a Focus on Abiotic Stress InteractionsView all 4 articles
LED-Supplied Blue Light Mitigates Ammonium Toxicity in Rapeseed (Brassica napus L.) Plants
Provisionally accepted
Wenjing Li1Jingli Yang1,2,3Jingmin Zhang1,3Haicheng Xu1Dianliang Peng1Maopeng Sang3
Byoung Ryong Jeong2
Jinnan Song1,2,3*- 1Weifang University of Science and Technology, Weifang, China
- 2Gyeongsang National University College of Agriculture and Life Sciences, Jinju-si, Republic of Korea
- 3Jingzhi-Maoteng Agricultural Technology Limited Company in Qushui County, Lhasa, China
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Ammonium (NH4+) toxicity adversely curtails the growth ability and productivity of rapeseed plants. Current knowledge shows that blue (B) light is an alternative adopted to minimize or alleviate the disturbances by various abiotic stresses. However, little study was conducted on NH4+ stressed rapeseed plants to illustrate the alleviatory role of blue light. Therefore, this study was performed to investigate whether blue light could reduce the NH4+ toxicity degree in rapeseed and concomitantly determine the underlying mechanism. To this end, the rapeseed plants were cultured in a controlled circumstance environment (14 h light at 22 ℃ and 10 h dark at 18 ℃) and treated with one of three NH4+: NO3-regimes (0: 100, 50: 50, and 100: 0) with a constant nitrogen at 13 me·L-1, corresponding with white LED light or blue LED light at 200 PPFD. Exclusively NH4+ treated rapeseed plants under white light exhibited decreased growth ability, disturbed photosynthesis, inhibited antioxidant defense system, limited nitrogen (N) assimilation pathway, and finally developed NH4+ toxicity symptoms (as characterized by chlorosis, necrosis, and stunted morphology). Nevertheless, these mentioned traits or parameters were significantly mitigated after blue light treatment. Collectively, this study enlightened the benefits of blue light on plants, particularly pertaining to the NH4+-sensitive species, such as rapeseed.
Keywords: Antioxidant Enzymes, Nitrogen Assimilation Pathway, Nitrogen nutrition, Photosynthetic ability, Rapeseed1, Nitrogen Nutrition2, Photosynthetic Ability3, AntioxidantEnzymes4
Received: 14 Oct 2025; Accepted: 27 Nov 2025.
Copyright: © 2025 Li, Yang, Zhang, Xu, Peng, Sang, Jeong and Song. 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) or licensor 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.
* Correspondence: Jinnan Song
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