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Mechanisms of ammonium detoxification in submerged macrophytes under shade conditions.
Ochieng, Wyckliffe Ayoma; Muthui, Samuel Wamburu; Xian, Ling; Linda, Elive Limunga; Kombe, Clarice Amani; Uwiragiye, Jeannette; Gituru, Robert Wahiti; Gichua, Moses Kirega; Liu, Fan.
Afiliación
  • Ochieng WA; Core Botanical Gardens/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, PR China; Sino-Africa Joint Research Centre, Chinese Academy of Sciences, Wuhan, Hubei, PR China; University of the Chinese Academy of Sciences, Beijing, PR China.
  • Muthui SW; Core Botanical Gardens/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, PR China; Sino-Africa Joint Research Centre, Chinese Academy of Sciences, Wuhan, Hubei, PR China; University of the Chinese Academy of Sciences, Beijing, PR China.
  • Xian L; Core Botanical Gardens/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, PR China; Sino-Africa Joint Research Centre, Chinese Academy of Sciences, Wuhan, Hubei, PR China; University of the Chinese Academy of Sciences, Beijing, PR China.
  • Linda EL; School of Resources and Environmental Science, Hubei University, Wuhan 430074, PR China.
  • Kombe CA; Core Botanical Gardens/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, PR China; Sino-Africa Joint Research Centre, Chinese Academy of Sciences, Wuhan, Hubei, PR China; University of the Chinese Academy of Sciences, Beijing, PR China.
  • Uwiragiye J; Core Botanical Gardens/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, PR China; Sino-Africa Joint Research Centre, Chinese Academy of Sciences, Wuhan, Hubei, PR China; University of the Chinese Academy of Sciences, Beijing, PR China.
  • Gituru RW; Botany Department, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.
  • Gichua MK; Botany Department, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.
  • Liu F; Core Botanical Gardens/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, PR China; Sino-Africa Joint Research Centre, Chinese Academy of Sciences, Wuhan, Hubei, PR China; University of the Chinese Academy of Sciences, Beijing, PR China. Electronic address: fanliu@wbgcas.cn.
Sci Total Environ ; 951: 175795, 2024 Nov 15.
Article en En | MEDLINE | ID: mdl-39187089
ABSTRACT
Excessive ammonium disrupts the biological and physical characteristics of aquatic freshwater ecosystems, causing nutrient imbalances and toxicity. Different macrophytes exhibit varying tolerance levels to ammonium stress, influenced by species-specific adaptations. However, eutrophic water bodies not only have high nutrient loads but also exhibit low light transparency, necessitating an understanding of how submerged macrophytes cope with both high ammonium concentrations and low light conditions. In this study, we explored the tolerance of submerged macrophytes under these challenging conditions by testing various ammonium concentrations and light intensities. Our findings reveal that Myriophyllum spicatum demonstrates high ammonium tolerance under both optimal and low light intensities. Specifically, under optimal light, the primary ammonium assimilation pathway is catalyzed by NADH-GDH (Nicotinamide Adenine Dinucleotide-dependent Glutamate Dehydrogenase), with its activity increasing 4-fold at 50 mg L-1 [NH4+-N] compared to the control. Conversely, under low light intensity, the GS (Glutamine Synthetase)-catalyzed pathway becomes predominant, with GS activity rising 3-fold at 50 mg L-1 [NH4+-N] compared to the control. These results provide new insights into the adaptive mechanisms of M. spicatum, highlighting its flexible strategies for ammonium assimilation and its potential application in water restoration efforts. This study offers valuable information on the enzymatic pathways involved in ammonium detoxification, which is essential for developing effective strategies to manage and restore eutrophic aquatic systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos de Amonio Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos de Amonio Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos