RNA-seq analysis and transcriptome assembly of Salicornia neei reveals a powerful system for ammonium detoxification

Díaz-Silva, Mónica; Maldonado, Jonathan; Veloso, Pamela; Delgado, Nicol; Silva, Herman

doi:10.1016/j.ejbt.2022.05.003

Cited by 1 publication

(1 citation statement)

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“…In Camelia sinensis, NRT, AMT, AQP, GS, and GOGAT have been identified as key differentially expressed genes (DEGs) regulating ammonium uptake and assimilation [137]. Analysis of the transcriptome of Salicornia neei, a halophyte grown in saline water containing 3 mM ammonium has led to the precise identification of the ammonium detoxification mechanism, mainly through the upregulation of glutamine synthetase and glutamate synthase genes involved in ammonium homeostasis [138].…”

Section: Omics Investigations In Comprehending Nuementioning

confidence: 99%

Ammonium Phytotoxicity and Tolerance: An Insight into Ammonium Nutrition to Improve Crop Productivity

2023

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Ammonium sensitivity is considered a globally stressful condition that affects overall crop productivity. The major toxic symptom associated with ammonium nutrition is growth retardation, which has been associated with a high energy cost for maintaining ion, pH, and hormone homeostasis and, eventually, the NH3/NH4+ level in plant tissues. While certain species/genotypes exhibit extreme sensitivity to ammonium, other species/genotypes prefer ammonium to nitrate as a form of nitrogen. Some of the key tolerance mechanisms used by the plant to deal with NH4+ toxicity include an enhanced activity of an alternative oxidase pathway in mitochondria, greater NH4+ assimilation plus the retention of the minimum level of NH4+ in leaves, and/or poor response to extrinsic acidification or pH drop. Except for toxicity, ammonium can be considered as an energy-efficient nutrition in comparison to nitrate since it is already in a reduced form for use in amino acid metabolism. Through effective manipulation of the NH4+/NO3 ̶ ratio, ammonium nutrition can be used to increase productivity, quality, and resistance to various biotic and abiotic stresses of crops. This review highlights recent advancements in ammonium toxicity and tolerance mechanisms, possible strategies to improve ammonium tolerance, and omics-based understanding of nitrogen use efficiency (NUE) in plants.

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Section: Omics Investigations In Comprehending Nuementioning

confidence: 99%