Identification and Expression of the CorA/MRS2/ALR Type Magnesium Transporters in Tomato

Overview

Journal Plants (Basel)

Date 2023 Jul 14

PMID 37447072

Authors

Wen Liu

Shahbaz Khan

Mengying Tong

Haiyan Hu

Liyan Yin

Jiaquan Huang

Affiliations

Soon will be listed here.

Abstract

Magnesium (Mg) is the most abundant divalent ion in plants, participating in numerous metabolic processes in growth and development. CorA/MRS2/ALR type Mg transporters are essential for maintaining Mg homeostasis in plants. However, the candidate protein and its potential functions in the tomato plant have not been fully understood. In this study, we identified seven MGT genes () in tomato based on sequence similarity, domain analysis, conserved motif identification, and structure prediction. Two genes were analyzed in the bacterial strain MM281, and a functional complementary assay demonstrated their high-affinity transport of Mg. Quantitative real-time PCR analysis revealed that the expressions of these Mg transporters were down-regulated in leaves under Mg limitation, with a greater impact on lower and middle leaves compared to young leaves. Conversely, under Mg toxicity, several genes were up-regulated in leaves with a circadian rhythm. Our findings indicate that members of the SlMRS2 family function as Mg transporters and lay the groundwork for further analysis of their distinct functions in tomato.

Citing Articles

Genome-wide identification of MGT gene family in soybean (Glycine max) and their expression analyses under magnesium stress conditions.

Anwar A, Akhtar J, Aleem S, Aleem M, Razzaq M, Alamri S BMC Plant Biol. 2025; 25(1):83.

PMID: 39838318 PMC: 11752955. DOI: 10.1186/s12870-024-05985-7.

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