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Shah Iftikhar Hussain,Manzoor Muhammad Aamir,Sabir Irfan Ali,Ashraf Muhammad,Haq Fazal,Arif Samiah,Abdullah Muhammad,Niu Qingliang,Zhang Yidong 한국원예학회 2022 Horticulture, Environment, and Biotechnology Vol.63 No.4
The multidrug and toxic compound extrusion (MATE) protein family includes a primeval gene family of secondary transporters that export toxins, extrude metabolites, and participate in plant defense mechanisms. However, lack of information regarding the MATE gene family in Cucurbitaceae, a comprehensive genome-wide analysis of the MATE family was carried out in four Cucurbitaceae species (Cucumis melo, Cucumis sativus, Cucurbita pepo, and Lagenaria siceraria), and 174 MATE genes were identified. Phylogenetic and structural analysis revealed that the Cucurbitaceae MATE transporters family could be further classified into seven subgroups (A–G). GO annotation-based subcellular localization analysis predicted that most of the MATE gene family members localized on the plasma membrane. Moreover, conserved motifs and gene structure (intron/exon) analysis revealed the functional divergence between clades. Transposed duplication events have played a key role in the expansion and evolution of the MATE gene family in Cucumis melo. Cis-acting elements analysis of MATE family genes revealed that these could be targeted by a diverse set of trans-acting factors involving the MATE gene family to manage diverse stress conditions. The Chromosomal localization and molecular characteristics (weight, length, and pI) were performed using numerous bioinformatics tools. Intraspecies microsynteny analysis demonstrated that maximum orthologous genes were found between A. thaliana, C. pepo, C. lanatus, and L. siceraria. Further, functional analysis of microRNAs demonstrated miRNAs are involved in the growth and regulation of MATE genes. Finally, eleven candidates MATE genes were selected randomly, and their expression analysis was carried out via qRT-PCR at 0 h and after 24 h of salt stress. Furthermore, transient CmMATE expression in Arabidopsis thaliana protoplasts showed that protein localized on the plasma membrane. This study provides insights into the functional analysis of the MATE gene family in Cucurbitaceae species and laid down the basic knowledge to explore the role and mechanism of the MATE gene family to cope with severe salt stress conditions.
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Differential Response of Two Contrasting Melon (Cucumis melo L.) Genotypes to Drought Stress
Asad Rehman,Jinyang Weng,Pengli Li,Jing Yu,Saeed ur Rahman,Muhammad Khalid,Iftikhar Hussain Shah,Shazma Gulzar,Liying Chang,Qingliang Niu 한국식물학회 2023 Journal of Plant Biology Vol.66 No.6
The present study aims to gain insights into the response mechanisms of drought stress tolerance among two contrasting melon (Cucumis melo L.) genotypes. Drought stress was imposed by polyethylene glycol (10%) for 7 days and various physiochemical and molecular characteristics were analyzed on different days of drought stress treatment. Results revealed that the drought-sensitive genotype (MG-II) was significantly affected by drought stress, as evidenced from the elevation in hydrogen peroxide (H2O2), malondialdehyde content (MDA), and electrolyte leakage (EC). Furthermore, drought stress significantly hindered the vegetative growth, chlorophyll fluorescence, photosynthetic pigments, and leaf gas exchange characteristics of MG-II genotypes. In contrast, the drought-resistant genotype (MG-I) exhibited a robust response to drought stress, characterized by marked upregulation in the antioxidant enzyme genes and activities, which in turn resulted in a decrease in oxidative damage and improved vegetative growth and photosynthetic functions. Additionally, transmission electron microscopy (TEM) revealed that the oxidative damage triggered by drought stress was more severe in the MG-II genotype, which exhibited an irregular chloroplast shape compared to the MG-I. These findings may potentially enhance our comprehension of coping strategies involved in drought stress tolerance and provide materials for future melon breeding and molecular studies.
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