ScMT10, a metallothionein-like gene from sugarcane, enhances freezing tolerance in Nicotiana tabacum transgenic plants

Feng, Meichang; Yu, Qin; Chen, Yun; Fu, Zhiwei; Xu, Liping; Guo, Jinlong

doi:10.1016/j.envexpbot.2021.104750

Cited by 8 publications

(2 citation statements)

References 52 publications

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“…Plant MT expression can be induced by various stress conditions, including cold [28], drought [23,25], and biotic stress [29]. Furthermore, plants that are overexpressing MTs exhibit higher tolerance to cadmium [30,31], drought [32], freezing, and salt stress [33]. Several studies have shown that the expression of pMTs also changes during plant development [34,35], including seed germination [34,36,37].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Metallothionein Gene Family in Avena sativa L. and the Gene Expression during Seed Germination and Heavy Metal Stress

Konieczna,

Mierek-Adamska,

Chojnacka

et al. 2023

Antioxidants

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Metallothioneins (MTs) are a family of small proteins rich in cysteine residues. The sulfhydryl group of metallothioneins can bind to metal ions, maintaining metal homeostasis and protecting the cells from damage caused by toxic heavy metals. Moreover, MTs can function as reactive oxygen species scavengers since cysteine thiols undergo reversible and irreversible oxidation. Here, we identified 21 metallothionein genes (AsMTs) in the oat (Avena sativa L.) genome, which were divided into four types depending on the amino acid sequences of putative proteins encoded by identified genes. Analysis of promoter sequences showed that MTs might respond to a variety of stimuli, including biotic and abiotic stresses and phytohormones. The results of qRT-PCR showed that all four types of AsMTs are differentially expressed during the first 48 hours of seed germination. Moreover, stress induced by the application of zinc, cadmium, and a mixture of zinc and cadmium affects the expression of oat MTs variously depending on the MT type, indicating that AsMT1-4 fulfil different roles in plant cells.

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Section: Introductionmentioning

confidence: 99%

Characterization of the Metallothionein Gene Family in Avena sativa L. and the Gene Expression during Seed Germination and Heavy Metal Stress

Konieczna,

Mierek-Adamska,

Chojnacka

et al. 2023

Antioxidants

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“…There are some clear indicators that pMTs play a role in drought tolerance, i.e. the increased expression of pMTs in water-limiting conditions has been observed for various plant species [43][44][45][46] , and the expression of several pMTs is regulated by ABA [47][48][49] . We propound the hypothesis that certain pMTs might play essential roles in plant drought resistance.…”

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confidence: 99%

Changes in physio-biochemical parameters and expression of metallothioneins in Avena sativa L. in response to drought

Konieczna

Warchoł

Mierek‐Adamska

et al. 2023

Sci Rep

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Drought is one of the major threats to food security. Among several mechanisms involved in plant stress tolerance, one protein family—the plant metallothioneins (MTs)—shows great promise for enhancing drought resistance. Plant metallothioneins in oat (Avena sativa L.) have not yet been deeply analysed, and the literature lacks a comprehensive study of the whole family of plant MTs in response to drought. In this study, we showed that the number and nature of cis-elements linked with stress response in promoters of AsMTs1–3 differed depending on the MT type. Drought stress in oat plants caused an increase in the expression of AsMT2 and AsMT3 and a decrease in the expression of AsMT1 compared to well-watered plants. Moreover, the low values of relative water content, water use efficiency, net photosynthesis (PN), transpiration (E), stomatal conductance (gs), chlorophyll a, and carotenoid were accompanied by high levels of electrolyte leakage, internal CO2 concentration (Ci) and abscisic acid content, and high activity of antioxidants enzymes in plants under drought stress. The present study puts forward the idea that AsMTs are crucial for oat response to drought stress not only by regulating antioxidant activity but also by changing the plant water regime and photosynthesis. Our results support the hypothesis that structural differences among types of plant MTs reflect their diversified physiological roles.

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Heat shock protein HvHSP16.9 from wild barley enhances tolerance to salt stress

Chang,

Wu,

Shalmani

et al. 2024

Physiol Mol Biol Plants

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ScMT10, a metallothionein-like gene from sugarcane, enhances freezing tolerance in Nicotiana tabacum transgenic plants

Cited by 8 publications

References 52 publications

Characterization of the Metallothionein Gene Family in Avena sativa L. and the Gene Expression during Seed Germination and Heavy Metal Stress

Characterization of the Metallothionein Gene Family in Avena sativa L. and the Gene Expression during Seed Germination and Heavy Metal Stress

Changes in physio-biochemical parameters and expression of metallothioneins in Avena sativa L. in response to drought

Heat shock protein HvHSP16.9 from wild barley enhances tolerance to salt stress

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