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Differential expression and characterization of three metallothionein-like genes in Cavendish banana (Musa acuminata) by Pei Liu; Chong-Jin Goh; Chiang-Shiong Loh; Eng-Chong Pua is a Agricultural and Biological Sciences article available to read on EtoBox.

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Metallothioneins (MTs) are cysteine‐rich polypeptides that are involved in metal detoxification and homeostasis in both prokaryotes and eukaryotes. In this study, we report the isolation and characterization of three members (MT2A, MT2B and MT3) of the MT‐like gene family from ripening banana fruit and their differential expression in various banana organs and during fruit development and ripening. All members of the MT‐like gene encode small cysteine‐rich polypeptides of 65–79 amino acid residues. MT2A shared a high sequence similarity (54–77%) with several type‐2 MTs in plants, while MT3 was highly homologous (51–61%) with type‐3 MTs. The three members expressed differentially in various organs but transcripts were generally more abundant in reproductive than vegetative organs. During fruit development, the MT2A transcript was barely detectable in ovary but increased to a high level in young fruit at 20 days after shooting (DAS) and declined gradually thereafter as fruit developed. In contrast, both MT2B and MT3 expressed poorly in young fruits (20–60 DAS) and transcripts were detected only in fruits at later stages of development. As ripening progressed, expression of MT2A decre

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Author

Pei Liu; Chong-Jin Goh; Chiang-Shiong Loh; Eng-Chong Pua

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0031-9317)

Published

2002

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)