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Cho, Moo Je
Ulsan National Institute of Science and Technology
Research Interests
  • Calcium Signaling

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Over-expression of a seed specific hevein-like antimicrobial peptide from Pharbitis nil enhances resistance to a fungal pathogen in transgenic tobacco plants

Cited 41 times inthomson ciCited 43 times inthomson ci
Title
Over-expression of a seed specific hevein-like antimicrobial peptide from Pharbitis nil enhances resistance to a fungal pathogen in transgenic tobacco plants
Author
Koo, JCChun, HJPark, HCKim, MCKoo, YDKoo, SCOk, HMPark, SJLee, SHYun, DJLim, COBahk, JDLee, SYCho, Moo Je
Keywords
Antimicrobial peptide; cDNA clones; Pharbitis nil; Transgenic tobacco
Issue Date
200210
Publisher
SPRINGER
Citation
PLANT MOLECULAR BIOLOGY, v.50, no.3, pp.441 - 452
Abstract
Two hevein-like peptides from the seed of Pharbitis nil, designated Pharbitis nil antimicrobial peptide 1 (Pn-AMP1) and Pn-AMP2, had been purified previously. Both exhibit potent in vitro antifungal activity against a broad spectrum of phytopathogenic fungi. We now report the isolation of two cDNA clones, designated pnAMP-h1 and pnAMP-h2, and the corresponding genomic clones encoding these proteins from mature seeds of P. nil. Comparison of the deduced amino acid sequence to that of the mature protein suggests that the peptides are produced as a prepropeptide consisting of an N-terminal signal peptide, the mature protein and C-terminal domains. The transcripts of the two genes are accumulated seed-specifically, and the maximum transcripts are observed in the mid-to-late stage of seed development. Constitutive over-expression of the pnAMP-h2 cDNA in transgenic tobacco under the control of the cauliflower mosaic virus 35S promoter conferred enhanced resistance against the oomycete Phytophthora parasitica, the causal agent of black shank disease. Thus the Pn-AMPs may play a role in the protection of seeds and may be useful as a novel gene source to engineer plants resistant to fungal pathogens.
URI
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DOI
http://dx.doi.org/10.1023/A:1019864222515
ISSN
0167-4412
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