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Biological function of A Methyl jasmonate-inducible gene MJI2 in Arabidopsis (Arabidopsis thaliana)
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- Authors
- Advisor
- 최양도
- Issue Date
- 2004
- Publisher
- 서울대학교 대학원
- Keywords
- 애기장대(Arabidopsis thaliana) ; Arabidopsis (arabidopsis thaliana) ; 메칠자스몬산(methyl jasmonate) ; 메칠자스몬산(methyl jasmonate) ; lectin 관련 단백질 ; Lectin-related protein ; 키틴(chitin) ; Chitin ; Alternaria brassicicola ; Alternaria brassicicola
- Description
- 학위논문(석사)--서울대학교 대학원 :농생명공학부,2004.
- Abstract
- Methyl jasmonate (MeJA) is a volatile plant cellular regulator that modulates expression of
various genes involved in diverse developmental and defensive processes. In Arabidopsis DNA
microarray experiment previously performed in our laboratory, numerous MeJA-inducible genes were
screened out. Among them, MJI2 (At3g15356) gene was selected and further characterized in this
study to identify its biological role(s) in MeJA-responsive cellular metabolism. Computer-based
sequence analysis showed that MJI2 protein contains a lectin-like domain. As revealed by
Northern blot analysis, MJI2 was strongly expressed in rosette leaves, stems, and roots.
Moreover, it was observed that MJI2 was induced by MeJA and ethylene treatments, exhibiting
synergistic effect between the two phytohormones on its expression. And MJI2 was induced by
chitin treatments. Transgenic Arabidopsis over-expressing the gene exhibited enhanced resistance
to a fungal pathogen Alternaria brassicicola, which is known to be relied on jasmonate-dependent
defense responses. Thus, our data indicates that MJI2 functions as a MeJA-responsive defenserelated
gene.
- Language
- English
- URI
- http://dcollection.snu.ac.kr:80/jsp/common/DcLoOrgPer.jsp?sItemId=000000054342
https://hdl.handle.net/10371/67609
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