Abstract:
:AP2/ERF transcription factors play an important role in regulation of the cross-talk between ethylene and jasmonate signaling pathways mediating defense responses of plants to biotic and abiotic stresses. In this study, an AP2/ERF transcription factor gene was isolated and characterized from laticifers of rubber tree by using RACE and real time PCR. The full length cDNA, referred to as HbEREBP1, was 1,095 bp in length and contained a 732 bp open reading frame encoding a putative protein of 243 amino acid residues. The molecular mass of the putative protein is 26.4 kDa with a pI of 9.46. The deduced amino acid sequence had a specific domain of AP2 superfamily and an ethylene-responsive element binding factor-associated amphiphilic repression motif, sharing 42.4, 39.1, and 38.0% identity with that of AtERF11, AtERF4, and AtERF8 in Arabidopsis, respectively. HbEREBP1 expression was down-regulated by tapping and mechanical wounding in the laticifers of adult trees. It was also down-regulated at early stage while up-regulated at late stage upon treatment with exogenous ethephon or methyl jasmonate, which was reverse to the case of defense genes in laticifers of epicormic shoots of rubber tree. Our results suggest that HbEREBP1 may be a negative regulator of defense genes in laticifers.
journal_name
Mol Biol Repjournal_title
Molecular biology reportsauthors
Chen YY,Wang LF,Dai LJ,Yang SG,Tian WMdoi
10.1007/s11033-011-1146-ysubject
Has Abstractpub_date
2012-04-01 00:00:00pages
3713-9issue
4eissn
0301-4851issn
1573-4978journal_volume
39pub_type
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