PMID- 17256175 OWN - NLM STAT- MEDLINE DCOM- 20080903 LR - 20181113 IS - 0040-5752 (Print) IS - 0040-5752 (Linking) VI - 114 IP - 5 DP - 2007 Mar TI - Retrotransposon and gene activation in wheat in response to mycotoxigenic and non-mycotoxigenic-associated Fusarium stress. PG - 927-37 AB - Despite inhibition of protein synthesis being its mode of action, the trichothecene mycotoxin deoxynivalenol (DON) induced accumulation of transcripts encoding translation elongation factor 1alpha (EF-1alpha), class III plant peroxidase (POX), structure specific recognition protein, basic leucine zipper protein transcription factor (bZIP), retrotransposon-like homologs and genes of unknown function in the roots of wheat cultivars CM82036 and Remus. Fusarium head blight (FHB) studies using Fusarium graminearum and its trichothecene-minus (Tri5 ( - )) mutant derivative and adult plant DON tests showed that these transcripts were responsive to both mycotoxigenic- and non-mycotoxigenic-associated Fusarium stress. In tests using the parents 'CM82036', 'Remus' and 14 double-haploid progeny that segregated for quantitative trait locus (QTL) Fhb1 on chromosome 3BS (syn. Qfhs.ndsu-3BS) (from 'CM82036' that confers DON tolerance), bZIP expression was significantly more DON-up-regulated in lines that inherited this QTL. Basal accumulation of the bZIP transcript in spikelets treated with Tween20 (control), DON and in DON-relative to Tween20-treated spikelets was negatively correlated with DON-induced bleaching above (but not below) the treated spikelets (AUDPC(DON)) (r = -0.41, -0.75 and -0.72, respectively; P < or = 0.010). bZIP-specific PCR analysis of 'Chinese spring' and its 3BS deletion derivatives indicated that bZIP is located in chromosomal region(s) other than 3BS. These results, and the fact that a homologous cold-regulated wheat bZIP (wLIP19) maps to group 1 chromosomes suggests that wheat bZIP may participate in defence response cascades associated with Fhb1 and that there is a cross-talk between biotic and abiotic stress signalling pathways. FAU - Ansari, Khairul I AU - Ansari KI AD - Molecular Plant-Microbe Interactions Laboratory, School of Biology and Environmental Sciences, College of Life Sciences, University College Dublin, Belfield, Dublin 4, Ireland. khairul.ansari@ucd.ie FAU - Walter, Stephanie AU - Walter S FAU - Brennan, Josephine M AU - Brennan JM FAU - Lemmens, Marc AU - Lemmens M FAU - Kessans, Sarah AU - Kessans S FAU - McGahern, Angela AU - McGahern A FAU - Egan, Damian AU - Egan D FAU - Doohan, Fiona M AU - Doohan FM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070126 PL - Germany TA - Theor Appl Genet JT - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JID - 0145600 RN - 0 (DNA Primers) RN - 0 (DNA, Plant) RN - 0 (Retroelements) RN - 0 (Trichothecenes) RN - JT37HYP23V (deoxynivalenol) SB - IM MH - Base Sequence MH - DNA Primers/genetics MH - DNA, Plant/genetics MH - Fusarium/*pathogenicity MH - Gene Expression Regulation, Plant/drug effects MH - Genes, Plant MH - Plant Diseases/genetics/microbiology MH - Retroelements/genetics MH - Transcriptional Activation MH - Trichothecenes/toxicity MH - Triticum/drug effects/*genetics/*microbiology MH - Virulence EDAT- 2007/01/27 09:00 MHDA- 2008/09/04 09:00 CRDT- 2007/01/27 09:00 PHST- 2006/02/10 00:00 [received] PHST- 2006/12/21 00:00 [accepted] PHST- 2007/01/27 09:00 [pubmed] PHST- 2008/09/04 09:00 [medline] PHST- 2007/01/27 09:00 [entrez] AID - 10.1007/s00122-006-0490-0 [doi] PST - ppublish SO - Theor Appl Genet. 2007 Mar;114(5):927-37. doi: 10.1007/s00122-006-0490-0. Epub 2007 Jan 26.