Transcriptomic response of the mycoparasitic fungus Trichoderma atroviride to the presence of a fungal prey.

BMC Genomics
Verena SeidlChristian P Kubicek

Abstract

Combating the action of plant pathogenic microorganisms by mycoparasitic fungi has been announced as an attractive biological alternative to the use of chemical fungicides since two decades. The fungal genus Trichoderma includes a high number of taxa which are able to recognize, combat and finally besiege and kill their prey. Only fragments of the biochemical processes related to this ability have been uncovered so far, however. We analyzed genome-wide gene expression changes during the begin of physical contact between Trichoderma atroviride and two plant pathogens Botrytis cinerea and Rhizoctonia solani, and compared with gene expression patterns of mycelial and conidiating cultures, respectively. About 3000 ESTs, representing about 900 genes, were obtained from each of these three growth conditions. 66 genes, represented by 442 ESTs, were specifically and significantly overexpressed during onset of mycoparasitism, and the expression of a subset thereof was verified by expression analysis. The upregulated genes comprised 18 KOG groups, but were most abundant from the groups representing posttranslational processing, and amino acid metabolism, and included components of the stress response, reaction to nitrogen shortage, signa...Continue Reading

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Methods Mentioned

BETA
environmental stress
PCR

Software Mentioned

CAP3
JGI
TBLASTN
MEGA
BLASTP
MALIGN
Cytoscape
BLASTX
HMMER
BLAST

Related Concepts