Universität zu Köln

Kottb, Metwally ORCID: 0000-0002-9486-4074, Gigolashvili, Tamara ORCID: 0000-0002-0416-4796, Grosskinsky, Dominik K. and Piechulla, Birgit (2015). Trichoderma volatiles effecting Arabidopsis: from inhibition to protection against phytopathogenic fungi. Front. Microbiol., 6. LAUSANNE: FRONTIERS MEDIA SA. ISSN 1664-302X

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Abstract

Tnchoderma species are present in many ecosystems and some strains have the ability to reduce the severity of plant diseases by activating various defense pathways via specific biologically active signaling molecules. Hence we investigated the effects of low molecular weight volatile compounds of Trichoderma asperellum IsmT5 on Arabidopsis thaliana. During co-cultivation of I asperellurn IsmT5 without physical contact to A. thaliana we observed smaller but vital and robust plants. The exposed plants exhibit increased trichome numbers, accumulation of defense-related compounds such as H2O2, anthocyanin, camalexin, and increased expression of defense related genes. We conclude that A. thaliana perceives the Trichoderma volatiles as stress compounds and subsequently initiates multilayered adaptations including activation of signaling cascades to withstand this environmental influence. The prominent headspace volatile of T asperellum IsmT5 was identified to be 6-pentyl-alpha-pyrone (6PP), which was solely applied to A. thallana to verify the growth and defense reactions. Most noticeable is that A. thaliana preexposed to 6PP showed significantly reduced symptoms when challenged with Botrytis cinerea and Alternana brassicicola, indicating that defense activated plants subsequently became more resistant to pathogen attack. Together, these results support that products that are based on Trichoderma volatiles have the potential being a useful biocontrol agent in agriculture.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kottb, Metwally UNSPECIFIED orcid.org/0000-0002-9486-4074 UNSPECIFIED Gigolashvili, Tamara UNSPECIFIED orcid.org/0000-0002-0416-4796 UNSPECIFIED Grosskinsky, Dominik K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Piechulla, Birgit UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-392599
DOI:	10.3389/fmicb.2015.00995
Journal or Publication Title:	Front. Microbiol.
Volume:	6
Date:	2015
Publisher:	FRONTIERS MEDIA SA
Place of Publication:	LAUSANNE
ISSN:	1664-302X
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Biology > Botanical Institute
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INDUCED SYSTEMIC RESISTANCE; SECONDARY METABOLITES; NONHOST RESISTANCE; BOTRYTIS-CINEREA; PLANT IMMUNITY; MEDIATED INTERACTIONS; DISEASE RESISTANCE; DEFENSE RESPONSES; TRUFFLE VOLATILES; PROMOTES GROWTH Multiple languages Microbiology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/39259