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Fungal metabolite mask the host plant odor of the pine weevil (Hylobius abietis)
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
Dept of genetics microbiology and toxicology, Stockholm University.
KTH, Skolan för bioteknologi (BIO), Miljömikrobiologi.
Vise andre og tillknytning
(engelsk)Artikkel i tidsskrift (Annet vitenskapelig) Submitted
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-121992OAI: oai:DiVA.org:kth-121992DiVA, id: diva2:619965
Merknad

QS 2013

Tilgjengelig fra: 2013-05-07 Laget: 2013-05-07 Sist oppdatert: 2013-05-07bibliografisk kontrollert
Inngår i avhandling
1. Microbes Associated with Hylobius abietis: A Chemical and Behavioral Study
Åpne denne publikasjonen i ny fane eller vindu >>Microbes Associated with Hylobius abietis: A Chemical and Behavioral Study
2013 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis is based on three inter-related studies: the first part deals with the microbial consortium, the identification of microbes and their volatiles, the second part deals with the study of bio-chemical control methods of two conifer pests; the pine weevil Hylobius abietis (L.) and the root rot fungi Heterobasidion spp., and the third part describes the production of styrene by a fungus using forest waste.The large pine weevil (Hylobius abietis L.) is an economically important pest insect of conifers in reforestation areas of Europe and Asia. The female weevils protect their eggs from feeding conspecifics by adding frass (mixture of weevil feces and chewed bark) along with the eggs. In order to understand the mechanism behind frass deposition at the egg laying site and to find repellents/antifeedants for pine weevils, microbes were isolated from the aseptically collected pine weevil frass. Microbial produced volatile organic compounds (VOCs) were collected by solid phase micro extraction and analyzed by GC-MS after cultivating them on weevil frass broth. The major VOCs were tested against pine weevils using a multi-choice olfactometer. Ewingella sp., Mucor racemosus, Penicillium solitum, P. expansum, Ophiostoma piceae, O. pluriannulatum, Debaryomyces hansenii and Candida sequanensis were identified as abundant microbes. Styrene, 6-protoilludene, 1-octene-3-ol, 3-methylanisole, methyl salicylate, 2-methoxyphenol and 2-methoxy-4-vinylphenol were the VOCs of persistently isolated microbes. In behavioral bioassay, methyl salicylate, 3-methylanisole and styrene significantly reduced the attraction of pine weevils to their host plant volatiles. Heterobasidion spp. are severe pathogenic fungi of conifers that cause root and butt rot in plants. Bacterial isolates were tested for the antagonistic activity against fungi on potato dextrose agar. Bacillus subtilis strains significantly inhibited the growth of H. annosum and H. parviporum. Styrene is an industrial chemical used for making polymeric products, currently produced from fossil fuel. A strain of Penicillium expansum isolated from pine weevil frass was investigated for the production of styrene using forest waste. Grated pine stem bark and mature oak bark supplemented with yeast extract produced greater amounts of styrene compared to potato dextrose broth.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2013. s. 66
Serie
Trita-CHE-Report, ISSN 1654-1081 ; 2013:23
Emneord
Hylobius, Ewingella, Penicillium, Heterobasidion, Bacteria, Fungi, Bark, Forest waste, Metabolites, Styrene, Methyl salicylate.
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-121887 (URN)978-91-7501-727-3 (ISBN)
Disputas
2013-05-30, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad

QC 20130507

Tilgjengelig fra: 2013-05-07 Laget: 2013-05-06 Sist oppdatert: 2013-05-07bibliografisk kontrollert

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