title: The role of chitosan in protection of soybean from sudden death syndrome caused by Fusarium solani f. sp. glycines.
abstract: The in vitro antifungal properties of chitosan and its role in protection of soybean from a sudden death syndrome (SDS) were evaluated. Chitosan inhibited the radial and submerged growth of F. solani f. sp. glycines with a marked effect at concentrations up to 1mg/ml indicating antifungal property and at 3mg/ml was able to delay SDS symptoms expression on soybean leaves for over three days after fungal inoculation when applied preventively. Chitosan was able to induce the level of chitinase activity in soybean resulting in the retardation of SDS development in soybean leaves. However, the SDS symptoms gradually appeared and were associated with the reduction of chitinase activity level after five days of infection period. These results suggested the role of chitosan in partially protecting soybeans from F. solani f. sp. glycines infection.
authors.affiliation: Faculty of Environment and Resource Studies, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand. enbrp@mahidol.ac.th <enbrp@mahidol.ac.th>
authors.forename: Benjaphorn
authors.initials: B
authors.lastname: Prapagdee
authors.forename: Kanignun
authors.initials: K
authors.lastname: Kotchadat
authors.forename: Acharaporn
authors.initials: A
authors.lastname: Kumsopa
authors.forename: Niphon
authors.initials: N
authors.lastname: Visarathanonth
mesh_terms: D000704:Analysis of Variance; D000935:Antifungal Agents / Q000494:pharmacology*; D048271:Chitosan / Q000494:pharmacology*; D004790:Enzyme Induction / Q000187:drug effects; D005670:Fusarium / Q000737:chemistry* / Q000187:drug effects; D005998:Glycine / Q000633:toxicity; D010935:Plant Diseases / Q000382:microbiology*; D018515:Plant Leaves / Q000187:drug effects / Q000201:enzymology; D013025:Glycine max
chemical_list: D000935:Antifungal Agents; D048271:Chitosan; D005998:Glycine