Data/hora: 02/06/2024 16:54:46

Provedor de dados: | 58
País: | Brazil
Título: | Biological control of rice brown spot with native isolates of three Trichoderma species
Autores: | Khalili,Elham; Sadravi,Mehdi; Naeimi,Shahram; Khosravi,Vahid.
Data: | 2012-03-01
Ano: | 2012
Palavras-chave: | Rice brown spot; Biocontrol; Trichoderma harzianum; T. virens; T. atroviride.
Resumo: | Brown spot caused by Bipolaris oryzae is an important rice disease in Southern coast of Caspian Sea, the major rice growing region in Iran. A total of 45 Trichoderma isolates were obtained from rice paddy fields in Golestan and Mazandaran provinces which belonged to Trichoderma harzianum, T. virens and T. atroviride species. Initially, they were screened against B. oryzae by antagonism tests including dual culture, volatile and nonvolatile metabolites and hyperparasitism. Results showed that Trichoderma isolates can significantly inhibit mycelium growth of pathogen in vitro by producing volatile and nonvolatile metabolites Light microscopic observations showed no evidence of mycoparasitic behaviour of the tested isolates of Trichoderma spp. such as coiling around the B. oryzae. According to in vitro experiments, Trichoderma isolates were selected in order to evaluate their efficacy in controlling brown spot in glasshouse using seed treatment and foliar spray methods. Concerning the glasshouse tests, two strains of T. harzianum significantly controlled the disease and one strain of T. atroviride increased the seedling growth. It is the first time that the biological control of rice brown spot and increase of seedling growth with Trichoderma species have been studied in Iran.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100035
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822012000100035
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.43 n.1 2012
Fonte: | info:eu-repo/semantics/openAccess