Antimicrobial activity of Rosmarinus officinalis extract on Magnaporthe oryzae.

The aim of this research was to evaluate the antimicrobial activity of Rosmarinus officinalis extract on the germination and apresorium formation of Magnaporthe oryzae and its effect in suppressing rice blast severity, in greenhouse conditions

Quantificação das mudanças hormonais promovidas por produtos químicos e microorganismos em arroz (Oryza sativa L.).

utilização de microorganismos em arroz com dupla ação, promoção do crescimento e proteção contra doenças vem sendo extensivamente estudada. Objetivou-se quantificar as mudanças hormonais promovidas por produtos químicos comerciais, duas bactérias e um fungo na cultura do arroz, isolados e em combinação um com o outro

Estudo da herança da resistência a brusone em duas cultivares de arroz (Oryza sativa).

O objetivo do presente trabalho foi de identificar o número de alelos envolvidos na expressão da resistência qualitativa à brusone nas folhas nas cultivares Cica-8 e Metica-1.Conpeex 2010

Microorganisms growth promoters as affecting biomass production and nutrients uptake in upland rice plants.

The objective was to determine the effect of different methods of applying microorganisms, previously identified as growth inducers, on the production of biomass dry matter and nutrient content of upland rice plants.Editors: Andreas Carstensen, Kristian Holst Laursen, Jan Kofod Schjorring

Both MAT1-1 and MAT 1-2 idiomorphs present in rice blast populations (Magnaporthe oryzae) collected in rice fields in northern Brazil.

This is the first study to detect Magnaporthe oryzae rice isolates carrying the MAT1-1 idiomorph in Brazil. Despite the low frequency of the MAT1-1 idiomorph, the study showed that sexual reproduction is possible in the northern riceproducing regions of Brazil

Padronização do extrato de Ruta graveolens L. e avaliação da sua atividade em Magnaporthe oryzae.

O objetivo deste estudo foi padronizar o extrato vegetal líquido de R. graveolens L. e avaliar seu potencial para o controle da brusone em arroz.Apresentação oral - Pós-graduação

Rhizobacteria promoting growth and defense in rice plants against Magnaporthe oryzae.

This study investigated the effect of PGPR in promoting growth of rice roots and suppressing leaf blast (Magnaporthe oryzae)

Variabilidade antagônica in vitro de isolados de Sarocladium oryzae aos principais patógenos do arroz.

O objetivo deste estudo foi avaliar o antagonismo entre isolados de Sarocladium oryzae x Pyricularia oryzae, Sarocladium oryzae x Bipolaris oryzae e Sarocladium oryzae x M. oryzae.Pôster - pós-graduação

Determinação da atividade enzimática de duas importantes proteínas relacionadas à patogênese em plantas de arroz submetidas à indução biótica de resistência contra o fungo Magnaporthe grisea.

Neste trabalho, foram determinadas as atividades enzimáticas das enzimas relacionadas à patogênese: b-1,3-glucanase e peroxidase em plantas de arroz submetidas a tratamento prévio com isolado de Magnaporthe oryzae avirulento ao cultivar de arroz Cica-8, na tentativa de explicar molecularmente, os resultados obtidos com o mesmo tratamento através de avaliação foliar

Plant extract of Ruta graveolens standardized in furanocoumarins: resistance elicitorin rice plants against Magnaporthe oryzae.

We explored furanocoumarin compounds extracted from herb Ruta graveolens to suppress the blast rice disease by eliciting rice systemic resistance pathways. The plant material was subjected to the extraction method by percolation with 80% hydroethanolic solution, which allowed the obtaining of the furanocoumarins, that were monitored by HPLC.Tests were carried out in vitro and in greenhouse. The experimental design was entirely randomized with 24 treatments and 3 replicates.The concentration of 6.75 mg/mL of extract providedthe highest chitinase activity in the period of 24 and 48 hours before inoculation with the pathogen, with the latter referring to 2.67 and 2.70 mg of glic.h -1.mg prot-1, respectively, for chitinase and 6.04 and 7.84 mg of gly.h -1.mg prot-1, respectively for β-1,3-glucanase.The concentrations of 0.7 mg/mL psoralen and 1.2 mg/mL bergapten strongly induced the defense mechanisms of rice plants translating in substantial reduction of disease severity in more than 90%.These results underscore the potential application of a plant extract containing furanocoumarins to mitigate the bursting burden of rice by increasing the mechanisms of systemic resistance. The use of plant extracts allows the reduction of the disease through several different mechanisms, which makes this strategy very efficient and innovative