Roberto Luis Portz

In vitro Inhibition of Soilborn Phytopathogens Treated With Swine Wastewater

Swine wastewater (SWW) is a residue from pig farming that presents a high load of nutrients and organic matter. The appliance of organic matter in soil alters the microbial dynamic and may suppress soilborn phytopathogens. This study aimed at evaluating the inhibition on mycelial growth of Sclerotinia sclerotiorum and Sclerotium rolfsii in vitro under SWW doses. Hereupon, three kilograms of a soil classified as red dystroferric latosol was collected and sieved. Half of it was autoclaved. SWW was incorporated at doses of 0 mL, 2.5 mL, 5 mL, 10 mL and 20 mL in both soil conditions, autoclaved and not autoclaved. Afterwards, 130 grams of each soil was separately put into Petri plates above what a thin layer (≅ 5 mL) of Water-Agar (2%) medium was carefully spread over. Above this agar layer, one disk (6 mm diameter) of pure mycelium from each fungal grown in Potato Dextrose Agar medium was individually placed on the center of each plate. Daily evaluations on mycelial growth measuring were taken and ended when mycelium in control plates (without SWW addition) reached plate borders. Results indicated that in autoclaved soil condition, the inhibition was proportional to the dose, what is to say that the higher the dose the less the mycelial growth. In not autoclaved soil there was no significant difference among treatments, suggesting stimuli on suppression effect for both pathogens caused by SWW. In addition, the confirmed potential of SWW as a suppressor of S. sclerotiorum and S. rolfsii leads to promising investigations on other phytopathogens hard to control.

Indução de resistência à Macrophomina phaseolina em soja tratada com extrato de alecrim

1 Universidade Estadual do Oeste do Paraná – UNIOESTE, Rua Pernambuco 1777, CP 91, CEP 85960-000, Marechal Cândido Rondon – Paraná – Brasil. jose.stangarlin@unioeste.br; ojkuhn@gmail.com. Universidade Federal do Paraná – UFPR, Rua Pioneiro 2153, CEP 85950-000, Palotina – Paraná – Brasil. roberto.portz@ufpr.br. 3 Bolsista CAPES Autor para correspondência: Eloisa Lorenzetti (eloisa-lorenzetti@hotmail.com) Data de chegada: 10/03/2017. Aceito para publicação em: 15/09/2017. 10.1590/0100-5405/176895

Plant Defense Enzymes Activated in Bean Plants by Aqueous Extract from Pycnoporus sanguineus Fruiting Body

© 2012 Stangarlin et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Plant Defense Enzymes Activated in Bean Plants by Aqueous Extract from Pycnoporus sanguineus Fruiting Body