Indução de fitoalexinas em soja e em sorgo e efeito fungitóxico de extratos cítricos sobre Colletotrichum lagenarium e Fusarium semitectum - DOI: 10.4025/actasciagron.v25i2.2062

Márcia Mikie Motoyama; Kátia Regina Freitas Schwan-Estrada; José Renato Stangarlin; Ana Cristina Grade Fiori-Tutida; Carlos Alberto Scapim

doi:10.4025/actasciagron.v25i2.2062

Phytoalexin induction in soybean and sorghum and antimicrobial effect by citric extract on Colletotrichum lagenarium and Fusarium semitectum

Márcia Mikie Motoyama UEM
Kátia Regina Freitas Schwan-Estrada Universidade Estadual de Maringá, Centro de Ciências Agrárias, Agronomia
José Renato Stangarlin UNIOESTE
Ana Cristina Grade Fiori-Tutida UEM
Carlos Alberto Scapim UEM

DOI: https://doi.org/10.4025/actasciagron.v25i2.2062

Abstract

The widespread application of agrotoxics to control crop diseases and pests has caused the human and environmental contamination problems and the selection of resistant pathogens to these chemical products. Thus, the purpose of this work was, by means of citric extracts, (Ecolife⁴⁰ commercial product), to assess the antifungal activity, as well as the induction of phytoalexins in soybean and sorghum, in order to develop an alternative method of phytopathogens control. The effect of concentrations of 1, 10, 100, 1000 and 5000 ppm of citric extract was carried out on Colletotrichum lagenarium and Fusarium semitectum. Besides, the mycelial growth and sporulation, spores germination and dry weight were evaluated. The induction of gliceollins phytoalexins in soybean cotyledons and deoxyanthocyanidins in sorghum mesocotyls was also verified. Through the results obtained, it was verified that citric extract showed antifungal and phytoalexins-inducing activities in all the essays performed. The antimicrobial activity was dosis-dependent, the most efficient being the 5000 ppm of citric extract. The gliceollin accumulation in soybean was greater for the concentration of 5000 ppm of citric extract, while for sorghum, there was a production peak in 100 ppm.

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Author Biography

Kátia Regina Freitas Schwan-Estrada, Universidade Estadual de Maringá, Centro de Ciências Agrárias, Agronomia

possui graduação em Agronomia pela Universidade Federal do Espírito Santo (1979), mestrado em Microbiologia Agrícola pela Universidade Federal de Viçosa (1984) e doutorado em Fitopatologia pela Escola Superior de Agricultura Luiz de Queiroz (1996). Atualmente é professor associado da Universidade Estadual de Maringá; orientador de mestrado e doutorado; Assessor adhoc Acta Scientiarum (UEM), Ciência e Agrotecnologia , Fitopatologia Brasileira e Summa Phytopathologica. Tem experiência na área de Agronomia, com ênfase em Fisiologia do Parasitismo, atuando principalmente nos seguintes temas: controle alternativo, planta medicinal, fungos e indução de resistência. http://lattes.cnpq.br/7333463527916515

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Published

2008-04-23

How to Cite

Motoyama, M. M., Schwan-Estrada, K. R. F., Stangarlin, J. R., Fiori-Tutida, A. C. G., & Scapim, C. A. (2008). Phytoalexin induction in soybean and sorghum and antimicrobial effect by citric extract on Colletotrichum lagenarium and Fusarium semitectum. Acta Scientiarum. Agronomy, 25(2), 491-496. https://doi.org/10.4025/actasciagron.v25i2.2062

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Issue

Vol 25 No 2 (2003)

Section

Agronomy

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