Volume 17, Issue 3 e1900694
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Chemical Characterization and Phytotoxic Effects of the Aerial Parts of Ruzigrass (Urochloa ruziziensis)

Beatriz Pereira Moreno

Beatriz Pereira Moreno

Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5.790, 87020-900 Maringá, Paraná, Brazil

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Gislaine Cristiane Mantovanelli

Gislaine Cristiane Mantovanelli

Departamento de Bioquímica, Universidade Estadual de Maringá, Av. Colombo, 5.790, 87020-900 Maringá, Paraná, Brazil

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Letycia Lopes Ricardo

Letycia Lopes Ricardo

Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5.790, 87020-900 Maringá, Paraná, Brazil

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Adriano Antônio Silva

Adriano Antônio Silva

Departamento de Ciências da Natureza, Universidade Federal do Acre, BR-364 KM 04, 69915-900 Rio Branco, Acre, Brazil

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Rubem Silvério De Oliveira Jr.

Rubem Silvério De Oliveira Jr.

Departamento de Agronomia, Universidade Estadual de Maringá, Av. Colombo, 5.790, 87020-900 Maringá, Paraná, Brazil

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Emy Luiza Ishii-Iwamoto

Emy Luiza Ishii-Iwamoto

Departamento de Bioquímica, Universidade Estadual de Maringá, Av. Colombo, 5.790, 87020-900 Maringá, Paraná, Brazil

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Maria Helena Sarragiotto

Maria Helena Sarragiotto

Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5.790, 87020-900 Maringá, Paraná, Brazil

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Debora Cristina Baldoqui

Corresponding Author

Debora Cristina Baldoqui

Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5.790, 87020-900 Maringá, Paraná, Brazil

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First published: 05 February 2020
Citations: 5

Abstract

Studies of the phytotoxic effects between plants can be a crucial tool in the discovery of innovative compounds with herbicide potential. In this sense, we can highlight ruzigrass (Urochloa ruziziensis), which is traditionally used in the crop rotation system in order to reduce weed emergence. The aim of this work was to characterize the secondary metabolites of ruzigrass and to evaluate its phytotoxic effects. In total, eight compounds were isolated: friedelin, oleanolic acid, α-amyrin, 1-dehydrodiosgenone, sitosterol and stigmasterol glycosides, tricin and p-coumaric acid. Phytotoxic effects of the crude methanolic extract and fractions of ruzigrass were assessed using germination rate, initial seedling growth, and biomass of Bidens pilosa, Euphorbia heterophylla and Ipomoea grandifolia. Chemometric analysis discriminated the weed species into three groups, and B. pilosa was the most affected by fractions of ruzigrass. The phytotoxic activities of 1-dehydrodiosgenone, tricin, and p-coumaric acid are also reported, and p-coumaric acid and 1-dehydrodiosgenone were active against B. pilosa.

Graphical Abstract

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