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Chemical Characterization and Phytotoxic Effects of the Aerial Parts of Ruzigrass ( Urochloa ruziziensis )
Author(s) -
Pereira Moreno Beatriz,
Mantovanelli Gislaine Cristiane,
Lopes Ricardo Letycia,
Silva Adriano Antônio,
Silvério De Oliveira Rubem,
IshiiIwamoto Emy Luiza,
Sarragiotto Maria Helena,
Baldoqui Debora Cristina
Publication year - 2020
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201900694
Subject(s) - weed , tricin , bidens pilosa , chemistry , germination , allelopathy , stigmasterol , botany , phytotoxicity , seedling , lespedeza , agronomy , biology , organic chemistry , flavonoid , chromatography , antioxidant
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 .