Efeito alelopático de folhas de bamburral [Hyptis suaveolens (L.) Poit.] sobre a germinação de sementes de sorgo (Sorghum vulgare Pers.), rabanete (Raphanus sativus L.) e alface (Lactuca sativa L.)

Rodrigues, Andréa Maria dos Santos; Artioli, Fabiane Aparecida; Polo, Marcelo; Barbosa, Luiz C. A.; Beijo, Luiz Alberto

doi:10.1590/s1516-05722012000300010

Cited by 13 publications

(12 citation statements)

References 12 publications

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“…Ocimum sanctum and Hyptis suaveolens are aromatic weeds, which are noxious, and world's exotic persistent species invading the natural ecosystems (Rodrigues, et al, 2012). Results of the present study revealed a reduction in seedling height of lettuce under the allelochemical stress of both weed species, which is similar to the earlier reported allelopathic studies (Singh et al, 2013;Rodrigues, et al, 2012).…”

Section: Discussionsupporting

confidence: 90%

“…Lantana camara and Stachytarpheta urticaefolia are notorious and invasive weeds and belong to the Verbenaceae family which retard germination, growth, development or metabolism of crops due to the discharge of allelochemicals (Qasem, 2001). Ocimum sanctum and Hyptis suaveolens are aromatic weeds, which are noxious, and world's exotic persistent species invading the natural ecosystems (Rodrigues, et al, 2012). Results of the present study revealed a reduction in seedling height of lettuce under the allelochemical stress of both weed species, which is similar to the earlier reported allelopathic studies (Singh et al, 2013;Rodrigues, et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

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Screening of allelopathic activity of common weed species occurring in agricultural fields

Kaliyadasa¹,

Jayasinghe²

2018

Afr. J. Agric. Res.

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The investigation of allelopathic effects of different plant species is important to prevent serious crop losses that would arise. The usage of such materials as mulch, cover crops or residues will be useful to implement in integrated weed management strategies of agricultural fields. Therefore, this study was conducted to screen the allelopathic effect of selected plant species using seedlings growth of lettuce (Lactuca sativa L.) as an indicator. The sandwich method was used and 20 mg of dried plant material, resembling the leaf litter, from 27 species were placed in petri dishes. Twenty-eight treatments including the control treatment were arranged in a Completely Randomized Design (CRD). On the fifth day after the establishment of lettuce seeds, hypocotyl length (cm), radicle length (cm) and total height (cm) of seedlings were measured. The inhibitory percentage was calculated and a dendrogram with single linkage was developed. Results revealed that the lowest hypocotyl and radicle lengths with the highest inhibitory percentage were recorded for Ageratum conyzoides, Cassia occidentals and Clidemia hirta when compared to the control treatment (p<0.05). Weed species expressed varying degree of inhibitory effects on growth performances of lettuce seedlings. Further studies need to be carried out to explore the effects of allelopathy on crop plants.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Screening of allelopathic activity of common weed species occurring in agricultural fields

Kaliyadasa¹,

Jayasinghe²

2018

Afr. J. Agric. Res.

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“…6; Regarding the bean seeds exposed to the extract of B. vulgaris, a delay in the germination speed index was observed at the higher concentrations (75 and 100%); this was best suited to a quadratic model (Figure 4). The delay or the reduction in time spent for germination can be transformed into advantages or disadvantages in the field, especially when dealing with a species that has a short life cycle (Rodrigues, Artioli, Polo, Barbosa, & Beijo, 2012). In the study of Dendrocalamus giganteus Munro extract, Schulz et al (2010) obtained significant results when assessing the germination speed of lettuce seeds, thus highlighting the allelopathic potential of this exotic species of bamboo.…”

Section: Greenhouse Bioassaymentioning

confidence: 99%

Biological Activity of Bambusa vulgaris Schrad. ex J.C. Wendl. (Poaceae)

Alencar¹,

Silva²,

Figueiredo³

et al. 2015

JAS

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This study aims to evaluate the allelopathic activity of Bambusa vulgaris Schrad. ex J.C. Wendl., invasive species in an area of Cerrado in the Chapada do Araripe in Ceará. The treatments consisted of the aqueous extract in concentrations of 25, 50, 75 and 100% and a Control (distilled water), with five replicates containing 20 seeds each. The tests were carried out in the laboratory and in a greenhouse, using corn and beans as the test seeds. The parameters analyzed were number of germinated seeds, measurement of caulicle and radical length, occurrence of radicle necrosis and germination speed index (GSI). The results obtained from the laboratory bioassays on corn seeds indicate that the extract affected development of the seedlings, reducing caulicle growth and increasing radicle length, in addition to causing radicle necrosis. Regarding the bean seeds, there was a delay in the GSI, reduced caulicle growth and radicle necrosis. In the bioassay conducted in the greenhouse, for the corn seeds the extract inhibited germination and both caulicle and radicle growth, as well as delaying the GSI. When tested on the beans, the extract provoked reduction in the number of germinated seeds at the higher concentrations, delayed the GSI, reduced the radicle size and caused radicle necrosis. The allelopathic effects observed in the greenhouse were more significant, suggesting that environmental factors in conjunction with the action of the allelochemicals interfered more actively with the seed germination and seedling development of the receptor species.

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“…Several species of the Anacardiaceae family, in which M. urundeuva belongs to, are considered allelopathic (Donnelly et al 2008), due to secondary metabolites derived from the metabolism of plants, and include flavonoids, tannins, steroids, and terpenoids and may be responsible for reducing or even inhibiting the germination of seeds and growth of roots (Li et al 2010, Rodrigues et al 2012. Despite its cytotoxic activity, M. urundeuva extracts did not show mutagenic activity in the A. cepa test and AMES test did not show mutagenic activity of direct action at all concentrations tested in the four strains of S. Typhimurium (TA97a, TA98, TA100, and TA102), as shown by the mutagenicity ratio (less than 2) (Table III) (Maron and Ames 1983).…”

Section: Resultsmentioning

confidence: 99%

In vitro antifungal activity of Myracrodruon urundeuva Allemão against human vaginal Candida species

Oliveira

Rorato

Almeida-Apolonio

et al. 2017

An. Acad. Bras. Ciênc.

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Myracrodruon urundeuva is a plant native to Brazil, which is used by the indigenous population for the treatment of candidiasis. The aims of this study were to evaluate the antifungal activity of extract against human vaginal Candida species and evaluate the possible toxicological activities of M. urundeuva. Initially, ethanol extracts, ethyl acetate fractions, and hydroalcoholic fractions of the bark and leaf of M. urundeuva were used to determine the minimum inhibitory concentration. The extracts that showed antifungal activity were characterized by liquid chromatography and subjected to toxicity assessment. Toxic, cytotoxic, genotoxic, and mutagenic testing were performed using Allium cepa and Ames assays with the ethanol extracts of the bark and leaves. Hemolytic activity was evaluated in erythrocytes and acute toxicity in rats. The ethanol bark extracts showed best activity against Candida albicans, C. krusei, and C. tropicalis ATCC (4-512 µg/mL). Chemical characterization indicated the presence of flavonoids and tannins in the extracts. Hemolytic activity, genotoxicity, and mutagenicity were not observed. The results of the Ames and A. cepa tests were also in agreement, ethanol bark extracts and ethanol leaf extracts of M. urundeuva showed absence of mutagenic activity. Similar results were observed in the A. cepa assay and acute toxicity test in rats. M. urundeuva bark extracts showed potential for the treatment of vaginal infections caused Candida species, as a topical.

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Efeito alelopático de folhas de bamburral [Hyptis suaveolens (L.) Poit.] sobre a germinação de sementes de sorgo (Sorghum vulgare Pers.), rabanete (Raphanus sativus L.) e alface (Lactuca sativa L.)

Cited by 13 publications

References 12 publications

Screening of allelopathic activity of common weed species occurring in agricultural fields

Screening of allelopathic activity of common weed species occurring in agricultural fields

Biological Activity of Bambusa vulgaris Schrad. ex J.C. Wendl. (Poaceae)

In vitro antifungal activity of Myracrodruon urundeuva Allemão against human vaginal Candida species

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