Efeitos potencialmente alelopáticos dos óleos essenciais de Piper hispidinervium C. DC. e Pogostemon heyneanus Benth sobre plantas daninhas

Silva, Antônio Pedro da; Filho, Souza; Arthur, M. F.; Vasconcelos, Marçal de; Graças, Maria das; Zoghbi, B.; Cunha, Rosiane Lopes da

doi:10.1590/s0044-59672009000200018

Cited by 39 publications

(28 citation statements)

References 15 publications

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“…The biological activity of a given alelochemical depends on both the concentration and the boundary of the affected species response. The inhibition threshold for a given substance is not constant, but is closely related to the sensitivity of the receiving species, processes of plant and environmental conditions (Souza Filho, Vasconcelos, Zoghbi, & Cunha, 2009). …”

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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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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“…We prepared each solution with the same solvent (i.e., hexane or dichloromethane) in which we obtained the extracts. After the solvent evaporated, each plate received 36 seeds and distilled water in the same amount of solution in order to maintain the original concentration (Souza Filho et al, 2009b). To evaluate the extracts, we used a concentration of 10 ppm of each extract and replaced the water in the volume of 3.0 mL.…”

Section: Methodsmentioning

confidence: 99%

Inhibitory Effects of the Lipophilic Extracts and An Isolated Meroditerpene of Brown Alga in Pasture Weeds in the Eastern Amazon Region

et al. 2019

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Two lipophilic extracts and atomaric acid (1), an isolated natural product, were obtained from the marine brown alga Stypopodium zonale (Dictyotaceae) to identify and characterize their potential inhibitory effects on the seed germination, radicle elongation, and hypocotyl development of the weeds Mimosa pudica and Senna obtusifolia. The extracts were prepared with hexane and dichloromethane, and atomaric acid (1) was isolated from hexane extract by way of conventional chromatographic methods. During a 15 days period, germination bioassays were performed at 25 oC with a 12 h photoperiod, whereas radicle elongation and hypocotyl development were assayed at 25 oC with a 24 h photoperiod. After, Petri dishes 9.0 cm in diameter were coated with qualitative filter paper, 25 seeds were placed in a germination chamber, while six pregerminated seeds were placed in the Petri dish for 2-3 days. After 10 days, radicle and hypocotyl extension were measured; and the inhibitory potential of the extracts was assessed at 10 ppm and that of the atomaric acid at 5, 10, 15, and 20 ppm. In both M. pudica and S. obtusifolia, dichloromethane extract achieved the greatest rates of inhibition during seed germination (34% and 22%, respectively), radical germination (38% and 30%, respectively), and hypocotyl development (29% and 22%, respectively). At a concentration of 20 ppm, atomaric acid (1) also demonstrated reduced inhibitory potential, with mean values of 58.67% for M. pudica and 48.67% for S. obtusifolia.

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“…Plant species become responsive to certain compounds because of failures in their defense mechanisms or through damage caused by allelochemicals (Macías et al 2004). These variations result from complex interactions between the plant and those types of compounds, and it is difficult to define standardized behaviors (Vokou et al 2003;Souza Filho et al 2009). Each plant species has its own genetic constitution, and the nature of the compounds (and their concentrations) can interact with plants through different pathways, resulting in diverse responses being observed in assays.…”

Section: Inhibitory Effect Of C Zedoaria Essential Oil On Lettuce Anmentioning

confidence: 99%

Chemical constitution and allelopathic effects of Curcuma zedoaria essential oil on lettuce achenes and tomato seeds

Melo¹,

Sá²,

Oliveira³

et al. 2017

Aust J Crop Sci

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The contamination of food, water, and soils by herbicides, as well as the growing resistance of weeds to these products, has increased demands for alternative methods of weed control that have less impact on the environment and human health. Curcuma zedoaria (zedoary), a species of the Zingiberaceae family, is a promising plant for alternative weed control as it produces an essential oil with herbicidal action. We evaluated the chemical composition of C. zedoaria essential oil and its allelopathic effects on the vigor and germination of lettuce achenes and tomato seeds. The essential oil was extracted from the plant rhizome by hydrodistillation and subjected to gas chromatography-mass spectrometry to identify its component chemical compounds. Bioassays to evaluate allelopathic potential were performed in gerbox-type containers maintained in a refrigerated biochemical oxygen demand incubator at 25°C. The treatments consisted of five essential oil concentrations (0.00, 0.25, 0.50, 0.75, and 1.00%) and two bioindicators (lettuce and tomato). C. zedoaria essential oil comprises monoterpene hydrocarbons (4.63%), oxygenated monoterpenes (25.88%), sesquiterpene hydrocarbons (21.95%), and oxygenated sesquiterpenes (47.54%). The major compounds encountered were 1.8-cineole (15.75%) and epi-curzerenone (18.20%). We believe that the isolated effect of these compounds or the synergism between them may have influenced the observed results. Germination was inhibited in both bioindicator species, but the percentage inhibition was greater in lettuce achenes. Germination rates decreased in lettuce and tomato with increasing concentrations of essential oil, and bioindicator growth was slowed. The root system was more heavily damaged than the hypocotyl, especially in tomato compared to lettuce. These preliminary results indicate that C. zedoaria essential oil has allelopathic effects on seed germination and seedling growth and thus shows potential for weed control.

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Efeitos potencialmente alelopáticos dos óleos essenciais de Piper hispidinervium C. DC. e Pogostemon heyneanus Benth sobre plantas daninhas

Cited by 39 publications

References 15 publications

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

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

Inhibitory Effects of the Lipophilic Extracts and An Isolated Meroditerpene of Brown Alga in Pasture Weeds in the Eastern Amazon Region

Chemical constitution and allelopathic effects of Curcuma zedoaria essential oil on lettuce achenes and tomato seeds

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