Potencial alelopático de Panicum maximum JACQ sobre a germinação de sementes de espécies nativas

Rosa, Danielle Medina; Fortes, Andréa Maria Teixeira; Mauli, Márcia Maria; Marques, Denise Sommer; Palma, Denise

doi:10.4322/floram.2011.038

Cited by 9 publications

(14 citation statements)

References 6 publications

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“…The available literature information on how the pH effects seed germination and seedling development basically refers to species from temperate regions. However, these data demonstrate that both germination and seedling development are negatively affected under extremely acid or extremely alkaline conditions (Rosa, Fortes, Mauli, & Marques, 2011).…”

Section: Note A: C Chromatog Chromatogmentioning

confidence: 81%

Phenolic Composition and Allelopathy of Libidibia ferrea Mart. ex Tul. in Weeds

Leandro¹,

Bezerra²,

Rodrigues³

et al. 2019

JAS

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Considering the need to produce effective bioherbicides to control weeds and thus reduce the contamination of environments through the use of agrochemicals in control of these plants, the scientific community has been studying the allelopathic activity of several species of Caatinga, once studies indicate that some species of this biome presentind to have activity allelopathic about other plants. On this, the present study aimed to evaluate the allelopathic potential and phenolic composition of extracts of Libidibia ferrea Mart. ex Tul. on seed germination and seedling development of Calotropis procera (Aiton) WT Aiton. and Cenchrus echinatus L. For the allelopathy test, leaf, bark and root extracts, both hot (100 °C) and cold (25 °C), were used, followed by a control group (distilled H2O). Phytochemical prospecting was performed by High Performance Liquid Chromatography (HPLC). The results showed that the hot L. ferrea bark extract has allelopathic activity on C. procera and C. echinatus, which was observed in all parameters analyzed. The phytochemical results showed that L. ferrea extracts present several phenolic compounds which are possibly responsible for the results observed against the two weed species studied, with standing out Gallic acid, Catechin, Caffeic acid, Ellagic acid, and Quercetin. It is therefore necessary to isolate these compounds in view of a potential future use for L. ferrea extracts in the production of a bioherbicide.

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Section: Note A: C Chromatog Chromatogmentioning

confidence: 81%

Phenolic Composition and Allelopathy of Libidibia ferrea Mart. ex Tul. in Weeds

Leandro¹,

Bezerra²,

Rodrigues³

et al. 2019

JAS

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“…Dentre elas podemos citar Aristida adscensionis, Cenchrus echinatus, Cynodon dactylon, Megathyrsus maximus, Melinis minuti ora, Melinis repens e Urochloa brizantha. Todas são alelopáticas (Rosa et al, 2011;Rodrigues et al, 2012;Araújo e Fabricante, 2013;Araújo et al, 2013a;2013b;Castro et al, 2013;Ribeiro, 2016). Além disso, A. adscensionis, C. echinatus, C. dactylon e M. repens, também causam impactos a agropecuária (Araújo e Fabricante, 2013;Araújo et al, 2013a;2013b;Castro et al, 2013).…”

Section: Discussionunclassified

Invasão Biológica No Parque Nacional Serra De Itabaiana, Sergipe, Brasil

Araújo

Fabricante

2020

R. Ci. Amb.

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O Parque Nacional Serra de Itabaiana é uma Unidade de Conservação que foi criada em 15 de junho de 2005. Apesar de sua elevada riqueza de espécies, está ameaçado devido a uma série de fatores, dentre eles a presença de espécies não nativas. Diante dessa realidade, o presente trabalho buscou responder as seguintes perguntas: (i) quantas são e quem são as espécies naturalizadas e exóticas invasoras que ocorrem no Parque Nacional Serra de Itabaiana? (ii) como essas espécies estão distribuídas no local? As espécies não nativas (naturalizadas e exóticas invasoras) foram coletadas, herborizadas e depositadas no herbário ASE. Com os dados de georreferenciamento foi confeccionado um mapa de manchas de invasão utilizando-se o programa Google Fusion Tables. Ao todo foram amostradas 49 espécies distribuídas em 45 gêneros e 19 famílias. Dentre elas, 16 espécies foram consideradas naturalizadas e 33 exóticas invasoras. Também se observou que os sítios com maiores manchas de espécies estão associados especialmente a ambientes antropizados. Os resultados do presente estudo são alarmantes devido à grande quantidade de espécies não nativas e especialmente pela presença de táxons que causam distintos impactos ambientais.

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“…Then, the material was weighed to prepare the crude extract (100%), according to the ratio of 200g of leaves to each liter of distilled water, which were processed in a blender and filtered with a standard sieve [28]. Next, the crude extract was diluted to produce the other treatments, which were tested for pH in a bench pH-meter, stored in closed recipients, and kept at ambient conditions [42,43].…”

Section: Germination Testmentioning

confidence: 99%

“…Germinated seeds were counted daily from the third day after the start of each test until stagnation in their number. Seeds were considered germinated if their radicle length was longer than 2 mm [42,46,47]. By counting germinated seeds, it is possible to determine the following variables:…”

Section: Data Collection and Analysismentioning

confidence: 99%