Aspectos do potencial alelopático do extrato aquoso das folhas de Mimosa ramosissima Benth, na germinação e crescimento inicial de Panicum maximum cv. aruana e Amaranthus retroflexus L.

Bernardes, Victor Angelo Primo; Poletto, Rodrigo de Souza; Alves, Viviane Sandra

doi:10.33448/rsd-v9i9.7757

Cited by 4 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The stimulating effect in low concentrations and the toxic effect in higher concentrations of the shoot aqueous extract from cover crops on GSI, growth and shoot dry matter weight suggests the extract hormesis effect. Similar effect was found by Bernardes et al (2020) when evaluating the potential allelopathic effect of the aqueous extract of the leaves of Mimosa ramosissima Benth, on the germination and initial growth of Panicum maximum cv. aruana and Amaranthus retroflexus L. where at 10% concentration there was a stimulatory effect and higher concentrations hove inhibition.…”

Section: Maizesupporting

confidence: 77%

Allelopathic potential from cover crops aqueous extract on weeds and maize

Reginatto

Bonome

Giovanetti

et al. 2020

RSD

View full text Add to dashboard Cite

Cover crops are used as a strategy to recover degraded soils, improving their physical, chemical and biological characteristics, as well as assisting in the control of weeds through allelochemical compounds released by the shoot degradation process. This work aimed to evaluate the phytotoxicity of the aqueous extract of the cover crops Raphanus sativus L., Avena strigosa (Schreb) and Vicia villosa R. on the germination and initial growth of Zea mays, Amaranthus spinosus L. and Ipomoea grandifolia (Dammer) O'Donnell, as well as to identify and quantify the phenolic compounds present in the extract. Straws from the dried and crushed cover crops were used. The extracts were obtained by mixing 10% R. sativus and A. strigosa, and 12% V. villosa in distilled water (m/v). DIC was used, with four replications, in a 3x4 factorial scheme, with 3 cover crops (R. sativus, A. strigosa and V. villosa) and 4 concentrations (0%, 25%, 50% and 75%). The variables analyzed were: germination, germination speed index (GSI), seedling growth, root protrusion (RP), root protrusion speed index (RPSI) and dry mass of the root and shoot. Higher concentrations of the extracts affected the initial development of maize and weeds. The phenolic compounds identified in greater quantity were benzoic acid, p-coumaric acid, followed by ferulic acid and p-hydroxybenzoic acid. It is suggested that studies of the same nature be carried out in the field, since the interactions between soil microorganisms, climatic conditions can interfere with the results.

show abstract

Section: Maizesupporting

confidence: 77%

Allelopathic potential from cover crops aqueous extract on weeds and maize

Reginatto

Bonome

Giovanetti

et al. 2020

RSD

View full text Add to dashboard Cite

show abstract

“…The toxic effects of the aqueous extracts of W. indica go beyond just inhibiting germination; they are associated with death of the seedling roots evaluated. Many studies with allelopathic compounds bring considerations about the growth and development of the tested species , and many species end up germinating; however, the development is affected, and they cannot become normal adult plants (Da Rocha et al, 2018;Bernardes et al, 2020;Fioresi et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

Allelopatic effects of Waltheria indica L.: Biocontrol potential in ecological restoration

Francisco

Dutra

Viveiros

et al. 2021

RSD

View full text Add to dashboard Cite

In Brazil, most degraded areas are occupied by exotic and invasive species, which require alternatives for their management. We evaluated the allelopathic effects of Waltheria indica in the laboratory from aqueous extracts of leaves and roots on the germination of the species Lactuca sativa L. (lettuce), Urochloa brizantha (Hochst. ex A.Rich.) RDWebster (brachiaria) and Handroanthus chrysotrichus (Mart. ex DC.) Mattos (yellow Ipe). We collected adult one-year-old Waltheria indica shrubs in ecological restoration areas by direct seeding. We used two treatments with aqueous extracts of leaves and roots and a control without extract, with ten repetitions of 10 seeds per treatment, totaling 600 seeds per test species. Germination and use of tetrazolium assays to evaluate the potential respiratory activity of the roots were used. The aqueous extract of W.indica leaves affected the number of germinated seeds of all test species, while the aqueous extract of roots affected only L. sativa and H. chrysotrichus. There were no significant differences between treatments (leaf and root extracts) in species germination. The aqueous extracts of Waltheria indica leaves and roots affected germination and cellular respiration of the studied species, mainly in Lactuca sativa. The identification of W. indica allelopathic compounds may be an initial step so that in the future new bioherbicides are produced from extracts of this species, or even that its seeds can be sown together with non-sensitive native species, aiming for control of exotic species in ecological restoration projects.

show abstract

“…A alelopatia representa um mecanismo pelo qual determinadas plantas interferem no desenvolvimento de outras, alterando seu padrão e densidade (Smith, 1989). O controle de B. pilosa, E. heterophylla, entre outras espécies são descritos com resultados satisfatórios na literatura (Barbosa et al, 2018;Bernardes et al, 2020;Paula et al, 2020). A campo, há relatos de redução de 59% na densidade populacional de plantas daninhas através de estratégias alelopáticas (Arif et al, 2015).…”

Section: Resultsunclassified

Levantamento fitossociológico de plantas daninhas em cultivo de couve-folha em consorciação com quiabeiro em sistema de produção orgânico

Sackser

Barbosa

Echer

et al. 2021

RSD

View full text Add to dashboard Cite

O objetivo deste trabalho foi realizar o levantamento fitossociológico de plantas daninhas no cultivo de couve-folha em consorciação com o quiabeiro. O experimento foi conduzido em blocos casualizados, com quatro repetições. Os tratamentos foram constituídos pelos seguintes arranjos: T1 (três linhas de couve com quiabeiro nas entrelinhas), T2 (três linhas de couve com quiabeiro a cada duas entrelinhas), T3 (três linhas de couve com quiabeiro adensado nas entrelinhas), T4 (três linhas de couve com quiabeiro adensado a cada duas entrelinhas), T5 (couve), T6 (quiabeiro), T7 (quiabeiro adensado) e T8 (palhada de aveia). Aos 17 dias após o transplante (DAT) e em intervalos quinzenais até 152 DAT foram realizadas amostragens com quadro de 0,09 m2, aleatoriamente em cada parcela. As plantas daninhas foram quantificadas e identificadas estabelecendo-se o número total de indivíduos e a densidade total de plantas por m². Ao final de 77 e 152 DAT estabeleceu-se a frequência absoluta, frequência relativa, densidade absoluta, densidade relativa, abundância absoluta, abundância relativa e o índice de valor de importância das espécies mais representativas. Identificou-se 23 espécies distribuídas em 14 famílias, destacando a família Asteraceae, com 5 espécies. As espécies mais importantes foram Sonchus oleraceus e Richardia brasilenses, presentes em no mínimo 5 dos 8 tratamentos. O consórcio T1, teve redução de 38% no número de indivíduos e de 37,9% na densidade de plantas por m² em relação ao cultivo de couve-folha solteiro. O consórcio de couve-folha com quiabeiro reduz a infestação de plantas daninhas e pode ser explorado como alternativa de manejo.

show abstract

Aspectos do potencial alelopático do extrato aquoso das folhas de Mimosa ramosissima Benth, na germinação e crescimento inicial de Panicum maximum cv. aruana e Amaranthus retroflexus L.

Cited by 4 publications

References 10 publications

Allelopathic potential from cover crops aqueous extract on weeds and maize

Allelopathic potential from cover crops aqueous extract on weeds and maize

Allelopatic effects of Waltheria indica L.: Biocontrol potential in ecological restoration

Levantamento fitossociológico de plantas daninhas em cultivo de couve-folha em consorciação com quiabeiro em sistema de produção orgânico

Contact Info

Product

Resources

About