Allelopathy Activity
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Influence of Phenology and Post-Harvest Processing of Vegetal Material on the Allelopathy of Annoni Grass (Eragrostis plana) Extracts
RESUMO: O estádio fenológico da planta, a quantidade e o processamento do material vegetal são fatores que podem interferir na atividade alelopática dos extratos. Este trabalho teve como objetivo testar o efeito alelopático de extratos aquosos de folhas de capim-annoni (Eragrostis plana), invasora de pastagens naturais. Doze extratos foram elaborados, r
Planta daninha. Publicado em: 08/04/2019
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2. Effects of Allelochemicals from Ficus microcarpaon Chlorella pyrenoidosa
This study was performed in order to isolate and identify unknown allelochemicals from Ficus microcarpa, and to investigate the inhibitory to bloom-forming of green alga Chlorella pyrenoidosa. Through gradient elution, fraction C2, whose inhibition of alga growth in diverse extracts was the strongest was shown to cause significant reductions of maximum quant
Braz. arch. biol. technol.. Publicado em: 2014-08
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3. Interspecific variation in the allelopathic potential of the family Myrtaceae
Allelopathy is a type of biotic interference wherein a plant releases bioactive metabolites into an environment, thereby affecting the adjacent biota. Stressful environments stimulate the production of these metabolites. The present study tests the novel weapons hypothesis, which postulates that species belonging to the same genus and from the same environme
Acta Bot. Bras.. Publicado em: 2013-03
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4. Aleopatia de fungos fitopatogÃnicos sobre plantas invasoras das culturas de soja e milho / Allelopathy of plant pathogenic fungi on invasive plants on the cultures of soybean and corn
Invasive plants can cause problems to the exploitation of agriculture worldwide. The chemical control of these plants has generated several environmental problems, such as the contamination of natural resources, the compromising the food quality, the poisoning of farmers, the development of the weedâs resistance, among others. An alternative to reduce the u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2011
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5. Alelopatia e bioprospecção em Rapanea ferruginea e Rapanea umbellata
Allelopathy is a process that involves primary or secondary metabolites produced by plants and microorganisms, which influences the growth and development of agricultural and biological systems. The intensity of plant allelopathic effects may depend on the hábitat, age and the biotic and abiotic conditions during the seasons in which they were collected. Wh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2011
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6. Potencial alelopático de Sapindus saponaria L. (Sapindaceae) / Allelopathic potential of Sapindus saponaria l. (Sapindaceae)
Studies on allelopathy have been important in understanding the processes by which plants influence their neighborhood by releasing substances of secondary metabolism and its application in agriculture, forestry systems and ecosystem management. The objective of this study was to evaluate the allelopathic potential of aqueous extract of root, fruit, young an
Publicado em: 2010
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7. Avaliação química e das atividades biológicas de Coccoloba mollis
Coccoloba mollis (Polygonaceae) is a plant that is being used as medicine in Londrina (memory herb), this specie has been praised as efficient in the treatment of stress, and as memory modulator. This work presents the chemical evaluation of the root and leaf ethanolic extracts of C. mollis and biological tests. The extracts were submitted to usual chromatog
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2009
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8. Caracterização química dos extratos em diclorometano de Origanum majorana L. na inibição de Panicum maximum
Foram estudados o potencial alelopático dos extratos da raiz, do caule e das folhas de Origanum majorana L.(catinga de mulata), quanto a inibição da germinação de sementes de Panicum maximum (capim-colonião), o ensaio foi realizado em caixas gerbox, com fotoperíodo de 10 horas e 7 dias, com soluções dos extratos diclorometânicos da raiz, caule e fo
Publicado em: 2009
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9. Chemical composition, antibacterial and allelopathic activity of Eugenia uniflora L. and Myrciaria glazioviana (Kiaersk) G. M. Barroso &Sobral (Myrtaceae) essentail oils / Composição química, atividade antibacteriana e alelopática dos óleos essenciais de Eugenia uniflora L. e Myrciaria glazioviana (Kiaersk) G. M. Barroso &Sobral (Myrtaceae)
Data are presented concerning the influence of four 2008 distinct periods on content (%), chemical composition, antibacterial and allelopathic activity of Eugenia uniflora and Myrciaria glazioviana essential oils. E. uniflora is a cultivated plant while M. glazioviana is a native plant, both found in Viçosa, Minas Gerais, Brazil. The major constituents iden
Publicado em: 2008
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10. Histoquímica e prospecção de compostos produzidos por Senna alata (L.) Roxb. com potencial atividade alelopática / Histochemistry and prospection of compounds produced by Senna alata (L.) Roxb. with potential allelopathic activity
Um dos aspectos mais explorados da alelopatia, em ecossistemas manipulados, é o seu papel na agricultura. Atualmente, o potencial alelopático de várias plantas tem sido avaliado como um dos métodos de controle alternativo, reduzindo o intensivo uso de herbicidas sintéticos. Em observação de campo, de indivíduos da espécie Senna alata (L.) Roxb., ver
Publicado em: 2008
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11. InfluÃncia de Cladonia salzmanni Nyl sobre fungos micorrÃzicos arbusculares e no desenvolvimento de plÃntulas de Genipa americana L
Lichens are know for being rich in substances considered asseing allelopathic or antimicrobial agents, which can be leached out from lichen by rainfall, and therefore the soil below is enriched by these compounds. Aiming to study the ecological role of these organisms, two experiments were performed. In the experiment 1 the effects of Cladonia salzmannii aga
Publicado em: 2007
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12. Atividade alelopática de extratos aquosos de Aristolochia esperanzae O. Ktze e Ocotea odorifera (Vell) Rohwer na germinação e crescimento de Lactuca sativa L. e Raphanus sativus L. / Allelopathic activity of aqueous extracts of Aristolochia esperanzae O. Ktze in the germination and growth of Lactuca sativa L. and Raphanus sativus L.
The objective of this work was analyze the effects of aqueous extracts of Aristolochia esperanzae organs in the germination and early growth of lettuce and radish. All the prepared extracts obeyed the ratio of 100g of plant material + 300 mL of distilled water to produce an extract 100% concentrated. This extract was diluted with distilled water to produce f
Publicado em: 2003