Sorção e persistência da sorgoleona em um Latossolo Vermelho-Amarelo

Demuner, Antônio J.; Barbosa, Luiz C. A.; Chinelatto, Luiz S.; Reis, César; Silva, Antônio Augusto Moura da

doi:10.1590/s0100-40422005000300016

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…Extracts were obtained from pre-flowering plants (60 days after emergence), as also performed in the present study. The allelopathic activity of sorghum crops is mainly due to the action of cyanogenic glycosides, tannins, flavonoids, ferulic acid, syringic acid, and vanillic acid [46]. The major allelochemical was found to be the quinone sorgoleone [47].…”

Section: Discussionmentioning

confidence: 99%

Allelopathic Potential of Plant Aqueous Mixtures on Euphorbia heterophylla

et al. 2020

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Euphorbia heterophylla is a widely distributed weed whose seeds can remain viable in the soil for years, competing with crops. Therefore, natural herbal preparations could be a solution for its more diversified management. This study investigates the efficacy and mode of action of aqueous mixtures of Urochloa ruziziensis stems and Sorghum bicolor roots and stems on E. heterophylla seed germination, seedling development, antioxidant enzyme activity, and respiration. Aqueous mixtures with concentrations of 0 (control), 250, 500, 750 and 1000 ppm were prepared. E. heterophylla seeds were treated with the mixtures and incubated under controlled conditions. Seedling development, respiration, and enzyme activity were assessed after 4 days of incubation and germination was analyzed after 16 days. Urochloa ruziziensis and S. bicolor mixtures presented allelopathic effects on E. heterophylla inhibiting root growth, root fresh and dry weights and induced mitochondrial alterations resulting in oxidative stress, increasing the antioxidant enzymes catalase and peroxidase. U. ruziziensis and S. bicolor aqueous mixtures were found to have potential in controlling the weed E. heterophylla in laboratory tests.

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Section: Discussionmentioning

confidence: 99%

Allelopathic Potential of Plant Aqueous Mixtures on Euphorbia heterophylla

et al. 2020

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“…These compounds are involved in plant-plant interactions or allelopathy [56] and may inluence, for example, in the vegetation of a local, in the succession of plants, in the germination of seeds and in the cultures productivity, among others [57]. Among the main groups of compounds with allelopathic potential are highlighted the benzoquinones, coumarins, lavonoids, terpenoids, glycosides, phenolic acids, alkaloids, rotenoids, catechins and tannins [58,59].…”

Section: Allelopathymentioning

confidence: 99%

Flavonoids: Classification, Biosynthesis and Chemical Ecology

Santos¹,

Maia²,

Ferriani³

et al. 2017

Flavonoids - From Biosynthesis to Human Health

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Flavonoids are natural products widely distributed in the plant kingdom and form one of the main classes of secondary metabolites. They display a large range of structures and ecological signiicance (e.g., such as the colored pigments in many lower petals), serve as chemotaxonomic marker compounds and have a variety of biological activities. Therefore, they have been extensively investigated but the interest in them is still increasing. The topics that will be discussed in this chapter describe the regulation of lavonoid biosynthesis, the roles of lavonoids in lowers, fruits and roots and mechanisms involved in pollination and their speciic functions in the plant.

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“…silva et al (1986) verificaram que não havendo o controle das plantas daninhas nas quatro primeiras semanas após a emergência de algumas culturas de grãos comercialmente importantes, pode ocorrer uma redução na produção na ordem de 35%. Em caso de não se empregar nenhum método de controle, esta redução pode chegar a aproximadamente 71% (eiNhellig;souza, 1992;deMuNer et al, 2005). Neste sentido, o sorgo, que é uma espécie utilizada tanto para produção de grãos quanto como forrageira, torna-se importante por sua reconhecida alelopatia atuando contra as plantas daninhas favorecendo, assim, cultivos mais bioracionais seja quando ela é usada como monocultura, seja quando ela é rotacionada em sistemas consorciados (silva et al, 1986;siNgh et al, 2003).…”

Section: Importância Agronômicaunclassified

Sorgoleone: benzoquinona lipídica de sorgo com efeitos alelopáticos na agricultura como herbicida

et al. 2012

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RESUMOA cultura do sorgo cresceu rapidamente nestes últimos anos, por ser uma planta com características xerófilas, apresentando um aumento de sua produção principalmente na região nordeste devido a sua capacidade de suportar ambientes de cultivo mais secos. As ervas daninhas são um grande problema para os cultivares, pois estas podem reduzir significativamente a produção de grãos, particularmente quando surgem nas fases iniciais das culturas. Visando a obtenção de culturas resistentes às ervas daninhas, estudos têm sido realizados demonstrando que algumas plantas possuem uma defesa natural que consiste na capacidade de um organismo produzir metabólitos que atuam inibindo ou o crescimento ou o desenvolvimento de outros organismos que estão próximos; a esta capacidade dá-se o nome de alelopatia. O sorgo é uma das plantas que possuem sua alelopatia comprovada, produzindo um complexo de substâncias lipídicas e proteínas denominados genericamente de sorgoleone, tendo como seu principal composto o 2-hidroxi-5--metoxi-3-[(Z,Z)-8',11',14'-pentadecatrieno]-p-benzoquinona, que é naturalmente liberado para o solo a partir dos tricomas das suas raízes e, no momento em que entram em contato com as ervas daninhas, inibem seu crescimento. Devido a tais características inerentes à cultura do sorgo, este trabalho tem como objetivo discorrer sobre os possíveis benefícios do uso desse cereal devido a sua comprovada alelopatia, bem como informar os conhecidos mecanismos de produção e atuação dos principais compostos constituintes do sorgoleone produzidos pelas suas raízes.PALAVRAS-CHAVE: Aleloquímicos, quinonas, ervas daninhas, controle biológico, Sorghum bicolor.ABSTRACT SORGOLEONE: LIPIDIC BENZOQUINONE OF SORGHUM WITH ALLELOPATHIC EFFECTS IN AGRICULTURE AS A HERBICIDE. The sorghum crop has grown rapidly in recent years, for being a plant with xerophilous characteristics; its production has especially increased in Northeastern Brazil due to its ability to withstand dry environments. Weeds are a major problem for grain crops, as these can significantly reduce yield, particularly when they emerge in the early stages of crops. To obtain crops resistant to weeds, studies have been conducted to demonstrate that some plants have a natural defense consisting in an organism's ability to produce metabolites that act to either inhibit or stimulate growth and development of other organisms grown in the same environment, which is called allelopathy. Sorghum is one of the plants that possess proven allelopathy, producing a set of lipid complex substances and proteins generically called sorgoleone, having as its main compound 2-hydroxy-5-methoxy-3-[(Z,Z)-8′,11′,14′-pentadecatriene]-p-benzoquinone, which is naturally released into the soil from their roots and trichomes, inhibiting the growth of weeds upon contact with them. Because of these inherent characteristics of the sorghum crop, the present work aims to discuss the possible benefits of using this cereal, due to its allelopathic effects, as well as to inform about the known mechanisms of...

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Sorção e persistência da sorgoleona em um Latossolo Vermelho-Amarelo

Cited by 15 publications

References 24 publications

Allelopathic Potential of Plant Aqueous Mixtures on Euphorbia heterophylla

Allelopathic Potential of Plant Aqueous Mixtures on Euphorbia heterophylla

Flavonoids: Classification, Biosynthesis and Chemical Ecology

Sorgoleone: benzoquinona lipídica de sorgo com efeitos alelopáticos na agricultura como herbicida

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