Plant biocommunicators: their phytotoxicity, degradation studies and potential use as herbicide models

Macías, Francisco A.; Oliveros‐Bastidas, Alberto; Marı́n, David; Carrera, Ceferino; Chinchilla, Nuria; Molinillo, José M. G.

doi:10.1007/s11101-007-9062-4

Cited by 75 publications

(44 citation statements)

References 117 publications

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“…For several crop species, glufosinate-tolerant cultivars were created through genetic transformation (mainly by overexpression of the gene encoding for glutamine synthase), and their agricultural field is systematically treated with the herbicide. Some plants may develop a natural tolerance to glufosinate, based on its biotransformation through N-acetylation [13].…”

Section: Introductionmentioning

confidence: 99%

Comparative study on growth and photosynthetic pigment dynamics of two microalgae under the influence of water pollution with the herbicide glufosinate

Plugaru¹,

Fodorpataki²,

Orban³

et al. 2017

Studia UBB Chemia

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ABSTRACT. The aim of the study is to compare biochemical and physiological reactions of two related species of green microalgae (Scenedesmus acuminatus and Scenedesmus opoliensis), both considered suitable for bioindication and remediation of aquatic environments polluted with herbicides. Monoalgal axenic cultures were treated for 10 days under controlled conditions with different concentrations (from 0.1 μM to 100 µM) of glufosinate (a nonselective contact herbicide that inhibits glutamine synthase activity, thus disturbing photorespiration, inhibiting photosynthetic carbon assimilation, and generating ammonium excess in plant cells). S. opoliensis was found to be a better indicator of adverse effects of glufosinate than S. acuminatus. Changes in the ground chlorophyll fluorescence (reflecting light energy harvesting capacity), in cell division rate and in chlorophyll-a content may be early, costeffective and sensitive markers of herbicide impact on microalgal communities inhabiting polluted water. Our results bring new data concerning the need of selection among related test organisms based on differentiated tolerance, as well as concerning biochemical parameters suitable for evaluation of water pollution impact when organic xenobiotics accumulate in aquatic environments. Thus, the presented results may be applied in optimizing bioindication of water quality using microalgae, and in treatment of wastewater polluted due to agricultural practices.

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Section: Introductionmentioning

confidence: 99%

Comparative study on growth and photosynthetic pigment dynamics of two microalgae under the influence of water pollution with the herbicide glufosinate

Plugaru¹,

Fodorpataki²,

Orban³

et al. 2017

Studia UBB Chemia

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“…Allelopathy, as a phenomenon of the interactions between plants and other nearby organisms mediated by chemical agents, constitutes a valuable source of natural products with potential use in the agrochemical industry (Macías et al, 2008). Species with phytotoxic properties can be used in different ways for ecological management in agriculture.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in phytotoxicity of Drimys brasiliensis Miers

Anese¹,

Grisi²,

Jatobá³

et al. 2014

Idesia

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Drimys brasiliensis Miers (Winteraceae), commonly called casca d'anta, is found in the Atlantic Forest and in Cerrado domain. It is considered an important source of natural compounds with pharmacological properties, however little is known about their phytotoxic potential on other plants. This study aims to evaluate the phytotoxic effects of D. brasiliensis leaf extracts collected in two seasons (dry and rainy) on the germination and seedling growth of Sesamum indicum L., as well as evaluating the effect of the most active extract on metaxylem cell size in the roots of the target species. The aqueous extract was prepared with 10 g of dried, ground leaves dissolved in 100 mL of distilled water, resulting in a 10% extract concentrate. Dilutions were made with distilled water to 7.5; 5.0; 2.5% and 0% (control). The leaf extracts showed phytotoxicity on germination and early growth of sesame, with more pronounced activity in leaves collected in the dry season. The inhibitory effects were observed at the cellular level in sesame roots, with a significant reduction in the size of the metaxylem cells in the presence of all concentrations of leaf extract. The extract from leaves of D. brasiliensis may constitute a promising source in the search for natural phytotoxins for use in sustainable agriculture practices.Key words: inhibition, seasonality, germinability, metaxylem, sesame. RESUMEN Drimys brasiliensis

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“…The development of new bioactive molecules with potential application in pharmacology and agriculture by using natural products as templates has been a widely used in the recent years. The potential of phytochemicals and allelochemicals (natural plant toxins) in agriculture has been the subject of research with the main purpose of finding phytotoxic substances to use as new herbicidal templates (MACÍAS et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Potencial alelopático dos frutos maduros de Solanum lycocarpum A. St. Hil. (Solanaceae)

Morais

Silva

Oliveira

et al. 2013

BBR - Biochem. Biotechnol.

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The species Solanum lycocarpum A. St. Hil., popularly known as the "fruit of the wolf", is widely distributed in the Brazilian Cerrado. The fruits are usually consumed 'in natura' or used in jellies, jams or pasta preparations. The objective of this study was to evaluate the allelopathic potential of ethanol extract and fractions obtained from ripe fruits of S. lycocarpum against seeds of onion and lettuce. The ethanol extract and fractions showed allelopathic potential, especially on the growth of radicle of Allium cepa (onion). The dichloromethane and hydroethanol fractions showed inhibitory activity on the growth of hypocotyl of lettuce in concentrations at 125 and 250 g/mL. The hydroethanol fraction inhibited growth of radicle of lettuce, at the three concentrations tested. At the concentration of 500 g/mL, the dichloromethane fraction inhibited the radicle of lettuce in 86%. The ethanol extract and fractions showed inhibitory activity on hypocotyl of onion, in concentration at 500 g/mL, and radicle at the three concentrations tested. The dichloromethane fraction showed better allelopathic activity on the growth of lettuce and onion seeds. These results should encourage additional studies of extract and fractions from the ripe fruits of S. lycocarpum for the isolation of bioactive compounds with allelopathic potential.Keywords: Solanum lycocarpum; ripe fruits; allelopathic. RESUMOA espécie Solanum lycocarpum A. St. Hil., popularmente conhecida como "frutodo-lobo", é amplamente distribuída no Cerrado brasileiro. Os frutos geralmente são consumidos 'in natura' ou utilizados em geleias, compotas ou na preparação de massas. O objetivo deste estudo foi avaliar o potencial alelopático do extrato etanólico e frações obtidas dos frutos maduros de S. lycocarpum sobre as sementes de alface e cebola. O extrato etanólico e frações apresentaram potencial alelopático, especialmente sobre o crescimento da radícula de Allium cepa (cebola). As frações diclorometânica e hidroetanólica inibiram o hipocótilo de alface nas concentrações de 125 e 250 g/mL. A fração hidroetanólica inibiu o crescimento da radícula de alface nas três concentrações testadas. Na concentração de 500 g/mL, a fração diclorometânica inibiu a radícula em 86%. O extrato etanólico e frações apresentaram atividade inibitória sobre o hipocótilo da cebola na concentração de 500 g/mL e da radícula nas três concentrações testadas. A fração diclorometânica apresentou maior atividade alelopática sobre o crescimento das sementes de alface e cebola. Estes resultados incentivam estudos adicionais com o extrato e as frações dos frutos maduros de S. lycocarpum para o isolamento de compostos bioativos com potencial alelopático.Palavras-chave: Solanum lycocarpum; frutos maduros; alelopático.

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Plant biocommunicators: their phytotoxicity, degradation studies and potential use as herbicide models

Cited by 75 publications

References 117 publications

Comparative study on growth and photosynthetic pigment dynamics of two microalgae under the influence of water pollution with the herbicide glufosinate

Comparative study on growth and photosynthetic pigment dynamics of two microalgae under the influence of water pollution with the herbicide glufosinate

Seasonal variation in phytotoxicity of Drimys brasiliensis Miers

Potencial alelopático dos frutos maduros de Solanum lycocarpum A. St. Hil. (Solanaceae)

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