Phytotoxic substances with allelopathic activity may be central to the strong invasive potential of Brachiaria brizantha

Kato‐Noguchi, Hisashi; Kobayashi, Ai; Ohno, Osamu; Kimura, F; Fujii, Yoshiharu; Suenaga, Kiyotake

doi:10.1016/j.jplph.2013.11.010

Cited by 39 publications

(45 citation statements)

References 34 publications

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“…A similar mechanism of plant immune stimulation probably was also activated, when plants were sequentially inoculated, both in the seed and by soil drench, inhibiting growth promotion, could be related to the allelopathic potential of Brachiaria (Syn. Urochloa) [16] [17]. Under this condition, allelopathy can also affect the rhizosphere microbial community, and may be the cause of the observed lower Bacillus spp.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Pseudomonas fluorescens and Burkholderia pyrrocinia on the Growth Improvement and Physiological Responses in Brachiaria brizantha

Lopes¹,

Filho²,

Castro³

et al. 2018

AJPS

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The use of beneficial microorganisms in forage grasses is a potentially advantageous technique for a more sustainable pasture management by decreasing the need for chemical fertilization. Our aims were to determine the best method of microorganism inoculation on Brachiaria (Syn. Urochloa) brizantha cv. BRS Piatã, compare the responses of inoculated plants of this forage grass with fertilized and unfertilized controls and examine its effect on some morphological, physiological and biochemical responses. On the first experiment, three inoculation methods were tested: in the seed, seed and soil, and soil,

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Section: Discussionmentioning

confidence: 99%

“…However, Brachiaria genus is known to be very allelopathic [16] [17]. This may deter the establishment of beneficial microorganisms in the rhizosphere [6].…”

Section: Lizers [2] [3] [4] [5]mentioning

confidence: 99%

Effect of Pseudomonas fluorescens and Burkholderia pyrrocinia on the Growth Improvement and Physiological Responses in Brachiaria brizantha

Lopes¹,

Filho²,

Castro³

et al. 2018

AJPS

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“…Por outro lado, alterações na divisão celular observadas principalmente na prófase, podem ser prejudiciais às células, pois podem levar a proliferação celular desordenada e formação de calos em raízes (Leme & Marin-Morales, 2009).…”

Section: Alface -L Sativa Lunclassified

“…Além de contribuir para o aumento da produtividade agrícola, alguns autores sugerem que estes compostos com atividade fitotóxica podem ser mais seletivos, biodegradáveis e menos poluentes que os herbicidas tradicionais (Macías et al, 2000). Bioensaios preliminares realizados em laboratório avaliando o potencial fitotóxico destes compostos sobre espécies comerciais, como Lactuca sativa (alface), vêm sendo realizados (Trevisan et al, 2012;Paula et al, 2014;Rial et al, 2014;Kato-Noguchi et al, 2014;Wang et al, 2014). As vantagens da utilização da alface nestes; experimentos são a homogeneidade genética, germinação uniforme e fácil disponibilidade, ao contrário das espécies silvestres que são geneticamente mais heterogêneas e apresentam variada sensibilidade, além de falta de homogeneidade na germinação (Macías et al, 2000;Trevisan et al, 2012).…”

Section: Introductionunclassified

Estudo do potencial fitotóxico de extratos de Bauhinia ungulata L. sobre a divisão celular e atividade enzimática em plântulas de alface

Paula

Canteli

Silva

et al. 2015

Rev. bras. plantas med.

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RESUMO:Este trabalho visou avaliar a ação fitotóxica de extrato e frações obtidas das folhas de Bauhinia ungulata L sobre a divisão celular e atividade das enzimas α-amilase, catalase, peroxidase e polifenoloxidase em plântulas de alface (Lactuca sativa, var Grand rapis). Sementes de alface foram expostas às concentrações de 250, 500 e 1000 µg.mL -1 do extrato de Bauhinia ungulata e frações do mesmo, em condições ambientais controladas. Após três dias de protusão radicular, as raízes das plântulas foram cortadas e submetidas a preparo específico para visualização e contagem do número de células em cada fase mitótica. No sétimo dia, as amostras foram submetidas à avaliação da atividade enzimática utilizando técnica específica para cada enzima e leitura espectrofotométrica. Na análise da divisão celular observou-se que houve redução no número de células em mitose nas raízes das plântulas testadas, e a fração acetato de etila apresentou maior efeito inibitório sobre a divisão celular. O efeito sobre as enzimas que demonstram alterações no sistema de defesa antioxidante de L. sativa mostram que o extrato bruto e frações alteraram a produção das enzimas α-amilase, peroxidase, catalase e polifenol oxidase em, ao menos, uma das concentrações testadas, sendo um indicativo de estresse que interfere na divisão celular. Os resultados obtidos apontam para a presença de compostos com atividade inibidora ou estimulatória nas folhas de B. ungulata revelando potencial fitotóxico sobre as plântulas de alface. Palavras-chave:Bauhinia ungulata, catalase, peroxidase.ABSTRACT: Study of phytotoxic potential of extracts of Bauhinia ungulata L. on cell division and enzyme activity in lettuce seedlings. Theaim of this studywas to evaluate thephytotoxic actionofextractand fractionsobtainedfrom the leaves ofBauhiniaungulata L. inbioassaylaboratory, assessing their interferenceon cell division andactivity of the enzymesalpha-amylase, catalase, peroxidase andpolyphenoloxidaseofLactucasativa(lettu ce). The lettuce seedswere exposedto concentrationsof 250,500and 1000μg.mL -1of the extracts and fractions of Bauhinia ungulataunder controlled environmental conditions. After three days ofrootradicleprotrusion, the plants` rootswere cutand subjected tospecific preparationfor visualization andcounting of the number ofcells in eachmitotic stage. On the seventh daythe sampleswere subjected toenzymatic activityusingspecific techniquefor eachenzyme anda spectrophotometer measure. In the analysisof the mitotic indexit was observedthatthere was reduction in the number of cells in mitosis in the roots of the plants tested and thattheethyl acetate fractionsignificantly affected thecell division. The effecton the enzymesthat showed changesinthe antioxidant defensesystemof Lactucasativaindicate thatthe crude extractand the fractionsaltered theproductionofα-amylase, peroxides, catalaseand polyphenol enzymesin at least oneof the testedconcentrations, representingan indicationstress,which interferesin the celldivision.Theobtained results point out the presence ...

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“…Moreover, the extracts from shoots of B. brizantha inhibited the seed germination of Stylosanthes species [31] and seedling growth of cress, lettuce, Phleum pratense and Lolium multiflorum [32]. Allelopathic substances were isolated from Brachiaria brizantha, (6R,9S)-3-oxo-α-ionol, (6R,9R)-3-oxo-α-ionol, 4-ketopinoresinol [32], friedelin and friedelanol [33].…”

mentioning

confidence: 99%

Fluorescence of Chlorophyll a for Discovering Inhibitors of Photosynthesis in Plant Extracts

Carvalho¹,

Salvador²,

Pereira³

et al. 2016

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Phytotoxic substances with allelopathic activity may be central to the strong invasive potential of Brachiaria brizantha

Cited by 39 publications

References 34 publications

Effect of <i>Pseudomonas fluorescens</i> and <i>Burkholderia pyrrocinia</i> on the Growth Improvement and Physiological Responses in <i>Brachiaria brizantha</i>

Effect of <i>Pseudomonas fluorescens</i> and <i>Burkholderia pyrrocinia</i> on the Growth Improvement and Physiological Responses in <i>Brachiaria brizantha</i>

Estudo do potencial fitotóxico de extratos de Bauhinia ungulata L. sobre a divisão celular e atividade enzimática em plântulas de alface

Fluorescence of Chlorophyll <i>a</i> for Discovering Inhibitors of Photosynthesis in Plant Extracts

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Phytotoxic substances with allelopathic activity may be central to the strong invasive potential of Brachiaria brizantha

Cited by 39 publications

References 34 publications

Effect of &lt;i&gt;Pseudomonas fluorescens&lt;/i&gt; and &lt;i&gt;Burkholderia pyrrocinia&lt;/i&gt; on the Growth Improvement and Physiological Responses in &lt;i&gt;Brachiaria brizantha&lt;/i&gt;

Effect of &lt;i&gt;Pseudomonas fluorescens&lt;/i&gt; and &lt;i&gt;Burkholderia pyrrocinia&lt;/i&gt; on the Growth Improvement and Physiological Responses in &lt;i&gt;Brachiaria brizantha&lt;/i&gt;

Estudo do potencial fitotóxico de extratos de Bauhinia ungulata L. sobre a divisão celular e atividade enzimática em plântulas de alface

Fluorescence of Chlorophyll &lt;i&gt;a&lt;/i&gt; for Discovering Inhibitors of Photosynthesis in Plant Extracts

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Effect of <i>Pseudomonas fluorescens</i> and <i>Burkholderia pyrrocinia</i> on the Growth Improvement and Physiological Responses in <i>Brachiaria brizantha</i>

Effect of <i>Pseudomonas fluorescens</i> and <i>Burkholderia pyrrocinia</i> on the Growth Improvement and Physiological Responses in <i>Brachiaria brizantha</i>

Fluorescence of Chlorophyll <i>a</i> for Discovering Inhibitors of Photosynthesis in Plant Extracts