Alelopatia de extratos de diferentes órgãos de mulungu na germinação de alface

Oliveira, Andreya Kalyana de; Coelho, Maria de Fátima Barbosa; Maia, Sandra Sely Silveira; Diógenes, F.E.P; Filho, Sebastião Medeiros

doi:10.1590/s0102-05362012000300020

Cited by 26 publications

(21 citation statements)

References 11 publications

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“…According to Ferreira and Borghetti (2004), allelopathic effects are more evident in characteristics related to growth than in the germination process. Oliveira et al (2012a) confirmed this for Caatinga species with E. velutina flower, bark and seeds extracts and for C. ferrea extracts (OLIVEIRA et al, 2012b) and for Z. joazeiro extracts (Oliveira et al (2012c). This study supports the findings of Ferreira and Borghetti (2004) for melon emergence in sand, which were consequences of the germination process.…”

Section: Resultssupporting

confidence: 86%

“…The release of these compounds can occur via root exudation, leaching or volatilization (REIGOSA et al, 2013). The leaf is the most metabolically active plant organ and thus, possesses a high allelochemical diversity (TUR et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…fruit pulp and peel extracts had adverse allelopathic effects on the germination of lettuce seeds, depending on the concentration ; mulungu (Erythrina velutina Willd.) seed extract reduced the germination of L. sativa seeds, and flower and bark extracts were phytotoxic to lettuce seeds and seedlings (OLIVEIRA et al, 2012a); and jucá (Caesalpinia ferrea Mart. ex Tul.…”

Section: Introductionmentioning

confidence: 99%

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Allelopathy by extracts of Caatinga species on melon seeds

et al. 2016

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The melon crop is of great socioeconomic importance in Brazil and some species from the Caatinga biome show allelopathic effects on other species. The aim of this study was to assess leaf and seed extracts of cumaru (Amburana cearensis (Allemao) A.C. Sm.), the jujube tree (Zizyphus joazeiro Mart.), Jucá (Caesalpinia ferrea Mart. Ex. Tul. Var. Ferrea) and mulungu (Erythrina velutina Willd.) on the emergence of melon seeds (Cucumis melo L.). Leaves and seeds were used to produce extracts for each species at concentrations of a) 1%, b) 0.5% c) 0.25%, d) 0.125% and e) 0% (control). The experiment was conducted with each extract type and its respective concentrations in a completely randomized design, with four replicates, each of 20 seeds. The percentage emergence and rate index, percentage of abnormal seedlings, seedling dry matter and seedling shoot and root length were assessed. Seed extracts of A. cearensis prevented melon germination, whereas the other extracts had no effect on this variable. Leaf extracts of A. cearensis and leaf and seed extracts of Z. joazeiro, C. ferrea and E. velutina resulted in abnormal melon seedlings. The percentage of abnormal melon seedlings exceeded 30% when treated with C. ferrea seed extract at the highest concentration. Most extracts did not affect seedling dry matter, but E. velutina leaf and seed extract increased the dry matter accumulation of melon seedlings and Z. joazeiro seed extract decreased dry matter accumulation at a concentration of 0.25%. The highest concentrations of mulungu and jucá leaf extracts promoted the shoot growth of melon seedlings. The extract from E. velutina seeds negatively affected root length compared to the control, similar to the effect of C. ferrea and E. velutina leaf extracts at the highest concentrations. Extracts of different organs of Caatinga plants can affect the emergence and characteristics related to seedling growth, depending on the concentration. Most extracts did not affect germination or the emergence rate index, but affected seedling growth. Key words: Cucumis melo L. Amburana cearensis. Ziziphus joazeiro. Caesalpinia férrea. Erythrina velutina. ResumoA cultura do melão tem grande importância socioeconômica no Brasil e algumas espécies do bioma Caatinga têm ação alelopática sobre outras espécies. O objetivo do trabalho foi avaliar os extratos de folhas e sementes de cumaru (Amburana cearensis (Allemao) A.C. Sm.), juazeiro (Zizyphus joazeiro Mart.) jucá (Caesalpinia ferrea Mart. ex. Tul. var. ferrea) and mulungu (Erythrina velutina Willd.) na emergência de sementes de melão (Cucumis melo L.). Os tipos de extratos foram os de folhas e sementes para cada espécie em concentrações de a) 1%, b) 0,5%, c) 0,25%, d) 0,125% e e) 0% (testemunha). Cada tipo de extrato com suas respectivas concentrações constituiu um experimento que foi conduzido em delineamento experimental inteiramente casualizado com quatro repetições de 20 sementes. Foram avaliadas a porcentagem e índice de velocidade de emergência, porcentagem de plântulas anormais...

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Allelopathy by extracts of Caatinga species on melon seeds

et al. 2016

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“…These changes lead to physical and temporal modifications in the germination process through changes in the germinability, sync and mean time of germination and growth through development inhibition (Ferreira and Aquila, 2000;Oliveira et al, 2012). As observed by Pereira et al (2014), these results indicated that the roots are more sensitive to phytotoxic than the hypocotyl.…”

Section: Discussionmentioning

confidence: 87%

Phytotoxic potential of young leaves from Blepharocalyx salicifolius (Kunth) O. Berg (Myrtaceae)

et al. 2016

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The loss of leaves by plant species found in the Cerrado (Brazilian savanna) is an energetically expensive process due to adverse environmental conditions and predation by herbivory. The mature leaves have adaptations which minimize these events. However, the young individuals lack these structures and produce high leaf concentrations of secondary metabolites as a form of protection. These compounds can be used in bioprospection of natural herbicides. Thus, this study aimed to evaluate the phytotoxicity of hexane, ethyl acetate and aqueous extracts of young leaves from Blepharocalyx salicifolius (Kunth) O. Berg on the elongation of wheat coleoptiles (Triticum aestivum L.) and evaluate the potential phytotoxic of ethyl acetate extract on germination, growth and cell size of metaxylem of sesame (Sesamum indicum L.) seedlings. The hexane and ethyl acetate extracts inhibited the elongation of wheat coleoptiles at all concentrations; however, the most promising results were observed in coleoptile fragments treated with the ethyl acetate extract. This treatment changed the mean germination time and the synchrony of sesame seeds, inhibited the growth of shoots and roots, reduced the dry weight of seedlings, led to abnormalities in the seedlings and reduced the length of the metaxylem cells in the sesame seedlings. These results demonstrated the phytotoxic potential of young leaf extracts of B. salicifolius and the high phytotoxicity of the ethyl acetate extract in the initial development of S. indicum.Keywords: Triticum aestivum, Sesamum indicum, murta, allelopathy, bioactivity. Potencial fitotóxico de folhas jovens de

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“…Brito et al (2016) utilizando o preparado aquoso de folhas de Myracrodruon urundeuva observaram que quando usada a solução de 75%, houve redução do crescimento da altura das plântulas de cebolinha. Oliveira et al (2012) avaliando interferência alelopática de Erythrina velutina Willd quando utilizado o extrato aquoso de distintas partes dessa espécie, além de observarem muitas anormalidades nas plântulas, evidenciaram que os preparados de cascas proporcionaram os menores valores da altura e da raiz, quando comparada à testemunha.…”

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POTENCIAL ALELOPÁTICO DA ESPÉCIE Leucaena leucocephala (Lam.) SOBRE O ESTABELECIMENTO DE PLÂNTULAS DE Phaseolus lunatus L.

Silva¹,

Brito²,

Pinto³

2017

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RESUMOObjetivou-se identificar uma possível influência alelopática das sementes de Leucaena leococephala no estabelecimento de plântulas de feijão fava. As sementes da espécie florestal foram colhidas na cidade de Serra Talhada -PE. Foram utilizadas a partir do extrato bruto (100%) as diluições de 10; 25; 50 e 75%, além do controle (água destilada). Foi utilizado o delineamento estatístico inteiramente casualizado (DIC) com seis tratamentos e cinco repetições. Os dados foram sujeitos à análise de variância (teste F), quando verificada diferença significativa empregouse a análise de regressão. Foram avaliados parâmetros relacionados à emergência e ao estabelecimento das plântulas. As distintas diluições do extrato aquoso de sementes de leucena não interferiram na formação de plântulas normais de feijão fava, já com relação à velocidade do processo de emergência houve redução com o acréscimo das diluições. Na medida em que houve o acréscimo das diluições, ocorreu redução no tamanho e na matéria seca das plântulas. Logo, não é recomendado a utilização dessas duas espécies em um programa de sistema agroflorestal. PALAVRAS-CHAVE: Extrato aquoso, germinação, interferência alelopática, sistema agroflorestal ALELOPATHIC POTENTIAL OF SPECIES Leucaena leucocephala (Lam.) ON THE ESTABLISHMENT OF SEEDS OF Phaseolus lunatus L.ABSTRACT The objective of this study was to identify a possible allelopathic influence of Leucaena leococephala seeds in the establishment of fava bean seedlings. As seeds of the forest species were harvested in the city of Serra Talhada -PE. A crude extract (100%) was obtained as dilutions of 10; 25; 50 and 75%, in addition to the control (distilled water). A completely randomized design with six treatments and five replications was used. Data are subjected to analysis of variance (F test), when the difference in terms of regression analysis is verified. There are two points of view for

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Alelopatia de extratos de diferentes órgãos de mulungu na germinação de alface

Abstract: Allelopathy of extracts of different organs of coral tree on the germination of lettuce

Cited by 26 publications

References 11 publications

Allelopathy by extracts of Caatinga species on melon seeds

Allelopathy by extracts of Caatinga species on melon seeds

Phytotoxic potential of young leaves from Blepharocalyx salicifolius (Kunth) O. Berg (Myrtaceae)

POTENCIAL ALELOPÁTICO DA ESPÉCIE Leucaena leucocephala (Lam.) SOBRE O ESTABELECIMENTO DE PLÂNTULAS DE Phaseolus lunatus L.

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