Essential oils of Schinus terebinthifolius and S. molle (Anacardiaceae): Mitodepressive and aneugenic inducers in onion and lettuce root meristems

Pawlowski, Ângela; Kaltchuk-Santos, Eliane; Zini, Cláudia Alcaraz; Caramão, Elina Bastos; Soares, Geraldo Luiz Gonçalves

doi:10.1016/j.sajb.2012.03.003

Cited by 63 publications

(36 citation statements)

References 21 publications

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“…These results differ from those of Pawlowski et al (2012) who in similar studies using essential oils of two species of Schinus; S. molle and S. terebinthifolius (tested on onion root meristems) found a decrease in cell division when compared to the negative control. The seedlings exposed to S. terebinthifolius oil were even more affected, with very small cell division averages as compared to those exposed to S. molle oil.…”

Section: Resultscontrasting

confidence: 99%

Allelopathic potential of leaves and flowers extracts of Schinus terebinthifolius Raddi

Fonseca¹,

Tavares²,

Gonçalves³

et al. 2015

Científica

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The objective of this study was to evaluate the cytotoxic and physiological effects of aqueous extracts from both the leaves and flowers of Schinus terebinthifolius Raddi (aroeira mansa), when using lettuce as a test organism. The physiological effect was evaluated by first count, germination, root length (RL) and shoot length (SL) testing. We tested five extract concentrations (0, 12.5, 25, 50 and 100% v/v) with five replicates of 100 seeds per treatment, kept at 25 °C. To analyze cytotoxic effect we assessed the mitotic index. A statistically significant difference in the first count and germination tests, showing a reduction in germination, SL, and RL with increasing concentration, with the 25% extract showing the highest inhibitory effect was observed. The seeds treated with aqueous extracts above 50% presented no germination. The mitotic index did not differ statistically for the various concentrations of aqueous extract S. terebinthifolius. Under the experimental conditions used, the allelopathic activity of the aqueous extract S. terebinthifolius became more significant with increasing concentration, negatively influencing germination, and growth of seedling lettuce (used as the bio-indicator), but causing no change in the process of cell division.Additional keywords: allelopathy; germination; Lactuca sativa; mitotic index. ResumoO objetivo deste trabalho foi avaliar os efeitos citotóxicos e fisiológicos de extratos aquosos das folhas e das flores de Schinus terebinthifolius Raddi (aroeira-mansa), utilizando alface como organismo-teste. O efeito fisiológico foi avaliado através de testes de primeira contagem, germinação e comprimento das raízes (CR) e da parte aérea (CPA). Foram testadas cinco concentrações dos extratos (0; 12,5; 25; 50 e 100% v/v), com cinco repetições de 100 sementes por tratamento e mantidos a 20 ºC. Para análise do efeito citotóxico, foi avaliado o índice mitótico. Houve diferença estatística significativa nos testes de primeira contagem e germinação, apresentando redução na germinação das sementes conforme o aumento da concentração, assim como para CPA e CR, sendo o extrato de 25% com maior efeito inibitório. As sementes tratadas com extratos aquosos das flores apresentaram germinação nula nas concentrações acima de 50%. Com relação ao índice mitótico, os extratos aquosos de aroeira não diferiram estatisticamente. Pode-se concluir que a atividade alelopática dos extratos aquosos de aroeira se torna mais expressiva a partir do aumento da concentração, influenciando negativamente na germinação e no crescimento das plântulas de alface, porém não causando alteração no processo de divisão celular do bioindicador nas condições deste experimento.Palavras-chave adicionais: alelopatia; germinação; Lactuca sativa; índice mitótico.

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Section: Resultscontrasting

confidence: 99%

Allelopathic potential of leaves and flowers extracts of Schinus terebinthifolius Raddi

Fonseca¹,

Tavares²,

Gonçalves³

et al. 2015

Científica

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“…Ultrastructural analysis of wheat seedlings under the influence of C. murale allelochemicals showed significant changes of cell structures, including vacuoles, mitochondria, and cell wall that might be result of increased ROS levels. Vacuolation of cytoplasm is known phenomenon observed in stressed plant cells, including allelopathy (Kaur et al 2005;Pawlowski et al 2012). Gzyl et al (2009) supposed that the volume of vacuoles increase may be in the service of toxic ions capture or phenolic compounds capture, enabling cells to overcome stress conditions.…”

Section: Discussionmentioning

confidence: 99%

Physiological and cell ultrastructure disturbances in wheat seedlings generated by Chenopodium murale hairy root exudate

et al. 2018

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Chenopodium murale L. is an invasive weed species significantly interfering with wheat crop. However, the complete nature of its allelopathic influence on crops is not yet fully understood. In the present study, the focus is made on establishing the relation between plant morphophysiological changes and oxidative stress, induced by allelopathic extract. Phytotoxic medium of C. murale hairy root clone R5 reduced the germination rate (24% less than control value) of wheat cv. Nataša seeds, as well as seedling growth, diminishing shoot and root length significantly, decreased total chlorophyll content, and induced abnormal root gravitropism. The R5 treatment caused cellular structural abnormalities, reflecting on the root and leaf cell shape and organization. These abnormalities mostly included the increased number of mitochondria and reorganization of the vacuolar compartment, changes in nucleus shape, and chloroplast organization and distribution. The most significant structural changes were observed in cell wall in the form of amoeboid protrusions and folds leading to its irregular shape. These structural alterations were accompanied by an oxidative stress in tissues of treated wheat seedlings, reflected as increased level of HO and other ROS molecules, an increase of radical scavenging capacity and total phenolic content. Accordingly, the retardation of wheat seedling growth by C. murale allelochemicals may represent a consequence of complex activity involving both cell structure alteration and physiological processes.

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“…Essential oils are aromatic vegetable oily liquids comprising a mixture of volatile monoterpenes of low molecular weight, sesquiterpenes, and other isoprenes [6].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Antifungal Effect of Chitosan/Pepper Tree (Schinus molle) Essential Oil Bionanocomposites on the Viability of Aspergillus parasiticus Spores

Luque-Alcaraz

Cortez-Rocha

Velázquez-Contreras

et al. 2016

Journal of Nanomaterials

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Chitosan nanoparticles (CS) and chitosan/pepper tree (Schinus molle) essential oil (CS-EO) bionanocomposites were synthesized by nanoprecipitation method and the in vitro antifungal activity against Aspergillus parasiticus spores was evaluated. The shape and size were evaluated by scanning electron microscopy (SEM) and dynamic light scattering (DLS). The surface charge was determined by assessing the zeta potential and the inclusion of essential oil in bionanocomposites using Fourier transform infrared spectroscopy (FT-IR). The effect on cell viability of the fungus was evaluated using the XTT technique and morphometric analysis by image processing. SEM and DLS analysis indicated that spherical particles with larger diameters for CS-EO biocomposites were observed. Zeta potential values were higher (+11.1 ± 1.60 mV) for CS nanoparticles. Results suggest a chemical interaction between chitosan and pepper tree essential oil. The highest concentration of CS-EO complex caused a larger (40–50%) decrease in A. parasiticus viability. The inclusion of pepper tree oil in CS nanoparticles is a feasible alternative to obtain antifungal biocomposites, where the activity that each compound presents individually is strengthened.

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Essential oils of Schinus terebinthifolius and S. molle (Anacardiaceae): Mitodepressive and aneugenic inducers in onion and lettuce root meristems

Cited by 63 publications

References 21 publications

Allelopathic potential of leaves and flowers extracts of Schinus terebinthifolius Raddi

Allelopathic potential of leaves and flowers extracts of Schinus terebinthifolius Raddi

Physiological and cell ultrastructure disturbances in wheat seedlings generated by Chenopodium murale hairy root exudate

Enhanced Antifungal Effect of Chitosan/Pepper Tree (Schinus molle) Essential Oil Bionanocomposites on the Viability of Aspergillus parasiticus Spores

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