Ação alelopática de extratos de embaúba (Cecropia pachystachya) no crescimento de capim-colonião (Panicum maximum)

Hernández-Terrones, Manuel Gonzalo; Morais, Sérgio Antônio Lemos de; Londe, G.B.; Nascimento, Evandro A.; Chang, Roberto

doi:10.1590/s0100-83582007000400013

Cited by 5 publications

(3 citation statements)

References 6 publications

(5 reference statements)

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“…Some studies confirm the low allelopathic effects of root extracts on the germination of target species (Gatti et al 2004, Marchi et al 2008, Sodaeizadeh et al 2009, Ashrafi et al 2009). However, during seedling development, the root extract causes significant morphological changes (Hernández-Terrones et al 2007), especially in root growth (Carmo et al 2007, Wandscheer & Pastorini 2008.…”

Section: Resultsmentioning

confidence: 99%

Allelopathic interference of Sapindus saponaria root and mature leaf aqueous extracts on diaspore germination and seedling growth of Lactuca sativa and Allium cepa

Grisi¹,

Gualtieri²,

Ranal³

et al. 2012

Braz. J. Bot.

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-(Allelopathic interference of Sapindus saponaria root and mature leaf aqueous extracts on diaspore germination and seedling growth of Lactuca sativa and Allium cepa). Sapindus saponaria (soapberry) is a species that presents a great diversity of chemical compounds, such as saponins; however, few studies have examined the allelopathic effect of this species. Therefore, this study provides an evaluation of the allelopathic potential of aqueous extracts of the roots and mature leaves of S. saponaria on the germination of diaspores and seedlings growth of lettuce (Lactuca sativa) and onion (Allium cepa). The aqueous extract was prepared in the proportion of 100 g of dry plant material in 1,000 mL of distilled water (a concentration of 10% w v -1 ), and diluted with distilled water to 7.5, 5.0 and 2.5% concentrations. The mature leaf extracts caused delay and decrease in the germination process of the lettuce and onion diaspores, with inhibitory effect concentration-dependent, while the root extracts showed no allelopathic effects on the germination process. Both extracts caused abnormalities and inhibited the growth of shoot and root seedlings.

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Section: Resultsmentioning

confidence: 99%

Allelopathic interference of Sapindus saponaria root and mature leaf aqueous extracts on diaspore germination and seedling growth of Lactuca sativa and Allium cepa

Grisi¹,

Gualtieri²,

Ranal³

et al. 2012

Braz. J. Bot.

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“…Cecropia pachystachya Trécul (embauba) is a plant in the Urticaceae family (HERNANDEZ-TERRONES et al, 2007). The embauba is also known as the "sloth tree".…”

Section: Introductionmentioning

confidence: 99%

Comparative bromatological analysis of Cecropia glaziovii Snethl leaf and its importance in the nutritional requirement of Bradypus variegatus from São Paulo, Brazil.

Baron

Ferreira

Stabile

et al. 2022

CONJ

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Brazilian landscapes have undergone extreme transformations due to deforestation. Consequently, the size and dynamics of Bradypus variegatus - the brown-throated three-toed sloth - populations are directly affected. These groups of mammals representing the superorder Xenarthra, have herbivorous and even insectivorous habits, showing food selectivity by the tree of the genus Cecropia spp. mainly the red leaves instead of the green ones. It is estimated that the three-fingered Bradypus variegatus consumes 15g of dry food (kg/day) during a dry season. This study aimed to compare by centesimal analysis the green and red leaves of the Embauba tree (Cecropia glazioviiSnethl) to understand the preference for the younger leaf, also known as tender/red. The results obtained for the red and green leaves were respectively: dry matter 21.29% and 31.17%, ashes 9.18% and 11.05%, ethereal extract 0.80% and 2.68%, digestibility 23.14% and 23.15%, Vit C 1.86 mg and 1.35 mg, crude fiber 22.30% and 23.47% protein 16.54% and 14.55%. From these results, it was possible to identify that the red leaf has higher levels of crude protein and moisture, allowing the understanding of the preference of Bradypus variegatus.

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“…The use of Umba uba wood as a precursor for the manufacturing of activated charcoal is advantageous due to the rapid growth of the tree, making it a renewable source of feedstock. The Umba uba tree is characteristic of riparian forests, of large forest clearing, and is found from Mexico until Argentina, being dominant throughout all of the Brazilian territory (Herna´ndez-Terrones et al, 2007). In the literature consulted, no reports were found of its use as a precursor in the preparation of activated carbon, nor of its application in the removal of naphthenic acids in AVK.…”

Section: Introductionmentioning

confidence: 99%

Removal of naphthenic acids using activated charcoal: Kinetic and equilibrium studies

Campos

Barbosa

Rodríguez-Díaz

et al. 2018

Adsorption Science & Technology

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This study proposes the use of activated charcoal made from Umba uba wood as an adsorbent for the removal of naphthenic acid in an aviation kerosene model mixture. The activated charcoal was characterised as mesoporous with a carbon graphite profile and presented pH pzc equal to 10.5. The best working conditions were obtained for activated charcoal levels of <0.09 mm and 300 r min À1. The system reached the equilibrium after 360 min, without significant statistical difference for the pseudo-first-and pseudo-second-order kinetic models. The Weber-Morris and Boyd models corroborated the conclusion that adsorption is not controlled only by the intraparticle diffusion step. For the equilibrium study, the adsorptive capacity obtained was of 1.1 g g À1 , with the Brunauer-Emmett-Teller model better correlating with the experimental data. Given the results obtained, the activated charcoal demonstrated to have a remarkable potential for removing naphthenic acid in an aviation kerosene model mixture.

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Ação alelopática de extratos de embaúba (Cecropia pachystachya) no crescimento de capim-colonião (Panicum maximum)

Cited by 5 publications

References 6 publications

Allelopathic interference of Sapindus saponaria root and mature leaf aqueous extracts on diaspore germination and seedling growth of Lactuca sativa and Allium cepa

Allelopathic interference of Sapindus saponaria root and mature leaf aqueous extracts on diaspore germination and seedling growth of Lactuca sativa and Allium cepa

Comparative bromatological analysis of Cecropia glaziovii Snethl leaf and its importance in the nutritional requirement of Bradypus variegatus from São Paulo, Brazil.

Removal of naphthenic acids using activated charcoal: Kinetic and equilibrium studies

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