RESUMO
In a Vitis vinifera L. vineyard, located in Jales, SP, some plants of the cultivar "Italia" showed in 1993 different characteristics of this and of other cultivars of the same genus. In a given branch, flowers presented anthesis from the apex to the basis, a situation opposite to the normally found. Flowers presented short pedicel, almost sessile; the corolla, at anthesis did not form a calyptra (apical dehiscence), the filaments were short, the stygma was sessile, the ovary was globose, and the nectaries were little developed. It is suggested that ontogenetical changes occurred establishing these unusual characteristics for this genus, although they were also present in correlated genera such as Cissus, Parthenocissus and Ampelopsis (Vitaceae).
Em cultura de videira (Vitis vinifera L. `Italia') foram observadas em Jales, SP, no ano agrícola de 1993, plantas que apresentavam características morfológicas diferentes desse cultivar e de outras espécies deste gênero. Num mesmo ramo da planta, a ântese ocorria do ápice para a base, sentido oposto ao normalmente encontrado. As flores apresentavam pedicelo curto (quase séssil); a corola, no período da ântese não formava uma caliptra (deiscência apical), os filetes eram curtos, o estigma séssil, o ovário globoso e os nectários pouco desenvolvidos. Sugere-se que tenham ocorrido alterações genéticas, promovendo essas características anormais, que não pertencem a gênero Vitis, porém estão presentes em gêneros correlatos como Cissus, Parthenocissus e Ampelopsis (Vitaceae).
RESUMO
In a Vitis vinifera L. vineyard, located in Jales, SP, some plants of the cultivar "Italia" showed in 1993 different characteristics of this and of other cultivars of the same genus. In a given branch, flowers presented anthesis from the apex to the basis, a situation opposite to the normally found. Flowers presented short pedicel, almost sessile; the corolla, at anthesis did not form a calyptra (apical dehiscence), the filaments were short, the stygma was sessile, the ovary was globose, and the nectaries were little developed. It is suggested that ontogenetical changes occurred establishing these unusual characteristics for this genus, although they were also present in correlated genera such as Cissus, Parthenocissus and Ampelopsis (Vitaceae).
Em cultura de videira (Vitis vinifera L. `Italia') foram observadas em Jales, SP, no ano agrícola de 1993, plantas que apresentavam características morfológicas diferentes desse cultivar e de outras espécies deste gênero. Num mesmo ramo da planta, a ântese ocorria do ápice para a base, sentido oposto ao normalmente encontrado. As flores apresentavam pedicelo curto (quase séssil); a corola, no período da ântese não formava uma caliptra (deiscência apical), os filetes eram curtos, o estigma séssil, o ovário globoso e os nectários pouco desenvolvidos. Sugere-se que tenham ocorrido alterações genéticas, promovendo essas características anormais, que não pertencem a gênero Vitis, porém estão presentes em gêneros correlatos como Cissus, Parthenocissus e Ampelopsis (Vitaceae).
RESUMO
Seventeen medicinal plants used popularly in Brazil for their reputed analgesic properties were tested in mice by the writhing and tail flick methods. All extractions were made in 50% aqueous ethanol at low temperatures. The oral dose administered was always 1 g extract/kg. Significant effects in both tests were produced by Lippia alba, Piper abutiloides, Piper cincinnatoris, Piper lindbergii and Tillandsia usneoides.
Assuntos
Analgésicos , Plantas Medicinais/análise , Animais , Brasil , Avaliação Pré-Clínica de Medicamentos , Feminino , Camundongos , Medição da Dor , Fenóis/análise , Extratos Vegetais/farmacologia , Tempo de Reação/efeitos dos fármacosRESUMO
Twelve medicinal plants used popularly for their reputed analgesic properties were tested in mice by the writhing and tail-flick methods. All extractions were made using 50% aqueous ethanol at low temperatures. The oral dose administered was always 1 g solids/kg. While several extracts showed a positive effect in one of the tests, significant effects in both tests were produced by Serjania communis only. Morphine and acetylsalicylic acid were used as reference drugs.