Protocolo para extração de pigmentos foliares em porta-enxertos de videira micropropagados
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Revista Ceres
Abstract
O presente trabalho teve por objetivo o desenvolvimento de um protocolo para extração de pigmentos foliares em dois porta-enxertos de videira, Vitis vinifera x V. rotundifolia e V. riparia. Nesse sentido, foram estudados três métodos de extração de pigmentos foliares para plantas cultivadas in vitro e aclimatizadas. Para isso, foram realizados dois experimentos no esquema fatorial 3 x 3, sendo três métodos de extração (DMSO com incubação por 24 horas,DMSO com incubação por 48 horas e acetona 80%) e número de discos foliares (quatro, cinco e seis) com cinco repetições por tratamento, sendo mensurados os conteúdos de clorofila a, b, totais e de carotenóides. O método de extração de pigmentos foliares baseado em DMSO demonstrou ser tão eficiente quanto o com acetona 80% para a extração de clorofila a e mais eficiente na extração de clorofila b para Vitis vinifera x V. rotundifolia cultivada in vitro e apresentou melhores resultados na extração de clorofilas a e b para ambos os cultivares na fase de aclimatização.
The present work aimed to establish a protocol for extraction of leaf pigments of two grapevine rootstock varieties, Vitis vinifera x V. rotundifolia and Vitis riparia. Three leaf pigment extraction methods were evaluated for in vitro grown plants and those acclimatized. The experiments followed a factorial design 3 x 3, considering three extraction methods (incubation with DMSO for 24 h, incubation with DMSO for 48 h, and 80% acetone ) and number (four, five and six) of 5 mm diameter leaf disks, with five replicates each treatment. a, b, and total chlorophyll and carotenoid levels were quantified. DMSO proved to be as efficient as 80% acetone to extract chlorophyll a, and more efficient to extract chlorophyll b from in vitro cultured Vitis vinifera x V. rotundifolia , and also presented better results for extraction of chlorophyll a and b for both acclimatized cultivars.
The present work aimed to establish a protocol for extraction of leaf pigments of two grapevine rootstock varieties, Vitis vinifera x V. rotundifolia and Vitis riparia. Three leaf pigment extraction methods were evaluated for in vitro grown plants and those acclimatized. The experiments followed a factorial design 3 x 3, considering three extraction methods (incubation with DMSO for 24 h, incubation with DMSO for 48 h, and 80% acetone ) and number (four, five and six) of 5 mm diameter leaf disks, with five replicates each treatment. a, b, and total chlorophyll and carotenoid levels were quantified. DMSO proved to be as efficient as 80% acetone to extract chlorophyll a, and more efficient to extract chlorophyll b from in vitro cultured Vitis vinifera x V. rotundifolia , and also presented better results for extraction of chlorophyll a and b for both acclimatized cultivars.
