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Avaliar o efeito do conforto hídrico na morfologia e bioquímica do Cardo
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Abstract(s)
O cardo é uma planta perene que cresce naturalmente em condições de habitat difíceis com temperaturas elevadas e stress hídrico no verão. A tolerância ao stress hídrico, é devida às características do seu sistema radicular, da morfologia da planta e das adaptações. Tradicionalmente, as flores do cardo são utilizadas para a produção de queijos de ovelha. Além das aplicações tradicionais, a Cynara cardunculus tem sido também referida como uma cultura multifunções, devido aos seus elevados teores de inulina na raiz, celulose e hemicelulose nos caules nomeadamente para a produção de celulose e pasta de papel, como biocombustível sólido, produção de biogás e de bioetanol e também na medicina popular com o uso de infusões devido aos efeitos hepatoprotetores e coleréticos.
Este trabalho teve como objetivo a avaliação do comportamento do cardo, Cynara cardunculus L. var. altilis DC, sujeitos a diferentes regimes hídricos, regado e não regado, de modo a compreender em que medida a rega pode ser um fator diferenciador no seu perfil bioquímico e qual o seu efeito na ação coagulante.
Foram escolhidos dois genótipos, 1M e 3M, instalados em 2017 em oito contentores, dos quais quatro eram regados e os outros quatro não eram regados. A monitorização de água no solo e potencial hídrico das plantas foi realizada semanalmente nas duas modalidades, regados e não regados, com acesso ao DIVINER e Câmara de Scholander.
Foram realizadas em laboratório eletroforeses das flores regadas e não regadas e de flores mais precoces e mais tardias.
Os resultados mostram que a rega determinou algumas diferenças, embora pouco expressivas, ao nível do desenvolvimento vegetativo, mas ao nível do volume e peso das sementes existem diferenças significativas.
Cardoon is a perennial plant that naturally grows in harsh habitat conditions with high temperatures and water stress during the summer. Its tolerance to water stress is due to the characteristics of its root system, the plant's morphology, and its adaptations. Traditionally, cardoon flowers are used for the production of sheep’s cheese. In addition to its traditional uses, Cynara cardunculus has also been referred to as a multifunctional crop, due to its high inulin content in the roots, and the cellulose and hemicellulose in its stems, which are particularly suitable for the production of cellulose and paper pulp, as a solid biofuel, for biogas and bioethanol production, and also in folk medicine, where infusions are used for their hepatoprotective and choleretic effects. This study aimed to evaluate the behavior of cardoon, Cynara cardunculus L. var. altilis DC, under different water regimes, irrigated and non-irrigated, in order to understand the extent to which irrigation can be a differentiating factor in its biochemical profile and its effect on coagulating activity. Two genotypes, 1M and 3M, established in 2017 in eight containers, were selected. Four of these containers were irrigated, and the other four were not. Soil moisture and plant water potential were monitored weekly using DIVINER and Scholander chamber in both irrigated and non-irrigated conditions. The flowers from all containers, both from the current year and previous years, were electrophoresed in the laboratory. The results show that irrigation caused some differences in vegetative development, although not very pronounced. However, there are significant differences in seed volume and weight.
Cardoon is a perennial plant that naturally grows in harsh habitat conditions with high temperatures and water stress during the summer. Its tolerance to water stress is due to the characteristics of its root system, the plant's morphology, and its adaptations. Traditionally, cardoon flowers are used for the production of sheep’s cheese. In addition to its traditional uses, Cynara cardunculus has also been referred to as a multifunctional crop, due to its high inulin content in the roots, and the cellulose and hemicellulose in its stems, which are particularly suitable for the production of cellulose and paper pulp, as a solid biofuel, for biogas and bioethanol production, and also in folk medicine, where infusions are used for their hepatoprotective and choleretic effects. This study aimed to evaluate the behavior of cardoon, Cynara cardunculus L. var. altilis DC, under different water regimes, irrigated and non-irrigated, in order to understand the extent to which irrigation can be a differentiating factor in its biochemical profile and its effect on coagulating activity. Two genotypes, 1M and 3M, established in 2017 in eight containers, were selected. Four of these containers were irrigated, and the other four were not. Soil moisture and plant water potential were monitored weekly using DIVINER and Scholander chamber in both irrigated and non-irrigated conditions. The flowers from all containers, both from the current year and previous years, were electrophoresed in the laboratory. The results show that irrigation caused some differences in vegetative development, although not very pronounced. However, there are significant differences in seed volume and weight.
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Keywords
Cardo Cynara cardunculus L. var. altilis (DC) Perfil bioquímico Genótipo 1M Genótipo 3M Rega do cardo Cardoon Biochemical profile Genotype 1M Genotyp 3 M Irrigated and non-irrigated
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