Tipos de estacas e uso de AIB na propagação vegetativa de fisális

Abstract

Resumo:Com o presente trabalho objetivou-se avaliar a propagação vegetativa de Physalis angulata L. utilizando-se diferentes tipos de estacas e concentrações de ácido 3-indolbutírico (AIB). Foram avaliadas mudas produzidas a partir de estacas coletadas em plantas matrizes na fase reprodutiva. O delineamento experimental foi em blocos ao acaso, em esquema fatorial 2 x 5, sendo os fatores constituídos por dois tipos de estacas (basal e mediana) e cinco concentrações de AIB (0, 400, 800, 1.200 e 1.600 mg L -1 ), com quatro repetições e cinco estacas por parcela. Aos 20 e 40 dias após o plantio (DAP) foram avaliados:o número de brotações, número de folhas e comprimento da brotação. Aos 60 DAP foram avaliadas: percentagem de sobrevivência, número e comprimento da maior raiz, massa seca de folhas e massa seca total. Aos 20 DAP não foram encontradas diferenças significativas para nenhuma das variáveis analisadas, sendo que aos 40 DAP verificou-se efeito significativo para concentração de AIB para número de folhas. Aos 60 DAP verificouse que é dispensável o uso de AIB, em virtude da pouca eficiência do regulador nas variáveis avaliadas. Recomenda-se a produção de mudas de fisális por estaquia sem utilização do AIB. Palavras-chave: Physalis angulata L. Produção de mudas. Propagação vegetativa.Abstract: The aim of this work was to evaluate vegetative propagation in Physalis angulata L. using different types of cuttings and concentrations of IBA. Seedlings, produced from cuttings collected from parent plants in the reproductive phase, were evaluated. The experimental design was of randomised blocks in a 2 x 5 factorial scheme, with the factors consisting of two types of cutting (basal and medial) and five concentrations of IBA (0, 400, 800, 1,200 and 1,600 mg L -1 ) with four replications and five cuttings per lot. Evaluations were made at 20 and 40 days, of the number of shoots, number of leaves and length of shoots. At 60 days the percentage of survival, the number of roots and length of the largest root, leaf dry weight and total dry weight were evaluated. At 20 days no significant differences were found for any of the variables under analysis, whereas at 40 days, there was a significant effect on the number of leaves for the concentration of IBA only. At 60 days it was found that the use of IBA can be dispensed with, due to the low efficiency in regulating the variables under evaluation. Production of physalis seedlings by cutting is recommended without the use of IBA.

VEGETATIVE PROPAGATION OF Spondias tuberosa E Spondias dulcis WITH THE USE OF IMMERSION IN INDOLE ACETIC ACID

“…Root growth stimulation depends on several factors, mainly auxin concentration; an adequate supply of auxin can increase secondary root formation, generating seedlings with improved adaptive capacity and resistant to climatic variations (OLIVEIRA et al, 2015) The lowest root lengths of the cuttings were found when using the concentrations of 4.1, 4.5 and 4.1 g L -1 , with increases after these points, denoting that the use of IAA was beneficial to the cuttings, despite the low increases found (Figure 2A). The mean increase of 1.21 mm (9%) found when using the concentration of 10 g L -1 generated a greater adaptive advantage for the treated S. tuberosa cuttings.…”

PHYSIOLOGICAL PERFORMANCE OF Physalis angulata L. SEEDS TREATED WITH CHEMICAL PROMOTERS

“…Physalis angulata L. (Solanaceae) is popularly known in the Amazon region as 'camapu'. It is an annual herbaceous plant with high pharmacological and agroindustrial potential (GUIMARÃES et al, 2010;OLIVEIRA et al, 2011) and propagated by seeds (OLIVEIRA et al, 2015). However, because it essentially is a wild species, with continuous flowering and irregular maturation, the occurrence of seeds with different levels of physiological quality (SANTIAGO et al, 2019), as well as low expression of their quality (CARVALHO et al, 2014), is common.…”