EFEITO DO ÁCIDO INDOLBUTÍRICO NO ENRAIZAMENTO DE ESTACAS DE LARANJEIRA CV. VALÊNCIA (Citrus sinensis (L.) OSBECK) SOB CONDIÇÕES INTERMITENTES DE NEBULIZAÇÃO

Abstract

Para avaliar o efeito de cinco concentrações de IBA utilizou-se os substratos areia lavada e cinza de casca de arroz, no enraizamento de estacas cilíndricas e triangulares de laranjeira cv. valência, coletadas em três épocas do ano. Os resultados mostraram que os tratamentos não influenciaram a formação de raízes; a areia foi o melhor substrato para formação de calos sendo a melhor concentração, 4500ppm de IBA para estacas cilíndricas coletadas em maio.<br>To evaluate the effect of five IBA concentrations, on valencia orange cuttings, collected at three dates, washed sand and rice husk ash were used as growing media. The results showed that treatments did not influence rooting; the sand was the best growing medium for callous formation, and the best IBA concentration for cylindric cuttings collected in May was 4500 ppm

Rooting of healthy and CVC-affected 'Valência' sweet orange stem cuttings, through the use of plant regulators

“…Hence, healthy plants presenting less than 20% of rooted cuttings (Fig. 1A) was in agreement with Platt and Opitz (1973), Castro and Kersten (1996) and Rossal and Kersten (1997), who described sweet orange cuttings as difficult-to-root ones.…”

“…On the other hand, the nonresponsive concentrations of plant regulators used could have been below the effective doses. However, Rossal and Kersten (1997) showed that the highest percentage of formed callus in 'Valência' sweet orange cuttings was obtained with 4500 mgL -1 of IBA, and this percentage started falling with higher concentrations. Hence, healthy plants presenting less than 20% of rooted cuttings (Fig.…”