Ácido indol acético e ácido indol butírico na clonagem de Cnidoscolus quercifolius Pohl pelo processo de macroestaquia.

Abstract

The faveleira (Cnidoscolus quercifolius Pohl) can be used in various activities, from the recovery of degraded areas to the production of biodiesel. A major difficulty is obtaining the seeds for seedling production. Because of this, cloning of plants has the same purpose and is of critical importance in breaking such barriers. The objective of this study was to evaluate the effect of indole acetic acid (IAA) and Indole Butyric Acid (IBA) on the rooting of Cnidoscolus quercifolius Pohl and to know the influence of different times of the year for collection of stakes. The stakes were collected in three different months of the year 2010 (August, October and November), from the main trunk of the trees, being cut down to about 15 cm long. Concentrations of 0.0, 2.0, 4.0, 6.0, 8.0 and 10.0 g/l of IAA and IBA hormones were applied through liquid. At 180 days of grafting cutting, we analyzed the percentage of live stakes, main root length, dry root and dry shoot mass. The stakes had survival rate of 33.3% and 22.2% when collected in the month of August for the AIA and AIB respectively. A significant difference was observed in respect to the IBA main root length and dry mass of roots. In general, the month of August is the best to collect stakes and the different hormones concentrations (IBA and IAA) have no positive effect on the rooting of Cnidoscolus quercifolius Pohl.