Articles
ROOTING OF PASSION FRUIT SPECIES WITH INDOLE-3-BUTYRIC ACID UNDER INTERMITTENT MISTING CONDITIONS
Article number
894_19
Pages
177 – 183
Language
English
Abstract
In Brazil, the passion flower vine (Passiflora spp.) is basically propagated by seed.
As a result, the high variability of orchards creates a low yield of fruits that lack uniformity and are of poor quality.
It also reduces the plants life span due to the incidence of disease and pests which can be aggravated by self-incompatibility, a common condition with passion fruit species.
With the objective of assessing the effect of different concentrations of indole-3-butyric acid (IBA) on cuttings of different Passiflora species, an experiment was carried out at the Fruit Sector of the University of Brasilia from May 2005 to February 2006. Soft cuttings (20 cm long, 3-5 mm diameter) with a pair of leaves and 4 to 6 buds were removed from an intermediate portion of the shoot of the following bearing species: P. coccinea, P. quadrangularis, P. serrato digitata, P. Edulis f. flavicarpa hybrid EC-2-0, Australian purple passion fruit Supersweet 4 or 25 and P. Nitida hybrid P. coccinea × P. Setacea. The cuttings were soaked for 2 min in an IBA solution with concentrations of 0, 500, 1,000 and 1,500 mg/L and planted 3 to 5 cm deep in polystyrene trays (72 cells) filled with commercial substrate Plantmax HT®: and kept under intermittent misting.
Randomized blocks were used with 4 replications with 12 valid cuttings in a 7×4 factorial arrangement with 7 different species/genotypes and 4 levels of hormone.
The study analyzed the percentage of rooting, the fresh and dry weight of the roots and tops, and the number of shoots and leaves.
IBA at 500 mg/L was found to be the most effective for rooting and vegetative growth of all the species, as well as the hybrid of sour passion fruit and the Australian purple passion fruit.
As a result, the high variability of orchards creates a low yield of fruits that lack uniformity and are of poor quality.
It also reduces the plants life span due to the incidence of disease and pests which can be aggravated by self-incompatibility, a common condition with passion fruit species.
With the objective of assessing the effect of different concentrations of indole-3-butyric acid (IBA) on cuttings of different Passiflora species, an experiment was carried out at the Fruit Sector of the University of Brasilia from May 2005 to February 2006. Soft cuttings (20 cm long, 3-5 mm diameter) with a pair of leaves and 4 to 6 buds were removed from an intermediate portion of the shoot of the following bearing species: P. coccinea, P. quadrangularis, P. serrato digitata, P. Edulis f. flavicarpa hybrid EC-2-0, Australian purple passion fruit Supersweet 4 or 25 and P. Nitida hybrid P. coccinea × P. Setacea. The cuttings were soaked for 2 min in an IBA solution with concentrations of 0, 500, 1,000 and 1,500 mg/L and planted 3 to 5 cm deep in polystyrene trays (72 cells) filled with commercial substrate Plantmax HT®: and kept under intermittent misting.
Randomized blocks were used with 4 replications with 12 valid cuttings in a 7×4 factorial arrangement with 7 different species/genotypes and 4 levels of hormone.
The study analyzed the percentage of rooting, the fresh and dry weight of the roots and tops, and the number of shoots and leaves.
IBA at 500 mg/L was found to be the most effective for rooting and vegetative growth of all the species, as well as the hybrid of sour passion fruit and the Australian purple passion fruit.
Authors
M. Carvalho Pires, J.R. Peixoto, O.K. Yamanishi
Keywords
Passiflora spp., indole-3-butyric, propagation, cutting
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