Rooting Response of Semi-hardwood Cuttings of Guava (Psidium guajava L.) to Various Concentrations of Different Auxins

Abstract

The study was conducted to investigate the influence of Indole Acetic Acid (IAA), Indole Butyric Acid (IBA) and Naphthalene Acetic Acid (NAA) each at 0, 1000, 2000, 3000, 4000, 5000 or 6000 ppm on the semi-hardwood cuttings of guava (Psidium guajava L.) Cv. Sufida taken in April, 1996. The cuttings were dipped in these solutions for 5 minutes. After treatment, the cuttings were planted and covered with transparent plastic sheet to arrest the water vapours for maintaining humidity. The experiment was laid out in the lathe house of Horticulture Section, Agricultural Research Institute, Tarnab, Peshawar. The auxins had no effect on the number of days to bud sprout whereas, sprouting in itself was significantly increased by IBA at 1000 and 3000 ppm and NAA at 2000 ppm with 79.84, 75.96 and 76.59% respectively. The highest survival (12.50%) was noted in the cuttings treated with IAA at 3000 and 6000 ppm, IBA and NAA both at 6000 ppm. IAA at 3000 ppm significantly increased the number of leaves (16) per cutting. The highest number of roots (23.75) per cutting was recorded in the cuttings treated with IBA at 4000 ppm. The significantly maximum root length (4.13 cm) was noted in the cuttings treated with IAA 3000 ppm. Cuttings treated with IAA at 5000 ppm and IBA at 4000 ppm exhibited significantly highest root weights of 16.25 and 16.62 g respectively.

Effect of IBA and Rooting Media on Hardwood Cuttings of Pomegranate (Punica granatum L.) CV. Bhagwa

“…The maximum fresh weight of roots was recorded in cuttings grown in a mixture of Coco peat : Vermiculite : Perlite could be related to the better aeration and drainage conditions and water maintenance capability and in 2000 ppm IBA increase the number of roots and production of more number of roots. These findings are in accordance with the findings of Wahab et al [12] in guava, Khayyat et al [13] in pothos; Moreno et al [14] in cape gooseberry and Rajkumar et al [6] in pomegranate.…”

Effect of Biofertilizers and Vermicompost on Pomegranate (Punica granatum L.) Cutting

“…Whereas, late sprouting of cuttings (12.00 days) were recorded under control. The result is in accordance with Wahab et al, 1999…”

Effect of Rooting Media and IBA Treatments on Shoot Production and Survival of Terminal Cuttings in Guava (Psidium guajava L.) cv. Taiwan Pink

“…Maximum number of leaves was produced in cuttings treated with IBA 3000 ppm which might be due to activation of shoot growth leading to an increased number of nodes that leads to development of more number of leaves. The increase in number of leaves per cutting might be due to the reason that the plant might diverted maximum assimilate quantities to the leaf buds, since the leaves are one of the production sites of natural auxins in them besides being very important for vital processes like photosynthesis and respiration (Wahab et al, 2001). IBA at 4000 ppm produced healthier, lengthy roots which might have helped in the absorption of water and nutrients.…”