Root Initiation in Aerial Offshoots of Date Palm (Phoenix dactylifera) by Exogenous Application of Auxins
DOI:
https://doi.org/10.38211/joarps.2021.2.2.21Keywords:
Phoenix dactylifera, root initation, offshoot, growth regulators, auxins, Indole acetic acid, Napthelene acetic acidAbstract
Date palm (Phoenix dactylifera) is commercially propagated through offshoots. Along with this rooted offshoot the tree also produces aerial offshoots, which are rootless and die after plantation. In this study attempts have been made to evaluate the effect of auxins on the root initiation of the aerial offshoots of date palm cv. Hillawi. Therefore, an experiment was conducted to evaluate the effect of IAA (500 ppm), NAA (500 ppm), alone and in combination on root initiation in aerial offshoots of date palm cv. Hillawi. The auxins were applied to the aerial shoots by injection method. The experiment was laid out according to Randomized Complete Block Design (RCBD) with four treatments (Control, 500pmm IAA, 500ppm NAA and 500ppm IAA+NAA) and each treatment was replicated thrice. Injection method was used to apply the hormones and after the application of auxins the base of each offshoot was wrapped carefully with gunny bags having pinewood shaving as rooting media. After 40 days of supplication, offshoots were detached, and parameters were collected. Data indicated that NAA @ 500ppm gave highest rooting percentage (24.5%), total number of roots per offshoot (82.33) and total weight of roots per offshoots (607.4g) as compared to other treatments. Similarly, a greater number of smaller roots (dia<0.5cm) was also achieved in offshoots treated with 500ppm NAA. Hence, it may be concluded that root initiation was remarkable in NAA alone and in combination with IAA at 500ppm concentration in comparison to other treatments.
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Copyright (c) 2021 Saeed Ahmad, Muhammad Tayyab, Malik Mohsin Abbas, Muhammad Ikhlaq Khan, Komal Aslam, Maryam Nasir, Hira Faiz
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