Muhammad Irfan Ashraf, Shoukat Sajad, Rashid Iqbal
A study was carried out during the year 2013-2014 at vegetable experimental area, Institute of Horticultural Sciences, University of Agriculture, Faisalabad to investigate the effect of plant growth regulators on certain morphological and biochemical parameters of Raphanus sativus. The plant growth regulators IBA and 2,4-D were applied individually in different concentrations; IBA (2 ppm and 4 ppm) and 2,4-D (2 ppm and 4 ppm). Experimental design was randomized complete block design with 3 replications. The results indicated that foliar application of Indole-3-butyric acid and 2,4-Dichlorophenoxyacetic acid with different concentrations led to significant increases in vegetative growth; leaf length, plant height, number of leaves per plant, fresh and dry weight of roots, root diameter and biochemical attributes like total soluble solids, titratable acidity and vitamin C contents of radish. Maximum root length was observed in 2,4-D application with both concentrations (2 ppm, 4 ppm). Root width was maximum in 2,4-D with 4 ppm concentration. TSS was maximum in control and 2 ppm of 2,4-D and these two are at par with each other. Maximum acidity was observed by the application of IBA @ 2 and 4 ppm concentrations. However less acidity was observed in control as compared to others. The recorded data was statistically analyzed using Statistics software at 5% probability level under RCBD. Least Significant Difference (LSD) test was applied for comparing the differences among treatment means.
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