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Effect of Mineral Acids on Rooting Response of Aging Mung Bean (Phaseolus aureus Roxb.) Cuttings via Indole Acetic Acid Level



Author(s)

Abdullah O. Alwan Al-Delaimy

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DOI:10.17265/2161-6256/2013.06A.004

Department of Crop Field, Collage of Agriculture, University of Al-Qasim Green, Babylon City, Hilla, Iraq

The influence of nitric acid (HNO₃) as a strong mineral acid on rooting response of fresh and aging mung bean cuttings has been studied on the level of Indole-3-Acetic Acid (IAA). The data revealed significant increase in rooting response of fresh cuttings treated with (0.0001% and 0.1%) concentrations of HNO₃ solution, significant increase in rooting response of aged cuttings (for 3 days in d/H₂O) with (0.0001% and 0.01%) concentration of HNO₃ solution and highly significant increase in rooting response of aged cuttings (for 3 days in HNO₃ solution) with (0.0001%) concentration, while highly concentration (0.5%) revealed highly significant decrease in rooting response compared to control (d/H₂O). Quantitative estimation of IAA by spectrophotometric method as indicators for oxidative processes that occurrence during aging phenomenon verified a highly significant increase of IAA content in hypocotyles of fresh and aged cuttings in optimal concentration of HNO₃.

Aging, IAA biosynthesis, rooting response, mineral acids, macronutrients, stem cuttings.