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American Journal of Plant Physiology

Year: 2013 | Volume: 8 | Issue: 2 | Page No.: 74-83
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Authors

H. Mehri

K. Mhanna

A. Soltane

Keywords

Research Article

Root Growth of Arbequina Cuttings as Influenced by Organic and Inorganic Substrates under the Conditions of Al-Jouf (KSA)

H. Mehri, K. Mhanna and A. Soltane
‘Arbequina’ olive cultivar which is the most grown for high quality olive oil in Spain, has the potential for being cultured in KSA. The aim of this study was to investigate the efficiency of inorganic and organic growing substrates on the root growth and the root morphology of Arbequina olive cuttings. One-year-old cuttings were dipped in IBA 4000 ppm before planting in 3 substrates: sand, perlite (inorganic) and peat moss (organic). The results showed that IBA (1H-indole-3-butyric acid) at 4000 ppm combined with perlite substrate were successful in promoting earlier root development and limited callus formation in the early period of rooting. Cuttings rooted more profusely on perlite substrate and developed significantly more and longer roots per cutting. Also best survival and easily acclimatization of plants in greenhouse was unregistered. On the contrary, peat moss developed a root system with high callus and proved to be less qualitative with less number and shorter roots per cutting, suggesting that peat moss was not a suitable environment for adventitious root formation of Arbequina cultivar. Good callus formation was also obtained with untreated control cuttings where late emergence was observed. Roots of cuttings necrosed and died by the end of growing period. Considering all studied aspects of root system, the physical properties of substrates should be carefully choose as rooting medium of olive cuttings.
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