In vitro acclimatization of date palm (Phoenix dactylifera L.) plantlets: A quantitative comparison of epicuticular leaf wax as a function of polyethylene glycol treatment |
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Authors: | Abdelouahhab Zaid Harrison Hughes |
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Institution: | (1) Department of Biology, Faculty of Science Marrakech-Semlalila, BPS 15, Marrakech, Morocco;(2) Department of Horticulture, Colorado State University, 80523 Fort Collins, CA, USA |
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Abstract: | Wax deposits on leaf surfaces ofin vitro-grown plantlets,in vitro plantlets treated with polyethylene glycol and greenhouse-grown seedlings from five cultivars of date palm (Phoenix dactylifera L.) were extracted and quantified. Significant variations among treatments and cultivars were obtained. Greenhouse-grown plants had the greatest wax deposits followed by the acclimatized plantlets.In vitro plantlets had an average of 15% of the wax of greenhouse plants. Cultivar and plant age differences had a significant effect on the quantity of wax deposits. Greenhouse seedlings of Majhool , Deglet Noor and Khadraoui (cultivars grown under irrigation) had less wax accumulation than Zahidi and Sayer , dryland cultivars.The increase in wax deposition as a result of polyethylene glycol treatment, explains in part, the decreased water loss observed in acclimatized plantlets when transferredex vitro.
Abbreviations EW
epicuticular wax
- NAA
naphthalene acetic acid
- PEG
polyethylene glycol |
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Keywords: | |
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