Biologia plantarum 48:105-108, 2004 | DOI: 10.1023/B:BIOP.0000024283.74919.4c

Growth, Water Content, and Proline Accumulation in Drought-Stressed Callus of Date Palm

J.M. Al-Khayri1, A.M. Al-Bahrany2
1 College of Agriculture and Food Sciences, Date Palm Research Center, Al-Hassa, Saudi Arabia
2 Department of Horticulture, College of Agriculture and Food Sciences, Al-Hassa, Saudi Arabia

This study was conducted to examine the response of date palm (Phoenix dactylifera L., cvs. Barhee and Hillali) calli to water stress. Callus derived from shoot tip explants was inoculated in liquid Murashige and Skoog medium containing 10 mg dm-3α-naphthaleneacetic acid, 1.5 mg dm-3 2-isopentenyladenine, and 0 to 30 % (m/v) polyethylene glycol (PEG 8000) to examine the effect of water stress. After 2 weeks, callus growth, water content, and proline accumulation were assessed. Increasing water stress caused a progressive reduction in growth as expressed in callus fresh mass, relative growth rate, and index of tolerance. Both genotypes tested followed this general trend, however, cv. Barhee was more tolerant to drought stress than cv. Hillali. Increasing PEG concentration was also associated with a progressive reduction in water content and increased content of endogenous free proline.

Keywords: index of tolerance; osmotic adjustment; relative growth rate; tissue culture; water stress
Subjects: amino acids; cultivar and genotype differences, drought, heat shock protein; date palm, proline accumulation; growth analysis, plant development, biomass and yield enhancement; in vitro culture, callus induction; in vitro culture, nutrient media modification; in vitro culture, regeneration, organogenesis; nutrient medium, Murashige and Skoog; osmotic adjustment; Phoenix dactylifera; polyethylene glycol; proline accumulation, callus culture; tolerance, index of; water content, proline accumulation

Published: March 1, 2004Show citation

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Al-Khayri, J.M., & Al-Bahrany, A.M. (2004). Growth, Water Content, and Proline Accumulation in Drought-Stressed Callus of Date Palm. Biologia plantarum, 48(1), 105-108. doi: 10.1023/B:BIOP.0000024283.74919.4c.
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