Promotive effects of 5-aminolevulinic acid on growth of young 'Barhee' tissue culture- derived date palm (Phoenix dactylifera L.) trees in a newly established orchard (original) (raw)

2011

Abstract

Date palms growing in hot arid regions are generally facing several kinds of environmental stresses, especially salinity and aridity, which limit growth of young trees in newly established orchards and thus might negatively affect future tree productivity and fruit quality. Growth parameters, pigment contents and nutrient uptake were examined in young tissue culture-derived date palm trees (Phoenix dactylifera L.) cv. 'Barhee' subjected to foliar application of 5-aminolevulinic acid (5-ALA) at different rates in a newly established orchard. The results showed that after 20 months from transplanting all the trees were successfully developed and well established without any losses. After 12 months from transplanting, the tree height was not significantly affected by 5-ALA application compared to control. However, after 20 months from transplanting, the tree height was significantly higher at 50 and 100 ppm of 5-ALA application compared to control, while 5-ALA application at 15...

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