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Certain physico-chemical changes of seeded and parthenocarpic fruits date palm ( Phoenix dactylifera L.) cv . Hillawi | ||
| Basrah Journal For Date Palm Research | ||
| Article 10, Volume 9, Issue 2, 2010, Pages 110-131 PDF (0 K) | ||
| Authors | ||
| Muntaha A Ati; ayed F Abass | ||
| Abstract | ||
| Change in certain physilo-chemical were studied for seeded and parthenocarpic fruits of the date palm cv. Hillawi .The result indicated that seeded and parthenocarpic fruits of the date palm cv. Hillawi have single sigmoidal growth curve, which have three stages the log phase of growth which lasted for six weeks and eight weeks in seeded and parthenocarpic fruits. The fruits there entered the log phase of growth, during which the growth rate of the fruit occurred rapidly until 12th and 13th week after pollination for seeded and parthenocarpic fruits respectively . There after, the fruits enter a steady state of growth , douing which the seeded fruit continued growth till it reached their maximum fresh weight at the Khalal stage. As for, parthenocarpic fruits there was aslow increase in growth rate until the fruits reached the Khalal stage (24th week after pollination ) at which the fruits reached their maximum fresh weight .The results showed that fresh weight for parthenocarpic fruit were much lower than those of the seeded fruit. Water content for seeded and parthenocarpic fruits reached a maximum value at the 10th and 14th week after pollination respectively, there was a sharp drop in water content for seeded fruit as it entered the Tamer stage, whereas water content of the parthenocarpic fruit was high till the end of the growing season, whereas the reverse was true for changes in percentage dry matter .The total soluble solids reached a peak value of as the seeded fruits entered the Tamer stage. However in parthenocarpic fruits , total soluble solids was low and reached maximum value of 11.2 % at 15th week after pollination , and there was no increase in total soluble solids till the end of the growing season (18th week after pollination ). Sucrose accumulation reached a peak value at the end of Khalal stage in seeded fruits, followed by rapid inversion of sucrose reaching the lowest value at the Tamer stage, which coincided with rapid accumulation of reducing sugars and total sugars. For parthenocarpic fruits, there was no sucrose inversion, and there was a slow increase in reducing and total sugars, and the concentrations were lows than those of seeded fruits | ||
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