Study the changes of some metal elements and vitamins in Zahdi cv. date palm (Phoenix dactylifera) leaves during various stages of fruits growth and development

دراسة تغيرات بعض العناصر المعدنية والفيتامينات في أوراق نخيل التمر ( Phoenix dactylifera ) صنف زهدي أثناء المراحل المختلفة لنمو وتطور الثمار

Abstract

To determined the changes in some metal minerals and vitamins in Zahdi cv. date palm leaves during various stages of fruits growth and development (Hababouk, Kimri, Khalal, Rutab and Tamar), the present study was conducted during the growing season on Zahdi cv. date palm at 12 years age. The results revealed that macro and microelements content of leaves were differ significantly depending on various times of fruits growth and development, the most of macro and microelements were increased to its high levels at the early stages of fruits growth (Hababouk, Kimri and Khalal ) depending on type of the element except Phosphor which indicated high levels at the Kimri stage, while the late stages of fruits maturation (Rutab and Tamar) revealed a decreased in the leaves content of macro and micro nutrients except Phosphor and Zink which decreased to its minimum level in the leaves at the Kimri stage. The results also showed that the levels of the vitamins α-tokoferol, γ-tokoferol, K1, B1, B2, B6 and Niacin were increased in the leaves to its high levels at the Khalal stage, whereas vitamins Inositol, Pantothenic acid and Biotin increased in leaves to the high quantity at the Rutab stage. On the other hand the leaves content of vitamins α-tokoferol, γ-tokoferol, K1, B2, B6, Inositol, Niacin, Pantothenic acid and Biotin trend to the lowest values at the Tamar stage, while the low level of vitamin B1 in leaves was decreased to the low value at the Rutab stage.