PJB-1995-49
EFFECT OF GA3 AND 2,4-D SPRAY APPLICATION ON THE MOKYHOLOGY AND ANATOMY OF DATE PALM ROOT SYSTEM
ABDULLAH R. DOAIGEY AND M.H. AL-WHAIBI
Abstract
GA3 and 2,4-D @ 10-5 and 10-3M used as foliar spray on date palm (Phoenix dactylifera L) cv. Khedri 3 seedlings affected the length of root and the anatomical characteristics of thick root. GA3 at low concentration increased the differentiation of fibre, xylem strands and number of vessels in each xylem strand while at high concentration the number, size of lacunae and the number of vessels in each xylem strand decreased. 2,4-D at low concentration increased lacunae, fibre and xylem strands but decreased the number of vessels in each xylem strand, which at high concentration decreased the number of fibre, xylem strands and number of lacunae but increased the xylem vessels in each xylem strand.
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