PJB-1986-1
NATURAL GROWTH SUBSTANCES AND WOOD DIFFERENTIATION IN BLUE PINE (PINUS WALLICHIANA, A.B. JACKS.).
T.M. Khattak and A.
Mahmood
Abstract
Twenty-five trees selected in a large Blue pine stand in Burban Forest in Murree Forest
Division were studied for xylem cell formation
and seasonal variation in the amount of natural growth subs¬tances. Auxin extracted
during different periods of the season
showed significant correlation with the radial diameter of tracheid, but no significant correlation was found between the rate and duration of the radial enlargement of differentiating tracheid and the auxin level. There was no significant correla¬tion in seasonal changes in natural auxin and cell wall thickness of tracheid. Significant correlation was found between cell wall thickness of tracheid and the duration of phase of maturation. Water soluble inhibitors showed significant correlation with the duration of phase of maturation.
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