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THE EFFECT OF APPLIED GROWTH HORMONES ON CELL PROLIFERATION
IN THE CAMBIAL ZONE OF
THUJA ORIENTALIS
L.
Khalida Khatoon and
A.
Mahmood
Abstract: The
effect of IAA, GA and Kinetin on cell division in the cambial zone of
Thuja orientalis L.
was studied. IAA was more effective than either GA or
Kinetin when used alone. Interaction of growth substances in the
combinations used have shown a greater tendency towards cell divisions
for the first 15 days of the experimental period. Between 15-30 days
period, number of cells decreased in all experiments except where IAA
and GA were used together in culture. Maximum number of cells were
produced when IAA, GA and Kinetin were used together. Cell division in the cambial zone responded more to growth hormones used
in tissue cultures than applied in lanolin. This has been related to
better physical conditions prevailing in cultures.
Department of Botany, University of Karachi, Karachi-32, Pakistan
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