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REPRODUCTION INDUCED BY HIGH HYDROSTATIC PRESSURE IN CLADOPHORA
GLOMERATA
(L.) KUETZ FROM BALTIC SEA.
Mustafa
Shameel*
Abstract: The
after effects of hydrostatic pressure on the cellular morphology of
Cladophora glomerata
were studied. Two experimental series, one of 5 hours’ and
the other of 20 hours’ pressure duration
were
conducted at 15°C; the
pressure levels being: 400, 500, 800 & 1000 atm. Abnormalities in the
morphology of algal cells increased with the rise of pressure. The
pressure treated algae exhibited a vigorous reproduction, producing
abnormally the bi-and quadriflagellated zoospores
with
limited power of escaping
through subterminal pores.
The
retained zoospores metamorphosed themselves to spherical cysts. Tnere
was an initial increase in the intensity of rep -oduction with the
increase of hydrostatic pressure as well as the time of pressure action.
When both these factors reached the upper physiological limit of
tolerance for the
alga,
the
reproduction intensity decreased sharply.
Institut fur Meereskunde, botanische Abteilung, Kiel
(F.R.
Germany)
Present address: Institute of Marine Biology, University of Karachi,
KARACHI-32 (Pakistan).
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