Accession Number : AD0703459

Title :   SOME SALINITY-INDUCED CHANGES IN GROWTH, PIGMENTS, AND CYCLOHEXANETETROL CONTENT OF MONOCHRYSIS lutheri,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA HALIFAX (NOVA SCOTIA) ATLANTIC REGIONAL LAB

Personal Author(s) : Craigie,J. S.

Report Date : 11 JUL 1969

Pagination or Media Count : 9

Abstract : Growth rates of Monochrysis lutheri Droop increased with light intensity in seawater medium (SWM), whereas cells grown at either low NaCl (0.013 M) or high NaCl (1.02 M) showed reduced growth at higher light intensities with an optimal intensity near 0.05 g cal/sq cm per min. Chlorophyll and total carotenoids usually declined with increasing light intensity except in cells maintained on a high salt regime, when the carotenoid content remained high at all light intensities. The concentration of intracellular cyclohexanetetrol in SWM cells was approximately 0.3 M and was dependent upon the osmotic properties of the medium. Added NaCl, mannitol, sucrose, but not glycerol, caused accumulation of the cyclitol, whereas dilution of the medium caused its expulsion from the cells. Addition of 0.5 moles/liter of NaCl to SWM cells caused an 80-90% increase in cyclitol concentration within 4 hr; dilution of the medium reduced the cyclitol to the new steady state level within 10 min. (Author)

Descriptors :   (*ALGAE, GROWTH(PHYSIOLOGY)), (*SALINITY, ALGAE), ORGANIC PIGMENTS, CHLOROPHYLLS, LIGHT, CYCLOHEXANOLS, SEA WATER, ECOLOGY, OSMOTIC PRESSURE, CANADA

Subject Categories : Biological Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE