Showing papers on "Arabitol published in 1971"

Control of arabitol formation in Schizophyllum commune development.

Abstract: Dikaryotic cells of S. commune synthesized polyols throughout the life cycle when grown on glucose, cellobiose, or cellulose. Basidiospores contained arabitol and mannitol which were depleted during germination. The mannitol content of the young germlings rose to normal levels within a day; arabitol accumulation remained depressed for 5 to 7 days and then returned to normal levels characteristic of vegetative cells. Individual homokaryons differed in their production of intracellular polyols, which, unlike germlings, remained constant with cultural age. Homokaryon (str. 699) produced low levels of arabitol but high levels of glycerol while another homokaryon (str. 845) was the reverse. Mixtures of these homokaryons as well as the dikaryon (699×845) produced arabitol and glycerol levels intermediate between the parent homokaryons. High concentrations of glucose did not change the nature of the polyols produced. Arabitol formation could be induced prematurely in germlings or elevated in the dikaryon by growth on acetate or ethanol. Both homokaryons responded to growth on acetate with elevated arabitol production; acetate induction of arabitol formation was repressed in all types of cells if glucose were added simultaneously with acetate. Maltose, cellobiose, and trehalose also stimulated arabitol formation in young germlings, suggesting that glucose repression was the cause of decreased arabitol formation in basidiospore germlings. There was no correlation between the formation of arabitol and the derepression of isocitrate lyase or change in specific activities of alkaline and acid phosphatase in germlings grown on various carbon sources.

Chemical and physiological changes in filamentous fungi during autolysis. X. Changes in the concentration of polyol in autolysing cultures of several fungi

Abstract: Botrytis cinerea, Colletotrichum gloeosporioides, Aspergillus niger andPenicillium griseofulvum were grown in flasks as stationary cultures in the ordinary Czapek-Dox medium at 24° C in the dark for long periods of time At convenient intervals during autolysis samples of mycelium were harvested and its polyol content determined The loss of mycelial mannitol during autolysis reached to a little more than 60 %, more than 70 %, to nearly 80 % and 90 % forC gloeosporioides, P griseofulvum, A niger andB cinerea, respectively Seventy per cent of the arabitol contained inP griseofulvum and 85 % of the arabitol inC gloeosporioides disappeared during autolysis Mannitol remained present in appreciable amounts in these four fungi throughout the whole period of autolysis described, whereas arabitol disappeared fromB cinerea and fromA niger during the process