YEASTS FROM HAWAIIAN FRUIT FLIES: THEIR IDENTIFICATION AND ABILITY TO PRODUCE RIBOFLAVIN

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Abstract
17 isolates of yeasts representing 3 genera and 6 spp. were collected from the following flies or immediate surroundings: Hansenula anomala (1 isolate) from feces of Drosophila pilimana near Tautalus, Oahu; Candida intermedia (8 isolates) from native substrate of larvae of D. pilimana and small brown Drosophila. near Manoa Falls, Oahu; C. krusei (4 isolates) from feces of D. crucigera. D. pilimana and small brown Drosophila in Oahu; C. monosa (2 isolates) from crops of flies similar to D. pilimana. near Tautalus, Oahu; Candida sp. (1 isolate) from feces of D. crucigera near Poa Moho, Oahu. Rhodotorula sp. from D. pilimana near Tautalus, Oahu. Candida sp. is similar to C. krusei. as it ferments glucose only and assimilates glucose and can grow in absence of supplied vitamins; it differs from C. krusei by an ability to assimilate L-sorbose. Rhodotorula sp. is similar to R. sanniei but differs from the latter by its inability to assimilate maltose, cellobiose, melezitose, rhamnose, and salicin and its ability to assimilate calcium 2-ketogluconate. The ability of each isolate to produce and retain riboflavin in the cells was detd.
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