Premium
UPTAKE OF ORGANIC, COMPOUNDS BY TWO FACULTATIVELY HETEROTROPHIC MARINE CENTRIC DIATOMS 1, 2
Author(s) -
White Alan W.
Publication year - 1974
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1974.tb02736.x
Subject(s) - biology , galactose , heterotroph , clone (java method) , sugar , algae , biochemistry , glucose uptake , diatom , botany , bacteria , dna , endocrinology , genetics , insulin
SUMMARY Glucose and galactose uptake ability in Cyclotella cryptica (clone WT‐1‐8) and glucose uptake ability in Coscinodiscus sp. develop rapidly in the dark. Induction of sugar uptake ability in the dark does not require the presence of sugar in the medium. The sugars are taken up by carrier‐mediated systems. In C. cryptica glucose and galactose are probably taken up by the same system. The capacity of glucose uptake in this recently isolated clone of C. cryptica is nearly 5 times that of a previously studied clone (0‐3A). Other organic compounds, which by themselves do not support heterotrophic growth, can be taken up and respired by both diatoms at considerable rates compared, to glucose and galactose. Therefore, in nature, these diatoms may be able to utilize a variety of dissolved organic compounds as sources of intermediary metabolites and as respiratory substrates.