Author:
Bollman R. C.,Robinson G. G. C.
Abstract
The green alga, Ankistrodesmus braunii (Naeg.), was found to possess a biphasic transport system for D-glucose. The high affinity component of the system had a Vmax of 1.2 × 10−7 pmol∙cell−1∙min−1 and a specific transport constant (Kt) of 7.7 nM glucose. The low-affinity component had a Vmax of 10.8 × 10−4 pmol∙cell−1∙min−1 at a Kt of 16.2 μM glucose. These kinetic values indicate that the alga could compete successfully with bacteria for glucose in natural waters. Ankistrodesmus braunii also grew heterotrophically on 0.1 mM glucose with a doubling time of 31.4 h. The growth rate was shown to correspond with the transport rate when an excretion rate of 3.5% and a respiration rate of 48% of the transported glucose were considered.
Publisher
Canadian Science Publishing
Subject
Genetics,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Immunology,Microbiology
Cited by
8 articles.
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