UTILIZATION OF DISSOLVED ORGANIC-CARBON BY NATURAL-POPULATIONS OF EPIBENTHIC SALT-MARSH DIATOMS

被引：12

作者：

DARLEY, WM

OHLMAN, CT

WIMPEE, BB

机构：

[1] Department of Botany, University of Georgia, Athens, Georgia

来源：

JOURNAL OF PHYCOLOGY | 1979年 / 15卷 / 01期

关键词：

acetate; carbon budget; diatoms; glucose; heterotrophy; lactate; salt marsh;

D O I：

10.1111/j.0022-3646.1979.00001.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Natural populations of pennate diatoms collected from the mudflats of a Georgia salt marsh were cleansed by differential centrifugation and tested for their ability to assimilate and respire 14C‐acetate, lactate and glucose at 1 μM concentrations. A correction was made for contaminating bacterial activity. Utilization rates were measured in the light and dark and in the presence of a second substrate. Mean incorporation rates were (in pmol ·μg chl a−1· h−1± SE): acetate, 117 ± 37; lactate, 53.7 ± 20.4; glucose 13.0 ± 5.8. Using a carbon/chlorophyll ratio of 53.2 and a generation time of 48 h we calculate these algae could obtain up to 1% of their carbon heterotrophically if several usable substrates were each available at 1 μM concentrations. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：1 / 5

页数：5

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[1] HETEROTROPHIC UTILIZATION OF DISSOLVED ORGANIC COMPOUNDS IN SEA .3. MEASUREMENT OF OXIDATION RATES AND CONCENTRATIONS OF GLUCOSE AND AMINO ACIDS IN SEA WATER [J].