INHIBITION OF NITRATE UPTAKE BY AMMONIUM AND UREA IN THE EUKARYOTIC PICOFLAGELLATE MICROMONAS-PUSILLA (BUTCHER) MANTON-ET-PARKE

被引：33

作者：

COCHLAN, WP

HARRISON, PJ

机构：

[1] UNIV BRITISH COLUMBIA,DEPT OCEANOG,VANCOUVER V6T 1W5,BC,CANADA

[2] UNIV BRITISH COLUMBIA,DEPT BOT,VANCOUVER V6T 1W5,BC,CANADA

来源：

JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY | 1991年 / 153卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

AMMONIUM; INHIBITION; MICROMONAS-PUSILLA; NITRATE; N-UPTAKE; PICOPLANKTON; UREA;

D O I：

10.1016/0022-0981(91)90221-H

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Experiments were carried out with nitrate-replete cultures of the picoflagellate Micromonas pusilla (Butcher) Manton et Parke to investigate the effects of ammonium and urea additions on nitrate uptake. By employing both N-15 methodology and by measuring the ambient nutrient concentrations over time, the uptake rates of the three substrata could be determined. Nitrate uptake was completely inhibited by NH4+ concentrations of 1-10-mu-g-at N . l-1, whereas a 10-mu-g-at N . l-1 perturbation of urea resulted in a 28% reduction of NO3- uptake and both N substrata were taken up simultaneously. This is the first study of the uptake interaction(s) of multiple N substrata for a picoplankter.

引用

页码：143 / 152

页数：10

共 47 条

[31] STEADY-STATE GROWTH OF THE MARINE DIATOM THALASSIOSIRA-PSEUDONANA - UNCOUPLED KINETICS OF NITRATE UPTAKE AND NITRITE PRODUCTION [J].