Sources of inorganic carbon for photosynthesis by three species of marine diatom

被引：80

作者：

Korb, RE ^{[1
]}

Saville, PJ ^{[1
]}

Johnston, AM ^{[1
]}

Raven, JA ^{[1
]}

机构：

[1] UNIV DUNDEE,DEPT BIOL SCI,DUNDEE DD1 4HN,SCOTLAND

来源：

JOURNAL OF PHYCOLOGY | 1997年 / 33卷 / 03期

关键词：

Chaetoceros calcitrans; Ditylum brightwellii; inorganic carbon assimilation; isotopic disequilibrium; Skeletonema costatum; stable carbon isotopes;

D O I：

10.1111/j.0022-3646.1997.00433.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The utilization of inorganic carbon by three species of marine diatom, Skeletonema costatum (Grev.) Cleve. Ditylum brightwellii (West) Grun., and Chaetoceros calcitrans Paulsen was investigated using an inorganic carbon isotopic disequilibrium technique and inorganic carbon dose-response curves. Stable carbon isotope data of the diatoms are also presented. Observed rates of photosynthetic oxygen evolution were greater than could be accounted for by the theoretical rate of CO2 supply from the uncatalyzed dehydration of HCO3- in the external medium, suggesting use of HCO3- as an inorganic carbon source. Data from the isotopic disequilibrium experiment demonstrate the use of both HCO3- and CO2 for photosynthesis. Carbon isotope discrimination values support the use of HCO3- by the diatoms.

引用

页码：433 / 440

页数：8

共 42 条

[1] MEASUREMENT OF CO2 AND HCO3- FLUXES IN CYANOBACTERIA AND MICROALGAE DURING STEADY-STATE PHOTOSYNTHESIS [J].