Growth, N2 fixation and photosynthesis in a cyanobacterium, Trichodesmium sp., under Fe stress

被引：24

作者：

Fu, FX ^{[1
]}

Bell, PRF ^{[1
]}

机构：

[1] Univ Queensland, Dept Chem Engn, Brisbane, Qld 4072, Australia

来源：

BIOTECHNOLOGY LETTERS | 2003年 / 25卷 / 08期

关键词：

Fe limitation; growth rate; N-2; fixation; photosynthesis; Trichodesmium;

D O I：

10.1023/A:1023068232375

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Trichodesmium sp., isolated from the Great Barrier Reef lagoon, was cultured in artificial seawater media containing a range of Fe concentration. Fe additions stimulated growth, N-2 fixation, cellular chlorophyll a content, light-saturated chlorophyll a-specific gross photosynthetic capacity (P-m(chl a)) and the dark respiration rate (R-d(chl a)). Cell yields only doubled for 9 nM Fe relative to zero added Fe, whereas N-2 fixation increased 11-fold considerably for 450 nM Fe. The results suggest that N-2 fixation of Trichodesmium is more sensitive to Fe limitation than are the cell yields.

引用

页码：645 / 649

页数：5

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