EFFECTS OF ARSENATE ON GROWTH OF NITROGEN-AND PHOSPHORUS-LIMITED CHLORELLA-VULGARIS (CHLOROPHYCEAE) ISOLATES

被引：8

作者：

CREED, IF

HAVAS, M

TRICK, CG

机构：

[1] UNIV WESTERN ONTARIO,DEPT PLANT SCI,LONDON N6A 5B7,ONTARIO,CANADA

[2] UNIV TORONTO,DEPT BOT,TORONTO M5S 1A1,ONTARIO,CANADA

[3] UNIV TORONTO,FAC FORESTRY,TORONTO M5S 1A1,ONTARIO,CANADA

[4] UNIV TORONTO,INST ENVIRONM STUDIES,TORONTO M5S 1A1,ONTARIO,CANADA

来源：

JOURNAL OF PHYCOLOGY | 1990年 / 26卷 / 04期

关键词：

ARSENATE; ARSENIC; CELL YIELD; CHLORELLA-VULGARIS; GROWTH RATE; LAG PHASE; NUTRIENTS; PHOTOSYNTHESIS;

D O I：

10.1111/j.0022-3646.1990.00641.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The effects of arsenate on the growth characteristics of five isolates of the freshwater alga, Chlorella vulgaris Beij., were examined. Two field isolates originated from arsenic-contaminated sites in Yukon, Canada and Kyushi, Japan; two reference isolates were obtained from the University of Texas Culture Collection. One isolate was selected for arsenic-tolerance in the laboratory. All five strains survived in culture solutions containing high arsenate concentrations. Arsenate (1-25 mM As) reduced photosynthesis and cell growth, as reflected by induced lag periods, slower growth rates, and lower stationary cell yields. Field isolates had shorter lag periods, higher growth rates, and enhanced cell yields compared to lab isolates when exposed to the same arsenic concentrations. Growth of the phosphorus-limited field strains was stimulated by the addition of arsenic. The cell yield of phosphorus-limited C. vulgaris Yukon, when treated with arsenic, was two times that of the phosphorus-limited control. This pattern was not evident when photosynthesis was used as a measure of cell response.

引用

页码：641 / 650

页数：10

共 52 条

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