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- Title
Protective role of astaxanthin against u.v.-B irradiation in the green alga Haematococcus pluvialis.
- Authors
Kobayashi, Makio; Okada, Takashi
- Abstract
Cyst cells of the green alga Haematococcus pluvialis accumulate astaxanthin with maturation of the resting stage. To study the protective role of astaxanthin against u.v. damage, both immature (astaxanthin-poor) and mature (astaxanthin-rich) cyst cells were exposed to u.v.-A or u.v.-B irradiation, and the residual cell viability and astaxanthin levels were determined. u.v.-B decreased both cell viability and astaxanthin level of cyst cells to a greater extent than u.v.-A. Tolerance of mature cyst cells to u.v.-B was 6-fold higher than that of immature cyst cells. These results indicated that astaxanthin in cyst cells functions as a protective agent against u.v.-B irradiation.
- Subjects
GREEN algae; IRRADIATION; PLUVIALIS; MICROBIAL cysts; ANIMAL life cycles; CELL physiology
- Publication
Biotechnology Letters, 2000, Vol 22, Issue 3, p177
- ISSN
0141-5492
- Publication type
Article
- DOI
10.1023/A:1005649609839