Chronic effects of ultraviolet-B radiation on growth and cell volume of Phaeodactylum tricornutum (Bacillariophyceae)

Journal Article · Tue Dec 01 00:00:00 EST 1992 · Journal of Phycology; (United States)

DOI:https://doi.org/10.1111/j.0022-3646.1992.00757.x· OSTI ID:6813207

Behrenfeld, M J ^[1]; Hardy, J T ^[2]; Lee, H II ^[3]

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1. AScI Corp., Newport, OR (United States)
2. Western Washington Univ., Bellingham (United States)
3. Environmental Protection Agency, Newport, OR (United States)

Cultures of the temperate estuarine diatom, Phaeodactylum tricornutum Bohlin (NEPCC Clone 31), were grown under ambient intensities of ultraviolet-A radiation (UVAR), photosynthetically active radiation (PAR), and various intensities of ultraviolet-B radiation (UVBR; 290-320 nm). Growth rates and cell volumes were monitored for 36 d. UVBR decreased growth rates and increased cell volumes. Sensitivity of growth to UVBR increased with time. Growth rates of P. tricornutum decreased with increasing ratios of UVBR:UVAR + PAR. 25 refs., 4 figs., 1 tab.

• OSTI ID: 6813207
• Journal Information: Journal of Phycology; (United States), Vol. 28:6; ISSN 0022-3646
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
DIATOMS
BIOLOGICAL RADIATION EFFECTS
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SENSITIVITY
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