Effects of solar UV radiation and temperature on morphology and photosynthetic performance of Chaetoceros curvisetus

Title:

Effects of solar UV radiation and temperature on morphology and photosynthetic performance of Chaetoceros curvisetus

Creator:

Guan, W., Peng, X., and Lu, S.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d3609700-b1bb-4bdb-a4bc-5fab0289d04d
uuid:d3609700-b1bb-4bdb-a4bc-5fab0289d04d
issn:0300-3604
doi:10.1007/s11099-015-0170-x

Subject:

photosynthesis, photochemical efficiency, phytoplankton, solar ultraviolet radiation, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

This study investigated the effect of solar ultraviolet radiation (UVR) and temperature on a chain length and photosynthetic performance of diatom Chaetorceros curvisetus. The cells were cultured in large quartz tubes and exposed to PAR, PAR + UV-A (PA), or PAR + UV-A + UV-B (PAB) radiation at 20°C and 28°C for six days, respectively. After recovery for 1 h, the cells were exposed again to three different radiations for 1 h. Then, a change in the photochemical efficiency (FPSII) was examined and UVR-induced photoinhibition was calculated. The percentage of long chains (more than five single cells per chain) in C. curvisetus significantly increased from 8.2% (PAR) to 38.9% (PAB) at 20°C; while it was not notably affected at 28°C. Mycosporine-like amino acids (MAAs) concentration obviously increased by irradiance increment from PAR to PAB at 20°C. Chlorophyll (Chl) a concentration significantly declined with increasing irradiance at 20°C. Both MAAs and Chl a concentrations were not obviously changed by irradiance at 28°C. Before and after reexposure, FPSII was significantly reduced both at 20°C and 28°C. UVR-induced photoinhibition at 20°C (39%) was higher than that at 28°C (30.9%). Solar UV radiation, especially UV-B, could significantly influence the percentage of long chains of C. curvisetus, especially at low temperature. UVR-induced photoinhibition can be alleviated by higher temperatures., W. Guan, X. Peng, S. Lu., and Obsahuje seznam literatury

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

219-225

Source:

Photosynthetica | 2016 Volume:54 | Number:2

Harvested from:

CDK

Metadata only:

false