Analysis of photosynthetic responses and adaptation to nitrogen starvation in Chlorella using in vivo chlorophyll fluorescence

Title:

Analysis of photosynthetic responses and adaptation to nitrogen starvation in Chlorella using in vivo chlorophyll fluorescence

Creator:

Sayed, O. H.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:2b891b17-537f-4eeb-b042-4e50a2f0e8c3
uuid:2b891b17-537f-4eeb-b042-4e50a2f0e8c3
issn:0300-3604
doi:10.1023/A:1006995410998

Subject:

carotenoids, oxygen evolution, photosystem 2, species differences, and respiration

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Nitrogen (N) starvation resulted in degreening, inhibition of photosynthetic oxygen evolution and dark respiration, reduced survival, and increased age-specific mortality in both Chlorella fusca and Chlorella vulgaris. Analysis of in vivo chlorophyll (Chl) fluorescence induction kinetics revealed the presence of N-starvation-induced changes at the level of degreened thylakoids in both species. These changes included decreased yield of the photochemistry of photosystem 2 (PS2), and a declined photosynthetic efficiency. Synthesis of secondary carotenoids represented a biochemical change in carotenogenesis that had a photoprotective effect in degreened C. fusca. This inferred photoprotection was reflected in the delayed inhibition of oxygen evolution and improved survival of C. fusca under N-starvation. The effect was further elucidated by comparison with C. vulgaris which was not able to synthesize secondary carotenoids under the same conditions.

Language:

Multiple languages

Rights:

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

Coverage:

611-619

Source:

Photosynthetica | 1998 Volume:35 | Number:4

Harvested from:

CDK

Metadata only:

false