ChlorophylI fluorescence quenching caused by inorganic carbon depletion in the green alga Scenedesmus quadricauda

Title:

ChlorophylI fluorescence quenching caused by inorganic carbon depletion in the green alga Scenedesmus quadricauda

Creator:

Knoppová, J., Masojídek, J., and Pokorný, J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:3b66e261-c153-40ca-8e7e-5473fd55ca61
uuid:3b66e261-c153-40ca-8e7e-5473fd55ca61
urnnbn:urn:nbn:cz:aba007-000ffe

Type:

model:internalpart and TEXT

Format:

print

Description:

The effect of inorganic (IC) depletion on fluorescence quenching was studied under laboratory conditions using the chlorococcal alga Scenedesmus quadricauda strain Greifswald/15. The absence of IC caused a decrease in photochemical quenching (^p), fluorescence yield and the photosystem 2 photochemical yield (dF/F^), and an increase of non-photochemical quenching {q^). High extemal pH (about 11), which accompanies the IC-depletion, did not háve any remarkable effect on the algae. Fluorescence parameters were reversed by a resupply of CO2. The IC-defícient algae when exposed to high irradiance appeared to be less sensitive to the photoinhibition than the algae supplied with CO2. Increased thermal dissipation of the excitation energy (non-photochemical quenching) in the absence of IC is one of the probable protective mechanisms against photoinhibitory damage.

Language:

Multiple languages

Rights:

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

Coverage:

541-547 and 63-69

Source:

Photosynthetica | 1993 Volume:28 | Number:4

Harvested from:

CDK

Metadata only:

false