Photosynthetic electron transport at low temperatures in the green algal foliose lichens Lasallia pustulata and Umbilicaria hirsuta affected by manipulated levels of ribitol

Title:

Photosynthetic electron transport at low temperatures in the green algal foliose lichens Lasallia pustulata and Umbilicaria hirsuta affected by manipulated levels of ribitol

Creator:

Hájek, J., Váczi, P., and Barták, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:bdc3c87a-9520-4fd7-9de0-05cc7a09477c
uuid:bdc3c87a-9520-4fd7-9de0-05cc7a09477c
issn:0300-3604
doi:10.1007/s11099-009-0033-4

Subject:

chlorophyll fluorescence imaging, freezing tolerance, photosystem II, and polyols

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In lichens, ribitol is known as a carbon storage compound, an osmotic agens involved effectively in cell compartments protection during dehydration of lichen thalli and as a cryoprotective compound. In our study, we investigated the effect of ribitol on photochemical processes of photosynthesis in foliose lichens [Lasallia pustulata (L.) Mérat., Umbilicaria hirsuta (Sw. ex Westr.) Hoffm.] at low temperature. The effects of three concentrations of ribitol, added externally to thalli segments on several chlorophyll (Chl) fluorescence parameters, were evaluated. The 72 h exposition to 8, 16, and 26 mM ribitol led to a concentration-dependent increase in FV/FM, decrease in non-photochemical quenching (NPQ) but no change in quantum yield of photosystem II photochemistry (ΦPSII) values at -5 °C). At higher temperature (0, +5 °C), no effect of ribitol addition on the photosynthetic parameters was apparent. and J. Hájek, P. Váczi, M. Barták.

Language:

Multiple languages

Rights:

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

Coverage:

199-205

Source:

Photosynthetica | 2009 Volume:47 | Number:2

Harvested from:

CDK

Metadata only:

false