Changes in thermic limits and acclimation assessment for an alpine plant by chlorophyll fluorescence analysis: Fv/Fmvs. Rfd

Title:

Changes in thermic limits and acclimation assessment for an alpine plant by chlorophyll fluorescence analysis: Fv/Fmvs. Rfd

Creator:

Perera-Castro, A. V., Brito, P., and González-Rodríguez, A. M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d7c96e3f-ab29-46c5-9f14-30fdcc77686a
uuid:d7c96e3f-ab29-46c5-9f14-30fdcc77686a
issn:0300-3604
doi:10.1007/s11099-017-0691-6

Subject:

horko, vysoká hora, Národní park Teide, teplotní odolnost, index vitality, freezing acclimation, heat, high mountain, Teide National Park, temperature resistance, vitality index, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

A comparison between maximum quantum yield of PSII photochemistry (Fv/Fm) and chlorophyll fluorescence decrease ratio (Rfd) for low and high temperature resistance was assessed in a seasonal study of the acclimation in Pterocephalus lasiospermus. Analyzing the regression adjustment of both parameters and the lethal temperatures (LT50), Rfd resulted in being a more sensitive indicator for low and high temperature treatments, since the thermic resistance estimated with Rfd parameter was never higher than those estimated with Fv/Fm. Furthermore, the use of Fv/Fm led to an overestimation of the acclimation phenomena, with 6ºC of a maximum difference between both parameters. Using Rfd as the indicator parameter, P. lasiospermus acclimated to low temperatures but it kept on being a sensitive species (the lowest LT50 values only achieved -9.9 ± 0.3ºC). However, no heat acclimation was observed (LT50 around 43.5ºC). Thus, according to Rfd evaluation of the thermic threshold, this species could be in risk of damage at low temperatures in this alpine ecosystem., A. V. Perera-Castro, P. Brito, A. M. González-Rodríguez., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

527-536

Source:

Photosynthetica | 2018 Volume:56 | Number:2

Harvested from:

CDK

Metadata only:

false