Acclimation of photosystem 2 function of Norway spruce induced during first season under elevated CO2 in lamellar domes

Title:

Acclimation of photosystem 2 function of Norway spruce induced during first season under elevated CO2 in lamellar domes

Creator:

Kalina, J., Čajánek, M., Kurasová, I., Špunda, V., Vrána, J., and Marek, M. V.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:20c3542b-4d3e-4aeb-b6de-770229fc75e4
uuid:20c3542b-4d3e-4aeb-b6de-770229fc75e4
issn:0300-3604
doi:10.1023/A:1012473810283

Subject:

chlorophyll fluorescence induction, dry and fresh matter, and Picea abies

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Since July 28th, 1997 the two experimental mini-stands of young Norway spruce [Picea abies (L.) Karst.] have been grown in lamellar domes at ambient (AC) and elevated concentrations of CO2 [EC, i.e., ambient + 350 µmol(CO2) mol-1]. Before the start of exposure to EC (June 1997) the dependencies of photosystem 2 (PS2) quantum yield (Y) on irradiance, estimating the efficiency of PPFD utilisation in PS2 photochemistry, were the same for AC and EC shoots. After one month of EC simulation (August 1997), Y values were higher for EC needles as compared with the AC ones (by 1-42 %), whereas two months later (October 1997) an opposite effect was observed (decrease of Y by from 1 to 33 %). By chlorophyll a (Chl a) fluorescence induction the effects of EC on PS2 function were further characterised. During the first month a moderate improvement of PS2 function was estimated for EC needles from slightly higher potential yield of PS2 photochemistry (FV/FM, by 1 %) and reduced amount of inactive PS2 reaction centres (relative Fp1 level, by 15 %). However, the prolonged exposure to EC led firstly to a slight but significant decrease of FV/FM (by 3 %), secondly to a reduction of half time of fluorescence rise (t1/2, by 14 %), and finally to pronounced accumulation of inactive PS2 reaction centres (by 41 %). From the gradual response of individual Chl a fluorescence parameters we suggest a probable sequence of events determining the stimulation and subsequent depression of PS2 function for Norway spruce during the first season under EC. and J. Kalina ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

621-627

Source:

Photosynthetica | 2000 Volume:38 | Number:4

Harvested from:

CDK

Metadata only:

false