Does long-term cultivation of saplings under elevated CO2 concentration influence their photosynthetic response to temperature?

ABSTRACT:

Background and aims

Plants growing under elevated atmospheric CO2 concentrations often have reduced stomatal conductance and subsequently increased leaf temperature. This study therefore tested the hypothesis that under long-term elevated CO2 the temperature optima of photosynthetic processes will shift towards higher temperatures and the thermostability of the photosynthetic apparatus will increase.

Methods

The hypothesis was tested for saplings of broadleaved Fagus sylvatica and coniferous Picea abies exposed for 4-5 years to either ambient (AC; 385 µmol mol(-1)) or elevated (EC; 700 µmol mol(-1)) CO2 concentrations. Temperature response curves of photosynthetic processes were determined by gas-exchange and chlorophyll fluorescence techniques.

Key results

Initial as

SUBMITTER: Sigut L 

PROVIDER: S-EPMC4640122 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature