Impact of measurement irradiance on acclimation of photosynthesis to elevated CO2 concentration in several plant species

Title:

Impact of measurement irradiance on acclimation of photosynthesis to elevated CO2 concentration in several plant species

Creator:

Bunce, J. A. and Ziska, L. H.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:429e4b86-86b4-418f-8863-e0e81feea9ea
uuid:429e4b86-86b4-418f-8863-e0e81feea9ea
issn:0300-3604
doi:10.1023/A:1007198819846

Subject:

acclimation, CO2-enrichment, photon flux density, and quantum yield

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Controlled environment chamber and glasshouse studies were conducted on six herbaceous annual species grown at 350 (AC) and 700 (EC) μmol(CO2) mol-1 to determine whether growth at EC resulted in acclimation of the apparent quantum yield of photosynthesis (QY) measured at limiting photosynthetic photon flux density (PPFD), or in acclimation of net photosynthetic rate (PN) measured at saturating PPFD. It was also determined whether acclimation in PN at limiting PPFD was correlated with acclimation of carboxylation efficiency or ribulose-1,5-bisphosphate (RuBP) regeneration rate measured at saturating PPFD. Growth at EC reduced both the QY and PN at limiting PPFD in three of the six species. The occurrence of photosynthetic acclimation measured at a rate limiting PPFD was independent of whether photosynthetic acclimation was apparent at saturating measurement PPFD. At saturating measurement PPFD, acclimation to EC in the apparent carboxylation efficiency and RuBP regeneration capacity also occurred independently. Thus at least three components of the photosynthetic system may adjust independently when leaves are grown at EC. Estimates of photosynthetic acclimation at both high and low PPFD are necessary to accurately predict photosynthesis at the whole plant or canopy level as [CO2] increases. and J. A. Bunce, L. H. Ziska.

Language:

Multiple languages

Rights:

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

Coverage:

509-517

Source:

Photosynthetica | 1999 Volume:37 | Number:4

Harvested from:

CDK

Metadata only:

false