Effects of long-term enhanced CO2 partial pressure on gas exchange parameters and saccharide pools of wheat leaves

Title:

Effects of long-term enhanced CO2 partial pressure on gas exchange parameters and saccharide pools of wheat leaves

Creator:

Greiner de Mothes, M.A. and Knoppik, D.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:82570a94-1ac4-4b49-ac7a-e310cf2d8961
uuid:82570a94-1ac4-4b49-ac7a-e310cf2d8961
urnnbn:urn:nbn:cz:aba007-000flj

Type:

model:internalpart and TEXT

Format:

print

Description:

Wheat plants were cultivated in a growth chamber at normál (35 Pa, C35 plants) and enhanced (70 Pa, C70 plants) CO2 partial pressure. In C35 plants the net photosynthetic rate (P^) of flag leaves and the concentrations of saccharides such as sucrose, glucose, fructose and starch were increased. The C70 plants possessed higher chlorophyll (Chl) a and Chl b contents. The CO2 response of Pn at saturating photosynthetically active radiation (PAR) was very similar for both variants. At the highest CO2 concentration saccharides accumulated in both variants as a consequence of decreased export rate. The response of to ^t saturating CO2 concentrations was similar in the two variants. On the other hand, the response of water vapour pressure conductance (gH2o) to PAR in C35 plants followed a hyperbolic response to PAR, while in the Cjq plants it was linearly related to PAR up to the mean PAR ušed for growth. In this variant ^^20 seemed to change parallelly to changes in the mesophyll demand for CO2 caused by PAR.

Language:

Multiple languages

Rights:

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

Coverage:

435-445 and 117-127

Source:

Photosynthetica | 1994 Volume:30 | Number:3

Harvested from:

CDK

Metadata only:

false