Responses of two olive tree (Olea europaea L.) cultivars to elevated CO2 concentration in the field

Title:

Responses of two olive tree (Olea europaea L.) cultivars to elevated CO2 concentration in the field

Creator:

Tognetti, R., Sebastiani, L., Vitagliano, C., Raschi, A., and Minnocci, A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:631cb462-1d16-4d78-a892-be31134fe187
uuid:631cb462-1d16-4d78-a892-be31134fe187
issn:0300-3604
doi:10.1023/A:1015186411662

Subject:

chlorophyll, FACE, gas exchange, global change, intercellular CO2 concentration, net photosynthetic rate, photorespiration, ribulose-1,5-bisphosphate carboxylase/oxygenase, stomata density, stomatal conductance, and transpiration efficiency

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Five-year-old plants of two olive cultivars (Frantoio and Moraiolo) grown in large pots were exposed for 7 to 8 months to ambient (AC) or elevated (EC) CO2 concentration in a free-air CO2 enrichment (FACE) facility. Exposure to EC enhanced net photosynthetic rate (PN) and decreased stomatal conductance, leading to greater instantaneous transpiration efficiency. Stomata density also decreased under EC, while the ratio of intercellular (Ci) to atmospheric CO2 concentration and chlorophyll content did not differ, except for the cv. Moraiolo after seven months of exposure to EC. Analysis of the relationship between photosynthesis and Ci indicated no significant change in carboxylation efficiency of ribulose-1,5-bisphosphate carboxylase/oxygenase after five months of exposure to EC. Based on estimates derived from the PN-Ci relationship, there were no apparent treatment differences in daytime respiration, CO2 compensation concentration, CO2-saturated photosynthetic rate, or photosynthetic rate at the mean Ci, but there was a reduction in stomata limitation to PN at EC. Thus 5-year-old olive trees did not exhibit down regulation of leaf-level photosynthesis in their response to EC, though some indication of adjustment was evident for the cv. Frantoio with respect to the cv. Moraiolo. and R. Tognetti ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

403-410

Source:

Photosynthetica | 2001 Volume:39 | Number:3

Harvested from:

CDK

Metadata only:

false