Thermal acclimation of the temperature dependence of the VCmax of Rubisco in quinoa

Title:

Thermal acclimation of the temperature dependence of the VCmax of Rubisco in quinoa

Creator:

Bunce, J. A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b6ef0521-1738-4f68-9498-3b265eb5f521
uuid:b6ef0521-1738-4f68-9498-3b265eb5f521
issn:0300-3604
doi:10.1007/s11099-018-0799-3

Subject:

fotosyntéza, photosynthesis, carboxylation, mesophyll conductance, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Changes in the temperature dependence of the maximum carboxylation capacity (VCmax) of Rubisco during thermal acclimation of PN remain controversial. I tested for acclimation of the temperature dependence of VCmax in quinoa, wheat, and alfalfa. Plants were grown with day/night temperatures of 12/6, 20/14, and 28/22°C. Responses of PN to substomatal CO2 (Ci) and CO2 at Rubisco (Cc) were measured at leaf temperatures of 10-30°C. VCmax was determined from the initial slope of the PNvs. Ci or Cc curve. Slopes of linear regressions of 1/VCmaxvs. 1/T [K] provided estimates the activation energy. In wheat and alfalfa the increases in activation energy with growth temperature calculated using Ci did not always occur when using Cc, indicating the importance of mesophyll conductance when estimating the activation energy. However, in quinoa, the mean activation energy approximately doubled between the lowest and highest growth temperatures, whether based on Ci or Cc., J. A. Bunce., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

1171-1176

Source:

Photosynthetica | 2018 Volume:56 | Number:4

Harvested from:

CDK

Metadata only:

false