Photosynthetic enzymes of the C4 grass Setaria sphacelata under water stress: A comparison between rapidly and slowly imposed water deficit

Title:

Photosynthetic enzymes of the C4 grass Setaria sphacelata under water stress: A comparison between rapidly and slowly imposed water deficit

Creator:

Marques da Silva, J. and Arrabaça, M. C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:12b9d21e-792e-4df2-8c6f-1768b7b8b465
uuid:12b9d21e-792e-4df2-8c6f-1768b7b8b465
issn:0300-3604
doi:10.1023/B:PHOT.0000040568.58103.ca

Subject:

NADP-malic enzyme, phosphoenolpyruvate carboxylase, and ribulose-1,5-bisphosphate carboxylase/oxygenase

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Two stress imposing systems were used: a rapid stress developed by allowing excised leaves to loose water by transpiration, and a slow stress developed by withholding watering of potted plants. Carboxylating enzymes reacted differently on both types of stress. Rapid stress increased ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPCO) activation, but both activities (initial and total) showed little variation with stress. Under slow stress the activation did not change, although both activities decreased much under stress. Phosphoenolpyruvate carboxylase (PEPC) showed a deep decrease of activity under rapid stress, nevertheless, a certain recovery was found under extreme stress. On the other hand, under slow stress the activity of PEPC showed a linear increase with decreasing relative water content. The ratio between physiological and maximal activity increased slightly under both types of stress. The activity of malic enzyme did not change under rapid stress, and decreased linearly under slow stress. and J. Marques da Silva, M. C. Arrabaça.

Language:

Multiple languages

Rights:

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

Coverage:

43-47

Source:

Photosynthetica | 2004 Volume:42 | Number:1

Harvested from:

CDK

Metadata only:

false