Relationship between carbon and nitrogen metabolisms in photosynthesis. The role of photooxidation processes

Title:

Relationship between carbon and nitrogen metabolisms in photosynthesis. The role of photooxidation processes

Creator:

Chikov, V. and Bakirova, G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:136c8f70-ef40-4082-9079-09694a3946ba
uuid:136c8f70-ef40-4082-9079-09694a3946ba
issn:0300-3604
doi:10.1023/A:1007150921664

Subject:

alanine, aspartate, glycine, glycollate, malate, nitrate, serine, sugars, Triticum aestivum, urea, and wheat

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

14CO2 uptake in leaves of wheat plants (Triticum aestivum L.) fertilized by urea or Ca(NO3)2 (25 mol m-3) was investigated. The Warburg effect (inhibition of 14CO2 uptake by oxygen) under 0.03 vol. % CO2 concentration was observed only in non-fertilized plants. Under 0.03 vol. % CO2, the Warburg antieffect (stimulation of 14CO2 uptake by oxygen) was detected only in plants fertilized by Ca(NO3)2. Under saturating CO2 concentration (0.30 vol. %), the Warburg antieffect was observed in all variants. Under limitation of ribulose-1,5-bisphosphate carboxylase/oxygenase activity (0.30 vol. % CO2 + 1 vol. % O2), the rate of synthesis of glycollate metabolism products decreased in control and urea-fertilized plants but was enhanced in nitrate-fed plants. Hence, there was an activation of glycollate formation via transketolase reaction in fertilized plants, and the products of nitrate reduction function were oxidants in nitrate-fertilized plants whereas the superoxide radical played this role in urea-fertilized plants. and V. Chikov, G. Bakirova.

Language:

Multiple languages

Rights:

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

Coverage:

519-527

Source:

Photosynthetica | 1999 Volume:37 | Number:4

Harvested from:

CDK

Metadata only:

false