Effect of cadmium on photosynthesis and enzymes of photosynthetic sulphate and nitrate assimilation pathways in maize (Zea mays L.)

Title:

Effect of cadmium on photosynthesis and enzymes of photosynthetic sulphate and nitrate assimilation pathways in maize (Zea mays L.)

Creator:

Ferretti, M., Ghisi, R., Merlo, L., Dalla Vecchia, F., and Passera, C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:8a4e6854-90d7-4385-8e96-60c7938e6f0f
uuid:8a4e6854-90d7-4385-8e96-60c7938e6f0f
urnnbn:urn:nbn:cz:aba007-000fg0

Type:

model:internalpart and TEXT

Format:

print

Description:

Chlorophyll content, photosynthetíc oxygen evolution and the activities of ATP- sulphurylase (ATP-s) (E.C. 2.7,7.4.), OAS-sulphydrylase (OAS-s) (E.C, 4.2.99.8.), nitráte reductase (NR) (E.C. 1.6.6.1.) and glutamine synthetase (GS) (E.C. 6.3.1.2), were determined in leaves of Zea mays L. Dekalb cv. Sponsor plants grown in the presence of 0, 10, 100, 250 pM Cd in order to evaluate the effect of this metal on sulphate and nitráte assimilation pathway. Cd induced a slight decrease of photosynthetíc oxygen evolution (-21 % of the control at 250 pM), whereas the enzyme activities were differently influenced: OAS-s and GS increased up to 40 and 25 % of the control, respectively, at 250 pM Cd; NR showed a 20 % stimulation at 100 pM Cd, and ATP-s was slightly inhibited. The results stress the importance of experimental conditions adopted on the response of enzyme activities to Cd and suggest that the observed increases of enzyme activities are related to a defence mechanism.

Language:

Multiple languages

Rights:

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

Coverage:

49-54 and 51-56

Source:

Photosynthetica | 1993 Volume:29 | Number:1

Harvested from:

CDK

Metadata only:

false