Photosynthetic response of wheat to stress induced by Puccinia recondita and post-infection drought

Title:

Photosynthetic response of wheat to stress induced by Puccinia recondita and post-infection drought

Creator:

Bethenod, O., Huber, L., and Slimi, H.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:183c6e16-ba71-4a1c-94a1-3ff2fda4afa6
uuid:183c6e16-ba71-4a1c-94a1-3ff2fda4afa6
issn:0300-3604
doi:10.1023/A:1015664314720

Subject:

biotic stress, brown rust, intercellular CO2 concentration, leaf gas exchange, plan growth, respiration rate, stomata conductance, stress interaction, Triticum aestivum L., and water stress

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

To quantify photosynthetic response of wheat to the combination of a fungal brown rust infection and a post-infection drought, four treatments were compared: no stress (control), fungal stress (FS), water stress (WS), and twofold stress (WS×FS). Predawn leaf water potential (Ψwp) was similar in FS and WS treatments over a 3-week period. In the WS treatment, net photosynthetic rate (PN) and stomata CO2 conductance (gs) diminished concomitantly with a constant intercellular CO2 concentration (Ci) close to 200 µmol mol-1. In the FS treatment, a reduction of PN occurred with an increase in respiration rate (doubling of the CO2 compensation concentration) and in Ci but with no water loss modification. Healthy leaves of infected plants (FS) showed a reduction of PN as well, with constant gs and increased Ci. In the twofold stress treatment (WS×FS), leaves showed reduced PN in relation to the lower Ψwp. Deleterious effects of both drought and fungal infection on the final area of leaves and dry matter were additive. and O. Bethenod, L. Huber, H. Slimi.

Language:

Multiple languages

Rights:

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

Coverage:

581-590

Source:

Photosynthetica | 2001 Volume:39 | Number:4

Harvested from:

CDK

Metadata only:

false