Photosynthetic nutrient use efficiency, nodule activity and solute accumulation ín drought stressed alfalfa plants

Title:

Photosynthetic nutrient use efficiency, nodule activity and solute accumulation ín drought stressed alfalfa plants

Creator:

Antolín, M. C. and Sánchez-Díaz, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:90258acf-ad1c-49da-8d22-5b53d71eed82
uuid:90258acf-ad1c-49da-8d22-5b53d71eed82
urnnbn:urn:nbn:cz:aba007-000fcd

Type:

model:internalpart and TEXT

Format:

print

Description:

Effect of temporary drought on the photosynthetic characteristics, the photosynthetic nutrient-use efficiency (PNUE, PPUE), the water-use efficiency (WUE), acetylene reduction nodule activity (ARA) and the solute accumulation has been examined in nodulated alfalfa plants. The plants were subjected to moderate or severe cycles of drought (drought-recovery). Growth decreased markedly imder the water deficit, but no significant differences were found between either level of drought. As stress progressed, the plants developed higher root/shoot ratios than Controls. ARA declined progressively during water deficit treatments and upon rewatering no recovery was observed. PNUE and PPUE markedly decreased, whereas WUE increaseď in drought treated plants. Proline and inorganic cations (K, Ca, Mg) concentrations were always higher in drought-stressed plants, but sugar (TSS) content increased only in roots and nodules. Hence, imder cyclic drought nodulated alfalfa plants adjusted osmotically and achieved an improved WUE, which suggested an enhanced drought tolerance.

Language:

Multiple languages

Rights:

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

Coverage:

595-604 and 171-180

Source:

Photosynthetica | 1992 Volume:27 | Number:4

Harvested from:

CDK

Metadata only:

false