Effects of water deficit on photosynthetic rate and osmotic adjustment in tetraploid wheats

Title:

Effects of water deficit on photosynthetic rate and osmotic adjustment in tetraploid wheats

Creator:

Rekika, D., Nachit, M. M., Araus, J. L., and Monneveux, P.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:bd5bfe0e-c9ee-4195-834d-249a1f7cf898
uuid:bd5bfe0e-c9ee-4195-834d-249a1f7cf898
issn:0300-3604
doi:10.1023/A:1006890319282

Subject:

drought tolerance, durum wheat, intercellular CO2 concentration, leaf water status, Triticum, water stress, and wild emmer wheat

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Osmotic adjustment, accumulation of soluble saccharides, and photosynthetic gas exchange were studied in five durum wheat (Triticum turgidum L. var. durum) and one wild emmer wheat (Triticum turgidum L. var. dicoccoïdes) cultivars of contrasting drought tolerance and yield stability. Soil water contents (SWC) were 100, 31, 20, and 12 % of maximum capillary capacity. Under mild water stress (SWC 31 to 20 %), osmotic adjustment capacity and high accumulation of saccharides were found in cv. Cham1, a high yielding and drought tolerant cultivar, and in var. dicoccoïdes, while lowest values were noted in the durum wheat landraces Oued-Zenati and Jennah-Khotifa. Under more severe water stress (SWC 12 %), the cv. Cham1 maintained higher net photosynthetic rate (PN) than other genotypes. The observed changes in the ratio intercellular/ambient CO2 concentration (ci/ca) indicated that under mild and severe water stress, the decrease in PN was mainly due to stomatal and non-stomatal factors, respectively. and D. Rekika ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

129-138

Source:

Photosynthetica | 1998 Volume:35 | Number:1

Harvested from:

CDK

Metadata only:

false