Photosynthesis in two wheat cultivars differing in salt susceptibility

Title:

Photosynthesis in two wheat cultivars differing in salt susceptibility

Creator:

El-Shintinawy, F.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:5ff9f8be-93df-46f5-838b-d4c6fe54ff84
uuid:5ff9f8be-93df-46f5-838b-d4c6fe54ff84
issn:0300-3604
doi:10.1023/A:1012421826212

Subject:

cultivar differences, ethylene, fatty acids, fluorescence emission spectra, polyamines, proline, putrescine, salinity, spermine, and spermidine

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Salinised (150 mM NaCl for 15 d) roots excised from salt sensitive wheat cultivar Giza 163 showed about 15-fold increase in the ratio of Na/K while salt tolerant Sakha 92 exhibited only 7.5-fold increase compared to their control ratios. Root ratio of saturated/unsaturated fatty acids was stimulated twice in the sensitive cultivar versus 1.7-fold increase in the tolerant ones. Salinity enhanced greatly the accumulation of spermine (Spm) and spermidine (Spd) contents associated with a decrease in putrescine (Put) content in both wheat cultivars. Higher ratios of Spm+Spd/Put associated with lower content of proline and low ethylene evolution were detected in shoots and roots of salt tolerant cultivar. Chlorophyll a/b ratio showed an increase from 1.3 in control of both cultivars to 1.6 and 1.4 in stressed Giza 163 and Sakha 92, respectively. A reduced Hill reaction activity (19 %) was observed in stressed chloroplasts isolated from leaves of the tolerant cultivar versus 40 % inhibition in the sensitive ones. Moreover, chloroplasts isolated from stressed leaves of the sensitive cultivar showed about 25 % reduction in fluorescence emission at 685 nm as well as shifts in the peaks in the visible region.

Language:

Multiple languages

Rights:

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

Coverage:

615-620

Source:

Photosynthetica | 2000 Volume:38 | Number:4

Harvested from:

CDK

Metadata only:

false