Drought effects on membrane lipids and photosynthetic activity in different peanut cultivars

Title:

Drought effects on membrane lipids and photosynthetic activity in different peanut cultivars

Creator:

Lauriano, J. A., Lidon, F. C., Carvalho, C. A., Campos, P. S., and do Céu Matos, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a84a7c29-ddda-41b7-8178-4feb4b30d4d2
uuid:a84a7c29-ddda-41b7-8178-4feb4b30d4d2
issn:0300-3604
doi:10.1023/A:1026775319916

Subject:

Arachis hypogaea, digalactosyldiacylglycerol, galactolipids, membrane stability, monogalactosyldiacylglycerol, phosphatidylglycerol, phosphatidylinositol, phospholipids, polyethylene glycol, and water deficit

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The effects of drought on thylakoid acyl lipid composition, photosynthetic capacity (P max), and electrolyte lekage were evaluated in two-months-old peanut cultivars (57-422, 73-30, GC 8-35) growing in a glasshouse. For lipid studies, plants were submitted to three treatments by withholding irrigation: control (C), mild water stress (S1), and severe water stress (S2). Concerning membrane and photosynthetic capacity stability, drought was imposed by polyethylene glycol (PEG 600). In the cv. 73-30 a sharp decrease in the content of thylakoid acyl lipids was observed, already under S1 conditions, whereas cv. 57-422 was strongly affected only under S2. Cv. GC 8-35 had the lowest content of acyl lipids under control conditions, a significant increase under S1 conditions, and only under S2 a decrease occurred. Thus concerning lipid stability, cv. 73-30 was the most sensitive. Among lipid classes, phospholipids and galactolipids were similarly affected, as was MGDG relatively to DGDG. Water deficit imposed by PEG induced a higher increase in electrolyte leakage in cv. 73-30 than in the other cvs. A positive relationship between acyl lipid concentration and membrane integrity was found in all studied cvs. A positive association between acyl lipid concentration, membrane integrity, and P max was found in the cvs. 57-422 and 73-30. and J. A. Lauriano ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

7-12

Source:

Photosynthetica | 2000 Volume:38 | Number:1

Harvested from:

CDK

Metadata only:

false