Lipid composition of thylakoid membranes of cadmium treated wheat seedlings.
Indian J Biochem Biophys
;
1992 Aug; 29(4): 350-4
Article
Dans Anglais
| IMSEAR
| ID: sea-27755
ABSTRACT
Cadmium (200 ppm) applied through the rooting medium to 30-day-old wheat plants decreased chlorophyll content, net CO2 exchanges and PSII activity by 34, 54 and 43% respectively. Thylakoid total lipids, total glycolipids, total phospholipids and total neutral lipids decreased by 22, 23, 12 and 25%, respectively, under cadmium treatment. Thylakoid membrane glycolipids had three major constituents, viz. monogalactosyl diacylglycerol, digalactosyl diacylglycerol and sulphoquinovosyl diacylglycerol. Monogalactosyl diacylglycerol and digalactosyl diacylglycerol contents decreased by 32 and 27%, respectively, under cadmium. Cadmium application also decreased the concentration of phosphatidyl glycerol and phosphatidyl choline to the extent of about 57 and 31%, respectively. On the other hand, phosphatidic acid and free fatty acids content showed an increase. These compositional changes in thylakoid membranes might be responsible for reduced PSII activity and rate of photosynthesis as observed under cadmium treatment.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Sujet Principal:
Photosynthèse
/
Graines
/
Triticum
/
Cadmium
/
Chlorophylle
/
Chloroplastes
/
Lipides
/
Membranes
langue:
Anglais
Texte intégral:
Indian J Biochem Biophys
Année:
1992
Type:
Article
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS