Effects of water-deficit on lipids of safflower aerial parts.
Three-week-old plants of safflower (Carthamus tinctorius L.) were subjected to a water-deficit stress. The lipid composition of the shoot parts of both control (well-watered) and water stressed plants was analyzed. Experimental data revealed that moderate stress induced an increase in total lipid content within all lipidic classes. However, severe water-deficit induced a sharp decrease in the total lipid content and specially in polar lipids, particularly in phosphatidylethanolamine, phosphatidylcholine, monogalactosyl-diacylglycerol and digalactosyl-diacylglycerol. Also, the content of neutral lipids was increased. Concerning the fatty acid composition, water-deficit induced a decrease in their degree of unsaturation expressed by a reduction in the proportions of linolenic (18:3) and linoleic (18:2) acids and most of lipidic classes.
Hamrouni
I
I
INRST, Laboratoire d'Adaptation et d'Amélioration des Plantes, BP 95 2050, Hammam-Lif, Tunisia.
Salah
H B
HB
Marzouk
B
B
D019659:Asteraceae / Q000737:chemistry*; D005227:Fatty Acids / Q000032:analysis; D008055:Lipids / Q000032:analysis*; D014867:Water
D005227:Fatty Acids; D008055:Lipids; D014867:Water