Effet du NaCl sur l'utilisation des lipides et les activités enzymatiques glyoxysomales au cours de la germination de deux espèces de Medicago

Abstract

The effect of increased NaCl concentrations on seed germination of two Medicago species (M. orbicularis and M. murex) was studied during the first 10 days of development. The effect of NaCl on utilization of storage lipids and on glyoxysomal marker enzymes in cotyledons was also examined. Total lipids, total fatty acids, and triacylglycerols decreased significantly with seedling growth in control cotyledons. Storage lipids disappeared as glyoxysomal enzyme activity appeared. The effect of NaCl on utilization of storage lipids and on glyoxysomal enzyme activity is compared for the two species. Key words: Medicago, germination, NaCl, lipids, glyoxysomal enzymes.