Abstract
Biosynthesis of polar lipids (phospho- and glycolipids) from [1- 14C]acetate was observed in mature needles from hydroponically grown jack pine seedlings. Treatment of the seedlings with vanadium (V) or nickel (Ni) produced marked concentration-dependent inhibitions in the biosynthesis of all polar lipids. Nickel appeared to be more inhibitory than V at 10 ppm. Fumigation of seedlings with gaseous SO 2 (0.34 ppm) also resulted in reduced biosynthesis of polar lipids. Combined treatment of plant seedlings with metal (V or Ni) and SO 2 produced inhibitory effects that were very similar to those produced by metal alone; however, SO 2 did produce an additive inhibitory effect at 10 ppm V.
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