Nutritive Values of Brassica campestris L. Oil as Affected by Growth Regulator Treatments

Abstract

The effects of plant growth regulators, viz. Indole acetic acid (IAA), Gibberellic acid (GA) and Abscisic acid (ABA) were studied on fatty acid compositions, glucosinolate content and protein content of Brassica campestris L subsp. Oleifera (common name yellow sarson). Growth regulators were applied in seed soaking solution as well as foliar spray during vegetative phase and at flowering stage. There were reductions in the amount of long chain fatty acids viz erucic acid, eicosenoic acid and increase in the amount Of unsaturated fatty acid viz. linoleic acid by IAA applications. The stimulating effect of IAA which reduced amount of unsaturated fatty acid was more pronounced when applied as foliar spray at vegetative stage. But, foliar spray of ABA during flowering increased the concentration of linoleic acid and reduced the eicosenoic acid and erucic acid. The glucosinolate content was greater in seeds soaked in 10-5 M IAA than that of control but less in 10-5M GA treated seeds than that of control. The ABA treatment (10-5M) increased the concentration of glucosinolates in the seeds. IAA treatments (10-5M) increased the protein percentage in the seeds. Foliar application of GA (10-5M) during vegetative growth and ABA (10-5 M) as seed soaking prior to sowing as well as foliar spry during flowering decreased the protein content of seeds.