Author:
Ahmad Altaf,Khan Ishrat,Abdin M. Z.
Abstract
The effect of sulfur (S) fertilisation on oil accumulation, acetyl-CoA
concentration, and activity of acetyl-CoA carboxylase (EC 6.4.1.2) was
determined in the developing seeds of rapeseed
(Brassica campestris L. cv. Pusa Gold) grown in the
field with and without S. The period between 14 and 35 days after flowering
(DAF) was identified as the active period of oil accumulation in the
developing seeds of rapeseed. The accumulation of oil was preceded by a marked
rise in acetyl-CoA carboxylase activity and acetyl-CoA concentration, which
declined rapidly when oil accumulation reached a plateau. Starch and soluble
sugar content decreased, while protein content increased during the period of
active oil accumulation in the developing seeds (i.e. 14–35 DAF). Sulfur
fertilisation significantly (P < 0.05) enhanced the
oil accumulation in the developing seeds at all the growth stages except at 7
DAF. The increase in the oil content was 13.0–52.0% with S
fertilisation over the control treatment. Sulfur fertilisation also increased
acetyl-CoA concentration, acetyl-CoA carboxylase activity, and soluble
protein, sugar, and starch content in the developing seeds. It is suggested
that the increase in the oil content with S fertilisation may be associated
with increases in acetyl-CoA carboxylase activity through the enhancement of
acetyl-CoA concentration. Further, the increased sugar content due to S
fertilisation provided enough carbon sources for oil biosynthesis.
Subject
General Agricultural and Biological Sciences
Cited by
18 articles.
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