Effect of sulfur on nitrate reductase and ATP sulfurylase activities in groundnut (Arachis hypogea L.)

Document Type

Article

Abstract

Field experiments were conducted to determine the effect of sulfur (S) and Nitrogen (N) on nitrate reductase (NR) and ATP-sulfurylase activities in groundnut cultivars (Arachis hypogea L. cv. Ambar and Kaushal). Two combinations of S (in kg ha-1): OS (-S) and 20S (+S) were used with 20 kg ha -1 N. The application of S enhanced the NR and ATP-sulfurylase activities in both the cultivars at all the growth stages. The application of S also increased soluble protein and chlorophyll content in the all growth stages of both the cultivars. NR and ATP-sulfurylase activities in the leaves were measured at various growth stages as the two enzymes catalyze the rate limiting steps of the assimilatory pathways of nitrate and sulfate, respectively.

Keywords

Atp-sulfurylase, Chlorophyll, Leaf soluble protein, Nitrate reductase, Sulfur

Publication Date

12-31-2006

Publication Title

Journal of Plant Biology

ISSN

12269239

Volume

49

Issue

6

First Page

513

Last Page

517

Digital Object Identifier (DOI)

10.1007/BF03031134

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