New Zealand Journal of Crop and Horticultural Science abstracts

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Short communication

Site of nitrate reduction in Jack bean (Canavalia ensiformis) changes from leaf to root during development

L. S. Camargos
L. F. Aguiar

Departamento de Ciências Naturais
Universidade Federal de Mato Grosso do Sul
Campus de Três Lagoas
Três Lagoas CEP 79600-000 M.S.
Brazil

R. A. Azevedo

Departamento de Genética
Escola Superior de Agricultura Luiz de Queiroz
Universidade de São Paulo
Piracicaba CEP 13418-900 S.P.
Brazil
email: raazeved@esalq.usp.br

Abstract In Jack bean (Canavalia ensiformis), nitrogen metabolism was shown to be drastically altered when different development stages were compared. During development, a change in the location of nitrate reduction and alterations in the relative concentrations of amino acids were observed. Nitrate reductase activity in the roots of C. ensiformis increased during the growth of the plants, being highest at the stage of seed production, whereas leaf nitrate reductase activity showed the reverse pattern, being highest at the vegetative stage and lowest at seed production.

Keywords nitrate reductase; glutamine; amino acids

New Zealand Journal of Crop and Horticultural Science, 2006, Vol. 34: 131–137
0014–0671/06/3402–0131      © The Royal Society of New Zealand 2006
H05098; Online publication date 12 April 2006. Received 30 August 2005; accepted 9 February 2006

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