Journal of Food, Agriculture and Environment

Vol 3, Issue 1,2005
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Relationship between proline metabolism and NAD kinase in green bean plants subjected to short-term salt stress


Juan M. Ruiz *, Rosa M. Rivero, Luis Romero

Recieved Date: 2004-08-18, Accepted Date: 2004-11-11


The aim of the study was to determine whether short-term salt stress increases concentration of cytoplasmic Ca²+ ([Ca²+]cyt) by activating the enzyme Ca²+-calmodulin-dependent nicotinamide adenide dinucleotide kinase (Ca²+-CaM-NAD kinase; EC, and whether these stress-induced variations trigger changes in the adaptive response of plants, as in proline metabolism. To address this question, we subjected 15-d-old green bean plants to salt stress (250 mM of NaCl) for 3 h. Plants showed foliar accumulation of proline, defining the enzymes Δ¹-pyrroline-5-carboxylate synthetase (P5CS; EC and proline dehydrogenase (PDH; EC as determinant in the foliar accumulation of this amino acid during salt stress. In addition, we found a close relationship between Ca²+-CaM-dependent NAD kinase and proline metabolism, suggesting that the adaptive responses or acclimation of plants under salt stress are preceded by an increase in the concentration of cytoplasmic Ca²+.


Adaptative response, salt stress, NAD kinase, Phaseolus vulgaris, proline metabolism

Journal: Journal of Food, Agriculture and Environment
Year: 2005
Volume: 3
Issue: 1
Category: Agriculture
Pages: 195-198

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :