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The effects of potassium nitrate and NO-donors on phytochrome A- and phytochrome B-specific induced germination of Arabidopsis thaliana seeds

Published online by Cambridge University Press:  22 February 2007

Ivana Batak ,
Marijana Dević ,
Zlatko Gibal ,
Dragoljub Grubišić ,
Kenneth L. Poff  and
Radomir Konjević
Ivana Batak
Affiliation:
Institute of Botany, Faculty of Biology, University of Belgrade, Takovska 43, 11000 Belgrade
Marijana Dević
Affiliation:
Institute for Biological Research ‘S. Stanković’, 29 Novembra 142, 11060 Belgrade, Yugoslavia
Zlatko Gibal
Affiliation:
Institute of Botany, Faculty of Biology, University of Belgrade, Takovska 43, 11000 Belgrade
Dragoljub Grubišić
Affiliation:
Institute for Biological Research ‘S. Stanković’, 29 Novembra 142, 11060 Belgrade, Yugoslavia
Kenneth L. Poff
Affiliation:
Department of Botany and Plant Pathology, Michigan State University, East Lansing, Michigan 48824, USA
Radomir Konjević*
Affiliation:
Institute of Botany, Faculty of Biology, University of Belgrade, Takovska 43, 11000 Belgrade
*
*Correspondence Fax: +381-11-769-903 Email: konjevic@ibiss.bg.ac.yu
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Abstract

Nitrogenous compounds, such as potassium nitrate, potentiate germination of different species of light-requiring seeds. Using light-induced Arabidopsis thaliana seed germination as a model system, our data suggested that only phytochrome A (phyA)-specific induced germination was affected after the exogenous application of nitrates, different nitric oxide (NO)-donors (such as organic nitrates) or sodium nitroprusside. The stimulative effect was very pronounced. Treated seed samples reached maximal germination after very short periods of red-light irradiation. To a far lesser extent, these substances affected phytochrome B (phyB)-specific induced germination. In phyB-specific induced germination, potassium nitrate was most effective, but germination percentages never exceeded 50%. The least effective was sodium nitroprusside, which practically did not affect phyB-specific induced germination. These results were confirmed using corresponding phytochrome mutants.

Keywords

Arabidopsis thalianagerminationlightphytochromespotassium nitratenitric oxide
Type
Research Article
Information
Seed Science Research , Volume 12 , Issue 4 , December 2002 , pp. 253 - 259
Copyright
Copyright © Cambridge University Press 2002

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