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

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 e...

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Bibliographic Details
Published in:Seed science research 2002-12, Vol.12 (4), p.253-259
Main Authors: Batak, Ivana, Dević, Marijana, Gibal, Zlatko, Grubišić, Dragoljub, Poff, Kenneth L., Konjević, Radomir
Format: Article
Language:English
Subjects:
Arabidopsis thaliana
germination
Irradiation
light
mutants
Nitrates
Nitric oxide
nitrogen compounds
nitroprusside
phytochrome
phytochromes
potassium nitrate
red light
Seed germination
Seeds
Sodium
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Summary: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.
ISSN:0960-2585
1475-2735
DOI:10.1079/SSR2002118