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2010 | 32 | 6 |
Tytuł artykułu

Nitric oxide affecting root growth, lignification and related enzymes in soybean seedlings

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This study analyzed the involvement of nitric oxide (NO) in the root lignification of soybean seedlings. To this end, changes in root cell viability; phenylalanine ammonia-lyase (PAL) and soluble and cell wall bound peroxidase (POD) activities and lignin and hydrogen peroxide (H₂O₂) contents of soybean roots treated with the NO-donor sodium nitroprusside (SNP) and its relationships with root growth were evaluated. Seedlings were cultivated in a nutrient solution supplemented with 5 to 1,000 μM SNP for 24 h. At an extremely low concentration (5 μM), SNP induced root growth and increased lignification and activities of related enzymes (PAL and cell wall-bound POD). At a high concentration (1,000 μM), SNP reduced root growth and lignification (PAL activity and H₂O₂ and lignin contents) and caused a loss of cell viability. Application of potassium ferrocyanide (an analog of SNP that cannot release NO) and PTIO (2-phenyl-4,4,5,5,-tetramethylimidazoleline-1-oxyl-3-oxide, a scavenger of NO) revealed that the inhibitory/stimulatory effects on root lignification may be due to NO itself. These results indicate that NO, depending on its concentration, may act as a stress factor, due to its toxic action, or as a signal molecule, inducing soybean root growth and lignification.
Słowa kluczowe
EN
Wydawca
-
Rocznik
Tom
32
Numer
6
Opis fizyczny
p.1039-1046,fig.,ref.
Twórcy
  • Laboratory of Plant Biochemistry, Department of Biochemistry, University of Maringa´, Av. Colombo, 5790, Maringa´, PR 87020-900, Brazil
autor
  • Laboratory of Plant Biochemistry, Department of Biochemistry, University of Maringa´, Av. Colombo, 5790, Maringa´, PR 87020-900, Brazil
  • Laboratory of Plant Biochemistry, Department of Biochemistry, University of Maringa´, Av. Colombo, 5790, Maringa´, PR 87020-900, Brazil
  • Laboratory of Plant Biochemistry, Department of Biochemistry, University of Maringa´, Av. Colombo, 5790, Maringa´, PR 87020-900, Brazil
  • Laboratory of Plant Biochemistry, Department of Biochemistry, University of Maringa´, Av. Colombo, 5790, Maringa´, PR 87020-900, Brazil
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-0f091073-3a09-4f53-a703-9b2f8b8c2af7
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