Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 5

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Relationship between peroxidase activity and the amount of fully N-methylated compounds in bean plants infected by Pseudomonas savastanoi pv. phaseolicola

100%

Sardi E. , Stefanovits-Banyai E.

Acta Physiologiae Plantarum

2006

tom 28

nr 2

Changes in the level of endogenous formaldehyde (HCHO), some N-methylated compounds (choline and trigonelline) and peroxidase activity were examined in the leaves of bean genotypes (Phaseolus vulgaris L.) with different disease-sensitivity during ontogenesis in the stressfree condition and after natural infection by Pseudomonas savastanoi pv. phaseolicola (until the appearance of lesions). HCHO, as its dimedone adduct, and fully N-methylated compounds were determined by overpressured layer chromatography (OPLC) in different developmental stages and in the infected leaves/leaf discs. Peroxidase activity was measured by a spectrophotometric method. HCHO level decreased with agetng of the primary leaf and accordingly in the leaves at different developmental stages, then increased again in both cases due to the demethylation and methylation processes. Concentration of choline and trigonelline as potential HCHO generators des creased considerably while peroxidase activity increased with agetng of the plants. Comparing the symptomless and the Pseudomonas infected leaf discs (with watersoaked lesions) we found a decrease in the level of HCHO, choline and trigonelline and there was det ectable increase in the peroxidase activity in the infected leaftissues. Our findings are in accordance with previously published results that peroxidases play an important role in oxidative demethylation processes. Our hypothesis is that the high level of HCHO in the old leaves can originate from methylated components as the result of peroxidase activity and this high level may lead to the old leaf betng resistant to pathogen. This conclusion is supported by the fact that the leaves of susceptible bean genotypes became resistant to Pseudomonas while growing older.

Comparison of calcium, magnesium, potassium and sodium contents in Ginkgo biloba L. leaves from Hungary

71%

Stefanovits-Banyai E. , Bertenyi-Divinyi Z. , Kiss A. S. , Blazovics A. , Koczka N.

Journal of Elementology

2002

tom 07

nr 1

49-56

Cadmium induced stress effects in transgenic tobacco plants overexpressing alfaalfa aldehyde reductase or ferritin

61%

Hegudus A. , Toth E. , Janda T. , Stefanovits-Banyai E. , Sardi E. , Dudits D. , Erdei S.

Acta Physiologiae Plantarum

2004

tom 26

nr 3 suppl.

Fluctuations of protein and mineral element contents in green pea varieties as affected by Mg-sulphate foliar fertilisation

61%

Takacs-Hajos M. , Kiss A. S. , Kastori R. , Ravel J. , Stefanovits-Banyai E. , Sekulic P.

Journal of Elementology

2005

tom 10

nr 4 Suppl.1

106-107

Variation in fatty acid composition of oil from achenes in some species of the family Asteraceae

51%

Kiss A. S. , Kastori R. , Pucarevic M. , Holly L. , Vorosvary G. , Stefanovits-Banyai E. , Horvath L. , Sekulic P. , Takacs-Hajos M.

Journal of Elementology

2005

tom 10

nr 4 Suppl.1

41-42