Nazywam się Piotr Szulc. Jestem autorem
wzoru użytkowego nr 64450 pt. "Wazon
Wegetacyjny". Zapraszam do zapoznania się z ich budową i możliwościami ich wykorzystania w badaniach naukowych,
oraz w uprawie roślin. |
PLANT BREEDING AND SEED SCIENCE Volume 46 no. 2 2002
GLUCOSINOLATE CONTENT AND PATHOGENIC FUNGI OCCURRENCE IN SEEDS OF SPRING OILSEED RAPE FERTILISED WITH SULPHUR
Lucyna Drozdowska 1 , Piotr Szulc 1 , Aleksander Lukanowski 2 , Czesław Sadowski 2
1 Department of Plant Physiology, department of Phytopathology, University of Technology and Agriculture Ks. Kordeckiego 20, 85-225 Bydgoszcz
ABSTRACT
Susceptibility of winter oilseed rape to freezing temperatures, increased an interest in cultivation of spring oilseed rape. The relationship between fertilisation with sulphur, glucosinolate content and pathogenic fungi occurrence on the seeds of spring oilseed rape 'Star' was estimated. Sulphur applied in ionic or elementary form at three different doses: 0, 20, 60 kg x ha" 1 modified glucosinolate level. Total alkenyl glucosinolate content depended mainly on the way of sulphur application and the kind of its form, while the dose of sulphur applied was a main factor influencing indolyl glucosinolate content on investigated seeds. Sulphur fertilisation partially reduced intensity of Alternaria brassicae, the only pathogenic fungus frequently occurring on oilseed rape seeds.
Key words: alkenyl glucosinolate, Alternaria brassicae, fertilization, glucosinolate, sulphur, winter oilseed rape,
INTRODUCTION
Oilseed rape is a plant of high requirement for sulphur, which for double improved varieties amounts 88 kg S for the yield of 35 dt.ha -1 (Wielebski and Wojtowicz 1993). Sulphur fertilisation, especially in conditions of low S content, increased seed yield and the content of sulphuric amino acids in protein, however it may reduce the content of oleic acid in lipids and increase glucosinolate content in seeds (Janzen and Bettany 1984, Budzyński and Ojczyk 1995, Rotkiewicz et al. 1996, Szulc et al. 2000).
Toxicity of glucosinolate hydrolytic products to fungi and bacteria has been the subject of several studies. Research on the activity of these compounds and their influence on pathogens occurring on oilseed rape showed that isothiocyanates are toxic to Peronospora parasitica (Greenhalgh and Mitchel 1976), Mycosphaerella brassicae (Harthill and Shutton 1980), Leptosphaeria maculans (Mithen et al. 1986).
|
|