Bioaktywne metabolity ryzosferowych bakterii PseudomonasJankiewicz

• Autorzy: Jankiewicz U.

Warianty tytułu

EN

Bioactive metabolites of the rhizosphere Pseudomonas bacteria

• Języki publikacji: PL

Abstrakty

PL

Celem badań było określenie, jakie metabolity, bioaktywne względem wybranych fitopatogenów zbóż, są syntetyzowane przez wyizolowane z ryzosfery pszenicy bakterie Pseudomonas. Do doświadczeń wybrano dwa różne szczepy bakterii Pseudomonas fluorescens, które charakteryzowały się w warunkach in vitro silnym antagonizmem w stosunku do fitopategenów zbóż z rodzaju Pyrenophora Alteria i Fusarium. Jak wykazały badania obydwa szczepy bakterii w warunkach doświadczeń intensywnie wydzielały cyjanowodór oraz siderofory, w tym piowerdynę. Kwas salicylowy lub jego pochodną wykryto w hodowli tylko jednego z badanych izolatów. Obydwa zastosowane w doświadczeniu szczepy P. fluorescens charakteryzowały się zdolnością do syntezy zewnątrzkomórkowych peptydaz o różnym poziomie aktywności. W hodowlach bekterii nie wykryto enzymów litycznych zdolnych do rozkładu wiązań glikozydowych - chitynazy i ß-1,3 glukanazy.

EN

The study was aimed at estimating which metabolites (bioactive towards selected cereal plant phatogens) are synthesized by Pseudomonas isolated from wheat rhizosphere. Two different strains of Pseudomonas fluorescens characterised by the strong in vitro antagonism in relation to cereal plant phatogens of the genera Pyrenophora , Alterial and Fusarium were selected for experiments. Both bacterial strains under experimental conditions intensively released hydrogen cyanide and siderophores including pyoverdine. Salicylic acid and its derivative were found in the culture of only one of analysed isolates. Both strains of P. fluoroscens were able to synthesize extracellular peptidases of different activity. No hydrolysing enzymes able to decompose glycoside bonds (chitinase and ß-1.3 gluconase) were found bacterial cultures.

Słowa kluczowe

PL

antagonizm; fitopatogeny; Pseudomonas

EN

antagonism; plant pathogen; Pseudomonas

• Wydawca: Wydawnictwo ITP
• Czasopismo: Woda-Środowisko-Obszary Wiejskie
• Rocznik: 2010
• Tom: T. 10, z. 2
• Strony: 83--92
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Jankiewicz U.

• Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, Wydział Rolnictwa i Biologii, Katedra Biochemii, ul. Nowoursynowska 159, 02-776 Warszawa; tel. [phone],

Bibliografia

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