Endophytic bacteria colonizing plant tissues can play an important role in biotechnology through their plant growth promoting traits. Here we tested endophytic bacterial isolates obtained from the following host plants: maize (Zea mays L.), soy (Glicyne sp. Wilt), rape (Brassica napus L.), wheat (Triticum aestivum L.), poinsettia (Euphorbia pulcherrima Willd. ex Klotzsch), calla (Zantedeschia sp. Spreng), geranium (Pelargonium sp. L`Her), rose (Rosa sp. L.), onion (Allium cepa L.), pea (Pisum sativum L.), cauliflower (Brassica oleracea L.) and cucumber (Cucumis L.). Growth promoting traits of the isolates were first examined on microbiological media. Next that exhibited the desired properties were identified using BIOLOG GEN III system. In general we obtained and tested 109 bacterial isolates. The performed tests revealed that 63% of examined isolates were able to dissolve inorganic phosphates, further 49% showed ability to protease production and 39% to lipase production. Another part (10%) of tested isolates showed cellulase and pyoverdine production ability.

Endofityczne bakterie żyjące w tkankach roślin mogą odegrać znaczącą rolę w biotechnologii poprzez wspomaganie wzrostu roślin, jako tzw. PGPB (Plant Growth-Promoting Bacteria). Badano izolaty bakteryjne pozyskane z tkanek roślin: (a) uprawnych: kukurydzy (Zea mays L.), soi (Glicyne sp. Wilt), rzepaku (Brassica napus L.), pszenicy (Triticum aestivum L.); (b) roślin ozdobnych: poinsecji (Euphorbia pulcherrima Willd. ex Klotzsch), kalii (Zantedeschia sp. Spreng), pelargonii (Pelargonium sp. L`Her), róży (Rosa sp. L.) oraz (c) roślin ogrodniczych: cebuli (Allium cepa L.), grochu (Pisum sativum L.), kalafiora (Brassica oleracea L.) i ogórka (Cucumis L.). Otrzymane izolaty bakteryjne badano na pożywkach mikrobiologicznych, w celu sprawdzenia czy wykazują one cechy biochemiczne, wspomagające wzrost roślin. Następnie, wybrane izolaty bakteryjne wykazujące pożądane cechy identyfikowano przy użyciu systemu BIOLOG GEN III. Ogółem pozyskano i przebadano 109 izolatów bakterii. Na podstawie przeprowadzonych testów wykazano, że 63% badanych izolatów ma zdolność do rozpuszczania fosforanów nieorganicznych, kolejne 49% wykazuje zdolność do produkcji proteazy oraz lipazy (39%). Część (10%) badanych izolatów wykazywało zdolność do wytwarzania celulazy i pyowerdyny.

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