Effects of cell suspension and cell-free culture filtrate of Pseudomonas aeruginosa in the control of root rot-root knot disease complex of tomato [Lycopersicon esculentum Mill.]

• Autorzy: Siddiqui I A
• Języki publikacji: EN

Abstrakty

EN

The plant growth-promoting rhizobacterium Pseudomonas aeruginosa strain IE-6 was tested for antagonistic activity towards Meloidogyne javanica, the root-knot nematode and soilbome root-infecting fungi viz., Macrophomina phaseolina. Fusarium solani and Rhizoctonia solani under laboratory and greenhouse conditions. Cell-free culture filtrate of the bacterium caused significant reduction in egg hatching of M. javanica and inhibited radial growth of fungi in vitro. Cell-free culture filtrate also caused lyses in mycelium of F. solani. Under greenhouse conditions, soil drenches with the aqueous celi suspension or cell-free culture resulted in a considerable reduction in nematode population densities in soil and subsequent root-knot development due to M.javanica. In addition to nematode control, rhizobacterium application also inhibited root-infection caused by soilborne root-infecting fungi with significant enhancement of growth of tomato seedlings.

PL

W warunkach laboratoryjnych i szklarniowych była testowana bakteria ryzosferowa Pseudomonas aeruginosa szczep IE-6 oddziaływująca korzystnie na wzrost roślin, dla określenia antagonistycznej aktywności względem Meloidogyne javanica nicienia powodującego guzowatość korzeni oraz takich grzybów glebowych porażających korzenie jak Macrophomina phaseolina, Fusarium solani i Rhizoctonia solani. Filtraty kultur bez komórek bakterii powodowały znaczną redukcję wylęgania się z jaj larw Meloidogyne javanica i hamowały promienisty wzrost grzybów w warunkach in vitro. Filtraty kultur bez komórek powodowały także lizę strzępek F. solani. W warunkach szklarniowych zanotowano znaczną redukcję gęstości populacji nicieni w glebie, a następnie rozwoju guzów na korzeniach powodowanych przez M. javanica, gdy do gleby wprowadzono wodną zawiesiną komórek lub filtrat bez komórek. Zwalczanie nicieni oraz zastosowanie bakterii ryzosferowej ograniczało porażenie korzeni także przez grzyby przeżywające w glebie oraz wspomagało wzrost siewek pomidora.

Słowa kluczowe

EN

plant disease; root rot; root-infecting fungi; Lycopersicon esculentum; cell suspension; Pseudomonas aeruginosa; nematode; fungi; cell-free culture; tomato

• Wydawca: -
• Czasopismo: Acta Agrobotanica
• Rocznik: 2000
• Tom: 53
• Numer: 2
• Opis fizyczny: p.47-55

Twórcy

autor

Siddiqui I A

• University of Karachi, Karachi-75270, Pakistan

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