Chemotaxis of fluorescent pseudomonads towards seed exudates and germinating seeds in solarized soil

We investigated the chemotaxis of fluorescent pseudomonads towards seeds exudates and germinating tomato seeds. Chemotaxis of Pseudomonas putida and P. fluorescens in a capillary tube was more pronounced towards exudates originating from seeds that were germinated in solarized soil than towards comp...

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Bibliographic Details
Published in:Phytopathology 1992-03, Vol.82 (3), p.328-332
Main Authors: Gamliel, A. (Hebrew University of Jerusalem, Rehovot, Israel), Katan, J
Format: Article
Language:English
Subjects:
AGENT PATHOGENE
Agronomy. Soil science and plant productions
ANIMAL UTILE
ANIMALES UTILES
BACTERIA
Biochemistry and biology
Biological and medical sciences
Chemical, physicochemical, biochemical and biological properties
ESTREPTOMICINA
EXSUDAT
EXUDADOS
FLORA DEL SUELO
FLORE DU SOL
Fundamental and applied biological sciences. Psychology
GERMINACION
GERMINATION
GRAINE
LYCOPERSICON ESCULENTUM
MANEJO DEL SUELO
MECANISME CHIMIOTACTIQUE
MEDICAMENT
MEDICAMENTOS
Microbiology
MISE EN VALEUR DU SOL
MUTANT
MUTANTES
ORGANISMOS PATOGENOS
Physics, chemistry, biochemistry and biology of agricultural and forest soils
PSEUDOMONAS FLUORESCENS
PSEUDOMONAS PUTIDA
QUIMIOTACTISMO
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
RESISTANCE AUX PRODUITS CHIMIQUES
RESISTENCIA QUIMICA
SEMILLA
Soil science
STREPTOMYCINE
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Summary:We investigated the chemotaxis of fluorescent pseudomonads towards seeds exudates and germinating tomato seeds. Chemotaxis of Pseudomonas putida and P. fluorescens in a capillary tube was more pronounced towards exudates originating from seeds that were germinated in solarized soil than towards comparable exudates from seeds that were germinated in nonsolarized soil. Movement of these bacteria was enhanced also towards a mixture of either amino acids or amino acids and sugars, but not of sugars alone. Chemotaxis of fluorescent pseudomonads from solarized soil through sterile sand towards exudates originating from seeds germinated in solarized soil was more pronounced than movement of these bacteria from nonsolarized soil. Chemotaxis of streptomycin-resistant pseudomonads in soil also was enhanced towards exudates and germinating seeds in solarized soil. We suggest that the improved capacity of fluorescent pseudomonads to move towards attractants and compete for exudates may contribute to their rapid establishment in the rhizosphere and roots of plants in solarized soils
ISSN:0031-949X
1943-7684
DOI:10.1094/Phyto-82-328