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Tricalcium phosphate solubilizing abilities of Trichoderma spp. in relation to P uptake and growth and yield parameters of chickpea (Cicer arietinum L.)

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Nine isolates of Trichoderma spp. were investigated for their ability to solubilize insoluble phosphate in Pikovskaya's broth and were compared with an efficient phosphate-solubilizing bacterium Bacillus megaterium subsp. phospaticum PB that was used as the reference strain. All 9 Trichoderma isolates were found to solubilize insoluble tricalcium phosphate to various extents. Trichoderma viride (TV 97) (9.03 µg·mL–1), Trichoderma virens (PDBCTVs 12) (9.0 µg·mL–1), and Trichoderma virens (PDBCTVs 13) (8.83 µg·mL–1) solubilized 70% of that solubilzed by the reference strain Bacillus megaterium (12.43 µg·mL–1). Pot culture and field evaluations with Trichoderma harzianum (PDBCTH 10), Trichoderma viride (TV 97), and Trichoderma virens (PDBCTVs 12) using chickpea (Cicer arietinum L.) 'Annegeri-1' as the test plant and rock phosphate as the phosphorus source showed significantly increased P uptake in plants treated with Trichoderma harzianum (PDBCTH 10) followed by Trichoderma virens (PDBCTVs 12) and Trichoderma viride (TV 97). Inoculation of Trichoderma spp. also showed increased growth and yield parameters of chickpea compared with the uninoculated controls under both glasshouse and field conditions.Key words: Cicer arietinum, nutrient uptake, phosphate solubilization, plant yield, Trichoderma spp.

Nous avons évalué la capacité de 9 isolats de Trichoderma spp. à solubiliser le phosphate insoluble dans du bouillon de Pikovskaya en employant la souche PB de Bacillus megaterium subsp. phospaticum en tant que souche de référence capable de solubiliser le phosphate. Les 9 isolats de Trichoderma analysés ont pu solubiliser le phosphate tricalcique à des degrés divers. Trichoderma viride (TV 97) (9,03 µg·mL–1), Trichoderma virens (PDBCTVs 12) (9,0 µg·mL–1) et Trichoderma virens (PDBCTVs 13) (8,83 µg·mL–1) ont pu solubiliser celui-ci à 70 % de la capacité de la souche de référence de Bacillus megaterium (12,43 µg·mL–1). Des cultures en pot et des évaluations sur le terrain de Trichoderma harzianum (PDBCTH 10), Trichoderma viride (TV 97) et Trichoderma virens (PDBCTVs 12) en utilisant le pois chiche (Cicer arietinum L.) 'Annegeri-1' comme plante expérimentale et le phosphate minéral en tant que source de phosphore ont démontré une augmentation significative de l'absorption de P chez les plantes traitées avec Trichoderma harzianum (PDBCTH 10), suivi de Trichoderma virens (PDBCTVs 12) et de Trichoderma viride (TV 97). L'inoculation de Trichoderma spp. a également entraîné une augmentation de la croissance et des paramètres de rendement des pois chiches comparativement aux témoins non inoculés, en serres et dans le champ.Mots clés : Cicer arietinum, absorption de nutriments, solubilisation du phosphate, rendement de plantes, Trichoderma spp.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: March 1, 2005

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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