אסיף מאגר המחקר החקלאי

Promotion of nod gene inducers and nodulation in common bean (Phaseolus vulgaris) roots inoculated with Azospirillum brasilense Cd

Year:

1996

Source of publication :

Authors :

Volume :

62

Co-Authors:

Burdman, S., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel, Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Volpin, H., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Kigel, J., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Kapulnik, Y., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Okon, Y., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel

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Abstract:

Inoculation of phaseolus vulgaris with Azospirillum brasilense Cd promoted root hair formation in seedling roots and significantly increased total and upper nodule numbers at different concentrations of Rhizobium inoculum. In experiments carried out in a hydroponic system, A. brasilense caused an increase in the secretion of nod gene-inducing flavonoids, as was observed by nod gene induction assays of root exudates fractionated by high- performance liquid chromatography. Possible mechanisms involved in the influence of A. brasilense on this symbiotic system are discussed.

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