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Action of the microorganisms of the rhizosphere on the growth of wheat II Isolations and identification of the bacteria producing phytohormones

, : Action of the microorganisms of the rhizosphere on the growth of wheat II Isolations and identification of the bacteria producing phytohormones. Ann Inst Pasteur 105(2): 303-314

During the tillering period, the rhizosphere of wheat contains bacterial strains (19.9%) producing phytohormones. To demonstrate these phytohormones in culture filtrates, 2 conventional tests were used: the linear growth of the wheat coleoptile and the elongation of dwarf pea plantlets. In the second case the bacterial activity is very poor and rapidly disappears in the course of subcultures. Identification shows that the active bacteria are mainly gram-negative rods (Pseudomonas and Alcaligenes).


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