From the culture of Pseudomonas sp. 267 obtained from the rhizosphere of Triticum pseudobactin and pseudobactin A were isolated. These two compounds are the pyoverdins typical for Pseudomonas fluorescens, which establishes the identity of the strain. In addition, two novel compounds were found in the cultural broth, viz two 7-sulfonic acid derivatives of pseudobactin A. Their structure elucidation and biogenetic implications will be presented.
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Budzikiewicz et al. (1998) studied this question.
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