Regulation of phytotoxin production in Pseudomonas syringae pv. tabaci (original) (raw)

1991

Abstract

Pseudomonas syringae pv. tabaci, a pathogen of tobacco, is capable of colonizing the rhizosphere of many plants. This pathogen excretes tabtoxinine-β-lactam (TβL), an active site directed, irreversible inhibitor of glutamine synthetase. TβL is produced in planta, in the rhizosphere, and under certain culture conditions. However, the factors which regulated TβL production in these environments are unknown. As a first step in characterizing TβL synthesis by P. syringae pv. tabaci, the authors have determined the effects of root exudates and various nutrients on production of TβL by P. syringae pv. tabaci PT113.

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