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  • Title: Role of iron and the TonB system in colonization of corn seeds and roots by Pseudomonas putida KT2440.
    Author: Molina MA, Godoy P, Ramos-González MI, Muñoz N, Ramos JL, Espinosa-Urgel M.
    Journal: Environ Microbiol; 2005 Mar; 7(3):443-9. PubMed ID: 15683404.
    Abstract:
    Iron, which is abundant in corn (Zea mays L.) seeds, plays an important role in the initial establishment of Pseudomonas putida KT2440 populations on seeds. Sequestration of seed-borne iron by chelators decreases the capacity of KT2440 to initiate attachment to corn seeds. The importance of iron for this plant-bacteria interaction is further supported by the fact that mutations in the TonB system, which is key for iron uptake, result in reduced seed colonization. TonB is also a primary determinant of the fitness of P. putida in the rhizosphere, as a deletion mutant shows a clear competitive disadvantage during colonization of corn roots.
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