期刊
ENVIRONMENTAL MICROBIOLOGY
卷 7, 期 3, 页码 443-449出版社
WILEY
DOI: 10.1111/j.1462-2920.2005.00720.x
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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 determintant 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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