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Cadmium‐induced changes in the production of siderophores by a plant growth promoting strain of Pseudomonas fulva
Author(s) -
Thiem Dominika,
Złoch Michał,
GadzałaKopciuch Renata,
Szymańska Sonia,
Baum Christel,
Hrynkiewicz Katarzyna
Publication year - 2018
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.201800034
Subject(s) - siderophore , cadmium , phytoremediation , strain (injury) , pseudomonas , chemistry , biology , plant growth , microbiology and biotechnology , food science , botany , heavy metals , biochemistry , bacteria , environmental chemistry , gene , organic chemistry , genetics , anatomy
The impact of increasing Cd 2+ exposure on the quality and quantity of siderophores produced by a plant growth promoting Pseudomonas fulva strain was tested to gain insight into the degree of change. P. fulva was cultured in the increasing concentrations of Cd 2+ (0, 0.5, 1.0, 2.0 mM). The secreted siderophores were separated by HPLC and characterized by UHPLC‐QTOF/MS. In the presence of 2 mM Cd 2+ synthesis of siderophores (hydroxamates, catecholates, phenolates) was mitigated compared to the treatments with lower concentrations of Cd 2+ (0.5 and 1 mM). Increased synthesis of catecholates in 0.5 and 1 mM Cd 2+ and of phenolates in 0.5–2 mM Cd 2+ was revealed compared to the variant without Cd 2+ . Out of seven different hydroxamates, the secretion of ferrioxamine E was significantly decreased in the highest Cd 2+ concentration. Two additional ferrioxamines, X2 and D2, were secreted independent of the presence or absence of Cd 2+ . Exposure to Cd 2+ change the composition of siderophores secreted by P. fulva with selective promotion of catecholates and phenolates at the expense of hydroxamates. Successful adaptation in a Cd‐contaminated soil in the frame of practical applications to promote phytoremediation can be assumed.