The bacterial pathogen Xylella fastidiosa affects the leaf ionome of plant hosts during infection

Xylella fastidiosa is a plant pathogenic bacterium that lives inside the host xylem vessels, where it forms biofilm believed to be responsible for disrupting the passage of water and nutrients. Here, Nicotiana tabacum was infected with X. fastidiosa, and the spatial and temporal changes in the whole...

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Bibliographic Details
Published in:PloS one 2013-05, Vol.8 (5), p.e62945-e62945
Main Authors: De La Fuente, Leonardo, Parker, Jennifer K, Oliver, Jonathan E, Granger, Shea, Brannen, Phillip M, van Santen, Edzard, Cobine, Paul A
Format: Article
Language:English
Subjects:
Bacteria
Bacterial infections
Biofilms
Biology
Calcium
Chemical composition
Disease Progression
Environment, Controlled
Health aspects
Host plants
Infection
Infections
Leaves
Minerals - metabolism
Multivariate Analysis
Nicotiana - metabolism
Nicotiana - microbiology
Nutrients
Nutrition
Pathogens
Physiology
Plant diseases
Plant Diseases - microbiology
Plant Leaves - metabolism
Plant Leaves - microbiology
Plants (botany)
Studies
Time Factors
Trace elements
Trace Elements - metabolism
Xylella - physiology
Xylella fastidiosa
Xylem
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Summary:Xylella fastidiosa is a plant pathogenic bacterium that lives inside the host xylem vessels, where it forms biofilm believed to be responsible for disrupting the passage of water and nutrients. Here, Nicotiana tabacum was infected with X. fastidiosa, and the spatial and temporal changes in the whole-leaf ionome (i.e. the mineral and trace element composition) were measured as the host plant transitioned from healthy to diseased physiological status. The elemental composition of leaves was used as an indicator of the physiological changes in the host at a specific time and relative position during plant development. Bacterial infection was found to cause significant increases in concentrations of calcium prior to the appearance of symptoms and decreases in concentrations of phosphorous after symptoms appeared. Field-collected leaves from multiple varieties of grape, blueberry, and pecan plants grown in different locations over a four-year period in the Southeastern US showed the same alterations in Ca and P. This descriptive ionomics approach characterizes the existence of a mineral element-based response to X. fastidiosa using a model system suitable for further manipulation to uncover additional details of the role of mineral elements during plant-pathogen interactions. This is the first report on the dynamics of changes in the ionome of the host plant throughout the process of infection by a pathogen.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0062945