The role of fungicides in the physiology of higher plants: Implications for defense responses |
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Authors: | Pablo C Garcia Rosa M Rivero Juan M Ruiz Luis Romero |
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Institution: | (1) Department of Plant Biology Faculty of Sciences, University of Granada, 18071 Granada, Spain |
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Abstract: | Plants react to pathogen attack through a variety of active and passive defense mechanisms primarily related to the metabolism
of phenolic compounds and oxidative metabolism. Thus the activation of defensive reactions is associated with the increased
expression of a great number of genes that encode enzymes involved in the biosynthetic pathway of phenolic compounds. Similarly,
the activation of oxidative metabolism precedes the expression of defense genes during plant-pathogen interactions, so both
metabolic processes must exert a major function in directing the mechanisms to resist disease. Similarly, it has been suggested
that certain fungicides used to mitigate or prevent pathogen attack may be involved in activating certain defensive responses
of plants. However, the fact that such substances may influence the key steps of the phenolic and oxidative processes has
scarcely been studied. Our work confirms the results proposed by other authors, who suggest that certain wide-spectrum fungicides,
in addition to their antibiotic action against pathogens, may be involved in the activation of some defensive responses of
plants. |
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