The cuticle: not only a barrier for plant defence
2008
The cuticle is a physical barrier that prevents water loss and
protects against irradiation, xenobiotics and pathogens. This
classic textbook statement has recently been revisited and several
observations were made showing that this dogma falls short of
being universally true. Both transgenic Arabidopsis thaliana lines
expressing cell wall-targeted fungal cutinase (so-called CUTE
plants) or lipase as well as several A. thaliana mutants with altered
cuticular structure remained free of symptoms after an inoculation
with Botrytis cinerea. The alterations in cuticular structure lead to
the release of fungitoxic substances and changes in gene expression
that form a multifactorial defence response. Several models to
explain this syndrome are discussed.
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