INVESTIGADORES
GUDESBLAT Gustavo Eduardo
artículos
Título:
Stomata and pathogens: warfare at the gates
Autor/es:
GUSTAVO E. GUDESBLAT; PABLO S. TORRES; ADRIÁN A. VOJNOV
Revista:
Plant Signaling and behavior
Editorial:
Landes Biosciences
Referencias:
Lugar: Austin; Año: 2009 vol. 4 p. 1114 - 1116
ISSN:
1559-2316
Resumen:
Bacteria and fungi are capable of triggering stomatal closure through
pathogen-associated molecular patterns (PAMPs), which prevents
penetration through these pores. Therefore, the stomata can be
considered part of the plant innate immune response. Some pathogens have
evolved mechanisms to evade stomatal defense. The bacterial pathogen Xanthomonas
campestris pv. campestris (Xcc), which infects plants of
the Brassicaceae family mainly through hydathodes, has also been
reported to infect plants through stomata. A recent report shows that
penetration of Xcc in Arabidopsis leaves through stomata depends on a
secreted small molecule whose synthesis is under control of the rpf/diffusible
signal factor (DSF) cell-to-cell signaling system, which also controls
genes involved in biofilm formation and pathogenesis. The same reports
shows that Arabidopsis ROS- and PAMP-activated MAP kinase 3 (MPK3) is
essential for stomatal innate response. Other recent and past findings
about modulation of stomatal behaviour by pathogens are also discussed.
In all, these findings support the idea that PAMP-triggered stomatal
closure might be a more effective and widespread barrier against
phytopathogens than previously thought, which has in turn led to the
evolution in pathogens of several mechanisms to evade stomatal defense.