Summary: Arabidopsis local resistance to Botrytis cinerea involves
salicylic acid and camalexin and requires EDS4 and PAD2,
but not SID2, EDS5 or PAD4
, Julia M. Plotnikova1
, Giulia De Lorenzo2
and Frederick M. Ausubel1,├
Department of Genetics, Harvard Medical School, and Department of Molecular Biology, Massachusetts General
Hospital, Boston, MA 02114, USA, and
Dipartimento di Biologia Vegetale, Universita┴ di Roma `La Sapienza', Piazzale Aldo Moro 5, 00185 Rome, Italy
Received 20 December 2002; revised 10 April 2003; accepted 14 April 2003.
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Salicylic acid (SA) is an important regulator of plant defense responses, and a variety of Arabidopsis
mutants impaired in resistance against bacterial and fungal pathogens show defects in SA accumulation,
perception, or signal transduction. Nevertheless, the role of SA-dependent defense responses against
necrotrophic fungi is currently unclear. We determined the susceptibility of a set of previously identi«ed