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Salicylic acid and its location in response to biotic and abiotic stress
Author(s) -
Fragnière Cindy,
Serrano Mario,
Abou-Mansour Eliane,
Métraux Jean-Pierre,
L'Haridon Floriane
Publication year - 2011
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2011.04.039
Subject(s) - nicotiana benthamiana , salicylic acid , arabidopsis thaliana , chloroplast , phenylpropanoid , biology , abiotic stress , abiotic component , biotic stress , atp synthase , botany , biochemistry , gene , biosynthesis , paleontology , mutant
Salicylic acid (SA) is an important signal involved in the activation of plant defence responses against abiotic and biotic stress. SA may derive from the phenylpropanoid pathway or via isochorismate synthase as demonstrated in Nicotiana benthamiana , tomato and Arabidopsis thaliana . The phenylpropanoid pathway as well as isochorismate synthase are localized in the chloroplasts but it remains unknown if the end product SA is in the same organelle. We have studied the localization of SA in A. thaliana using the salicylate hydroxylase ( NahG ) gene expressed with a chloroplast targeting sequence. Plants expressing NahG in the chloroplasts are unable to accumulate SA induced after pathogen or UV exposure. Our data infer that SA is initially located in the chloroplasts.