Thigmomorphogenesis in Solanum lycopersicum: morphological and biochemical responses in stem after mechanical stimulation
2010
Saidi , Issam (Faculté des Sciences de Tunis, Tunis(Tunisie). Laboratoire de Physiologie et Biotechnologie Végétales, Département de Biologie) | Ammar , Saïda (Faculté des Sciences de Tunis, Tunis(Tunisie). Laboratoire de Physiologie et Biotechnologie Végétales, Département de Biologie) | Demont-Caulet , Nathalie (INRA , Versailles (France). UMR 1318 Institut Jean-Pierre BOURGIN) | Thevenin , Johanne (INRA , Versailles (France). UMR 1318 Institut Jean-Pierre BOURGIN) | Lapierre , Catherine (INRA , Thiverval-Grignon (France). UMR 0206 Unité mixte de recherche de chimie biologique) | Bouzid , Sadok (Faculté des Sciences de Tunis, Tunis(Tunisie). 2Laboratoire de Physiologie et Biotechnologie Végétales, Département de Biologie) | Jouanin , Lise (INRA , Versailles (France). UMR 1318 Institut Jean-Pierre BOURGIN)
The activation of the phenylpropanoid pathway in plants by environmental stimuli is one of the most universal biochemical stress responses known. In tomato plant, rubbing applied to a young internode inhibit elongation of the rubbed internode and his neighboring one. These morphological changes were correlated with an increase in lignification enzyme activities, phenylalanine ammonia-lyase (PAL), cinnamyl alcohol dehydrogenase (CAD) and peroxidases (POD), 24 hours after rubbing of the forth internode. Furthermore, a decrease in indole-3-acetic acid (IAA) content was detected in the rubbed internode and the upper one. Taken together, our results suggest that decrease in rubbed internode length is a consequence of IAA oxidation, increases in enzyme activities (PAL, CAD and POD), and cell wall rigidification associated with induction of lignification process.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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تم تزويد هذا السجل من قبل Institut national de la recherche agronomique