A simple, fast and inexpensive method to assess salt stress tolerance of aerial plant part: Investigations in the mandarin group
2016
Ben Yahmed, Jihene | de Oliveira, Tahise M. | Novillo, Pedro | Quinones, Anna | Forner, Maria-Angeles | Salvador, Alexandra | Froelicher, Yann | Ben Mimoun, Mehdi | Talón, Manuel | Ollitrault, Patrick | Morillon, Raphaël | Instituto Valenciano de Investigaciones Agrarias - Institut Valencià d'Investigacions Agraries - Valencian Institute for agricultural Research (IVIA) | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Amélioration Génétique et Adaptation des Plantes méditerranéennes et Tropicales Corse - Antenne Corse (AGAP-Corse) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA) | Institut National Agronomique de Tunisie (INAT)
International audience
Mostrar más [+] Menos [-]Inglés. For grafted plants, salt stress tolerance of the aerial plant part is poorly documented. Thus, we developed a simple, fast and inexpensive method to identify tolerant genotypes. Twigs of 14 mandarin accessions that we previously analyzed as seedlings were cut in solution to prevent embolism and were then evaluated in salt stress condition for a week. Physiological parameters such as gas exchanges, leaf Cl- and Na+, as well as the presence of H2O2 and the activity of enzymes involved in ROS synthesis and detoxification processes were analyzed. One accession known to be tolerant as rootstock was shown to be sensitive with limited Cl- translocation from the solution to the shoot while sensitive accessions when grown as seedlings presented limited wilting symptoms and accumulated large leaf Cl- content. A model is proposed to explain the different strategies of the plant to cope with high toxic ion content. This method allows separation of the root compartment, where ion exclusion mechanisms may exist and have an impact on the salt stress tolerance of the whole plant. (C) 2015 Elsevier GmbH. All rights reserved.
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