E-MEXP-276 - Transcription profiling of drought treated P.euphratica
Submitted on 27 February 2005, released on 1 March 2005, last updated on 2 May 2014
Plantlets of P. euphratica (clone B2) were obtained by in vitro culture. After ex vitro acclimation, they were transferred and acclimated to greenhouse conditions and transplanted into 7.5L-pot filled with peat-sand mix (50/50 V/V) and were pruned (following some leaf shedding due to transplantation shock). In the greenhouse, climate conditions depended on outside weather but temperature was regulated in order to remain between 15 and 30°C. A moderate, increasing drought stress was applied and controlled for 6 weeks. Soil volumetric water content was measured one to two times a day depending on the intensity of the stress (TDR and weighting). Plantlets were progressively brought to 5 stress levels [soil volumetric water content]: 10% (harvest 1, 11 days from start of experiment), 7.5% (harvest 2, 16 days from start of experiment), 5% (harvest 3, 22 days from start of experiment), 4% (harvest 4, 26-32 days from start of experiment) and back to fully available water (harvest 5, 10 days after fully watering of the trees; 36 days from start of experiment). Leaves and roots (including control and stressed trees) were harvested for each stress level. At harvest 1-3, samples from five trees were harvested. At harvest 4, samples from two trees were harvested at each of day 26, 29 and 32. At harvest 5, samples were harvested from two control trees and four re-watered trees.
For the array experiment: leaf or root samples were pooled before RNA isolation to give three repeats by dividing the five samples 2+2+1. For harvest 4; samples were pooled from each of the two trees sampled at day 26, 29 and 32 to give three biological repeats. In harvest 5 samples were pooled 2+2 to give two biological repeats. Each array experiment was done with a dye swap to give 28 hybridizations for the leaf and 28 hybridizations for the root experiment.
transcription profiling by array, stimulus or stress
Gradual Soil Water Depletion Results in Reversible Changes of Gene Expression, Protein Profiles, Ecophysiology, and Growth Performance in Populus euphratica, a Poplar Growing in Arid Regions. Marie-Béatrice Bogeat-Triboulot, Mikael Brosché, Jenny Renaut, Laurent Jouve, Didier Le Thiec, Payam Fayyaz, Basia Vinocur, Erwin Witters, Kris Laukens, Thomas Teichmann, Arie Altman, Jean-François Hausman, Andrea Polle, Jaakko Kangasjärvi and Erwin Dreyer. Plant Physiol :876-892 (2007), Europe PMC 17158588