title: Quantitative analysis of proteome extracted from barley crowns grown under different drought conditions.
abstract: Barley cultivar Amulet was used to study the quantitative proteome changes through different drought conditions utilizing two-dimensional difference gel electrophoresis (2D-DIGE). Plants were cultivated for 10 days under different drought conditions. To obtain control and differentially drought-treated plants, the soil water content was kept at 65, 35, and 30% of soil water capacity (SWC), respectively. Osmotic potential, water saturation deficit, (13)C discrimination, and dehydrin accumulation were monitored during sampling of the crowns for proteome analysis. Analysis of the 2D-DIGE gels revealed 105 differentially abundant spots; most were differentially abundant between the controls and drought-treated plants, and 25 spots displayed changes between both drought conditions. Seventy-six protein spots were successfully identified by tandem mass spectrometry. The most frequent functional categories of the identified proteins can be put into the groups of: stress-associated proteins, amino acid metabolism, carbohydrate metabolism, as well as DNA and RNA regulation and processing. Their possible role in the response of barley to drought stress is discussed. Our study has shown that under drought conditions barley cv. Amulet decreased its growth and developmental rates, displayed a shift from aerobic to anaerobic metabolism, and exhibited increased levels of several protective proteins. Comparison of the two drought treatments revealed plant acclimation to milder drought (35% SWC); but plant damage under more severe drought treatment (30% SWC). The results obtained revealed that cv. Amulet is sensitive to drought stress. Additionally, four spots revealing a continuous and significant increase with decreasing SWC (UDP-glucose 6-dehydrogenase, glutathione peroxidase, and two non-identified) could be good candidates for testing of their protein phenotyping capacity together with proteins that were significantly distinguished in both drought treatments.
authors.affiliation: Division of Crop Genetics and Breeding, Plant Stress Biology and Biotechnology, Crop Research Institute Prague, Czech Republic.
authors.forename: Pavel
authors.initials: P
authors.lastname: Vítámvás
authors.affiliation: Division of Crop Genetics and Breeding, Plant Stress Biology and Biotechnology, Crop Research Institute Prague, Czech Republic.
authors.forename: Milan O
authors.initials: MO
authors.lastname: Urban
authors.affiliation: Division of Crop Genetics and Breeding, Plant Stress Biology and Biotechnology, Crop Research Institute Prague, Czech Republic.
authors.forename: Zbynek
authors.initials: Z
authors.lastname: Škodáček
authors.affiliation: Division of Crop Genetics and Breeding, Plant Stress Biology and Biotechnology, Crop Research Institute Prague, Czech Republic.
authors.forename: Klára
authors.initials: K
authors.lastname: Kosová
authors.affiliation: Division of Crop Genetics and Breeding, Plant Stress Biology and Biotechnology, Crop Research Institute Prague, Czech Republic.
authors.forename: Iva
authors.initials: I
authors.lastname: Pitelková
authors.affiliation: Division of Crop Genetics and Breeding, Plant Stress Biology and Biotechnology, Crop Research Institute Prague, Czech Republic ; Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague Prague, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Vítámvás
authors.affiliation: Department of Environmental Research and Innovation, Luxembourg Institute of Science and Technology Belvaux, Luxembourg.
authors.forename: Jenny
authors.initials: J
authors.lastname: Renaut
authors.affiliation: Division of Crop Genetics and Breeding, Plant Stress Biology and Biotechnology, Crop Research Institute Prague, Czech Republic.
authors.forename: Ilja T
authors.initials: IT
authors.lastname: Prášil
keywords: Hordeum vulgare; crown; drought; phenotyping candidate; proteomics