Abstract
Wheat cv. H45 was grown under ambient CO2 concentration and Free Air CO2 Enrichment (FACE; eCO2, similar to 550 mu mol CO2 mol(-1)). The effect of FACE on wheat grain proteome and associated changes in the flour rheological properties was investigated. A comparative proteomic analysis was performed using 2-D-DIGE followed by MALDI/TOF-MS. Total grain protein concentration was decreased by 9\% at eCO2. Relative abundance of three high molecular weight glutenin sub units (HMW-GS) were decreased at eCO2. In contrast, relative abundance of serpins Z1C and 1-Cys peroxiredoxin was increased at eCO2. Elevated CO2 also decreased the bread volume (by 11\%) and dough strength (by 7\%) while increased mixing time. However, dough extensibility and dough stability were unchanged at elevated CO2. These findings suggest that eCO2 has a major impact on gluten protein concentration which is associated lower bread quality at eCO2. (C) 2014 Elsevier Ltd. All rights reserved.
Users
Please
log in to take part in the discussion (add own reviews or comments).