Drought-proofing barley (Hordeum vulgare) and its impact on grain quality: A review

Abstract

Barley starch research is currently focused on the biosynthesis (enzymatic pathways), structure and the properties of barley grown under optimal conditions. With only limited information available on the effects of abiotic stress (drought) on starch structure, the need arises to determine the effects of genetic expression, inferring drought tolerance and its impact on starch biosynthesis and structure under terminal drought stress. Using size-exclusion chromatography for the first time can bring an understanding of how starch molecular structure is influenced by drought tolerance trait expression; this has the potential to improve our current knowledge of starch biosynthesis, structure and properties. This understanding may aid plant breeders in producing varieties that are drought-tolerant whilst maintaining the desired starch quality characteristics required by industry. In this review, starch hierarchical structure and molecular structural characterization methods are summarized. This is followed by an overview of our current knowledge of abiotic stress, stress tolerance and its impact on grain quality.

An Improved Syringe Agroinfiltration Protocol to Enhance Transformation Efficiency by Combinative Use of 5-Azacytidine, Ascorbate Acid and Tween-20

“…The result showed that O 2− and H 2 O 2 were both reduced, accompanied with the increasing of ASC level (Figure 2C), which reflects the protective effect of ASC against oxidative damage caused by excess ROS accumulation. Abiotic stress will induce the breakdown of chlorophyll, and therefore chlorophyll content can be used as an indicator of plant damage [24]. We further determined the chlorophyll contents in the infiltrated tobacco leaves.…”

Review: Amylopectin synthesis and hydrolysis – Understanding isoamylase and limit dextrinase and their impact on starch structure on barley ( Hordeum vulgare ) quality

“…Barley is grown for feed, food or used in industrial applications such as malting (Ullrich 2011, Gous, Gilbert et al 2015. Complex genetic, physiochemical properties, and their associated interactions have resulted in continued attempts to improve barley grain quality (Gous, Gilbert et al 2015). A number of these quality traits directly determine potential end use.…”

4th Conference of Cereal Biotechnology and Breeding (CBB4), November 6–9, 2017, Budapest, Hungary – Book of Abstracts

“…Barley (Hordeum vulgare L.) is widely used as food or feed for animals. For malting and brewing purposes specific quality parameters protein content is very important (Gous et al 2015), which is determined by the agronomic practise and by the enviroment. Excessive rates of nitrogen fertilization can increase protein levels.…”