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A novel late embryogenesis abundant protein and peroxidase associated with black point in barley grains. | LitMetric

A novel late embryogenesis abundant protein and peroxidase associated with black point in barley grains.

Proteomics

School of Agriculture, Food & Wine, The University of Adelaide, Waite Campus, Glen Osmond, South Australia, Australia.

Published: October 2007

AI Article Synopsis

Article Abstract

Black point of barley grain is a disorder characterised by a brown-black discolouration at the embryo end of the grain. Black point is undesirable to the malting industry and results in significant economic loss annually. To identify proteins associated with barley black point we utilised a proteomic approach with 2-DE to compare proteins from whole grain samples of black pointed and healthy grain. From this comparison two condition-specific proteins were identified: a novel 75 kDa late embryogenesis abundant (LEA) protein and a barley grain peroxidase 1 (BP1) that were specifically more abundant in healthy grain and black pointed grain, respectively. Although LEA protein was less abundant in black pointed grain, LEA gene expression was greater suggesting protein degradation had possibly occurred in black pointed grain. Similarly, the increase in BP1 in black pointed grain could not be explained by gene expression. Western blot analysis also revealed that the identified LEA protein is biotinylated in vivo. The role that each of these proteins might have in black point development is discussed.

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Source
http://dx.doi.org/10.1002/pmic.200700456DOI Listing

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