Aleurone and subaleurone morphology in native Australian wild cereal relatives

Shapter, F. M., Dawes, M. P., Lee, L. S. and Henry, R. J. (2009) Aleurone and subaleurone morphology in native Australian wild cereal relatives. Australian Journal of Botany, 57 8: 688-696.


Author Shapter, F. M.
Dawes, M. P.
Lee, L. S.
Henry, R. J.
Title Aleurone and subaleurone morphology in native Australian wild cereal relatives
Journal name Australian Journal of Botany  (ERA 2012 Listed)    (ERA 2010 Rank B)   Check publisher's open access policy
Publication date 2009
Sub-type Article
DOI 10.1071/BT07086
Volume number 57
Issue number 8
ISSN 0067-1924; 1444-9862
Start page 688
End page 696
Total pages 9
Place of publication Collingwood, VIC, Australia
Publisher C S I R O Publishing
Language eng
Formatted abstract The pericarp and aleurone layer of cereal grains are associated with the accumulation of anti-nutritional factors, vitamins, high-value proteins and trace elements. Variations in these tissues may be associated with important differences in the nutritional and functional value of cereals as human or animal feeds. Wild crop relatives (WCR) have been successfully utilised in breeding programs to improve agronomic traits such as dwarfism and pest and disease resistance. Australia’s undomesticated grass species (Poaceae) provide a unique and genetically diverse array of WCRs and therefore the grains of 17 Australian WCRs were examined by scanning electron microscopy (SEM). Aleurone of each WCR was compared with that of its nearest domesticated cereal relative, with little significant morphological variation observed to this structure. A novel subaleurone morphology was observed in the Sorghum WCRs which had the appearance of being a very dense protein matrix only sparsely embedded with small starch granules or completely lacking starch granules. Histochemical analysis of a subsample of the specimens confirmed that the described morphology was lacking starch granules and had a proteinaceous matrix. Such morphological variations within Australian wild crop relatives of commercial cereals may provide novel sources of genetic diversity for future grain improvement programs.
Keyword Phytic Acid-phosphorus
Bicolor L. Moench
Protein Digestibility
Sorghum
Endosperm
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article
Collections: Queensland Alliance for Agriculture and Food Innovation
ERA 2012 Admin Only
 
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Created: Mon, 07 Mar 2011, 16:13:59 EST