A - Papers appearing in refereed journals
Zhang, Y., Darlington, H., Jones, H. D., Halford, N. G., Napier, J. A., Davey, M. R., Lazzeri, P. A. and Shewry, P. R. 2003. Expression of the gamma-zein protein of maize in seeds of transgenic barley: effects on grain composition and properties. Theoretical and Applied Genetics. 106 (6), pp. 1139-1146.
|Authors||Zhang, Y., Darlington, H., Jones, H. D., Halford, N. G., Napier, J. A., Davey, M. R., Lazzeri, P. A. and Shewry, P. R.|
A cDNA clone encoding the gamma-zein protein of maize was expressed in developing grain of barley using the starchy endosperm cell-specific promoter from the wheat Glu-1D-1 (HMW subunit 1Dx5) gene. Seven transgenic lines were recovered from 226 bombarded immature embryos, of which two were sterile and four tetraploid, while five were shown to express the gamma-zein protein based on western blotting. Southern blot analysis showed the presence of between about three and twelve transgene insertions. Detailed comparative studies of five null and five homozygous transformed sub-lines from transgenic line A showed that gamma-zein accounted for over 4% of the total prolamin fraction, corresponding to about 1.9% of the total grain N. Comparison of the proteins present in the gel protein fraction demonstrated that the gamma-zein was incorporated into polymers, as in maize. However, there was no effect on grain hardness measured using the Perten Single Kernel Characterisation System or on the vitreousness measured by visual inspection. This contrasts with the situation in maize where a clear association with vitreousness has been reported.
|Keywords||Barley; Transgenic plants; Grain texture; Grain vitreousness; g-Zein|
|Year of Publication||2003|
|Journal||Theoretical and Applied Genetics|
|Journal citation||106 (6), pp. 1139-1146|
|Digital Object Identifier (DOI)||doi:10.1007/s00122-002-1162-3|
|Open access||Published as non-open access|
|Funder project or code||415|
|Structural and protein engineering studies of novel cereal and oilseed proteins with functional properties or biological activity|
|Online||28 Feb 2003|
|Publication process dates|
|Accepted||06 Aug 2002|
|Copyright license||Publisher copyright|