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GrainGenes Reference Report: PRT-21-467

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Reference	PRT-21-467
Title	Expression of green fluorescent protein and its inheritance in transgenic oat plants generated from shoot meristematic cultures
Journal	Plant Cell Reports
Year	2003
Volume	21
Pages	467-474
Author	Cho MJ Choi HW Okamoto D Zhang S Lemaux PG
Abstract	Summary: The expression of green fluorescent protein (GFP) and its inheritance were studied in transgenic oat (Avena sativa L.) plants transformed with a synthetic green fluorescent protein gene [sgfp(S65T)] driven by a rice actin promoter. In vitro shoot meristematic cultures (SMCs) induced from shoot apices of germinating mature seeds of a commercial oat cultivar, Garry, were used as a transformation target. Proliferating SMCs were bombarded with a mixture of plasmids containing the sgfp(S65T) gene and one of three selectable marker genes, phosphinothricin acetyltransferase (bar), hygromycin phosphotransferase (hpt) and neomycin phosphotransferase (nptII). Cultures were selected with bialaphos, hygromycin B and geneticin (G418), respectively, to identify transgenic tissues. From 289 individual explants bombarded with the sgfp(S65T) gene and one of the three selectable marker genes, 23 independent transgenic events were obtained, giving a 8.0% transformation frequency. All 23 transgenic events were regenerable, and 64% produced fertile plants. Strong GFP expression driven by the rice actin promoter was observed in a variety of tissues of the T0 plants and their progeny in 13 out of 23 independent transgenic lines. Stable GFP expression was observed in T2 progeny from five independent GFP-expressing lines tested, and homozygous plants from two lines were obtained. Transgene silencing was observed in T0 plants and their progeny of some transgenic lines
Keyword	[ Hide all but 1 of 39 ] actin avena avena sativa bar culture explants fertile gene gfp green fluorescent protein high frequency highly regenerative tissues hordeum vulgare hygromycin in vitro inheritance maize marker marker genes microprojectile bombardment oat oat (avena sativa) plasmid progeny promoter protein rice selectable marker selectable marker gene shoot shoot meristematic cultures stable transformation tissue transformation transformation frequency transgene transgene expression and inheritance transgene silencing transgenic

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