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Transformation of cereals via Agrobacterium and the pollen pathway: a critical assessment
Author(s) -
Langridge Peter,
Brettschneider Reinhold,
Lazzeri Paul,
Lörz Horst
Publication year - 1992
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/j.1365-313x.1992.00631.x
Subject(s) - agrobacterium , biology , transformation (genetics) , genetically modified crops , genomic dna , genome , dna , transgene , genetics , gene , botany
Summary It has been proposed that transgenic plants of cereals can be generated by inoculating florets with Agrobacterium at or near anthesis. This procedure is shown to lead to the production of embryos of wheat and barley with enhanced resistance to antibiotic selection. It has also been possible to recover plants of wheat, barley and maize that gave positive hybridization signals with probes produced from within the T‐DNA of the Agrobacterium vector. However, no evidence was found for transmission of the bands detected by hybridization in the progeny of the putative transgenic plants nor could enzyme activity associated with the resistance genes be found in plant extracts. Furthermore, undigested genomic DNA from the plants that were positive when probed with the T‐DNA, showed hybridization to bands smaller than the genomic DNA. It is suggested that the apparent transformation is an artifact of the procedure and does not reflect transformation of the plant nuclear genome.

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