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Endophytic Bacteria Expressing β-glucuronidase Cause False Positives in Transformation of Dioscorea Species

Tör, M and Mantell, S.H. and Ainsworth, C.C. (1992) Endophytic Bacteria Expressing β-glucuronidase Cause False Positives in Transformation of Dioscorea Species. Plant Cell Reports, 11 (9). pp. 452-456.

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Abstract

False positive transformants obtained during plant transformation experiments on species of the monocotyledonous genus Dioscorea (yam) are described. The false positive results were found to be due to endophytic bacteria which exist within aseptically micropropagated shoot cultures and which express -glucuronidase (GUS). The bacteria were isolated and identified as two species of Curtobacterium. The expression of GUS in these organisms was found to be induced by a variety of glucuronide substrates. The induction of GUS activity in the bacteria can be inhibited by chloramphenicol, tetracycline, ticarcillin and sodium azide. Implications of these results for use of the gus gene in plant transformation work are discussed.

Item Type: Article
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Uncontrolled Keywords: Glucuronidase, Dioscorea, endophytic bacteria, false positive transformants
Subjects: Q Science > QK Botany
Q Science > QH Natural history > QH426 Genetics
Q Science > QH Natural history > QH301 Biology
Q Science > QR Microbiology
Divisions: Academic Departments > Institute of Science and the Environment
Research Centres > National Pollen and Aerobiology Research Unit
Depositing User: Janet Davidson
Date Deposited: 19 Jan 2011 20:07
Last Modified: 19 Jan 2011 20:07
URI: https://eprints.worc.ac.uk/id/eprint/1181

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