A pFBP6::Barnase Construct Resulted in Stigma and Style Ablation and Floral Abscission in Transgenic Tobacco View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2012-10

AUTHORS

Liao Liao, CaiXian Liu, GuoGui Ning, ManZhu Bao

ABSTRACT

The potential for transgene dispersal through pollen, fruit, and seed is an important argument against the release of genetically modified plants. One approach toward addressing the concerns of gene flow from transgenic crops into closely related wild species involves in the use of tissue-specific promoters to engineer male and/or female sterility. In this study, we investigated the potential of Barnase ectopic expression for engineering floral sterility. A 2.6 kb promoter region of floral binding protein 6 (FBP6) from Petunia hybrida was isolated and fused to a reporter gene encoding β-glucuronidase (GUS). The construct was introduced into tobacco plants where GUS staining was detected ubiquitously throughout the various tissues. The expression pattern of FBP6 resembled AG promoters, i.e., weak promoter activity was found in vegetative tissues, and strong activity was found in the various floral organs including the carpels and stigma. Meanwhile,The pFBP6::Barnase construct was then cotransformed into tobacco along with the Barstar gene, encoding an enzymatic inhibitor of Barnase, which was expressed at low but ubiquitous levels. Although cotransformed tobacco plants showed near normal vegetative growth, 74% of transgenic plants exhibited stigma and style ablation, and 98% of flower buds abscised before opening. Further analyses confirmed that stigma and style ablation prevented fertilization of the flower, and abscission of the bud followed rapidly. Thus, this approach has advantages for those ornamental/landscaping species where the pollen and fruit represent pollutants of the urban environment (e.g., platanus and poplar). More... »

PAGES

1196-1203

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11105-012-0424-8

DOI

http://dx.doi.org/10.1007/s11105-012-0424-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1044361586


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This table displays all metadata directly associated to this object as RDF triples.

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