ArticlePlant molecular biology1995
Expression of Agrobacterium rhizogenes auxin biosynthesis genes in transgenic tobacco plants.
Article in Plant molecular biology, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 26 citations in OpenAlex.
- The hormone regulatory mechanism underlying parthenocarpic fruit formation in tomato.Frontiers in plant science · 2024Review
- A highly efficient auxin-producing bacterial strain and its effect on plant growth.Journal, genetic engineering & biotechnology · 2021Article
- Identification and characterization of the EXPA7, EXPA18 and EXT10 genes in Turbinicarpus lophophoroides (Werderm.) Buxb. & Backeb; and their expression analysis in the root under abiotic stress.Molecular biology reports · 2021Article
- Disease resistance or growth: the role of plant hormones in balancing immune responses and fitness costs.Frontiers in plant science · 2013Article
- A putative rolB gene homologue of the Agrobacterium rhizogenes TR-DNA has different morphogenetic activity in tobacco than rolB.Plant molecular biology · 1998Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plant oncogenes aux1 and aux2 carried by the TR-DNA of Agrobacterium rhizogenes strain A4 encode two enzymes involved in the auxin biosynthesis pathway in transformed plant cells. The short divergent promoter region between the two aux-coding sequences contains the main regulatory elements. This region was fused to the uidA reporter gene and introduced into Nicotiana tabacum in order to investigate the regulation and the tissue specificity of these genes. Neither wound nor hormone induction could be detected on transgenic leaf discs. However, phytohormone concentration and auxin/cytokinin balance controlled the expression of the chimaeric genes in transgenic protoplasts. The expression was localised in apical meristems, root tip meristems, lateral root primordia, in cells derived from transgenic protoplasts and in transgenic calli. Histological analysis showed that the expression was located in cells reactivated by in vitro culture. Experiments using cell-cycle inhibitors such as hydroxyurea or aphidicolin on transgenic protoplast cultures highly decreased the beta-glucuronidase activity of the chimaeric genes. These results as well as the histological approach suggest a correlation between expression of the aux1 and aux2 genes and cell division.
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