The present study demonstrates Agrobacterium tumefaciens-mediated stable genetic transformation of two species of poplar - Populus angustifolia and Populus balsamifera. The binary vector pCAMBIA-Npro-long-Luc containing the luciferase reporter gene was used to transform stem internode and axillary bud explants. Putative transformants were regenerated on selection-free medium using our previousl...

Arabinogalactan-proteins (AGPs) are a family of complex proteoglycans widely distributed in plants. The Arabidopsis rat1 mutant, previously characterized as resistant to Agrobacterium tumefaciens root transformation, is due to a mutation in the gene for the Lys-rich AGP, AtAGP17. We show that the phenotype of rat1 correlates with down-regulation of AGP17 in the root as a result of a T-DNA inser...

The common soil bacteria Agrobacterium tumefaciens and Agrobacterium rhizogenes are unique genetic pathogens capable of fundamentally redirecting plant metabolism in order to generate macroscopic tissue masses (crown galls and hairy roots, respectively) which support the growth of large populations of Agrobacteria. Central to pathogenesis is the horizontal transfer of a suite of oncogenes from ...

31 The flagellotropic phage 7-7-1 specifically adsorbs to Agrobacterium sp. H13-3 (formerly 32 Rhizobium lupini H13-3) flagella for efficient host infection. The Agrobacterium sp. H13-3 33 flagellum is complex and consists of three flagellin proteins, the primary flagellin FlaA which is 34 essential for motility and the secondary flagellins FlaB and FlaD which have minor functions in 35 motilit...

Although genetic transformation of clonally propagated crops has been widely studied as a tool for crop improvement and as a vital part of the development of functional genomics resources, there has been no report of any existing Agrobacterium-mediated transformation of yam (Dioscorea spp.) with evidence of stable integration of T-DNA. Yam is an important crop in the tropics and subtropics prov...

Aims: The aim of this study was to estimate the efficiency of T-DNA transfer during Agrobacterium-mediated transformation of maize (Zea mays L.) at different temperatures. In addition, the way of T-DNA transfer was studied after application of an Agrobacterium suspension at maize pistil filaments. Study Design: Transgenic maize plants were obtained with an antisense suppressor of the proline de...

Agrobacterium colonizes plant cells via a gene transfer mechanism that results in plant tumorigenesis. Virulence (vi4 genes are transcriptionally activated in the bacteria by plant metabolites released from the wound site. Hence, it is believed that agrobacteria use injuries to facilitate their entrance into the host plant and that the wounded state is required for plant cell competence for Agr...

Agrobacterium tumefaciens causes crown gall disease by transferring oncogenic, single-stranded DNA (T strand), covalently attached to the VirD2 protein, across the bacterial envelope into plant cells where its expression results in tumor formation. The single-stranded DNA binding protein VirE2 is also transferred into the plant cell, though the location at which VirE2 interacts with the T stran...

Phosphate deficiency is characteristic for many natural habitats, resulting in different physiological responses in plants and bacteria including the replacement of phospholipids by glycolipids and other phosphorous-free lipids. The plant pathogenic bacterium Agrobacterium tumefaciens, which is free of glycolipids under full nutrition, harbors an open reading frame (ORF) coding for a processive...

The present study aims to investigate the numerous factors influencing Agrobacterium tumefaciens-mediated genetic transformation of Chinese cabbage (Brassica rapa ssp. pekinensis). Factors affecting transformation efficiency, such as age of explants, Agrobacterium concentration, and effect of acetosyringone, pre-cultivation, infection and co-cultivation time of Agrobacterium were examined. The ...