A Switch from Latent to Typical Infection during -Tobacco Interactions: Predicted and True Molecular Players.

Phytopathogenic microorganisms, being able to cause plant diseases, usually interact with hosts asymptomatically, resulting in the development of latent infections. Knowledge of the mechanisms that trigger a switch from latent to typical, symptomatic infection is of great importance from the perspectives of both fundamental science and disease management. No studies to date have compared, at the systemic molecular level, the physiological portraits of plants when different infection types (typical and latent) are developed.

The Role of Intercellular Signaling in the Regulation of Bacterial Adaptive Proliferation.

Bacterial adaptation is regulated at the population level with the involvement of intercellular communication (quorum sensing). When the population density is insufficient for adaptation under starvation, bacteria can adjust it to a quorum level through cell divisions at the expense of endogenous resources. This phenomenon has been described for the phytopathogenic bacterium (), and it is called, in our study, adaptive proliferation.

The Role of Exopolysaccharides in Plant-Pathogen Interactions.

The phytopathogenic bacterium (), one of the members of the soft rot , forms biofilm-like structures known as bacterial emboli when colonizing the primary xylem vessels of the host plants. The initial extracellular matrix of the bacterial emboli is composed of the host plant's pectic polysaccharides, which are gradually substituted by the -produced exopolysaccharides ( EPS) as the bacterial emboli "mature". No information about the properties of EPS and their possible roles in -plant interactions has so far been obtained.

The Knockout of Enterobactin-Related Gene in Results in Reduced Stress Resistance and Virulence towards the Primed Plants.

Siderophores produced by microorganisms to scavenge iron from the environment have been shown to contribute to virulence and/or stress resistance of some plant pathogenic bacteria. Phytopathogenic bacteria of genus possess genes for the synthesis of siderophore enterobactin, which role in plant-pathogen interactions has not been elucidated. In the present study we characterized the phenotype of the mutant strain of deficient for the enterobactin-biosynthetic gene .

The Line of the Unit Compressibility Factor (Zeno-Line) for Crystal States.

We study the behavior of the line of the unit compressibility factor (Zeno-line) in crystalline states. We used the Lennard-Jones system, experimental -- data for a number of substances, and the Debye model. We found that, contrary to the case of the liquid states, the Zeno-line in a crystal is not a straight line at the density-temperature plane.