These differences include their infectivity in host cells, virulence and pathogenesis in animal models, drug sensitivity, tissue tropism, morphology, and antigenic composition.
The molecular basis for receptorbinding specificity and the role this plays in viral tropism and host range is not as clear-cut as is often portrayed.
These vectors can efficiently transduce dividing and nondividing cells and have broad tissue tropism.
The virus also has gastrointestinal tropism in various bird species.
The virus exhibits multiple cell tropisms, infecting peripheral blood mononuclear cells and skin cells before establishing latency in sensory neurons.
The transmission route could even be linked to host specificity and virulence or tissue tropism.
The incentives for these tropisms, again, are too complex to summarize here.
Topics covered include: energy flow, water relations, mineral nutrition, translocation, growth, hormones, cell growth and differentiation, vegetative and reproductive development, photomorphogenesis, tropisms and resistance to stress.
