OMIKRON / SCIENCE PHOTO LIBRARY OMIKRON / SCIENCE PHOTO LIBRARY
Each virus consists of a protein coat with internal RNA genetic material. Some viruses are attached end-to-end. The virus enters a host cell in a tobacco plant and commandeers its DNA, instructing it to reproduce more TMVs. The effect of TMV infection varies from outright death of the host plant to severe lesions or mottling of the leaves. Plant viruses like TMV are transmitted by insects, pests and nematode worms. Magnification: 220,000x. Enhancement of 5P8554.
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