The major problem of the manufacturing plant, is a disease which may be caused by fungi, bacteria or viruses, so plants produced from the plant tissue culture.Without fungi and bacteria. First, because in tissue culture will show symptoms of contaminated bacteria. (contamination) by such displays group.Colony of bacterial or fungal spores to see with the naked eye. Which can keep out and to eliminate the contamination of the virus. The small particles and can survive when living in another สิ่งมีชีวิตชนิด cells only. Which plants contaminated with the virus will not show symptoms of contamination on food to see. But will know when the symptoms on the plants. So before the plant tissue to a screening and detection of tissue or parts of plants to be free of the virus most. By using the part of the meristem. Which is in the apical meristem or tissues of the embryo (embryo) in the seed. The tissue such pipes transporting water (xylem) and food (phloem) to contact with other parts of the plant, so the viral particles cannot enter.
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