Summary
Wheat roots from germinating seedlings of Chinese spring wheatTriticum aestivum grown for 36 hours at 20°C were examined by conventional thin-section electron microscopy. Virus-like particles were seen inside a large cytoplasmic intrusion into the nucleus having the appearence of a nucleolar vacuole. The particles were isometric and about 50 nm in diameter with a membrane-like coat and a small core. The cytoplasmic intrusion was bounded by nuclear envelope with pores apparent where it abutted nucleoplasm. The particles are similar to previously reported solitary particles “S bodies” from a range of plants but are also similar in size and morphology to the retroposon particles associated with copia like elements in other organisms. The position of the virus-like particles in the young wheat roots is discussed in relation to interactions with components of the cell skeleton.
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Jordan, E.G., Cooper, P.J. Cytoplasmic virus-like particles associated with the nucleolus in wheat, similar to “S bodies” and retroposon particles. Protoplasma 133, 160–164 (1986). https://doi.org/10.1007/BF01304631
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DOI: https://doi.org/10.1007/BF01304631