Summary
Plastids and mitochondria in premeiotic cells ofEquisetum were situated at random. By early prophase I all these organelles aggregated for a short period into one group at the nuclear envelope, but subsequently the organelles became again scattered. By late prophase I they aggregated into two groups at opposite sides of the nucleus, then moved towards the equator of the cell. By interphase plastids and mitochondria aggregated into a layer which divided each dyad into two parts. After telophase II the reorganized layer divided the tetrad into four parts. The organelle layer underwent differentiation into three strata. The cell plate was formed in the middle one which was constituted of mitochondria.
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Bednara, J., Giełwanowska, I. & Rodkiewicz, B. Regular arrangements of mitochondria and plastids during sporogenesis inEquisetum . Protoplasma 130, 145–152 (1986). https://doi.org/10.1007/BF01276596
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DOI: https://doi.org/10.1007/BF01276596