Summary
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1.
Observations have been made on the premeiotic, meiotic, and postmeiotic stages inEremurus himalaicus Baker. These include: the last premeiotic mitosis, leptotene, in which the chromosomes form a bundle, the zygotene bouquet, pachytene, the second contraction stage in diplotene, diakinesis, the first and second meiotic divisions, and the first pollen grain mitosis.
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2.
The working hypothesis is put forward that these stages are characteristic of plant meiosis in general.
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3.
The very rare occurrence of interlocking of bivalents and multivalents in plants with a high chiasma frequency and several pairing blocks is explained on the basis of the polarized bouquet stage during which the homologous chromosomes sort themselves out.
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4.
The relationship of the meiotic process to the mitotic cycle is discussed.
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Oksala, T., Therman, E. The polarized stages in the meiosis of liliaceous plants. Chromosoma 9, 505–513 (1957). https://doi.org/10.1007/BF02568090
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DOI: https://doi.org/10.1007/BF02568090