Some Observations on the Cytology in Ochna sp(Ochnaceae).

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Ochna's meiosis has been analysed in search of factors that could cause the abortion of fruits. Results showed low frequency of meiotic irregularities but high frequency of tetrads with a variable number of microcytes, besides converging spindles in meiosis II leading up to the formation of triads. Abnormal behaviour of the nucleolus was also observed in many microsporocytes. These factors may explain, at least in part, the high frequency of abortion in Ochna's fruit.

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