Cytomixis Induced Meiotic Abnormalities in Pollen Mother Cells of Clematis flammula L. (Ranunculaceae)

• Kumar Puneet

  Department of Botany, Punjabi University

• Singhal Vijay Kumar

  Department of Botany, Punjabi University

• Kaur Jaspreet

  Department of Botany, Punjabi University

抄録

Meiotic studies carried out in the diploid (2n=2x=16) Clematis flammula L. revealed the occurrence of cytomixis. Chromatin transfer is observed from early prophase up to tetrad stage. Although the percentage of PMCs involved in chromatin transfer is low, but it definitely impairs the meiotic process. Cytomixis induces various other associated meiotic abnormalities which are observed at different meiotic stages. These meiotic abnormalities include; chromatin stickiness, laggards and chromatin bridges at anaphases and telophases, spindle abnormality, micronuclei at telophases and tetrad stages, micromicrospores and included micronuclei in microspores. Consequent to chromatin transfer, some pollen malformation and pollen grains of heterogenous sizes are resulted which are classified into small, medium and large sized. Another interesting phenomenon which has been observed during the present study is the occurrence of included micronuclei in the microspores and micrmicrospores in tetrads. Cytomixis and other meiotic abnormalities are reported for the first time in the species. We here also report for the first time the occurrence of B-chromosome in the species.

収録刊行物

• ＣＹＴＯＬＯＧＩＡ

  ＣＹＴＯＬＯＧＩＡ 73 (4), 381-385, 2008

  公益財団法人 日本メンデル協会

キーワード

• B-chromosome
• Chromatin transfer
• Included micronuclei
• Micromicrospore
• Chromatin stickiness

詳細情報

• CRID: 1390001204110557184
• NII論文ID: 10024883573
• NII書誌ID: AA00622764
• DOI: 10.1508/cytologia.73.381
• ISSN: 13487019
• ISSN: 00114545
• Web Site: http://www.jstage.jst.go.jp/article/cytologia/73/4/73_4_381/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可