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Observations on the division characterization of diploid nuclear in Porphyra (Bangiales, Rhodophyta)

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Abstract

Nuclear divisions of carpospores, conchocelis and conchospores of Porphyra yezoensis, P. haitanensis, P. katadai var. hemiphylla and P. oligospermatangia from China were investigated. The observations showed diploid chromosome numbers of 2n = 6 for P. yezoensis and P. oligospermatangia, and 2n = 10 for P. haitanensis and P. katadai var. hemiphylla. For all four species, somatic pairing of chromosome sets was observed in late prophase. Sister chromosomes separated at anaphase as mitosis took place in carpospores, conchocelis filamentous cells, conchosporangial branch cells and sporangial cells (conchospore formation). Chromosome configurations of tetrad and ring-shaped in conchospore germination were observed, demonstrating the occurrence of meiosis. The characteristics of diploid nuclear division in 2n = 6 species are the same as those of 2n = 10 species. The influence of somatic pairing on nuclear division of diploid cells in Porphyra was discussed.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (NSFC, 40576074).

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Authors and Affiliations

  1. Department of Biology, Changshu Institute of Technology, Changshu, 215500, China

    Wei Zhou, Jianyi Zhu, Jinfeng Wang, Jianrong Xu & Pu Xu

  2. School of Life Sciences, Soochow University, Suzhou, 215123, China

    Wei Zhou & Songdong Shen

  3. School of Life Sciences, Nanjing University, Nanjing, 210093, China

    Shan Lu

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  1. Wei Zhou
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  2. Jianyi Zhu
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  3. Songdong Shen
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  4. Shan Lu
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  5. Jinfeng Wang
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  6. Jianrong Xu
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  7. Pu Xu
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Correspondence to Jianyi Zhu.

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Zhou, W., Zhu, J., Shen, S. et al. Observations on the division characterization of diploid nuclear in Porphyra (Bangiales, Rhodophyta). J Appl Phycol 20, 991–999 (2008). https://doi.org/10.1007/s10811-007-9235-y

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  • DOI: https://doi.org/10.1007/s10811-007-9235-y

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