Journal of Wood Science

, Volume 64, Issue 5, pp 467–476 | Cite as

Secretion of a callose hollow fiber from herbaceous plant protoplasts induced by inhibition of cell wall formation

  • Satomi Tagawa
  • Tetsuo KondoEmail author
Original Article


The current study attempts to verify secretion of a callose hollow fiber from plant protoplasts, which was previously reported in woody plants, as a common stressed culture-induced phenomenon among plants, by re-examining herbaceous plant cultured cells of tobacco BY-2 (Nicotiana tabacum L. cv. Bright Yellow 2) and Arabidopsis thaliana allowing inhibition of cell wall formation. Then, inhibition of cell wall formation was found to induce the secretion of callose fibers by adding isoxaben, an inhibitor of cellulose synthesis, into the stressed culture medium. The inducing period for the secretion from both tobacco BY-2 and A. thaliana was shorter than that previously reported in Betula platyphylla (white birch). The secreted fibers were observed by confocal laser scanning microscopy and atomic force microscopy. The microscopic images indicated that the callose fibers from herbaceous plants did not necessarily possess a similar structure to hollow fibers from white birch. Eventually, it has been demonstrated that the secretion of callose fibers from protoplasts can be a stress-induced phenomenon commonly occurring in plants, but their hierarchical 3D-fiber structures are likely to depend on species.


Plant protoplasts β-1,3-glucan Callose hollow fiber Cell wall formation Stress response 



The authors are grateful to Prof. Ken Matsuoka, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, for providing liquid cultured cells of tobacco BY-2. Center for Advanced Instrumental and Educational Supports, Faculty of Agriculture, Kyushu University, is acknowledged for assistance in observation using confocal laser scanning microscopy (Leica SP8).


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Copyright information

© The Japan Wood Research Society 2018

Authors and Affiliations

  1. 1.Graduate School of Bioresource and Bioenvironmental SciencesKyushu UniversityFukuokaJapan

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