Abstract
The ontogenetic and seasonal variations in the organization of the shoot apical meristem ofOsmunda japonica Thunb. were investigated. The meristem is composed of an apical segmentation zone (SZ), a mother cell zone of the stele (MS) and a periphereal zone (PZ). A single apical cell is mostly discernible in all sesons throughout the whole process of ontogeny observed in the present study. The paical cell is usually four-sided, nearly triangular, with a regular segmentation pattern in transverse view. However, it is sometimes acccurately three-sided with a highly regular segmentation pattern in the active season, while it is often four-sided, nearly trapezoid or five-or six-sided, with a less regular segmentation pattern in the inactive season. The size of the apical cell represented by its free surface are increases with the increase in size of the plant body in the young plants. However, in the adult plants, the size of the apical cell is smaller in the active season and larger in the dormant season. The organization pattern of the shoot apical meristen ofO. japonica does not show an intermediate type between the eusporangiate and the leptosporangiate ferns, but the leptosporangiate fern type.
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References
Bower, F.O. 1889. The comparative examination of the meristems of ferns, as a phylogenetic study. Ann. Bot.3: 305–392.
Cross, G.L. 1931. Meristem inOsmunda cinnamomea. Bot. Gaz.91: 65–76.
D'Amato, F. 1975. Recent findings on the organization of apical meristems with single apical cell. Giorn. Bot. Ital.109: 321–334.
Frazer, H.L. 1946. Seasonal changes in the shoot apex ofDryopteris aristata. Ann. Bot. N.S.10: 391–408.
Guttenberg, H. von 1966. Histogenese der Pteridophyten. Handb. d. Pflanzenanat.VII/2, Gebrüder Borntraeger, Berlin.
Hébant-Mauri, R. 1975. Apical segmentation and leaf initiation in the tree fernDicksonia squarrosa. Can. J. Bot.53: 764–772.
Imaichi, R. 1974. Studies on the extra-axillary buds ofHypolepis punctata. (2) Histogenesis. J. Jap. Bot.49: 33–39.
Iossa, M. 1914. Le développment de l'appareil conducteur dans les rhizomes des osmundacées et Gleichéniacées. Trans. Inst. Bot. Univ. Genèvo, Sér 8. fasc.12: 1–42.
Kuehnert, C.C. andJ.P. Miksche. 1964. Aplication of the 22.5 mev deuteron microbeam to the study of morphogenetic problems within the shoot apex ofOsmunda claytoniana. Amer. J. Bot.51: 743–747.
McAlpin, B.W., andR.A. White. 1974. Shoot organization in the Filicales: The promeristem. Amer. J. Bot.61: 562–579.
Sass, J. 1958. Botanical microtechnique. Iowa State Univ. Press, Ames.
Soma, K. 1966. On the shoot apices ofDicranopteris dichotoma andDiplopterigium glaucum. Bot. Mag. Tokyo79: 457–466.
Steeves, T.A. 1963. Morphogenetic studies onOsmunda cinnamomea L. The shoot apex. J. Ind. Bot. Soc.42 A: 225–236.
— andW.R. Briggs. 1958 Morphogenetic studies onOsmunda cinnamomea L: The origin and early development of vegetative fronds. Phytomorph.8: 60–72.
Sussex, I.M. andT.A. Steeves. 1967. Apical initials and the concept of promeristem. Phytomorph.17: 387–391.
Wardlaw, C.W. 1944. Experimental and analytical studies of pteridophytes. III Stelar morphology: The initial differentiation of vascular tissue. Ann. Bot. NS.8: 173–188.
— 1945. The shoot apex in pteridophytes. Biol. Rev.20: 100–114.
Wetter, R. andC. Wetter. 1954. Studien über das Erstarkungswachstum und das primäre Dickenwachstum bei leptosporangiaten Farnen. Flora141: 598–631.
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Imaichi, R. Anatomical study on the shoot apex ofOsmunda japonica thunb. Bot Mag Tokyo 90, 129–141 (1977). https://doi.org/10.1007/BF02498236
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DOI: https://doi.org/10.1007/BF02498236