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Quantitative comparison of foliage development amongDryopteris monticola, D. tokyoensis and a putative hybrid,D. kominatoensis in Northern Japan

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Abstract

Developmental leaf architecture was quantitatively described in terms of measurements of various parameters on leaf blade from different size of sporophytes inDryopteris monticola, D. tokyoensis and a putative hybrid,D. kominatoensis in the natural site of Hokkaido, to compare the ontogenetic differentiation in foliage structure among allied ferns. The morphological stage of leaf and sporophyte was tentatively quantified by the number of midrib branches of the leaf (NV, number of veins), which exhibited a significant correlation to the leaf-shape complexity from a circle (DI=marginal length/2×(3.14×square)1/2) of leaf blade.

D. kominatoensis showed intermediate values between others in following characters; DI increase, maximum NV (also blade length), maximum number of costa branches of pinnae (NVMP), number of costa branches of the lowest pinna (NVLP), difference between NVMP and NVLP (NVMP-NVLP), during heteroblastic leaf development. A larger number of leaves per sporophyte was found inD. kominatoensis than in others. The fertility rate (%) and initiation of fertility (IF) in the relative developmental stage (RDS) ofD. kominatoensis shifted to that ofD. tokyoensis, while the order of pinnae with NVMP shifted to that ofD. monticola. Even in the intermediate characters inD. kominatoensis, slight shifts in characters to those of putative parents were found during heteroblastic leaf development.

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Authors and Affiliations

  1. The Institute of Low Temperature Science, Hokkaido University, 060, Sapporo

    Toshiyuki Sato & Shiro Tsuyuzaki

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  1. Toshiyuki Sato
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  2. Shiro Tsuyuzaki
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Contribution No. 3145 from the Institute of Low Temperature Science, Hokkaido University.

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Sato, T., Tsuyuzaki, S. Quantitative comparison of foliage development amongDryopteris monticola, D. tokyoensis and a putative hybrid,D. kominatoensis in Northern Japan. Bot Mag Tokyo 101, 267–280 (1988). https://doi.org/10.1007/BF02488604

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  • DOI: https://doi.org/10.1007/BF02488604

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