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Peristome as a potential tool for delimiting Bryum Hedw. (Bryaceae) from India

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Abstract

The peristome, an interesting and important taxonomic structure used in the systematics of mosses, is for the first time studied in detail for 21 taxa of Bryum, which constitute a fraction of Indian representatives. Macro- and micro-morphological characters including color, size and length of two components of peristome, tapering pattern, median line, and papillosity at upper part under light microscope; width of exostome border, number and inner surface of ventral trabeculae, presence or absence of longitudinal/oblique septae between ventral trabeculae, pattern of exostome surface and height of endostomial basal membrane, adherence, perforations, and surface of cilia under scanning electron microscope were examined to bring out submicroscopic differences. Detail surface structure of eight taxa, viz., B. apalodictyoides, B. evanidinerve, B. pachytheca, B. pseudotriquetrum var. subrotundum, B. reflexifolium, B. thomsonii, B. tuberosum, and B. turbinatum, under LM and nine species, namely, B. apalodictyoides, B. apiculatum, B. argenteum, B. billarderi, B. dichotomum, B. evanidinerve, B. recurvulum, B. turbinatum, and B. uliginosum, under SEM is being provided for the first time. Description of peristome surface and a key based on SEM and other taxonomical features is also being provided. The data obtained from the present study suggest that the species of this genus can easily be distinguished on the basis of peristomial surface pattern.

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Acknowledgements

Thanks are due to Director, CSIR-National Botanical Research Institute, Lucknow, for providing the facilities and Council of Scientific and Industrial Research, New Delhi, for the financial assistance. Thanks are also due to Director, Birbal Sahni Institute of Palaeosciences, Lucknow, for providing the scanning electron microscopy (SEM) facilities.

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  1. Plant Diversity, Systematics and Herbarium Division, C.S.I.R. – National Botanical Research Institute, Lucknow, 226 001, India

    Pooja Bansal & Virendra Nath

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  1. Pooja Bansal
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  2. Virendra Nath
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Correspondence to Pooja Bansal.

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Bansal, P., Nath, V. Peristome as a potential tool for delimiting Bryum Hedw. (Bryaceae) from India. Protoplasma 255, 1267–1280 (2018). https://doi.org/10.1007/s00709-018-1226-0

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