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Karyomorphological analysis of five species of Murdannia Royle (Commelinaceae), including two endemics to India

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Abstract

The study examines the karyotype and somatic chromosome numbers of five species of Murdannia Royle (Commelinaceae). The karyotype details of the two species namely M. blumei and M. lanceolata endemic to India are reported for the first time. The karyotype formula of the examined species are: M. blumei - 2n (36) = 1M+12m+5sm; M. lanceolata - 2n (20) = 2m+8sm; M. crocea subsp. ochracea - 2n (36) =7m+8sm+3st; M. spirata - 2n (40) = 9m+8sm+3st and M. triquetra - 2n (40) = 16m+4sm. Further details on karyomorphology including estimates of asymmetry indices, total form percent, ratio of mean length of short arms to long arms, intrachromosomal / interchromosomal asymmetry indices, and centromeric indices are provided. The karyomorphological parameters thus analysed suggest that M. blumei and M. lanceolata fit into the 2A category while M. crocea subsp. ochracea, M. spirata and M. triquetra belonged to the 2B category of Stebbins’ classification.

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Acknowledgements

Authors are grateful to Head, Department of Botany, University of Calicut for facilities and Sreekutty T.K. is grateful to CSIR- HRDG, New Delhi for fellowship.

Funding

Funding was provided by CSIR-HRDG, New Delhi (File No: 09/043(0193)/2019-EMR-1).

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  1. Department of Botany, University of Calicut, 673635, Thenhipalam, Kerala, India

    Sreekutty Thelakkattu Krishnan Nair & Santhosh Nampy

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  1. Sreekutty Thelakkattu Krishnan Nair
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  2. Santhosh Nampy
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All authors are univocally approved for the work. STK collected the plant specimens, carried out the experiments and prepared manuscript. SN designed the study, supervised experimentation, helped in data interpretation and revised the manuscript.

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Correspondence to Santhosh Nampy.

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Corresponding Editor: Umesh C Lavania; Reviewers: Anath Bandhu Das, Surochita Basu, M M Lekhak, Geeta Sharma

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Nair, S.T.K., Nampy, S. Karyomorphological analysis of five species of Murdannia Royle (Commelinaceae), including two endemics to India. Nucleus 65, 187–192 (2022). https://doi.org/10.1007/s13237-022-00386-3

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