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Morphology of Flower, Pollen and Orbicules of Meghalayan Dioscorea L. (Dioscoreaceae), North-East India:A Pivotal Taxon in the Evolution of Monocot


Affiliations
1 Department of Botany, North Eastern Hill University, Shillong (Meghalaya), India
     

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Flowers, pollen and orbicules morphology is an important source of information for systematic and evolutionary studies among different species, genera and families level. In the present study the floral, pollen and orbicules morphology of 80 samples of the genus Dioscorea L. representing 8 species native to Meghalaya were studied. Trichopus and Tacca, the allied genera with Burmannia of Burmanniaceae, nearest family of Dioscoreaceae were selected as an outgroup for the present study. Variation in floral, pollen and orbicules characters were observed and 62 descriptors or traits were selected for morphometric analysis. Pollen of Dioscorea is monosulcate or bisulcate with perporate or microrecticulate sexine sculptures. Orbicules were mostly spherical with smooth surface.

Keywords

Floral Morphology, Pollen Aperature, Sexine Ornamentation, Orbicule Morphology, Morphometric Analysis.
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  • Morphology of Flower, Pollen and Orbicules of Meghalayan Dioscorea L. (Dioscoreaceae), North-East India:A Pivotal Taxon in the Evolution of Monocot

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Authors

Nilofer Sheikh
Department of Botany, North Eastern Hill University, Shillong (Meghalaya), India
Yogendra Kumar
Department of Botany, North Eastern Hill University, Shillong (Meghalaya), India

Abstract


Flowers, pollen and orbicules morphology is an important source of information for systematic and evolutionary studies among different species, genera and families level. In the present study the floral, pollen and orbicules morphology of 80 samples of the genus Dioscorea L. representing 8 species native to Meghalaya were studied. Trichopus and Tacca, the allied genera with Burmannia of Burmanniaceae, nearest family of Dioscoreaceae were selected as an outgroup for the present study. Variation in floral, pollen and orbicules characters were observed and 62 descriptors or traits were selected for morphometric analysis. Pollen of Dioscorea is monosulcate or bisulcate with perporate or microrecticulate sexine sculptures. Orbicules were mostly spherical with smooth surface.

Keywords


Floral Morphology, Pollen Aperature, Sexine Ornamentation, Orbicule Morphology, Morphometric Analysis.

References