Systematic significance of leaf anatomy in Johannesteijsmannia H.E. Moore (Arecaceae)
2012
Noraini T. | Ruzi A. R. | Nurnida M. K. | Hajar N. R.
A comparative leaf anatomy study was undertaken onJohannesteijsmanniaH.E. Moore in Peninsular Malaysiain order to assess leaf anatomical variation which may be useful in species identification. All four speciesrepresentatives of Malaysian Johannesteijsmannia were studied. Idioblast cells, sclereids, sclerenchymatousinner bundle sheaths, parenchymatous outer bundle sheaths, division of phloem in the vascular bundles, sub-epidermal fibrous strands below abaxial and adaxial epidermis are commonly present in all the species studied.The outline of the leaf margins, types of stomata, shaped of epidermis cells on the adaxial side, the positionof vascular bundles in the leaf lamina and the presence of simple unicellular trichome, fibres at the tip of leafmargins, sub-epidermal fibrous strands in the mesophylls cells, hypodermis layer below adaxial epidermis andstegmata are useful in distinguishing individual species. In conclusion, anatomical characters have systematicsignificance in Johannesteijsmannia, especially at the species level.
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