Taxonomic value of leaf venation and trichome characteristics in some Byttneria L. and Pterocymbium R. BR. (Malvaceae s.l)

M. R. Nurshahidah, M. Nabilah, Noraini Talip, C. C K Richard, Ismail Sahid, A. B. Mohd-Arrabe

Research output: Contribution to journalArticle

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Abstract

A study on some leaf anatomical characteristics was undertaken on two genera in Malvaceae s.l namely Byttneria L. and Pterocymbium R. Br. The objective was to determine the taxonomic value of leaf venation characteristics especially in identification and classification of species. In the study, five species were chosen, three Byttneria species, namely B. curtisii, B. jackiana, B. maingayi, and two Pterocymbium species, namely P. tinctorium and P. tubulatum. Byttneria and Pterocymbium have been split into two subfamilies, Byttneroideae and Sterculoideae, of Malvaceae s.l respectively. Leaf clearing, staining, mounting and observation under a light microscope were techniques used for the study. Results showed that the similarities and differences in leaf venation could be useful in classification and identification of species. The common characteristics found in all species studied were the presence of entire marginal venation and closed system venation with minimum free ending veinlets in the areolar venation. The variations in the leaf venation can be used to distinguish species, which are complete ultimate marginal venation in B. curtisii and B. maingayi; curved to looped pattern and incomplete, ultimate marginal venation in B. jackiana, P. tubulatum and P. tinctorium. The presence of simple unicellular trichomes in B. jackiana and two types of trichomes (simple unicellular trichomes and multicellular glandular trichomes) and crystals alongside veinlets in P. tubulatum can also be used to further identify these two species from other species studied. Therefore, the study showed that leaf anatomical characteristics in Byttneria and Pterocymbium can be used in species identification and have taxonomic value.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalMalaysian Applied Biology
Volume42
Issue number2
Publication statusPublished - Dec 2013

Fingerprint

Malvaceae
Trichomes
trichomes
leaves
closed loop systems
Observation
light microscopes
Staining and Labeling
Light
crystals

Keywords

  • Byttneria
  • Leaf venation
  • Malvaceae
  • Marginal and areolar venation
  • Pterocymbium
  • Trichomes

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Taxonomic value of leaf venation and trichome characteristics in some Byttneria L. and Pterocymbium R. BR. (Malvaceae s.l). / Nurshahidah, M. R.; Nabilah, M.; Talip, Noraini; Richard, C. C K; Sahid, Ismail; Mohd-Arrabe, A. B.

In: Malaysian Applied Biology, Vol. 42, No. 2, 12.2013, p. 33-40.

Research output: Contribution to journalArticle

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abstract = "A study on some leaf anatomical characteristics was undertaken on two genera in Malvaceae s.l namely Byttneria L. and Pterocymbium R. Br. The objective was to determine the taxonomic value of leaf venation characteristics especially in identification and classification of species. In the study, five species were chosen, three Byttneria species, namely B. curtisii, B. jackiana, B. maingayi, and two Pterocymbium species, namely P. tinctorium and P. tubulatum. Byttneria and Pterocymbium have been split into two subfamilies, Byttneroideae and Sterculoideae, of Malvaceae s.l respectively. Leaf clearing, staining, mounting and observation under a light microscope were techniques used for the study. Results showed that the similarities and differences in leaf venation could be useful in classification and identification of species. The common characteristics found in all species studied were the presence of entire marginal venation and closed system venation with minimum free ending veinlets in the areolar venation. The variations in the leaf venation can be used to distinguish species, which are complete ultimate marginal venation in B. curtisii and B. maingayi; curved to looped pattern and incomplete, ultimate marginal venation in B. jackiana, P. tubulatum and P. tinctorium. The presence of simple unicellular trichomes in B. jackiana and two types of trichomes (simple unicellular trichomes and multicellular glandular trichomes) and crystals alongside veinlets in P. tubulatum can also be used to further identify these two species from other species studied. Therefore, the study showed that leaf anatomical characteristics in Byttneria and Pterocymbium can be used in species identification and have taxonomic value.",
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