Taxonomic significance of petal and sepal micromorphological characteristics in some Justicia nees (Acanthaceae) species in Peninsular Malaysia

Amirul Aiman Ahmad Juhari, Noraini Talip, Che Nurul Aini Che Amri, Siti Khaulah Abdul Razak, Nurul Syahirah Mansur, Amalia Rusydi, Ruzi Abdul Rahman

Research output: Contribution to journalArticle

Abstract

Acanthaceae is a flowering plants family under the order Lamiales and comprises at least 4,000 species regardless of tropical and subtropical species with Justicia being the largest genus under this family. The study on the flower’s petal and sepal micromorphology have been done on six Justicia species, namely as Justicia betonica L., J. carnea Lindl., J. comata (L.) Lam., J. gendarussa Burm.f., J. procumbens L. and J. ptychostoma Nees. Methodology used involves fixation, dehydration series, critical point drying technique and observation under scanning electron microscope. Results have shown that all six species have differences in micromorphological characteristics in the sepals and petals epidermal surfaces. Cuticular wax can be found on both abaxial and adaxial epidermal surfaces of petal and sepal for all species studied. Granular cuticular wax is the only type of cuticular wax was found present on petal and sepal of all species studied. There are also eight types of trichomes present on the petal epidermal surface and eight types of trichomes present on the sepal epidermal surface. J. betonica can be recognised directly by having amphidiacytic stomata on petal epidermal surface while stomata were absent on the petal epidermal surface of other species. As a conclusion, findings in this study have proven that petal and sepal micromorphological characteristics have systematic significant and can be used as supporting data for species differentiation and identification in the genus Justicia.

Original languageEnglish
Pages (from-to)51-69
Number of pages19
JournalTropical Life Sciences Research
Volume30
Issue number2
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Justicia
Acanthaceae
Malaysia
calyx
corolla
Waxes
Stachys
Trichomes
epicuticular wax
Justicia carnea
Dehydration
stomata
trichomes
Lamiales
Observation
Electrons
Drying
Electron microscopes
scanning electron microscopes
interspecific variation

Keywords

  • Acanthaceae
  • Justicia
  • Sepal and Petal Micromorphology

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Taxonomic significance of petal and sepal micromorphological characteristics in some Justicia nees (Acanthaceae) species in Peninsular Malaysia. / Ahmad Juhari, Amirul Aiman; Talip, Noraini; Amri, Che Nurul Aini Che; Razak, Siti Khaulah Abdul; Mansur, Nurul Syahirah; Rusydi, Amalia; Rahman, Ruzi Abdul.

In: Tropical Life Sciences Research, Vol. 30, No. 2, 01.01.2019, p. 51-69.

Research output: Contribution to journalArticle

Ahmad Juhari, Amirul Aiman ; Talip, Noraini ; Amri, Che Nurul Aini Che ; Razak, Siti Khaulah Abdul ; Mansur, Nurul Syahirah ; Rusydi, Amalia ; Rahman, Ruzi Abdul. / Taxonomic significance of petal and sepal micromorphological characteristics in some Justicia nees (Acanthaceae) species in Peninsular Malaysia. In: Tropical Life Sciences Research. 2019 ; Vol. 30, No. 2. pp. 51-69.
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