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http://doi.org/10.17576/jsm-2022-5106-01
Stem and Leaf Anatomical Studies of Selected Species of Barlerieae and Ruellieae (Acanthaceae) from
Yemen
(Kajian Anatomi Batang dan Daun Spesies Terpilih Barlerieae dan Ruellieae (Acanthaceae) dari Yemen)
ANISA S. AL-HAKIMI1,2,*,
SARAH ABDUL RAZAK1, N. OMAR3, ABDULWAHAB A. SAEED2,
SHAMSUL KHAMIS4 & A. LATIFF4
1Institute of
Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala
Lumpur, Federal Territory, Malaysia
2Biology
Department, Faculty of Applied Science, Taiz University, Taiz, Yemen
3Department of
Biology, Faculty of Art and Science, University of Benghazi, Al-Abiar Branch, Libya
4Department of
Biological Science and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia,
43600 UKM Bangi, Selangor Darul Ehsan, Malaysia
Received: 1
December 2019/Accepted: 26 November 2021
Abstract
The anatomy of stems and leaves of selected species of tribes Barlerieae and Ruellieae (Acanthaceae) was studied to assess the taxonomic
significance of anatomical characteristics in the two tribes. The anatomical
characters such as the outline of stems, midribs, petioles, margins, shape of
epidermal cells, vascular bundles, stomata, anticlinal cells, cystoliths, aerenchyma cells, layer of wax, layer of
hypodermis were observed and analysed. Type of
trichomes observed on the leaf surface using Scanning Electron Microscopy and
light microscope provides information of taxonomic significance to both tribes
and the taxa within them. The trichomes vary from non-glandular (unicellular,
bicellular, multicellular, and multiradiate) to capitate glandular. Abundance of
long-stalked trichomes was recorded only in Neuracanthus aculeatus. Cystoliths of different size and position
are present in epidermis, parenchyma and collenchyma in addition to oil cells
in some genera. The placement of Neuracanthus among
the recognized tribes of Acanthaceae is assessed
using anatomical characters.
Keywords: Acanthaceae; anatomy; Barlerieae; Neuracanthus; Ruellieae;
Yemen
Abstrak
Anatomi batang dan daun bagi spesies terpilih daripada tribusBarlerieae dan Ruellieae (Acanthaceae) telah dikaji untuk menilai kesignifikanan ciri taksonomi dalam kedua-dua tribus yang tersebut. Beberapa sifat seperti bentuk umum luar batang, tulang daun, petiol, tepi daun, bentuk sel epidermis, berkas vaskular, stomata, sel antiklin, sistolit, aerenkima, lapisan lilin, lapisan hipodermis juga telah diperhati dan dianalisiskan. Jenis trikom atas permukaan daun yang dicerap di bawah mikroskop imbasan elektron dan mikroskop cahaya memberikan maklumat taksonomi yang signifikan untuk kedua-dua tribus dan juga takson yang berada di bawahnya. Trikom bervariasi daripada yang ringkas (bukan berkelenjar unisel, bisel, berbilang sel dan berbagai radiat) hingga berkelenjar berkepala. Kelimpahan trikom bertangkai hanya direkodkan pada Neuracanthus aculeatus. Sistolit pelbagai saiz dan kedudukan hadirdalam epidermis, parenkima dan kolenkima yang hadir bersama dengan sel minyak dalam beberapa genus. Perletakan Neuracanthus dalam tribus yang diiktirafkan dalam Acanthaceae turut dinilai menggunakan ciri anatomi.
Kata kunci: Acanthaceae; anatomi; Barlerieae; Neuracanthus; Ruellieae; Yemen
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*Corresponding author; email:
saeedanisa3@gmail.com
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