Malaysian Applied Biology Journal

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49_05_03

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Malays. Appl. Biol. (2020) 49(5): 25–31

 

THE VARIATION OF CYSTOLITHS AND ITS TAXONOMIC

SIGNIFICANCE IN ACANTHACEAE OF

PENINSULAR MALAYSIA


SITI MAISARAH ZAKARIA1, CHE NURUL AINI CHE AMRI1*, NORAINI TALIP2,

ABDUL LATIFF2, AMIRUL AIMAN AHMAD JUHARI3, ROZILAWATI SHAHARI1,

NUR SHUHADA TAJUDIN1 and MOHAMAD RUZI ABDUL RAHMAN2


1Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia,

Jalan Sultan Ahmad Shah, 25200 Kuantan, Pahang

2School of Environment and Natural Resource Sciences, Faculty of Science and Technology,

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor

3Department of Environment, Faculty of Forestry and Environment,

Universiti Putra Malaysia, 43400 UPM Serdang, Selangor

*E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Accepted 22 April 2020, Published online 31 December 2020

 

ABSTRACT

The foliar anatomical studies of 41 species of Acanthaceae from Peninsular Malaysia had been carried out. This study aims to identify the morphology and distributions of cystoliths in leaf anatomy and their taxonomic values in species studied of Acanthaceae. The foliar anatomical study involved procedures such as cross-section by using sliding microtomes on the petiole, lamina, and midrib, epidermal peel, leaf clearing, and observation under a light microscope. The finding in this study showed four types of cystoliths present in all species studied except in Acanthus, Staurogyne, Thunbergia, and Avicennia. Generally, they are present in lamina, petiole, and midrib but differ in shapes and sizes. Four types of cystolith cells are either solitary with round cystoliths, solitary with elongated cystoliths with blunt extremities, solitary with elongated cystoliths with one end pointed, or solitary with a point at both ends. However, this type of cystoliths is varied even within the same species either in petiole, midrib, or lamina. In conclusion, results showed that the occurrence and variation of cystolith cells have a taxonomic significance which can be used in identification and classification either at genus or species level in Acanthaceae.


Key words: Cystolith cells, leaf anatomy, taxonomic significance, Acantha

 

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