Malaysian Applied Biology Journal

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Malays. Appl. Biol. (2009) 38(2): 11–16



School of Environment and Natural Resource Sciences,
Faculty of Science and Technology, Universiti Kebangsaan Malaysia,
43600 Bangi, Selangor, Malaysia
Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it


A comprehensive survey and descriptions on the petiole anatomy was undertaken on 16 Dipterocarpus species to investigate variations in vascular bundle structure that may be useful in classification and identification of species. All species have a complex structure of vascular bundles consisting of several closed rings of bundles. Five different types of vascular bundles i.e Type 1, 2, 3, 4 and 5 in the petiole transverse sections were found, based on the arrangement and system of vascular bundles strand. Types of vascular bundles were determined and suggested for easy reference. Results showed that the types of vascular bundles can be used for grouping of species in Dipterocarpus and also helping in species identification.

Tinjauan komprehensif dan huraian ke atas anatomi petiol melibatkan 16 spesies Dipterocarpus untuk mengenalpasti variasi struktur berkas vaskular yang boleh digunakan untuk pengelasan dan pengecaman spesies. Semua spesies yang dikaji mempunyai sktruktur berkas vaskular yang kompleks dan sistem vaskular jenis tertutup. Lima corak berbeza berkas vaskular petiol iaitu Corak 1, 2, 3, 4 dan 5 telah dikenalpasti berdasarkan susunan dan sistem berkas vaskular. Corak berkas vaskular ini dicadangkan untuk dijadikan rujukan yang mudah difahami. Kajian ini menunjukkan corak berkas vaskular boleh digunakan untuk mengelompokkan spesies dalam genus Dipterocarpusdan juga membantu pengecaman spesies.
Key words: Dipterocarpus, Petiole anatomy, Vascular bundles


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