Sains Malaysiana 47(4)(2018): 645-649

http://dx.doi.org/10.17576/jsm-2018-4704-01

 

Anatomi Rizom dan Stip Genus Pleocnemia Presl (Tectariaceae) di Semenanjung Malaysia

(Anatomy of Rhizomes and Stipes Genus Pleocnemia Presl (Tectariaceae) in Peninsular Malaysia)

 

MAIDEEN, H.,* SYAZWANI, B., NIK NORHAZRINA, N.M.K., NUR-ALIAH, M.K., NORAINI, T. & NUR FARHANIM, I.

 

School of Environmental and Natural Resource Sciences Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

Diserahkan: 15 Jun 2017/Diterima: 13 Oktober 2017

 

ABSTRAK

 

Kajian anatomi rizom dan stip telah dijalankan ke atas empat spesies Pleocnemia yang terdapat di Semenanjung Malaysia iaitu P. irregularis, P. conjugata, P. hemiteliiformis dan P. olivacea untuk mengkaji variasi ciri anatomi yang terdapat pada rizom dan stip ini. Kajian ini melibatkan keratan rentas stip dan rizom dengan menggunakan mikrotom gelongsor. Ciri anatomi stip seperti bentuk luaran, corak kehadiran sel sklerenkima di bawah epidermis, jenis dan bentuk stel dan ciri anatomi rizom seperti kehadiran sel rembes tanin dan kehadiran serta jenis trikom pada sesetengah spesies boleh digunakan untuk pengecaman spesies. Ciri sepunya bagi spesies Pleocnemia yang dikaji ialah kehadiran sel sklerenkima mengelilingi stel dan di bawah lapisan sel epidermis, stel jenis kompleks serta stel bagi kesemua spesies kajian berbentuk protostel primitif (bulat). Antara ciri diagnosis yang ditemui dalam kajian ini ialah bentuk luaran stip, bilangan lapisan skelerenkima di bawah epidermis, kehadiran sel rembes tanin bagi spesies P. irregularis dan P. hemiteliiformis serta kehadiran jenis trikom yang berbeza dalam keempat-empat spesies. Ciri diagnosis ini adalah ciri yang baik untuk pengecaman spesies kajian. Keputusan kajian ini menunjukkan bahawa ciri anatomi stip dan rizom mempunyai nilai taksonomi dalam genus Pleocnemia dan boleh digunakan sebagai data sokongan untuk pengecaman dan pembezaan spesies.

 

Kata kunci: Anatomi; Pleocnemia; protostel primitif; rizom; Semenanjung Malaysia

 

ABSTRACT

 

Anatomical studies of the stipe and rhizome were conducted on four Pleocnemia species recorded in Peninsular Malaysia, namely P. irregularis, P. conjugata, P. hemiteliiformis and P. olivacea to investigate the anatomical variations of the stipe and rhizome. Cross-section of the stipe and rhizome was done using sliding microtome. Stipe anatomical characteristics such as stipe outline, pattern of schlerenchyma cells under epidermal layers, stele types and shapes and rhizome anatomical characteristics such as presence of tanniferous idioblast cells, presence and types of trichomes were useful for species identification. The shared characters in all the Pleocnemia species studied were the presence of schlerenchyma cells below the epidermal layers and surrounding the steles, complex steles shape and primitive protestele (round). Diagnostic characteristics found in this study were stipe outline, number of schlerenchyma cell layers below the epidermal cells, presence of tanniferous idioblast cells in P. irregularis and P. hemiteliiformis and the different types of trichomes in all the four species. These diagnostic characters were useful for identification of the studied species. The present study showed that stipe and rhizome anatomical characteristics have taxonomic value in Pleocnemia and are useful support data for species differentiation and identification.

 

Keywords: Anatomy; Peninsular Malaysia; Pleocnemia; primitive protostele; rhizome

 

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*Pengarang untuk surat-menyurat; email: aliahkhaduwi@gmail.com