Sains Malaysiana 42(5)(2013): 693–696

Systematic Significance of Stipe Anatomy of Selaginella (Selaginellaceae) in Peninsular Malaysia

(Kepentingan Sistematik Anatomi Stip Selaginella (Selaginellaceae) di Semenanjung Malaysia)

Haja Maideen*, A. Nor Hazwani, Z. Nurfarahain, A. Damanhuri, T. Noraini, L. Qistina & M. Masnoryante

School of Environmental & Natural Resource Sciences, Faculty of Science & Technology

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

G. Rusea

Department of Biology, Faculty of Science, Universiti Putra Malaysia

43400, Serdang, Selangor, Malaysia

Received: 12 March 2012/Accepted: 17 September 2012

ABSTRACT

An anatomical study was carried out on 14 taxa belonging to Selaginellaceae in an attempt to study their stipe anatomical characteristics and to provide anatomical data for the selected taxa in Selaginellaceae. Out of 29 taxa of Selaginellaceae recorded in Peninsular Malaysia, 14 taxa have been selected namely Selaginella alutacia, S. argentea, S. frondosa, S. intermedia var. intermedia, S. intermedia var. dolichocentrus, S. mayeri, S. morganii, S. ornata, S. plana, S. polita, S. roxburghii var. roxburghii, S. stipulata, S. wallichii and S. willdenowii. Method used in this study was sectioning using sliding microtome. Findings in this study have shown that Selaginellaceae species studied can be clustered into two groups based on the stipe stellar systems, which are monostelic and tristelic groups. There are some variations exist in the cross sections of the stipes of the same species due to the presence and absence of the leaf trace. Each species is proved to have distinct stipe anatomical characteristics that can be used to differentiate species in Selaginellaceae.

Keyword: Anatomy; Peninsular Malaysia; Selaginellaceae; stele; stipe

ABSTRAK

Kajian anatomi telah dilakukan ke atas 14 takson daripada famili Selaginellaceae untuk melihat ciri anatomi stip dan menyediakan data anatomi untuk takson terpilih daripada famili Selaginellaceae. Sejumlah 14 daripada 29 takson Selaginellaceae yang terdapat di Semenanjung Malaysia telah dipilih iaitu Selaginella alutacia, S. argentea, S. frondosa, S. intermedia var. intermedia, S. intermedia var. dolichocentrus, S. mayeri, S. morganii, S. ornata, S. plana, S. polita, S. roxburghii var. roxburghii, S. stipulata, S. wallichii dan S. willdenowii. Kaedah yang digunakan dalam penyelidikan ini ialah hirisan dengan mikrotom gelongsor. Hasil kajian menunjukkan spesies Selaginellaceae boleh dikelompokkan kepada dua kumpulan berdasarkan sistem stel pada stip iaitu kumpulan monostelik dan tristelik. Terdapat variasi pada ciri anatomi keratan rentas stip dalam spesies yang sama disebabkan kehadiran dan ketidakhadiran kesan daun pada stip. Setiap spesies kajian dibuktikan mempunyai ciri anatomi stip yang berbeza yang boleh digunakan untuk pembezaan spesies dalam famili Selaginellaceae.

Kata kunci: Anatomi; Selaginellaceae; Semenanjung Malaysia; stel; stip

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*Corresponding author; email: deen@ukm.my