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Leaf Architecture of Representative Hopea and Shorea Species (Dipterocarpaceae): Implication on Current Taxonomic Classification |
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| รหัสดีโอไอ | |
| Creator | Christine Dawn Obemio |
| Title | Leaf Architecture of Representative Hopea and Shorea Species (Dipterocarpaceae): Implication on Current Taxonomic Classification |
| Contributor | Inocencio Buot, Jr |
| Publisher | National Science Museum, Thailand |
| Publication Year | 2563 |
| Journal Title | The Thailand Natural History Museum Journal |
| Journal Vol. | 14 |
| Journal No. | 2 |
| Page no. | 103-111 |
| Keyword | cluster analysis, dipterocarps, principal component analysis |
| URL Website | http://www.thnhmjournal.com/ |
| Website title | THE THAILAND NATURAL HISTORY MUSEUM JOURNAL |
| ISSN | 1686-770X |
| Abstract | Leaf architecture of representative Hopea and Shorea species was evaluated. Details on its morphological characteristics: venation, shape, angle, size, among others were determined from representative herbarium vouchers in the Plant Biology Division, Institute of Biological Science and leaf samples from College of Forestry and Natural Resources of the University of the Philippines, Los Ba๑os, Laguna. Analysis through numerical taxonomic parameters was further undertaken to elucidate relationships among representative Hopea and Shorea species. Results showed four component axes accounting for approximately 94% of the cumulative variance, with axis 1, 2 and 3 accounting for >80% variability. From such axes, distinct clusters were noted in H. quisumbingiana, H. philippinensis, S. polysperma, and S. malibato suggesting their recognizably different morphology with reference to leaf ratio, apex and base angles, length, width and number of secondary veins. Moreover, parallels or close association have been observed between S. guiso and S. almon and that of H. mindanensis and H. plagata for the same characters as they appear to lie closely within the axis. Qualitative traits as leaf rank, venation and areolation appear to largely influence the observed variation in Hopea and Shorea groups. However, trees generated for both qualitative and quantitative morphological features showed clusters of both groups intermingling, suggesting the possibility of these groups to be the same with one subsumed in the other. Hence, deeper resolution of taxonomic relationship is warranted |
