ABSTRACT
A comparative morphological study on the leaf of Melastomataceae was made for 21 species of 11 genera in Taiwan. The morphological characters studied include leaf venation, trichome, epidermal cell, anticlinal wall, stomatal type and crystal type. The results are given as follows. Two types of venation are recognized, i.e. pinnate and palmate venations. The leaves of all species showed their palmate venation except for those of Memecylon lanceolatum. Seven types of trichrome could be observed in the studied species, which consist of peltate scales, bladder-like glandular hairs, multiseriate unbranched hairs, multiseriate unbranched glandular hairs, short-stalked glandular hairs, armed hairs and stellate with glandular hairs. All of species have short-stalked glandular hairs occurred on the leaves of all species except Memecylon lanceolatum which has no trichrome at all. In addition, bladder-like glandular hairs on upper epidermis of leaves in Medillia and on both epidermis of leaves in Blastus. The epidermal cells of the leaf surfaces are polygonal or irregular in shapes, and the anticlinal walls are straight, arched, repand and sinuous. There are five types of stomata, which are composed of anomocytic type, diacytic type, paracytic type, polocytic type and staurocytic type. Only Melastoma kudoi and Osbeckia chinensis have stomata at upper epidermis. Two kinds of crytals appeared, i. e. styloids and druses. However, the occurrence of crystal is unstable specifically and generically, which implies that it is invaluable for specific and generic delineation. Additionally, druses could be found epiphytic on multiseriate unbranched hairs of the genera Melastoma and Osbeckia. According to this study, the features of leaf venation, trichrome, epidermis cell, anticlinal wall and stomatal type could provide evidence for taxonomy of this family.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0730108-151700 |
| Date | 30 July 2008 |
| Creators | Hsiao, Ping-min |
| Contributors | Chang-Sheng Kuoh, Yuen-po Yang, C. R Sheue |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730108-151700 |
| Rights | restricted, Copyright information available at source archive |
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