Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485507
Title: Systematic studies of Shorea, Hopea, Parashorea and Neobalanocarpus (Dipterocarpaceae) in Malaysia
Author: Talip, Noraini binti
Awarding Body: University of Reading
Current Institution: University of Reading
Date of Award: 2006
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Abstract:
The investigation presented in this thesis aims to prove that selected characters of leaf anatomy, pollen morphology and phytochemistry have taxonomic value (systematic and diagnostic) in four selected genera (Shorea, Hopea, Parashorea and Neobalanocarpus) of the tribe Shoreae of Malaysian Dipterocarpaceae. The presence of glandular hairs, sclerenchyma completely or partly surrounding the primary and secondary vascular bundles in the lamina, parenchyma cells completely encircling or confined to the flanks of the vascular bundles in primary or primary vascular bundles in the lamina, sclerenchyma cells (sclereids or fibres) scattered around the peripheral vascular bundles and phloem sclerenchyma in the vascular bundle system in the petioles, druses and solitary crystals, phloem sclerenchyma in the midrib vascular bundles and sclerenchyma cells either completely or incompletely ensheathing the midrib vascular bundles are common in all Dipterocarpaceae species and definitely of taxonomic value. The outline of the margin is very useful for differentiating species. The relative prominence of the midrib and primary veins, the type of primary vascular bundle and the girder type and outline can be used to delimit taxa at lower genetic levels (sections and subsections). The presence or absence of peltate scale-like, simple lobed trichomes and the number of resin canals in the primary vascular bundles in the lamina can be used in the delimitation at generic level. Leaf epidermis features under the LM are useful for distinguishing taxa and as diagnostic characters for a few species. Epidermal cell TS under LM can be used for delimitation at generic and subgeneric level with the presence of a papillose abaxial epidermis.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.485507  DOI: Not available
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