Systematics of selected Philippine Medinilla species (tribe dissochaeteae, family melastomataceae) by comparative foliar Morpho- anatomy

Date

4-2011

Degree

Bachelor of Science in Biology

Major Course

Major in Systematics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Annalee Soligam-Hadsall

Abstract

Foliar morpho-anatomy of seven species of Philippine Afedinilla, namely, Al. cumingii, Al. magnifica, At miniata, M. myriantha, Al. pendula, M. purpurea, and M. speciosa, were surveyed. Using several characters, diversity in foliar morphology was observed among the seven species. General form, venation, and stomata characteristics were described. leaf cross sections of the seven species showed one typical pattern of histology. Ilypodermis below one or two layers of upper epidermal cells was seen in all cases, varying in the number of cell layers among the studied species. The lower epidermis was seen as one layer of cells. The number of cell layers in the spongy mesophyll and the number of vascular bundles in the midrib were also found to be varying. The palisade mcsophyll was found to be comprised of a single layer of elongated and sclerosed cells. The cells in the ground tissue surrounding the vascular bundles in the midrib were observed to be much larger than the cells in the spongy mesophyll layer. Aside front morpho-anatomy, additional notes on histochemistry were also included. !)rusts and tannins were observed to be present in the leaves of the seven species. Anthocyanins were found in only Al. pendula and M. speciosa. Using the morpho-anatomical characters of the leaf that vary among the seven species, similarity and distance coefficients were calculated and a dendrognun showing the relationships among species was constructed. With these, it was figured out that Al. magnifica and Al purpurea are the most closely related pair among the seven while M magnifica . speciosa are the most distantly related pair. The study has successfully discriminated the seven species of Medinilla from one another using only foliar .characteristics that vary among species.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

This document is currently not available here.

Share

COinS