"Seedling morphology and cytoanatomical characterization of Solanum aethiopicum L., S. melongena L., S. torvum L. and S. viarum L."

Date

3-2009

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Celia B. Dela Viña

Abstract

The seedling morphological characters of ten accessions representing four species of nontuberiferous Solanum were determined using the Standard Solanum Descriptors of AVRDC-GRSU. Cytoanatomical characters, namely stomata! types, stomatal density, trichome types. trichome density, stem and root diameter, stem and root cortex thickness, and number of xylem vessels in the stem and root cross-sections were also obtained using epidermal peels and microtome sampling. S. aethiopicum geminated the earliest among the four Solanum species (six days). S. viarum has the longest cotyledon leaf length and the shortest cotyledon leaf width. Five types of stomates were observed, namely: anisocytic. anomocric, tetracytic, paracytic, and diacytic. Paracytic type was observed both in S aethiopicum (TS02220) and S. torvum (TS02302) while the diacytic type was only observed in S. form,: (TS02302). Both glandular and non-glandular trichomes were seen in the Solanum accessions. S. melongena susceptible to bacterial wilt showed the highest stomata! density but the lowest trichome density. S. currant had the thickest cortex while S viarum had the thinnest. The most number of xylem vessels in the stem were found in S. aethiopicum. When subjected to Spearman's Rho a=0.05, the stomatal density showed a strong negative correlation with trichome density. There was a moderate correlation between the stem cortex thickness and the number of xylem vessels in the stein. It can be concluded that resistance to pests and tolerance to adverse conditions of the Solanum species can possibly be assessed by identifying specific anatomical plant characters.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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