Morphological characterization and meiotic study of the peach angel's trumpet (Datura mollis Saff.)

Date

4-2006

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Merlyn S. Mendioro

Abstract

Morphological characterization, meiotic behavior, and pollen fertility studies were done on Peach Angel's Trumpet, Datura mollis Saff. from Tagaytay City and Los Banos, Laguna. The plants in the two sites significantly differed in terms of matured leaf width and flower length. D. mollis in Los Banos, Laguna had more elongated mature leaves and longer flowers than D. mollis in Tagaytay City. The difference in the morphology between the two sites can be attributed to the environmental factors that could affect the expression of the genotype. Most cells (48.3% in Tagaytay City and 13.4% in Los Banos, Laguna) at diakinesis from the two sites showed 12 II. Therefore, the chromosome number of D. mollis is 2n=24. However, early separation of bivalents was observed at diakinesis. Meiotic behavior in both sites were found to be 100% normal except for the metaphase I in Los Banos, Laguna (93.76% normal) where there was a very low frequency of abnormalities such as early disjunction (1.94%) and laggards (4.30%). Telophase was normal (100%). As a consequence of the high frequency of normal meiotic behavior in D. mollis from the two sites, high pollen fertility was also obtained. Pollen fertility of D. mollis was 94.99% in Tagaytay City and 95.41% in Los Banos, Laguna.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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