Mitosis of kandi-kandilaan (Stachytarpheta jamaicensis (L.) Vahl)

Date

10-1993

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Adelina A. Barrion

Abstract

Mitosis at the root meristem of kandi-kandilaan (aiaghvtarpheta iamaicensis (L.) Vahl) occurs at 12:45 p. m. It is normal, regular and consists of four sequential stages, namely: prophase, metaphase, anaphase and telophase. During the prophase stage, the nuclear membrane starts to disintegrate and the chromosomes begin to contract. The chromosome numbers of the pre-metaphase cells range from 2n=70 to 2n=96. The cells have lengths ranging from 70.6 u to 208.27 u and widths from 24.71 u to 63.54 u. At metaphase, the chromosomes align at the equatorial plate. Cells have lengths ranging from 95.31 u to 201 u and widths ranging from 60.01 u to 88.25 u which are completely consumed by the chromosome spreads. Anaphase happens normally. Chromosomes converge to the center of the cells which measure 95.31 u to 158.85 u in length and 49.42 u to 105.9 u in width. Telophase also follows as sister chromatids segregate farther apart. Cell sizes range from 81.19 u to 137.67 u in length and 49.42 u to 105.9 u in width. Late telophase is marked by the appearance of the cell plate starting from the middle towards the periphery and the chromatin materials are enclosed by the nuclear membrane. Telophase was the most frequently encountered stage. Mitotic indices range from 3.34% to 5.53% and the mean mitotic index is 4.37%.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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