Effect of catharanthus pusillus (Tiny Periwinkle) in the Mitotic activity of Allium cepa.

Marajas, Krisha Mae G. and Narvaez, Carmina V. (2011) Effect of catharanthus pusillus (Tiny Periwinkle) in the Mitotic activity of Allium cepa. Undergraduate thesis, De La Salle University-Dasmarinas.

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The Effect of Catharanthus pusillus in the mitotic activity of Allium cepa, commonly known as onion was investigated. Root tips of Allium cepa were exposed with different concentrations (0.0%, 35%, 50%, and 75%) of Catharanthus pusillus crude extract. Treatment with Catharanthus pusillus crude extract lasted for two weeks. The root tips were harvested, fixed, squashed, stained, and observed using a binocular microscope. The rate of cell division was examined by means of determining the mitotic index. Mitotic index is obtained by dividing the number of cells undergoing mitosis over the total number of cells in a given population. The control (T0) has the highest value of mitotic indices which is 94% in first replicate (R1) while it has 91% in second replicate (R2). T1 got 8% in R1 and 7% in R2, T2 is 39% in R1 while 42% in R2 and T3 has a value 70% in R1 and 65% in R2. All the treatments revealed a significant increase in the mitotic index.

Item Type: Thesis (Undergraduate)
Additional Information: BIO 1160 2011
Keywords: Mitotic activity ; Allium cepa
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QK Botany
Q Science > QL Zoology
Users: College of Science and Computer Studies > Biological Science
Depositing User: Ivyjoy Viray
Date Deposited: 12 Nov 2015 07:15
Last Modified: 12 Nov 2015 07:15
URI: http://thesis.dlsud.edu.ph/id/eprint/543

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