Response of Nostoc Commune vauch. to varying concentrations of calcium

Date

4-1993

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Milagrosa R. Martinez

Abstract

PABALAN, LARISSA HESO. University of the Philippines, Los Banos, March 1993. Response of Nostoc commune Vauch. to Varying Concentrations of Calcium.

ADVISER: Dr. Milagrosa R. Martinez

The effect of calcium at varying concentrations from 0 to 25,000 mg/ 1 in the basal inorganic medium (PG 11 minus N) was studied on the growth and cellular morphological development of the diazotrophic blue-green alga, Nostoc commune Vauch, is vitro. Growth evaluations were made on chlorophyll content, protein content and biomass accumulation while the cellular morphology was evaluated based on percent heterocyst and percent dividing cells. Biomass accumulation and chlorophyll content were highest at 40.0 mg/1 Ca while the acetylene reduction activity and protein content were observed to be highest in Ca concentrations of 5.0 and 5000 mg/1, respectively. Three general forms of N. commune were observed, namely, asseriate colony, heterocystous and short-non-heterocystous. Mucilagenous sheath was observed, which could be as much as 17 um, at concentrations from C) to 50)) mg/ml Ca except for the normal Ca concentration (10 mg/ml Ca).

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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