Heterocyst frequency of two macrocolony forms of Nostoc commune Vaucher

Date

6-1993

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-Goss

Abstract

The discoid type was observed frequently in ponds with floodwater depth of about 1.8 cm. (range 1.0 - 2.5 cm.) and with rice plants. On the otherhand, the flat type was observed in desiccated or dried-up with no vegetation. Moisture content of the "D" type was 96.56% while that "F" type was 94.64% Microscopic observations showed the percent heterocyst frequency was higher in the "D" form (average of 8.46%) than in the "F" form (average of 4.64%). Filament length was likewise higher in the former type coverage of 25 cells/filament compared to the latter coverage of 14 cells/filament). the study showed that there was a direct relationship between the two macrocoloby forms of Nostoc Vauch. to its moisture content and its heterocyst frequency.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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