The effect of phosphorus on the filament morphology of the Gloeotrichia natans rabenh. ex. born. et flah.

Date

3-1989

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Milagrosa, R. Martinez

Abstract

Morphological differences were noted in G. natans as a response to the presence or absence of phosphorus. G. natans grown in phosphorus -rich meduim exhibited normal development., such as that the heterocysts were spherical and measured an average of 7 10 um in diameter. The cytoplasm of the heterocysts wan homogenous and pale green to near transparent in color. On the other hand , the cell wall was thick. The akinetes were elongated and the average measurements were 11.52um in width and 23.04 um in length. The cytoplasm of the akinetes wan very heterogenous, granular and brownish-green in color _ The cell wall was thick. The vegetative cells of the filaments were rectangular in shape. The average measurement were 5.50 um in width and 6.20 um in length. The cytoplasm was heterogenous and blue-green in color. The cell wall was relatively thick. The filaments grown in phosphorus-deficient medium exhibited heterocysts that were more triangular than spherical. The cytoplasm of the heterocysts wan slightly heterogenous and bluish - green in color. The cell wall was relatively thinner thaen the normal heterocysts. The filament of G. natans showed no visible signs of akinete development. The vegetative cells is G. natans were rectangular in shape and the average measurements were 4.70 um in width and 8.96 um in length. the cytoplasm was heterogenous and blue-green in color. The cell wall was relatively thinner compared to the normal vegetative cell.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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