Microbiology
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

MICROBIOLOGY PowerPoint PPT Presentation


  • 54 Views
  • Uploaded on
  • Presentation posted in: General

MICROBIOLOGY. LECTURE:CYANOBACTERIA. 1. GENERAL CHARACTERISTICS. -THOUSANDS OF SPECIES -600 MILLION YRS. OLD, FOSSIL EVIDENCE -FORMERLY CALLED “BLUE-GREEN ALGAE. A. PROKARYOTE. -NO INTERNAL STRUCTURES -SMALL COMPARED TO EUKARYOTES

Download Presentation

MICROBIOLOGY

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Microbiology

MICROBIOLOGY

LECTURE:CYANOBACTERIA


1 general characteristics

1. GENERAL CHARACTERISTICS

-THOUSANDS OF SPECIES

-600 MILLION YRS. OLD, FOSSIL EVIDENCE

-FORMERLY CALLED “BLUE-GREEN ALGAE


A prokaryote

A. PROKARYOTE

-NO INTERNAL STRUCTURES

-SMALL COMPARED TO EUKARYOTES

-CELL FUNCTIONS OCCUR IN CYTOPLASM RESPIRATION MOSTLY NEAR CELL MEMBRANE

-


Microbiology

.

-CHEMICAL ANALYSIS: IDENTICAL TO PHOTO-SYNTHETIC BACTERIA, COMPLETELY DIFFERENT FROM EUKARYOTIC ALGAE


B nutrition

B. NUTRITION

-AUTOTROPHIC: CHLOROPHYLL CAN BE MANY COLORS, MOST COMMON SPECIES HAVE BLUE GREEN CHLOR. CONTAINING CYANIDE “FIX” NITROGEN: NO2 CONVERTED TO NH3 NATURAL SOURCE OF “NITROGEN” FOR PROTEINS


C morphology

C. MORPHOLOGY

-UNICELLULAR & IN FILAMENTS

-SOME HAVE GELATINOUS SHEATH (TOXIC?)

-NO FLAGELLA, BUT SOME CAN GLIDE

-COLOR PIGMENTS: CAROTENE, ERYTHRIN


Microbiology

.

-OIL BUBBLES: FOOD STORAGE & FLOTATION

-HETEROCYSTS: LOOK EMPTY BUT NITROGEN “FIXING”


Microbiology

ENDOSPORES: SURVIVAL TECHNIQUE


D habitat

D. HABITAT

-ANYPLACE WITH WATER AND LIGHT

-SPECIES ADAPTED TO ALL ENVIRONMENTS

-UNIQUELY RESISTANT TO EXTREMES OF pH, TEMPERATURE, CHEMICALS

-PRODUCE OIL WHICH FOULS LAKES, PONDS(PETROLEUM?), SMELLS VERY BAD

-SOME PRODUCE POISONS HARMING FISH & ANIMALS


E reproduction

E. REPRODUCTION

-ASEXUAL ONLY – BINARY FISSION


F examples

F. EXAMPLES

-POLYCYSTIS, GLEOCAPSA, OSCILLATORIA, NOSTOC, ANABENA & LYNGBYA


  • Login