VEGETATIVE STRUCTURE AND ANATOMY OF NOSTOC
OCCURRENCE OF NOSTOC
* IT IS FILAMENTS FROM OF BOTH TERRESTRIAL AND AQUATIC HABITAT.
* IT DOES NOT OCCUR IN SIMPLE FILAMENT BUT GROW IN LARGE COLONY OF CLOSELY PACKED TRICHOME.
* THE TRICOME ARE EMBEDDED IN MATRIX GILATINOUS BACTERIA.
* THE THALI ARE UP OF VARIOUS SIZE AND SHAPE AND MAY BE SOLID OR HOLLOW.
* IT SIZE THEY ARE MICROSCOPIC P-SIZE OR AS LARGE AS PLUMB.
* THE COLOR MAY BE OLIVE GREEN OR BLUE GREEN.
STRUCTURE OF THE COLONY
* THE CHAINS OF THE TRICOME OF VARYING LENGTH OF TANGELED IN GILATINOUS MATRIX TO FORM A COLONY.
* EACH TRICOME IS USUALLY ENCLOSED BY IT S OWN MUCILAGINOUS SEATH AN IS CALLED AS FILAMENT.
* EACH COLONY APPEARS LIKEN BLUISH GREEN OR YELLOW MASS IN JELLY.
* YOUNG COLONY ARE SMALL AND MICROSCOPIC BUT THE MATURE ON LARGE.
STRUCTURE OF THE TRICHOME
* TRICOME ARE MORE CROWDED TOWARDS THE PERIFERI OF THE COLONY TO FORM A DENCE LIMIT LAYER.
* EACH TRICOME IS COMPOSED OF NUMEROUS ROUND OR OVAL SHAPED.
* THE CELL ARE JOINT LOSSLY FROM END TO END INTO A TRICHOME.
* AT FREQUENT INTERVAL IN THYE TRICOME SOME COLORLESS , EMPTY SPHERICALOR BARREL SHAPED CELL ARE PRESENT CALLED THE HETEROCYSTS.
* THE HETEROCYST ARE SLIGHTLY LARGE AND HAVE THICK WALLS THAN THE VEGETATIVE CELL.
THEY ARE INTERCALARY IN POSITION BUT SOME TIME TERMINAL .
* EACH INTERCALARY HETEROCYST CONTAINS TWO POLAR PORES.
* THROUGH THESE SPORES THE CYTOPLASMIC CONNECTION ARE MAINTAIN WITH THE ADJACENT VEGETATIVE CELL.
UNDER CERTAIN CONDITION THE VEGETATIVE CELL PRESENT ARE THERE IN THE TRICOME MAY BECOME GREATLY ENLARGED STORED WITH FOOD METERIAL CALLED THE AKIN ATES .
EACH TRICHOME WITH IT INDIVIDUAL SEATH IS CALLED THE FILAMENT .
* THE SEATH MAY BE HY LINE IN COLOR.
OCCURRENCE OF NOSTOC
* IT IS FILAMENTS FROM OF BOTH TERRESTRIAL AND AQUATIC HABITAT.
* IT DOES NOT OCCUR IN SIMPLE FILAMENT BUT GROW IN LARGE COLONY OF CLOSELY PACKED TRICHOME.
* THE TRICOME ARE EMBEDDED IN MATRIX GILATINOUS BACTERIA.
* THE THALI ARE UP OF VARIOUS SIZE AND SHAPE AND MAY BE SOLID OR HOLLOW.
* IT SIZE THEY ARE MICROSCOPIC P-SIZE OR AS LARGE AS PLUMB.
* THE COLOR MAY BE OLIVE GREEN OR BLUE GREEN.
STRUCTURE OF THE COLONY
* THE CHAINS OF THE TRICOME OF VARYING LENGTH OF TANGELED IN GILATINOUS MATRIX TO FORM A COLONY.
* EACH TRICOME IS USUALLY ENCLOSED BY IT S OWN MUCILAGINOUS SEATH AN IS CALLED AS FILAMENT.
* EACH COLONY APPEARS LIKEN BLUISH GREEN OR YELLOW MASS IN JELLY.
* YOUNG COLONY ARE SMALL AND MICROSCOPIC BUT THE MATURE ON LARGE.
STRUCTURE OF THE TRICHOME
* TRICOME ARE MORE CROWDED TOWARDS THE PERIFERI OF THE COLONY TO FORM A DENCE LIMIT LAYER.
* EACH TRICOME IS COMPOSED OF NUMEROUS ROUND OR OVAL SHAPED.
* THE CELL ARE JOINT LOSSLY FROM END TO END INTO A TRICHOME.
* AT FREQUENT INTERVAL IN THYE TRICOME SOME COLORLESS , EMPTY SPHERICALOR BARREL SHAPED CELL ARE PRESENT CALLED THE HETEROCYSTS.
* THE HETEROCYST ARE SLIGHTLY LARGE AND HAVE THICK WALLS THAN THE VEGETATIVE CELL.
THEY ARE INTERCALARY IN POSITION BUT SOME TIME TERMINAL .
* EACH INTERCALARY HETEROCYST CONTAINS TWO POLAR PORES.
* THROUGH THESE SPORES THE CYTOPLASMIC CONNECTION ARE MAINTAIN WITH THE ADJACENT VEGETATIVE CELL.
UNDER CERTAIN CONDITION THE VEGETATIVE CELL PRESENT ARE THERE IN THE TRICOME MAY BECOME GREATLY ENLARGED STORED WITH FOOD METERIAL CALLED THE AKIN ATES .
EACH TRICHOME WITH IT INDIVIDUAL SEATH IS CALLED THE FILAMENT .
* THE SEATH MAY BE HY LINE IN COLOR.
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