Question

How does a small fragment develop into a mature filament in case of spirogyra????

Answer 1

During the growing season, the vegetative filament of Spirogyra undergoes fragmentation, so that each fragment independently develops into a new filament by repeated cell division and elongation. In favorable conditions, fragmentation is a most common method of multiplication. The fragmentation is caused by (i) mechanical injury (ii) dissolution of middle lamella (Hi) development of H-shaped pieces (e.g. in S. colligates).

Answer 2

the body of spirogyra has specialised cells that have the ability to grow, proliferate and make other types of cells that helps it to grow into a mature filament....
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