o The second species show significant difference.
o The “ring” laid down in the single_celled germiling, and sometimes in the apical cell of a two_celled filament covered the whole apical end wall;the basal cell also usually underwent one more division,utilizing a normal ring.
o It is suggested that the formation of rings of cell division represents adaption of a wound_response mechanism, brought into action by the deliberate creation of the circumferential weakning in the apical cell wall,and a concurent increase in the cell turgor.