* DEHISCENCE OF ANTHER : the matuer paller sac, the pollen gerairs deny up are ocome perky, pouders The tapetem become absorbed and finally others dey up • The wall the pollen sac of on get desbayed. anther lobe Out 0 to this drying process the endothesion will contad as a result anther lobe ruption from the stomium and dispersal of pollen gerain takes place. - The micuaspere and pollen geot genuin are haploid, uninurliate, minute produced in lovege numb من • The poller gerain has two covering. outermest is Exing & made up of Sparepellinin) ad inner layer is intine Which is made made up of Rectors At one are mоrе messing an of pectorellulose. places, the exine is thin these places are called germ pore, through these germ pare poller tube comes out at the I germination on stigma time fate of peller gerair after doperser The ten goal pels collestin geain is ultimate to reach spedfic stigin to gunmivate and develop male gmetephyt → Microspore is the first call of the gavatophytic guration. cytoplasm are It haj centrally placed nuclay →Microspore nucleus divide mit inte two daughten ivide mitatically and two unequal cells are formed. The smaller Vegetative • The pollen grans are anthe at majarity. shed from the this bicelled staged in →After pollination the pollen grain stigma and obsan6 water after that they swell with in a few minutes and The vegetative (tube) cell enlarges in size to form pollen tube and the pollen tute is the extension of intine. →The pollen tobe enlarges 6/w the cells of stigma & style. The vegetative (tube) nucleus tube grat hes up into the pe to the • The generative cell me neucleus also migrate into the pallen tube and divide to form to two male gamete. * The tube nucleus has no importart function and may degenerate laten.