A text-book of mycology and plant pathology . the tip andstalk cells show this dif-erence, and their descendantsremain distinct with the pro-liferation of a new hook withstalk cell. The series of ac-companying figures takenfrom the paper by will enable thestudent to understand theprocess better than a lengthydescription. The antheridia andoogonia of SphcBrotheca ariseas lateral branches of neigh-boring mycelial oogonium is cut ofif fromthe rest of the hypha by atransverse septa, and pos-sesses a single nucleus. Theantheridial branch appearsquite near its base and grows
A text-book of mycology and plant pathology . the tip andstalk cells show this dif-erence, and their descendantsremain distinct with the pro-liferation of a new hook withstalk cell. The series of ac-companying figures takenfrom the paper by will enable thestudent to understand theprocess better than a lengthydescription. The antheridia andoogonia of SphcBrotheca ariseas lateral branches of neigh-boring mycelial oogonium is cut ofif fromthe rest of the hypha by atransverse septa, and pos-sesses a single nucleus. Theantheridial branch appearsquite near its base and growsupward pressed closely to theside of the oogonium. Theantheridial cell with onenucleus is also cut off by atransverse septum. This Fig. 38.—Diagrammatic representation of the j- -j 1 observed methods of Ascus formation. {After nucleus nOW divides and One Claussen, Zur Enlwicklungsgeschicle den Ascomy- q{ ^J^g |^^q j-juclei paSSeS intocelen, Pyronema conjluens, Zeitschr. fur Bolanik i 1 <? ^i 4 Jahrb., 1912.) the attenuated end 01 the. HIGHER FUNGI 125 antheridium, which is cut off by a partition wall. The wallsbetween the two organs are dissolved and the male nucleus passesthrough the opening formed wanders toward the egg nucleus withwhich it fuses. Immediately after fertilization, the oogonium beginssteady growth, and some of the outer cells formed become the cover
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Keywords: ., bookcentury1900, bookdecade1910, bookidtextbook, booksubjectfungi
