. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 124 MYCOLOGY cell may proliferate a new hook with penultimate, tip and stalk cells and this another, and during this process of proliferation, the nuclei derived by descent from the antheridial nuclei remain distinct from those of the ascogonium (carpogo- nium). Even the two nuclei derived from the tip and stalk cells show this dif- erence, and their descendants remain distinct with the pro- liferation of a new hook with stalk cell. The series of ac- companying figures taken from the pa
. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 124 MYCOLOGY cell may proliferate a new hook with penultimate, tip and stalk cells and this another, and during this process of proliferation, the nuclei derived by descent from the antheridial nuclei remain distinct from those of the ascogonium (carpogo- nium). Even the two nuclei derived from the tip and stalk cells show this dif- erence, and their descendants remain distinct with the pro- liferation of a new hook with stalk cell. The series of ac- companying figures taken from the paper by P. Claussen will enable the student to understand the process better than a lengthy description. The antheridia and oogonia of Sphcerotheca arise as lateral branches of neigh- boring mycelial filaments. The oogonium is cut off from the rest of the hypha by a transverse septa, and pos- sesses a single nucleus. The antheridial branch appears quite near its base and grows upward pressed closely to the side of the oogonium. The antheridial cell with one nucleus is also cut off by a „. ,. , transverse septum. This —Diagrammatic representation of the j- -j observed methods of Ascus formation. (Afler nucleus now divides and One Claussen, Zur Enlwicklungsgeschicle den Ascomy- q{ ^Jjg ^^q mjclgj nasses into celen, Pyronema conjluens, Zeilschr. fur Bolanik 4 Jahrb., 1912.) the attenuated end of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harshberger, John W. (John William), 1869-1929. Philadelphia : P. Blakiston's Son & Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1917
