A text-book of mycology and plant pathology . Fig. 51.—Slerigmatocystis nigcr {Aspergillus niger) showing conidiophores and coni-diospore formation with stages in germination of spores. {After Henri Coupin.) The genus Thielavia is represented by a common pathogenic species,T. basicola, whose life history and pathogenic character will be de- 150 MYCOLOGY scribed later. Il attacks the roots of a large series of plants includingthe tobacco, at least 105 species of plants being attacked according tothe latest account.^ The parasitic mycelium is intercellular, abun-dantly septate and hyaline. It pr
A text-book of mycology and plant pathology . Fig. 51.—Slerigmatocystis nigcr {Aspergillus niger) showing conidiophores and coni-diospore formation with stages in germination of spores. {After Henri Coupin.) The genus Thielavia is represented by a common pathogenic species,T. basicola, whose life history and pathogenic character will be de- 150 MYCOLOGY scribed later. Il attacks the roots of a large series of plants includingthe tobacco, at least 105 species of plants being attacked according tothe latest account.^ The parasitic mycelium is intercellular, abun-dantly septate and hyaline. It produces conidiospores, which areabjointed acrogenously from the conidiophore, and are not as wassupposed formerly endospores formed by free cell division within anendoconidial cell. The first conidiospore is liberated by the differentia-tion of its walls into an inner wall and a sheath and by the rupture ofthe latter at its apex. The later conidiospores grow out through thesheath of the first and are freed by a splitting of their basal wall
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Keywords: ., bookcentury1900, bookdecade1910, bookidtextbook, booksubjectfungi
