Morphology, Cytology and Development of &lt;i&gt;Melanotaenium brachiariae&lt;/i&gt;

Singh, Rajendra; Pavgi, M. S.

doi:10.1508/cytologia.38.455

Cited by 9 publications

(2 citation statements)

References 7 publications

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“…They reported, however, that this was not so for some other species of Entylorna that have been studied; meiosis occurs in the teliospore in E. rnicrosporurn and partly in the teliospore and partly in the promycelium in E. scirpicola (Thirumalachar and Dickson 1949). Meiosis may not even occur consistently at the same stage of germination in one species, e.g., in E. scirpicola meiosis sometimes took place entirely in the promycelium, and in Melanotaenium brachiariae (Singh and Pavgi 1973) meiosis normally took place in the promycelium but occasionally occurred in the spore. There are also varying reports for Tilletia caries, meiosis normally being described in the spore but also in the promycelium (Dastur 1921).…”

Section: Discussionmentioning

confidence: 97%

“…aschersoniana and E. casparyana) indicates that this mode of germination may be unique for the genus. On this basis there is no reason for following Thirumalachar and Whitehead's (1968) decision to include Entorrhiza under Melanotaenium, a genus where spore germination is completely different (Singh and Pavgi 1973;Zambettakis and Joly 1972). The mode of germination also confirms that Entorrhiza clearly belongs in the Tilletiaceae of the Ustilaginales.…”

Section: Discussionmentioning

confidence: 99%

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Teliospore germination in Entorrhiza casparyana (Ustilaginales)

Fineran

1982

Can. J. Bot.

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FINERAN, J. M. 1982. Teliospore germination in Entorrhiza casparyana (Ustilaginales). Can J . Bot. 60: 2903-2913.A study was made of teliospores of Entorrhiza casparyana (Magn.) Lagerh. germinating in situ in degenerating root galls of Juncus articulatus and in galls stored in liquid media at 7OC for 15 months. Teliospores germinating on agar were also examined. This is the first description of germination in this species. Teliospores germinated in situ and produced up to four aseptate promycelia each bearing up to four falcate sporidia, often distinctively looped or curved and in a terminal or subterminal position. On agar, teliospores germinated directly and formed septate branched hyphae but no sporidia. Karyokinesis occurred in the teliospores prior to germination. Division was presumed to be meiotic and to be followed by at least one mitosis. Cytokinesis followed, with up to four sectors being formed in a spore; this feature is described for the first time and appears to be unique to this genus. The mode of germination places Entorrhiza in the Tilletiaceae and also distinguishes it from Melanotaenium. The taxonomic position of the Ustilaginales is briefly discussed; the observations made so far on spore germination in E. casparyana support the retention of the Tilletiaceae in the Basidiomycetes. FINERAN, J. M. 1982. Teliospore germination in Entorrhiza casparyana (Ustilaginales). Can J . Bot. 60: 2903-2913.Les tCliospores de lYEntorrhiza casparyana ont Ct C CtudiCes pendant leur germination in situ dans des galles racinaires en dCgCnCrescence de Juncus articulatus et dans des galles entreposCes dans un milieu liquide i 7°C pendant 15 mois. Des tkliospores germant sur de la gClose ont aussi Ct C CtudiCes. Cet article constitue la premikre description de la germination chez cette espkce. Les tCliospores germent in situ et produisent jusqu'i quatre promycCliums non cloisonnCs; chaque promycClium porte, en position terminale ou subterminale, jusqu'i quatre sporidies falciformes qui sont souvent en forme de boucle ou recourbCes. Sur milieu gClosC, les tCliospores germent directement et forment des hyphes ramifiCs et cloisonnCs, mais aucune sporidie. La caryocinkse se produit dans les tCliospores avant la germination. On prisume que cette division est mCiotique et qu'elle est suivie par au moins une mitose. La cytocinkse suit etjusqu'i quatre secteurs se forment par spore; cette caractkristique est dCcrite pour la premikre fois et semble Etre unique a ce genre. Le mode de germination place le genre Entorrhiza parmi les Tellitiaceae et le distingue du genre Melanotaenium. La position taxonomique des Ustilaginales est brikvement discutCe; les observations effectuCes jusqu'i maintenant sur la germination des spores de 1'E. casparyana appuient la classification des Tilletiaceae parmi les Basidiomycktes.[Traduit par le journal]The genus Entorrhiza C. Weber (Ustilaginales) was erected by Weber (1884) to describe fungi producing root swellings, or galls, on some members of the Cyperaceae and Juncaceae. The teliospores a...

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%