<i>Intrapes</i>, A New Genus of Fungi Imperfecti (Uredinales) from Brazilian Cerrado

Hennen, Joe F.; Figueiredo, M. B.

doi:10.1080/00275514.1979.12021079

Cited by 6 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Buriticá and Hennen 1994;Hennen and Figueiredo 1979;de Carvalho and Hennen 2010;Salazar Yepes et al 2007). As a consequence, many named Uredo spp.…”

Section: Endemism and Phylogenetic Diversity Of Neotropical Rust Fungimentioning

confidence: 92%

Species richness, taxonomy and peculiarities of the neotropical rust fungi: are they more diverse in the Neotropics?

Berndt

2012

Biodivers Conserv

View full text Add to dashboard Cite

The species richness of rust fungi (Pucciniales or Uredinales) in the neotropics is reviewed. Species numbers are presented for all neotropical countries and rust-plantratios calculated. It is discussed whether the ratio for a given region can be explained by the species richness of vascular plants alone or whether it is caused by additional factors. In the first case, ratios should apply globally and vary only slightly; in the second case, more diverging ratios are expected. Observed ratios ranged between 1:16 and 1:124 in the neotropics. The large differences are certainly influenced by unequal levels of investigation, rendering interpretation difficult. Differences seem also to be influenced by the taxonomic composition of floras regarding the percentage of host families or genera bearing different numbers of rust species. This indicates that rust species richness is not driven solely by plant species richness. Ratios calculated for Switzerland, Austria and Japan are distinctly higher than for the neotropics indicating that certain temperate regions are proportionally richer in rust fungi than the neotropics. Uredinial states and short-cycled rust species prevail in the neotropics. The preponderance of uredinial states may be due to the heterogeneous spatial composition of certain vegetation types in the wet tropics. Shortcycled rusts may be adapted to a pronounced seasonality that can be encountered in many drier neotropical biomes. Future research needs to fill our knowledge gaps on the taxonomy and ecology of neotropical rust fungi are discussed.

show abstract

“…Buriticá and Hennen 1994;Hennen and Figueiredo 1979;de Carvalho and Hennen 2010;Salazar Yepes et al 2007). As a consequence, many named Uredo spp.…”

Section: Endemism and Phylogenetic Diversity Of Neotropical Rust Fungimentioning

confidence: 92%

Species richness, taxonomy and peculiarities of the neotropical rust fungi: are they more diverse in the Neotropics?

Berndt

2012

Biodivers Conserv

View full text Add to dashboard Cite

show abstract

“…The persistent pedicels of successive urediospores form a distinct collar around the base of the developing urediospore at the apex of its pedicel (Rajendren 1970). Observations by Hennen and Figueiredo (1979) revealed that in their newly described genus Intrapes, collars formed on the distal end of the basal cell after successive generations of urediospores. Transmission electron microscopy by Rey and Garnett (1983) showed that, during urediosporogenesis of Puccinia digitariae, collars are formed from pedicels that were split either at the apex or laterally.…”

Section: Introductionmentioning

confidence: 97%

“…Later, interest focused on specific aspects of urediosporogenesis (Harder 1976;Hassan and Littlefield 1979;Hennen and Figueiredo 1979;Littlefield and Heath 1979;Muller et al 1974;Rajendren 1970;Rey and Garnett 1983;Spiers and Hopcroft 1985).…”

Section: Introductionmentioning

confidence: 99%

“…Pedicel (Harder 1976;Hassan and Littlefield 1979;Hawksworth et al 1983;Hennen and Figueiredo 1979;Spiers and Hopcroft 1985) is synonymous with "a small stalk" (Hawksworth er al. 1983) or sporophore (Miiller et al 1974;Rey and Garnett 1983).…”

mentioning

confidence: 99%

“…The collar (Blackman 1904;Heath and Bonde 1983;Hennen and Figueiredo 1979;Olive 1944;Rajendren 1970;Rey and Garnett 1983) is the wall of a pedicel, which remains attached to the basal cell upon urediospore secession and through which the subsequent urediospore initial develops.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Ultrastructural morphology of the uredium and collar formation during urediosporogenesis of Uromyces transversalis on gladiolus

Ferreira¹,

Rijkenberg²

1990

Can. J. Bot.

View full text Add to dashboard Cite

1990. Ultrastructural morphology of the uredium and collar formation during urediosporogenesis of Uromyces transversalis on gladiolus. Can. J . Bot. 68: 605412. The transverse uredia of Uromyces transversalis on gladiolus leaves were investigated by scanning and transmission electron microscopy. The basal cell forms one or more protuberances distally, each being delimited by a septum to become a urediospore initial. The initial elongates and lays down a septum to form a urediospore and pedicel. The first protuberance on the basal cell forms holoblastically, and evidence is found at the same locus for the subsequent enteroblastic formation of up to three successive urediospore initials. The pedicel wall of a spore thus formed remains on the basal cell and becomes a collar around the next protuberance. The basal layer of the two-layered septum that delimited the pedicel from the basal cell grows out to form the wall of the subsequent protuberance, and in the process ruptures and laterally displaces the terminal septa1 layer. A new basipetal septum forms to delimit the subsequent urediospore initial. In this manner, several collars form retrogressively and concentrically at one locus. FERREIRA. J. F., et RIJKENBERG, F. H. J. 1990. Ultrastructural morphology of the uredium and collar formation during urediosporogenesis of Uromyces transversalis on gladiolus. Can. J. Bot. 68 : 605412. Les auteurs ont CtudiC, B I'aide de la microscopic Clectronique par balayage et par transmission, 1'Uromyces transversalis venant sur feuilles de glayeul. La cellule basale forme une ou plusieurs protuberances en position distale, chacune ttant dtlimitte par un septum avant de devenir I'initiale de l'urediospore. La cellule initiale s'allonge et depose un septum pour former une urediospore et un pkdicelle.La premibre protuberance sur la cellule basale se forme de fason holoblastique et au mCme lieu on peut trouver la preuve de la formation enttroblastique subsequente, allant jusqu'B trois initiales d'urediospore successives. La paroi du ptdicelle de la spore ainsi formte demeure sur la cellule basale et devient un collier autour de la protuberance suivante. La couche basale constitute par le septum B deux couches, qui delimite le ptdicelle de la cellule basale, s'accroit pour former la paroi de la protubtrance subskquente; au cours de ce processus, il y a rupture et deplacement lattral de la couche septale terminale. Un nouveau septum basipbte se forme pour delimiter I'initiale de l'urediospore subsequente. De cette manikre, plusieurs colliers se foment de fason retrogressive et concentrique sur un meme lieu.[Traduit par la revue]

show abstract