Multiperforate Septa in Lichens

Wetmore, Clifford M.

doi:10.1111/j.1469-8137.1973.tb04404.x

Cited by 13 publications

(6 citation statements)

References 10 publications

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“…In some lichens fungal septa are known to be multiperforate, and the idea has already been advanced that this might facilitate symplastic nutrient movement (e.g. Wetmore, 1973). It is argued here that the most likely mechanism for $$P translocation is active and symplastic by nature (i.e.…”

Section: mentioning

confidence: 93%

³³P translocation in the thallus of the mat‐forming lichen Cladonia portentosa

Hyvärinen

Crittenden

2000

New Phytologist

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The extent of vertical migration of $$P in thalli of the heathland lichen Cladonia portentosa was investigated under field conditions. $$P-labelled orthophosphate was introduced into the bottom 25 mm of podetia cut to a length of 50 mm from the apices. The distribution of label was scanned using a molecular imager immediately after incubation, and after growing for 8 wk and 6 months. Differences in the relative distribution of label between podetia harvested at the beginning and the end of the experiment showed that there had been a significant migration of $$P upwards out of the labelled 25 mm stratum towards the apex. This was confirmed by statistically significant changes in the median (md) and the 90 percentile of total relative distribution of $$P label. In a control treatment in which label was introduced into the apical 25 mm of podetia, which were then grown inverted (top down), no upward movement of label was detected. By contrast, a statistically significant reduction in the md of the distribution indicated migration downwards towards the thallus apex. The results are consistent with the hypothesis that P is recycled within podetia of mat-forming lichens, migrating from degrading basal regions upwards to the growing apices following a source-sink relationship.

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Section: mentioning

confidence: 93%

³³P translocation in the thallus of the mat‐forming lichen Cladonia portentosa

Hyvärinen

Crittenden

2000

New Phytologist

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“…Plasmodesmata are present in some Zygomycota and Ascomycota (Fig. 6), while taxa in several classes of filamentous ascomycetes and one basidiomycete taxon possess multiperforate septa (not illustrated; Reichle and Alexander, 1965;Wetmore, 1973;Doublés and McLaughlin, 1991).…”

Section: Revision Of Septal Features Of Fungi-mentioning

confidence: 97%

Assembling the fungal tree of life: progress, classification, and evolution of subcellular traits

Lutzoni

Kauff

Cox

et al. 2004

American J of Botany

729

436

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Based on an overview of progress in molecular systematics of the true fungi (Fungi/Eumycota) since 1990, little overlap was found among single-locus data matrices, which explains why no large-scale multilocus phylogenetic analysis had been undertaken to reveal deep relationships among fungi. As part of the project "Assembling the Fungal Tree of Life" (AFTOL), results of four Bayesian analyses are reported with complementary bootstrap assessment of phylogenetic confidence based on (1) a combined two-locus data set (nucSSU and nucLSU rDNA) with 558 species representing all traditionally recognized fungal phyla (Ascomycota, Basidiomycota, Chytridiomycota, Zygomycota) and the Glomeromycota, (2) a combined three-locus data set (nucSSU, nucLSU, and mitSSU rDNA) with 236 species, (3) a combined three-locus data set (nucSSU, nucLSU rDNA, and RPB2) with 157 species, and (4) a combined four-locus data set (nucSSU, nucLSU, mitSSU rDNA, and RPB2) with 103 species. Because of the lack of complementarity among single-locus data sets, the last three analyses included only members of the Ascomycota and Basidiomycota. The four-locus analysis resolved multiple deep relationships within the Ascomycota and Basidiomycota that were not revealed previously or that received only weak support in previous studies. The impact of this newly discovered phylogenetic structure on supraordinal classifications is discussed. Based on these results and reanalysis of subcellular data, current knowledge of the evolution of septal features of fungal hyphae is synthesized, and a preliminary reassessment of ascomal evolution is presented. Based on previously unpublished data and sequences from GenBank, this study provides a phylogenetic synthesis for the Fungi and a framework for future phylogenetic studies on fungi.

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“…Gametangial septa in the Zygomycota are commonly multiperforate (Hawker andGooday, 1966, 1967;O'Donnell, Hooper, and Fields, 1976;O'Donnell et aI., 1977b;Gibson, Kimbrough, and Benny, 1986), and vegetative septa may also be multiperforate (O'Donnell et aI., I 977a;Jeffries and Young, 1983). Multipored septa occur in the medullary hyphae ofa number oflichenized ascomycete genera (Wetmore, 1973). Septa in hyphae of Fusarium spp.…”

Section: Discussionmentioning

confidence: 99%

“…The typical basidiomycete and ascomycete septum is perforated by a single, central pore, and the functional significance ofthe relatively uncommon multiperforate septum is unclear. Wetmore (1973) hypothesized that multiple pores in lichens may improve translocation of water and nutrients. Similarly, Reichle and Alexander (1965) suggested that improved translocation might be advantageous in Fusarium.…”

Section: [Vol 78mentioning

confidence: 99%

A New Basidiomycetous Septal Type: The Multiperforate Septum in Kriegeria Eriophori

Doubles

McLaughlin

1991

American J of Botany

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Septa from metabasidia and clamp connections of the heterobasidiomycetous sedge parasite Kriegeria eriophori were studied with light and electron microscopy. Septa from clamp connections subtending pro basidia were reconstructed from serial sections. Septa at clamp connections are perforated by multiple, simple pores, while metabasidial septa possess single, central swellings which probably represent pores occluded by wall material. The occurrence of multiperforate septa in the fungi is reviewed. The septal morphology of K. eriophori is compared to that of simple-septate heterobasidiomycetes, and the systematic and functional implications are discussed.

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Multiperforate Septa in Lichens

Cited by 13 publications

References 10 publications

³³P translocation in the thallus of the mat‐forming lichen Cladonia portentosa

³³P translocation in the thallus of the mat‐forming lichen Cladonia portentosa

Assembling the fungal tree of life: progress, classification, and evolution of subcellular traits

A New Basidiomycetous Septal Type: The Multiperforate Septum in Kriegeria Eriophori

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Multiperforate Septa in Lichens

Cited by 13 publications

References 10 publications

33P translocation in the thallus of the mat‐forming lichen Cladonia portentosa

33P translocation in the thallus of the mat‐forming lichen Cladonia portentosa

Assembling the fungal tree of life: progress, classification, and evolution of subcellular traits

A New Basidiomycetous Septal Type: The Multiperforate Septum in Kriegeria Eriophori

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³³P translocation in the thallus of the mat‐forming lichen Cladonia portentosa

³³P translocation in the thallus of the mat‐forming lichen Cladonia portentosa