Outlines of Meiosis in the Moss Genus Sphagnum

Sorsa, Veikko

doi:10.1111/j.1601-5223.1955.tb02994.x

Cited by 11 publications

(14 citation statements)

References 6 publications

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“…The best-growing clone 5.1 yielded significantly more biomass than clones 3.1, 5.3, 6.1 and 6.2, but 401 not significantly more than clone 4.6 ( Figure S5). All clones are haploid, which is consistent with the 402 literature (Bryan, 1955;Sorsa, 1955Sorsa, , 1956Temsch et al, 1998). 403…”

supporting

confidence: 87%

“…The best-growing clone 5.2 produced significantly more biomass than clones 1.1, 3.3, 3.4 and 407 5.1, but not significantly more than clone 1.4 ( Figure S6). All clones are haploid, which is consistent 408 with the literature (Bryan, 1955;Sorsa, 1955Sorsa, , 1956 Sphagnum fimbriatum (Section Acutifolia): Six clones were obtained from three sporophytes from 418 Sweden (1-2) and Latvia (6). The clones 1.1 and 2.1 were established by Beike et al (2015).…”

supporting

confidence: 81%

“…The best-growing clone 1.1 was significantly more productive than clones 421 2.1, 6.1 and 6.4, but not significantly more than clones 6.2 and 6.5 ( Figure S8). All clones are haploid, 422 which is consistent with Bryan (1955), Sorsa (1955Sorsa ( , 1956), Maass & Harvey (1973) and Temsch et al 423 (1998), but in contrast to Smith & Newton (1968). 424…”

supporting

confidence: 70%

“…Growth in suspension resulted in the same productivity for five clones, while clone 1.2 grew more than 385 twice as fast and yielded significantly more biomass ( Figure S2). All clones are haploid, which is 386 consistent with Sorsa (1955Sorsa ( , 1956. 387…”

mentioning

confidence: 79%

“…Latvia are haploid. S. fimbriatum was reported to be haploid in the USA (Bryan, 1955), Finland (Sorsa, 298 1955(Sorsa, 298 , 1956), Canada (Maass & Harvey, 1973) 1973), whereas diploid specimens were reported from Finland (Sorsa, 1955(Sorsa, , 1956. 305…”

mentioning

confidence: 99%

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Axenicin-vitrocultivation of nineteen peat-moss (SphagnumL.) species as a resource for basic biology, biotechnology and paludiculture

Heck

Lüth

Krebs

et al. 2020

Preprint

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Axenic in-vitro cultivation of nineteen peat-moss (Sphagnum L.) species as a resource for basic 1 biology, biotechnology and paludiculture 2 Summary 27  The cultivation of Sphagnum mosses reduces CO2 emissions by rewetting drained peatlands 28 and by substituting peat with renewable biomass. 'Sphagnum farming' requires large volumes 29 of founder material, which can only be supplied sustainably by axenic cultivation in 30 bioreactors. 31  We established axenic in-vitro cultures from sporophytes of 19 Sphagnum species collected in 32 Austria, Germany, Latvia, Netherlands, Russia and Sweden, namely S. angustifolium, 33 S. balticum, S. capillifolium, S. centrale, S. compactum, S. cuspidatum, S. fallax, S. fimbriatum, 34 S. fuscum, S. lindbergii, S. medium/divinum, S. palustre, S. papillosum, S. rubellum, S. russowii, 35 S. squarrosum, S. subnitens, S. subfulvum, and S. warnstorfii. These species cover five of the 36 six European Sphagnum sections, namely Acutifolia, Cuspidata, Rigida, Sphagnum and 37 Squarrosa. 38  Their growth was measured in axenic suspension cultures, whereas their ploidy was 39 determined by flow cytometry and compared with the genome size of Physcomitrella patens. 40We identified haploid and diploid Sphagnum species, found that their cells are predominantly 41 arrested in the G1-phase of the cell cycle, and did not find a correlation between plant 42 productivity and ploidy. 43  With this collection, high-quality founder material for diverse large-scale applications but also 44 for basic Sphagnum research is available from the International Moss Stock Center (IMSC). 45 46

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supporting

confidence: 87%

supporting

confidence: 81%

supporting

confidence: 70%

mentioning

confidence: 79%

mentioning

confidence: 99%

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Axenicin-vitrocultivation of nineteen peat-moss (SphagnumL.) species as a resource for basic biology, biotechnology and paludiculture

Heck

Lüth

Krebs

et al. 2020

Preprint

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The Question of Post‐reduction in Sphagnum

Bryan

1966

American J of Botany

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The 19 spatially distinct chromosomal units at first meiotic metaphase in sporophytically diploid species of Sphagnum have usually been considered to be bivalents, but one investigator (Sorsa, 1956) has interpreted them as chromosomes from dissociated bivalents and meiosis as post‐reductional. The present studies on diploid S. squarrosum (Pers.) Crome establish the chromosome number on the basis of the following evidence: there are in addition to m‐chromosomes, 19 pairs of chromosomes in early prophase, 19 bivalents at diakinesis, 19 chromosomes in each of the two sets at second metaphase, 19 daughter chromosomes in each of the four sets at late second anaphase, and 19 chromosomes in gametophytic mitoses. The 19 bodies at first meiotic metaphase in diploid species are true bivalents in loose secondary association, which has led to their erroneous interpretation as chromosomes of dissociated bivalents. The gametic chromosome number in sporophytically diploid Sphagnum is therefore, without doubt, n = 19, and this evidence negates the claim for post‐reduction in Sphagnum.

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Cytogenetik

Straub¹

1958

Progress in Botany

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Outlines of Meiosis in the Moss Genus Sphagnum

Cited by 11 publications

References 6 publications

Axenicin-vitrocultivation of nineteen peat-moss (SphagnumL.) species as a resource for basic biology, biotechnology and paludiculture

Axenicin-vitrocultivation of nineteen peat-moss (SphagnumL.) species as a resource for basic biology, biotechnology and paludiculture

The Question of Post‐reduction in Sphagnum

Cytogenetik

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