Die Genetischen Grundlagen der Apomiktischen Fortpflanzung in der Gattung Potentilla

Christoff, M.; Papasova, G.

doi:10.1007/bf01847440

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…This type of reproduction was first observed in Potentilla by Miintzing (1928) and confirmed by a number of workers (Shimotomai, 1935;GentscheflF, 1938;Rutishauser, 1943a, b, c and1948;Christoff and Papasova, 1943;Smith, 1963a, h, and1971;Asker, 1966Asker, , 1970aAsker, , h and 1971. Smith (1963a, b) demonstrated that in P. cr ant zii ^nd P. tahernaemontani the function of the pollen nucleus is nutritive.…”

Section: Introductionsupporting

confidence: 59%

“…Observation that pseudogamic seed set in Potentilla can only be stimulated by pollen of a limited member of species have also been made by Christoff and Papasova (1943). They noted that only P. nepalensis and P. atrisanguinea were successful in stimulating apomictic seed set in P. argyrophylla.…”

Section: Discussionmentioning

confidence: 93%

“…Long, well-developed pollen tubes were observed after pollination by P. pennsylvanica, P. ambigens, P. reptans, P. anglica and P. anserina, whilst P. nepalensis, P. atrisanguinea and P. ereeta showed poor pollen germination and development. Microtome sections of carpels of P. erecta 7 days after pollination with P. pennsylvanica were compared with carpels after intraspecific pollination and after controlled emasculation without pollination, but the very slow development of the embryo sac and embryo in P. recta (previously reported by Christoff and Papasova, 1943) made meaningful comparisons impossible at this stage. In most carpels only archesporial cells were visible.…”

Section: Embryological Techniquementioning

confidence: 99%

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PSEUDOGAMY IN THE GENUS POTENTILLA L.

Goswami

Matfield

1974

New Phytologist

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SUMMARYThree closely related pseudogamic species, Potentilla argentea L., P. recta L. and P. cf. hirta L. were pollinated by other species of Potentilla and observations were made on pollen germination, pollen tube growth, ovule development and seed set. The three pseudogamic species stimulated seed set in each other, but no seeds were formed after pollination by ten other species although well-developed pollen tubes were observed in a number of cases. The offspring from the successful pollinations were mainly maternal but a few deviant individuals were also produced.

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Section: Introductionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 93%

Section: Embryological Techniquementioning

confidence: 99%

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PSEUDOGAMY IN THE GENUS POTENTILLA L.

Goswami

Matfield

1974

New Phytologist

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“…The same case is Potentilla atrosanguinea with 15 out of 22 studied seeds being clearly apomictic in Dobeš et al 55 , while all our samples were all sexual. Christoff & Papasova 60 also described P. atrosanguinea as a sexual, but his material came from botanical gardens, and so it is not directly comparable with our wild populations. Concerning reproduction modes of other sampled species which were unfortunately without clear signal, Rani et al 61 observed meiotic abnormality in Potentilla gelida in Western Himalayas, while another study by Jeelani et al 59 showed polyploidy in Potentilla sericea but no meiotic abnormalities.…”

Section: Resultsmentioning

confidence: 86%

Plant apomixis is rare in Himalayan high-alpine flora

Brožová

Koutecký

Doležal

2019

Sci Rep

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Gametophytic apomixis is a way of asexual plant reproduction by seeds. It should be advantageous under stressful high altitude or latitude environment where short growing seasons, low temperatures, low pollinator activity or unstable weather may hamper sexual reproduction. However, this hypothesis remains largely untested. Here, we assess the reproductive mode in 257 species belonging to 45 families from the world’s broadest alpine belt (2800–6150 m) in NW Himalayas using flow cytometric seed screen. We found only 12 apomictic species, including several members of Poaceae (Festuca, Poa and Stipa), Rosaceae (Potentilla) and Ranunculaceae (Halerpestes, Ranunculus), which are families typical for high apomict frequency. However, several apomictic species were newly discovered, including the first known apomictic species from the family Biebersteiniaceae (Biebersteinia odora), and first apomicts from the genera Stipa (Stipa splendens) and Halerpestes (Halerpestes lancifolia). Apomicts showed no preference for higher elevations, even in these extreme Himalayan alpine habitats. Additional trait-based analyses revealed that apomicts differed from sexuals in comprising more rhizomatous graminoids and forbs, higher soil moisture demands, sharing the syndrome of dominant species with broad geographical and elevation ranges typical for the late-successional habitats. Apomicts differ from non-apomicts in greater ability of clonal propagation and preference for wetter, more productive habitats.

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“…The Potentilla type assigned by GENTCHEFF to P. norvegica had 2n=70 and, obviously, a sexual reproduction. However, CHRISTOFF and PAPASOVA (1943) had to revise many classifications of Potentilla species in the Botanical Garden of the Agricultural Faculty of Sofia. This material had earlier been studied by POPOFF (1939) who still used erroneous names of several species.…”

Section: Discussionmentioning

confidence: 99%

Apomictic biotypes in Potentilla intermedia and P. norvegica

Asker

2009

Hereditas

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Material from localities in N. Scania, Sweden, was used in the present investigation. The chromosome number was 2n=56 in P. intermedia (as previously counted in Polish material) and 2n=70 in P. norvegica (as in many previous counts). Crossing experiments indicated pseudogamy in both species. Apomictic reproduction has been reported previously in P. intermedia, while P. norvegica has been supposed to be sexual. Embryologic studies gave evidence of obligate apospory in P. intermedia, while in P. norvegica some of the primary EMC:s undergo meiosis. In the latter species, partial sexuality is not quite excluded, although it reproduces mainly by apomixis. Meiosis on the male side is fairly irregular in P. intermedia while on the other hand P. norvegica has a quite regular bivalent formation, in spite of its high degree of polyploidy. P. intermedia is supposed to be of hybrid origin, being the result of crosses between P. argentea and P. norvegica. This remains to be proved experimentally, however, since crossing experiments between P. argentea and P. norvegica have so far failed to give any offspring.

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Die Genetischen Grundlagen der Apomiktischen Fortpflanzung in der Gattung Potentilla

Cited by 9 publications

References 10 publications

PSEUDOGAMY IN THE GENUS POTENTILLA L.

PSEUDOGAMY IN THE GENUS POTENTILLA L.

Plant apomixis is rare in Himalayan high-alpine flora

Apomictic biotypes in Potentilla intermedia and P. norvegica

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