Self-Sterility and Cryptic Self-Fertility in Campsis radicans (Bignoniaceae)

Bertin, Robert I.; Barnes, Christy; Guttman, Sheldon I.

doi:10.1086/337785

Cited by 41 publications

(34 citation statements)

References 15 publications

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“…(ii) autofertilidade críptica verificada por Bertin et al (1989) e Bertin & Sulivan (1988), na qual um número mínimo de óvulos fertilizados com pólen exógeno permite a manutenção e o desenvolvimento de frutos. Portanto, estes frutos também contém óvulos autofertilizados;…”

Section: Sementesunclassified

“…(iii) autoesterilidade como resultado do sistema de autoincompatibilidade de ação tardia ou depressão endogâmica (Bertin et al 1989); (iv) quantidade de pólen depositada no estigma; este aspecto, bem como a ocorrência de autofertilidade críptica, não foi controlado neste estudo. Contudo, houve acentuada produção de frutos derivados de polinização cruzada manual, ao passo que a falência dos pistilos autopolinizados ocorreu após a penetração dos tubos na micrópila dos óvulos e em tempos não sincrônicos.…”

Section: Sementesunclassified

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Polinização de Cambessedesia hilariana (Kunth) DC. (Melastomataceae): sucesso reprodutivo versus diversidade, comportamento e freqüência de visitas de abelhas

Fracasso

Sazima

2004

Rev. bras. Bot.

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-(Pollination of Cambessedesia hilariana (Kunth) DC. (Melastomataceae): reproductive success versus bee diversity, behaviour and frequency of visits). The reproductive phenology, pollination biology and reproductive system of Cambessedesia hilariana were studied in a population occurring on rocky outcrops at Vinhedo, São Paulo State, southeastern Brazil. This species presents a flowering peak between October and December with high daily flower production. Anthesis begins at 7:00 h with slow petal separation, followed by grouping of the reproductive elements in the inferior part of the flower. The only resource is pollen, which is collected by the bees through buzz pollination. The stigma is receptive and the pollen viable for up to 60 hours. Fruit-set under natural conditions (70%) is similar to that from hand crosses (74%), but higher than fruit-set from selfed flowers (12.5%). There was no indication that self incompatibility reactions are present during pollen tube growth. The main pollinators are Bombus morio, Centris sp., Centris cf. nitens, Euglossa cordata and Xylocopa sp. The most frequent visitor is Centris sp. (50.71%), but its visits resulted in lower fruit-and seed-set than those of the other bee species. High fruit-and seed-set in C. hilariana seem to be related to bee diversity, pollinator foraging behaviour at the flowers and ability to carry pollen, frequency throughout the flowering period, as well as to the reproductive system which favours xenogamy.Key words -Cambessedesia, diversity and behaviour, floral biology, melittophily, reproductive success RESUMO -(Polinização de Cambessedesia hilariana (Kunth) DC. (Melastomataceae): sucesso reprodutivo versus diversidade, comportamento e freqüência de visitas de abelhas). A fenologia reprodutiva, a biologia da polinização e o sistema de reprodução de Cambessedesia hilariana foram estudados em uma população rupícola em Vinhedo, São Paulo, sudeste do Brasil. Essa espécie apresenta pico de floração entre outubro e dezembro, com alta produção de flores por dia. A antese se inicia por volta das 7:00 h com o afastamento das pétalas, seguida pela disposição em grupo dos elementos reprodutivos na parte inferior da flor. O recurso disponível é o pólen, liberado por vibrações realizadas pelas abelhas. O estigma é receptivo e o pólen é viável, ambos durante cerca de 60 horas. A frutificação em condições naturais (70%) assemelha-se à obtida por meio de polinizações cruzadas manuais (74%) sendo maiores que as porcentagens obtidas em flores autopolinizadas manualmente (12,5%), porém não há indícios de reações de autoincompatibilidade nos tubos polínicos. Os principais polinizadores são Bombus morio, Centris sp., Centris cf. nitens, Euglossa cordata e Xylocopa sp. O visitante mais freqüente é Centris sp. (50,71%), contudo suas visitas resultam nas menores taxas de formação de frutos e sementes quando comparadas às taxas resultantes de visitas das outras espécies de abelhas. Altas taxas de frutificação e formação de sementes em C. hilariana parecem estar re...

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Section: Sementesunclassified

Polinização de Cambessedesia hilariana (Kunth) DC. (Melastomataceae): sucesso reprodutivo versus diversidade, comportamento e freqüência de visitas de abelhas

Fracasso

Sazima

2004

Rev. bras. Bot.

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“…The relative weight of both mechanisms, self-incompatibility and inbreeding depression, has been analyzed for some species such as Amsinckia grandiflora by Ornduff (1989, 1991 ); Amsinckia douglasiana by Casper et al (1988); Campsis radicans by Bertin et al (1989) or Aguilegia caerarlea by Montalvo (1992).…”

mentioning

confidence: 99%

Self- and cross-pollination effects on pollen tube growth and seed set in holm oak Quercus ilex L (Fagaceae)

Yacine

Bouras

1997

Ann. For. Sci.

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Summary -Patterns of the self-incompatibility system have been more often described for hermaphroditic, entomophilous and short-lived plant species. Quercus ilex is a long-lived, monoecious, anemophilous and highly self-incompatible species. We used pollination experiments to investigate phenotypic responses of the self-incompatibility system. Flowers from 14 individuals of the same stand were hand-pollinated with self-pollen, cross-pollen from a single donor and a mixture of the two types. We observed a slower pollen tube growth and no or nearly no seed production after self-pollination. The more self-pollen tubes reach the style, the more flowers will stop their ovule development, resulting in a high flower abortion rate. In open pollination, pollen load is not a limiting factor, but incompatible pollen may reach stigma simultaneously or before compatible cross-pollen, which will induce an early abortion of flowers. When pollination is qualitatively and quantitatively effective, the regulation of seed production related to the resources availability acts by the late abortion of fruit.self-incompatibility / pollen tube growth / seed set / Quercus ilex L Résumé -Effets de l'auto-et de l'allopollen sur la croissances des tubes polliniques et la production de fruits chez le chêne vert (Quercus ilex L). Les

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“…This contradicts previous studies that have shown the species to be self-sterile in the study area. Facultative selfing has been reported in other species that exhibit self-incompatibility or self-sterility (eg, Bertin et al, 1989;Becerra and Lloyd, 1992). For example, Phormium tenax exhibits cryptic self-incompatibility, but selffertilises when cross-pollination is limited (Becerra and Lloyd, 1992).…”

Section: Discussionmentioning

confidence: 99%

Mating system and population genetic structure of an androdioecious tree, Fraxinus lanuginosa Koidz. (Oleaceae) in northern Japan

Ishida

Hiura

2002

Heredity

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Models for the maintenance of androdioecy have suggested that selfing of hermaphrodites decreases the frequency of males in a population (the 'male frequency'). To test this hypothesis, we used electrophoretic allozyme methods to study the mating system and population genetics of an androdioecious tree, Fraxinus lanuginosa, which exhibits large variations in male frequency among subpopulations in central Hokkaido (northern Japan). We estimated the outcrossing rates by using seeds assayed at three polymorphic loci, and found that the multilocus outcrossing rate (t m ) increased with increasing male frequency (q) (t m = 0.69 to 0.99, q = 0.11 to 0.59). Fixation indices (F j ) estimated from these t m values ranged from 0.006 to 0.185, and were significantly greater than zero in plots with a low male frequency (q Յ 0.35), but not in plots with intermediate or high male frequencies (q Ն 0.47). However, fixation indices at the late

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Self-Sterility and Cryptic Self-Fertility in Campsis radicans (Bignoniaceae)

Cited by 41 publications

References 15 publications

Polinização de Cambessedesia hilariana (Kunth) DC. (Melastomataceae): sucesso reprodutivo versus diversidade, comportamento e freqüência de visitas de abelhas

Polinização de Cambessedesia hilariana (Kunth) DC. (Melastomataceae): sucesso reprodutivo versus diversidade, comportamento e freqüência de visitas de abelhas

Self- and cross-pollination effects on pollen tube growth and seed set in holm oak Quercus ilex L (Fagaceae)

Mating system and population genetic structure of an androdioecious tree, Fraxinus lanuginosa Koidz. (Oleaceae) in northern Japan

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