Late-acting self-incompatibility in Capparis retusa (Capparaceae), a species of Chaco woodland in NE Argentina

Bianchi, Marta B.; Gibbs, Peter

doi:10.1590/s0100-84042000000400005

Cited by 14 publications

(13 citation statements)

References 24 publications

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“…1 and 2), a phenomenon that does not exist in the sporophytic and gametophytic systems. Similar results were observed in Capparis pittieri and in C. retusa (Seavey & Bawa 1986;Bianchi & Gibbs 2000), two species that exhibit LSI.…”

Section: Resultssupporting

confidence: 82%

“…3), which is similar to other species that have the LSI mechanism, such as Capparis retusa (Capparaceae) (Bianchi & Gibbs 2000), Chorisia chodatii Hassl., C. speciosa St. Hill. (Bombacaceae), Tabebuia caraiba (Mart.)…”

Section: Resultssupporting

confidence: 67%

“…(Seavey & Bawa 1986) and C. retusa Grisenb. (Bianchi & Gibbs 2000), showing that the pollen tubes formed through selfpollination penetrated the ovule's micropyle. However, most of these ovules did not produce seeds, what was interpreted as a recognition-rejection of pollen tubes coming from selfpollination only when they were already inside the ovules.…”

Section: Introductionmentioning

confidence: 99%

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A new case of late-acting self-incompatibility in Capparis L. (Brassicaceae): C. jacobinae Moric. ex Eichler, an endemic andromonoecious species of the Caatinga, Pernambuco State, Brazil

Primo

Machado

2009

Acta Bot. Bras.

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. We studied the reproductive system of Capparis jacobinae Moric ex Eichler (Brassicaceae), based on controlled hand-pollination and observation of pollen tube growth made in a fluorescence microscope. Of 105 self-pollinated flowers only one produced fruits (success = 0.95%), all the other flowers abscised at the same time, between the eighth and tenth day after anthesis. Nevertheless, self-and cross-pollinated pollen tubes reached the micropyle. The rate of penetrated ovules in selfpollinated flowers was lower during the first 24 h after pollination; thereafter this rate was similar between self-and cross-pollinated flowers for treatments of 48 h, 72 h and 96 h after pollination. In addition, we carried out two indirect estimates of the reproductive system, based on pollen/ovule and seed/ovule ratios, which resulted in typical features of xenogamous species. We concluded that C. jacobinae has a lateacting self-incompatibility system. This is the third record of this mechanism for the genus and the first for a species of Capparis endemic to the Caatinga. We suggest that this self-incompatibility system may occur in other species of the same genus and family.

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Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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A new case of late-acting self-incompatibility in Capparis L. (Brassicaceae): C. jacobinae Moric. ex Eichler, an endemic andromonoecious species of the Caatinga, Pernambuco State, Brazil

Primo

Machado

2009

Acta Bot. Bras.

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“…Within Eucalyptus, found fertilisation had occurred in E. regnans following both controlled self-and cross-pollinations, with no difference in embryo and endosperm development up to 16 weeks after pollination. Other examples include Capparis retusa, where some self-pollinated ovules initiated embryo development; however, 96 h after pollination these self-pollinated ovules were smaller than cross-pollinated ovules (Bianchi and Gibbs 2000). Chorisia chodatii, C. speciosa, Tabebuia caraiba and T. ochracea all form resting zygotes and undergo initial endosperm divisions following self-and cross-pollinations before self-pollinated flowers abscise (Gibbs and Bianchi 1993).…”

Section: Discussionmentioning

confidence: 99%

Pollen tube growth and early ovule development following self- and cross-pollination in Eucalyptus nitens

Pound

Wallwork

Potts

et al. 2003

Sexual Plant Reproduction

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Controlled self-and cross-pollinations were conducted on flowers of five mature Eucalyptus nitens trees. Levels of self-sterility of the trees ranged from 25.8 to 93.6%. Pollen tube numbers in styles and ovule penetration by pollen tubes was investigated 2 weeks after pollination by fluorescence microscopy. There were no significant differences between treatments in the number of pollen tubes present in styles or in the percentage of ovules penetrated by pollen tubes. Embryology of material harvested 2 and 4 weeks after pollination was investigated by bright-field microscopy. Fertilisation had taken place by 2 weeks after pollination with nearly every ovule showing evidence of fertilisation. Cross-pollination resulted in a greater proportion of healthy, developing ovules, at both 2 and 4 weeks after pollination, compared with self-pollination. The proportion of degenerating ovules increased from 2 to 4 weeks after pollination. The reduced ability of E. nitens to set self-pollinated seed compared with cross-pollinated seed appears to be controlled by a post-zygotic mechanism. Differences in ovule size may potentially assist in the identification of trees incapable of setting self-pollinated seed.

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“…Koptur (1984), analisando o crescimento de tubos polínicos em sete espécies de Inga, também constatou que não havia uma barreira que impedisse a germinação dos grãos de pólen ao longo do estilete, propondo que a incompatibilidade se dava após a penetração dos tubos nas micrópilas dos óvulos. Esse sistema de incompatibilidade no qual flores autofecundadas são abortadas apenas após os óvulos serem atingidos pelos tubos polínicos, denominado sistema de autoincompatibilidade de ação tardia (LSI) (Seavey & Bawa 1986), ocorre em várias espécies de outras famílias, como Apocynum cannabinum L., Apocynaceae (Lipow & Wyatt 1999); Casearia grandiflora Cambess., Flacourtiaceae (Machado & Oliveira 2000); Capparis retusa Griseb., Capparaceae (Bianchi & Gibbs 2000), espécies de Kielmeyera, Clusiaceae (Barros 2002) e de Eucalyptus, Myrtaceae (Pound et al 2003); Capparis jacobinae Moric. ex Eichler, Brassicaceae (Primo & Machado 2009).…”

Section: Sistema Reprodutivounclassified

Limitação de polinizadores e mecanismo de autoincompatibilidade de ação tardia como causas da baixa formação de frutos em duas espécies simpátricas de Inga (Fabaceae - Mimosoideae) na Amazônia Central

2013

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ResumoForam estudados os sistemas reprodutivos de Inga edulis Mart. e Inga stipularis D.C. em uma área de floresta, localizada na Fazenda Experimental da UFAM, Manaus, AM, entre novembro/2006 a novembro/2007. Os resultados mostraram que as espécies não formam frutos a partir de autopolinizações e que o percentual de frutos provenientes de polinizações cruzadas em I. edulis (5%) e I. stipularis (21%) é superior ao da polinização natural (controle), 1% e 7%, respectivamente. As análises de tubos polínicos, provenientes de autopolinizações e de polinização cruzada revelaram que apenas uma pequena fração atinge os óvulos de I. edulis após 8 e 12 horas e os de I. stipularis 24 horas após a polinização. Além disso, encontra-se um maior percentual de tubos penetrando os óvulos de I. edulis. A chegada dos tubos nos óvulos oriundos de autopolinizações e de polinizações cruzadas é semelhante nas duas espécies. Os baixos índices de formação de frutos em I. edulis e I. stipularis provavelmente decorrem do elevado índice de geitonogamia promovido pelos polinizadores e pela autoincompatibilidade de ação tardia. Palavras-chave: Inga, tubo polínico, autoincompatibilidade de ação tardia, Floresta Amazônica. AbstractThe breeding system of Inga edulis Mart. and Inga stipularis D.C. was studied in an area of forest, located in the UFAM Experimental Farm, Manaus, AM, from November/2006 to November/2007. The results showed that both species do not set fruit from self-pollination and that the percentage of fruit set proceeding from cross-pollination in I. edulis (5%) and I. stipularis (21%) is superior to the natural pollination (control), 1% and 7%, respectively. The analyses of pollen tube, originating from self-pollination and cross-pollination, reveal that a small fraction reaches the ovules of I. edulis after 8 and 12 hours, and in I. stipularis 24 hours after pollinations. In addition there is a greater percentile of tubes penetrating in the ovules of I. edulis. The arrival speed of the tubes in the ovules deriving from self-pollination and cross-pollination is similar in both species. The low indices of fruit set in I. edulis and I. stipularis probably is a result from the raised index of geitonogamy promoted by the pollinators and the late-acting self-incompatibility.

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Late-acting self-incompatibility in Capparis retusa (Capparaceae), a species of Chaco woodland in NE Argentina

Cited by 14 publications

References 24 publications

A new case of late-acting self-incompatibility in Capparis L. (Brassicaceae): C. jacobinae Moric. ex Eichler, an endemic andromonoecious species of the Caatinga, Pernambuco State, Brazil

A new case of late-acting self-incompatibility in Capparis L. (Brassicaceae): C. jacobinae Moric. ex Eichler, an endemic andromonoecious species of the Caatinga, Pernambuco State, Brazil

Pollen tube growth and early ovule development following self- and cross-pollination in Eucalyptus nitens

Limitação de polinizadores e mecanismo de autoincompatibilidade de ação tardia como causas da baixa formação de frutos em duas espécies simpátricas de Inga (Fabaceae - Mimosoideae) na Amazônia Central

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