Pollinator guild organization and its consequences for reproduction in three synchronopatric species of Tibouchina (Melastomataceae)

Franco, Ana María; Goldenberg, Renato; Varassin, Isabela Galarda

doi:10.1590/s0085-56262011005000040

Cited by 18 publications

(13 citation statements)

References 37 publications

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“…Most of the bee species that were found attracted to P. trichopodum are common for species of the Melastomataceae genus Tibouchina (genus to which P. trichopodum belonged until recently; Pereira et al 2011;Franco et al 2011;Brito & Sazima 2012). Several floral visitors of one species of Tibouchina (T. pulchra), studied by Pereira et al (2011), belonged to three genera also found visiting P. trichopodum, and vary in their relative lengths (size).…”

Section: Discussionmentioning

confidence: 99%

“…The high value of the ISI index indicates that self-pollination by this species is highly efficient, which is common among other species of Melastomataceae (Goldenberg & Shepherd 1998;Franco et al 2011;Pereira et al 2011;Maia et al 2016). The independence from mates for the exchange of pollen for reproduction through selfing, confers this plant with a good capacity to colonize new areas (Holsinger 2000), which is reflected in its presence in early succession areas (Cardoso 2014).…”

Section: Discussionmentioning

confidence: 99%

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Breeding system and pollination of Pleroma trichopodum DC. (Melastomataceae): a potential species for the restoration of Atlantic Forest in southern Brazil

2018

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Plant-pollinator interactions and their reproductive implications are of central importance to the organization of plant populations and communities in restoration areas. We studied the breeding system and flower visitors of Pleroma trichopodum, a pioneer species of the Atlantic Forest. We attempted to answer three questions: (1) Is P. trichopodum dependent on pollinators and mates for reproduction? (2) What are the pollinators of P. trichopodum? (3) Do tree flower-density and flowering-tree density of P. trichopodum enhance the visitation rate of focal trees and their flowers? We tested the breeding system through pollination treatments. We performed focal observations on 10 trees and analyzed the relationship between tree and flower visitation rates, and the tree flower-density and flowering-tree density with Generalized Linear Mixed Models (GLMM). Pleroma trichopodum sets fruits by selfing and outcrossing, both of which occur only through pollinator visits. Bees visited P. trichopodum, and their visitation increased with tree flower-density. Thus, individuals with greater floral displays may function as magnet species, enhancing the pollination of nearby plant species. This characteristic, allied with the ability to reproduce without a mate (selfing) and a tolerance of soggy soils, make P. trichopodum a candidate for Atlantic Forest restoration.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Breeding system and pollination of Pleroma trichopodum DC. (Melastomataceae): a potential species for the restoration of Atlantic Forest in southern Brazil

2018

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“…; Franco et al . ; Brito & Sazima ; Fendrich T. G. unpublished data). Although it seems obvious that apomictic species that do not depend on pollinators to set fruits and seeds may be consequently less visited by them, there are species from other angiosperm families in which apomixis seems to be facultative, resulting in mixed breeding systems (Asker & Jerling ; Koltunow ; Richards ; Bicknell & Koltunow ; Good‐Avila et al .…”

Section: Introductionmentioning

confidence: 88%

“…One event that has been constantly and informally observed in Melastomataceae is that flowers of the apomictic species are rarely visited, and sometimes have no visitors at all (Renner 1989;Goldenberg & Shepherd 1998;Fendrich T. G. unpublished data). Sexual species, however, seem to be intensively visited (Santos et al 2010;Couto-Pereira et al 2011;Franco et al 2011;Brito & Sazima 2012;Fendrich T. G. unpublished data). Although it seems obvious that apomictic species that do not depend on pollinators to set fruits and seeds may be consequently less visited by them, there are species from other angiosperm families in which apomixis seems to be facultative, resulting in mixed breeding systems (Asker & Jerling 1992;Koltunow 1993;Richards 1997;Bicknell & Koltunow 2004;Good-Avila et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Apomixis does not affect visitation to flowers of Melastomataceae, but pollen sterility does

2015

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Apomixis is an asexual seed reproduction mechanism thorough which embryos are originated from material tissues inside the ovules, without precedent fertilisation. It allows plants to colonise new habitats, even in places where flower visitors are scarce or where plants are isolate. Apomixis seems to be related to pollen sterility and, in species with flowers that offer pollen as a reward for pollinators, the amount or quality of the pollen offered by these species may influence the amount of the visits and specific composition of the visitors. In order to test this hypothesis, we studied breeding systems of 16 species of Melastomataceae and their flower visitors, evaluating composition and abundance of the visits to apomictic and sexual species. Apomictic plants with no viable pollen or with pollen with low viability did not receive visits from pollinators, and consequently probably produce strictly apomictic fruits. On the other hand, apomictic and sexual plants with high pollen viability do receive visits; in this case, apomictic plants may produce fruits and seeds through both sexual and apomictic methods. The species composition of insects visiting Melastomataceae with high pollen viability was similar, regardless of whether the plants were apomictic or not. It seems that pollen viability levels are important to determine visits to the flowers irrespective of breeding system.

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“…Besides several questions concerning the evolutionary history of B. pauloensis, this species is also considered an important pollinator of Brazilian native flora and also shows potential as pollinator for economic crops (Camillo and Garófalo, 1989;Raw, 2000;Franco et al, 2011). Thus the availability of molecular markers will be very helpful to answer questions concerning B. pauloensis ecology, natural history, population dynamics and biogeography.…”

Section: Discussionmentioning

confidence: 99%

Filogeografia de Bombus morio e B. pauloensis (Hymenoptera, Apidae)

Françoso¹

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A espantosa realidade das cousas É a minha descoberta de todos os dias. Cada cousa é o que é, E é difícil explicar a alguém quanto isso me alegra, E quanto isso me basta. Alberto Caeiro ! ! AGRADECIMENTOS À Cris, por ser uma orientadora incrível, presente, e por apoiar e incentivar as minhas mais loucas ideias. Obrigada por acreditar em mim quando às vezes eu mesma duvidava. À Ana Carolina Carnaval, que prontamente me recebeu em NY, pela confiança e pelas valiosas sugestões.

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Pollinator guild organization and its consequences for reproduction in three synchronopatric species of Tibouchina (Melastomataceae)

Cited by 18 publications

References 37 publications

Breeding system and pollination of Pleroma trichopodum DC. (Melastomataceae): a potential species for the restoration of Atlantic Forest in southern Brazil

Breeding system and pollination of Pleroma trichopodum DC. (Melastomataceae): a potential species for the restoration of Atlantic Forest in southern Brazil

Apomixis does not affect visitation to flowers of Melastomataceae, but pollen sterility does

Filogeografia de Bombus morio e B. pauloensis (Hymenoptera, Apidae)

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