Pollination ecology and breeding system of two Calceolaria species in Chile

Murúa, Maureen; Cisterna, Jannina; Rosende, Benito

doi:10.1186/0717-6317-1-7

Cited by 5 publications

(6 citation statements)

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“…Centridini (Centris) and Tapinotaspidini (Chalepogenus, Tapinotaspis) bees are the main visitors of the Calceolaria species (Vogel 1974;Rasmussen & Olesen 2000;Sérsic 2004;Cosacov et al 2012;Murúa et al 2014, Tab 1). The oil is generally collected with the front legs and it is transferred to the hind legs during flight (Sérsic 2004).…”

Section: Lamialesmentioning

confidence: 99%

Elaiophores: their taxonomic distribution, morphology and functions

Possobom

Machado

2017

Acta Bot. Bras.

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Elaiophores are fl oral glands that secrete non-volatile oils as a reward for their pollinators. Th eir secretions mediate a specialized interaction between oil-producing plants and a few species of oil-collecting bees -Apidae and Melittidae. Th e present review focuses on the morphological and functional aspects of these secretory structures. We also provide information on their chemistry and pollination ecology. Our survey is organized taxonomically among the plant families for which elaiophore occurrence has been confi rmed -for the monocots, Iridaceae and Orchidaceae, and for the eudicots, Calceolariaceae, Cucurbitaceae, Krameriaceae, Malpighiaceae, Plantaginaceae, Primulaceae, Scrophulariaceae, Solanaceae and Stilbaceae. Most oil fl owers are zygomorphic, bisexual, nectarless and present their elaiophores on the protective whorls or on the androecium. Trichomal elaiophores are reported in all of these families except Krameriaceae and Malpighiaceae, and they vary in the density and morphology of the trichomes. Epithelial elaiophores occur in some monocot representatives and in Krameriaceae and Malpighiaceae, and are similar among species. An intermediate type of elaiophore is reported in some species of Orchidaceae. Regardless of elaiophore type, these glands have similar subcellular features and secretion-release mechanisms. Finally, we note the dearth of information on elaiophore ultrastructure and functioning for several plant families.

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Section: Lamialesmentioning

confidence: 99%

Elaiophores: their taxonomic distribution, morphology and functions

Possobom

Machado

2017

Acta Bot. Bras.

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“…Therefore, and considering the level of pollinator specialization in the study system [19,[22][23], it is not surprising that some of the studied species are able to self-pollinate at some level. Further, recent studies in a few Calceolaria species have reveled their capacity for geitonogamy, suggesting an opportunity for the evolution of reproductive assurance mechanisms in the genus [18,20,24].…”

Section: Selfing and Floral Charactersmentioning

confidence: 99%

Plant reproductive strategies are not correlated with morphological or genetic diversity in specialized pollination interactions

Murúa¹,

Espíndola²,

Pérez³

2020

Preprint

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Bachground: One of the most common evolutionary transitions in angiosperms is the reproductive change from outcrossing to self-fertilization, which has occurred independently in many lineages. This transition has been associated with changes in floral biology, ecology and genetics, with selfing species experiencing reduced floral display and herkogamy, rapid plant growth, and increased inbreeding depression. Here, we aim to test whether self-compatibility was associated with a reduction in floral traits important to the attraction and interaction with pollinators, and a reduction in genetic diversity and inbreeding. Results: Our self-incompatibility tests indicated that 50% of the species studied here are self-incompatible. In relation to floral traits, we found that self-incompatible species do not show a reduction in the size of their floral traits, but rather we found larger corolla, elaiophore area, and herkogamy in self-compatible ones. The microsatellite analysis did not identify any significant decrease in the genetic diversity or increase in inbreeding levels in the self-compatible Calceolaria species. Conclusions: Despite our results go against our expectations, in the case of Calceolaria , their high dependence on only two genera of oil-bees put the species in a vulnerable position, probably facilitating the evolution of mechanisms of reproductive assurance in the absence of pollinators. As a result, the plants maintain their attraction traits while evolving an ability to self. In addition, we also did not detect a significant change in genetic diversity or inbreeding when different reproductive strategies are used. This suggests that selfing could be delayed, facilitating -when possible- the exchange of genes by cross-pollination first, and buffering the negative genetic effects of self-pollination.

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“…This unusual reward is collected by two genus of oil-collecting bees, Centris and Chalepogenus, which use the oil to larvae feeding and nest sealing (Sérsic 2004). This type of plantpollinator interaction has been described as one of the most specialized relationship in Chile, especially because most of the plant species belonging to this genus strictly depend on insect for pollination (Sérsic 2004, Murúa et al 2014.…”

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“…The reproductive system of many Andean species is still unknown, especially of those species with specialized pollination system. In particular, it has been observed that Calceolaria species show a wide spectrum of reproductive strategies from complete to partial autogamy (Murúa et al 2014), which seems to be tightly related to the availability of their specific pollinator species (i.e., oil-collecting bees). Therefore, the characterization of this ecological variability in Calceolaria seems to be a key aspect to understand the biology of these species and the nature of this unusual type of plant-pollinator relationship in Chile.…”

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confidence: 99%

Contrasting floral morphology and breeding systems in two subspecies of Calceolaria corymbosa in Central Chile

Cisterna

Murúa

2018

Gayana Bot.

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En este estudio se caracterizó la morfología floral y se evaluaron aspectos básicos de la biología reproductiva en dos subespecies de Calceolaria corymbosa en Chile central. Nuestros resultados muestran que los rasgos de atracción de polinizadores fueron similares entre subespecies. No obstante, rasgos relacionados con la reproducción (e.g., hercogamia) podrían explicar las diferencias entre ellas. Adicionalmente, ambas subespecies mostraron diferentes estrategias reproductivas, donde C. corymbosa ssp. mimuloides fue una especie alógama, mientras que C. corymbosa ssp. santiaguina fue autocompatible y autogama parcial. En general, estos resultados sugieren que especies morfológicamente similares pueden presentar diferentes estrategias reproductivas posiblemente de acuerdo a su hábitat.

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Pollination ecology and breeding system of two Calceolaria species in Chile

Cited by 5 publications

References 0 publications

Elaiophores: their taxonomic distribution, morphology and functions

Elaiophores: their taxonomic distribution, morphology and functions

Plant reproductive strategies are not correlated with morphological or genetic diversity in specialized pollination interactions

Contrasting floral morphology and breeding systems in two subspecies of Calceolaria corymbosa in Central Chile

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