Facilitación en la polinización por abejas generalistas y especialistas de cactáceas del semidesierto de Querétaro

Soto, Enio

doi:10.24275/uami.c247ds35t

Cited by 1 publication

(2 citation statements)

References 62 publications

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“…For three species of Tillandsia (T. juncea, T. polystachia, and T. variabilis, Ramírez-Rosas et al, 2020) and for Iris fulva and Iris hexagona (Cruzan et al, 1994), an overlap in flowering is the first element that favors flowers interacting with similar pollinators and thus the formation of hybrid fruits and seeds between those species. In our study system, flowering by each species significantly overlapped with one or more species each year, and other studies suggest a similar community of pollinating bees (Mandujano et al, 2014;Munguía-Soto, 2017;Manzanarez-Villasana and Mandujano, 2021).…”

Section: Discussionsupporting

confidence: 76%

“…The primary visitors to the flowers of all four species are medium-sized, solitary bees such as Diadasia rinconis, Melissodes sp., Augochlora sp., and Augochlorella sp., and small solitary bees, such as Megachille sp., Macrotera sp., Ashmeadiella sp., and Lassioglossum sp. (Mandujano et al, 2014;Munguía-Soto, 2017;Manzanarez-Villasana and Mandujano, 2021). Other bee species such as Apis mellifera and Bombus pensylvanicus (Munguía-Soto, 2017) also visit the four study species.…”

Section: Study Speciesmentioning

confidence: 99%

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Is self‐incompatibility a reproductive barrier for hybridization in a sympatric species?

Martínez‐Ramos,

Vázquez‐Santana,

García‐Franco

et al. 2024

American J of Botany

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PremiseBarriers at different reproductive stages contribute to reproductive isolation. Self‐incompatibility (SI) systems that prevent self‐pollination could also act to control interspecific pollination and contribute to reproductive isolation, preventing hybridization. Here we evaluated whether SI contributes to reproductive isolation among four co‐occurring Opuntia species that flower at similar times and may hybridize with each other.MethodsWe assessed whether Opuntia cantabrigiensis, O. robusta, O. streptacantha, and O. tomentosa, were self‐compatible and formed hybrid seeds in five manipulation treatments to achieve self‐pollination, intraspecific cross‐pollination, open pollination (control), interspecific crosses or apomixis, then recorded flowering phenology and synchrony.ResultsAll species flowered in the spring with a degree of synchrony, so that two pairs of species were predisposed to interspecific pollination (O. cantabrigiensis with O. robusta, O. streptacantha with O. tomentosa). All species had distinct reproductive systems: Opuntia cantabrigiensis is self‐incompatible and did not produce hybrid seeds as an interspecific pollen recipient; O. robusta is a dioecious species, which formed a low proportion of hybrid seeds; O. streptacantha and O. tomentosa are self‐compatible and produced hybrid seeds.ConclusionsOpuntia cantabrigiensis had a strong pollen–pistil barrier, likely due to its self‐incompatibility. Opuntia robusta, the dioecious species, is an obligate outcrosser and probably partially lost its ability to prevent interspecific pollen germination. Given that the self‐compatible species can set hybrid seeds, we conclude that pollen–pistil interaction and high flowering synchrony represent weak barriers; whether reproductive isolation occurs later in their life cycle (e.g., germination or seedling survival) needs to be determined.

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Section: Discussionsupporting

confidence: 76%

Section: Study Speciesmentioning

confidence: 99%