Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae)
Abstract Reproductive isolation plays an important role in maintaining the species integrity of sympatric close relatives. For sympatric Arisaema species, interspecific gene flow is expected to be effectively prevented by pre‐pollination barriers, particularly strong pollinator isolation mediated by...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-11-01
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| Series: | Ecology and Evolution |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ece3.10696 |
| _version_ | 1797448667671560192 |
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| author | Luo Zeng Wei‐Jie Shu Hua He Tao Li Xiao‐Chen Yang Li Li |
| author_facet | Luo Zeng Wei‐Jie Shu Hua He Tao Li Xiao‐Chen Yang Li Li |
| author_sort | Luo Zeng |
| collection | DOAJ |
| description | Abstract Reproductive isolation plays an important role in maintaining the species integrity of sympatric close relatives. For sympatric Arisaema species, interspecific gene flow is expected to be effectively prevented by pre‐pollination barriers, particularly strong pollinator isolation mediated by fungus gnats. However, due to the lack of quantitative studies combining multiple pre‐ and post‐pollination barriers, it is not known whether pre‐pollination isolation is complete, and whether post‐pollination barriers also contribute to reproductive isolation among some Arisaema species. In this study, we quantified the individual strengths and absolute contributions of four pre‐ and post‐pollination barriers (phenological isolation, pollinator isolation, hybrid fruit formation, and hybrid seed formation) among three sympatric Arisaema species (A. bockii, A. lobatum, and A. erubescens). Although phenological isolation and pollinator isolation reduced the frequencies of interspecific pollen transfer among these species, the partial overlap of flowering times and pollinator assemblages resulted in incomplete pre‐pollination isolation. Post‐pollination barriers also contributed to reproductive isolation at the hybrid fruit and seed formation stages. We propose that, although pre‐pollination barriers are expected to contribute more to total isolation than post‐pollination barriers in Arisaema, pre‐pollination barriers may not completely prevent interspecific pollen transfer among some Arisaema species. Post‐pollination barriers, which are generally ignored, may also have contributed significantly to reproductive isolation in Arisaema. |
| first_indexed | 2024-03-09T14:13:41Z |
| format | Article |
| id | doaj.art-54bf99e1e9094e78b04e6c7d3aab94e5 |
| institution | Directory Open Access Journal |
| issn | 2045-7758 |
| language | English |
| last_indexed | 2024-03-09T14:13:41Z |
| publishDate | 2023-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj.art-54bf99e1e9094e78b04e6c7d3aab94e52023-11-29T05:44:08ZengWileyEcology and Evolution2045-77582023-11-011311n/an/a10.1002/ece3.10696Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae)Luo Zeng0Wei‐Jie Shu1Hua He2Tao Li3Xiao‐Chen Yang4Li Li5College of Biology and Environmental Sciences, Jishou University Jishou Hunan ChinaCollege of Biology and Environmental Sciences, Jishou University Jishou Hunan ChinaCollege of Biology and Environmental Sciences, Jishou University Jishou Hunan ChinaCollege of Biology and Environmental Sciences, Jishou University Jishou Hunan ChinaCollege of Biology and Environmental Sciences, Jishou University Jishou Hunan ChinaCollege of Biology and Environmental Sciences, Jishou University Jishou Hunan ChinaAbstract Reproductive isolation plays an important role in maintaining the species integrity of sympatric close relatives. For sympatric Arisaema species, interspecific gene flow is expected to be effectively prevented by pre‐pollination barriers, particularly strong pollinator isolation mediated by fungus gnats. However, due to the lack of quantitative studies combining multiple pre‐ and post‐pollination barriers, it is not known whether pre‐pollination isolation is complete, and whether post‐pollination barriers also contribute to reproductive isolation among some Arisaema species. In this study, we quantified the individual strengths and absolute contributions of four pre‐ and post‐pollination barriers (phenological isolation, pollinator isolation, hybrid fruit formation, and hybrid seed formation) among three sympatric Arisaema species (A. bockii, A. lobatum, and A. erubescens). Although phenological isolation and pollinator isolation reduced the frequencies of interspecific pollen transfer among these species, the partial overlap of flowering times and pollinator assemblages resulted in incomplete pre‐pollination isolation. Post‐pollination barriers also contributed to reproductive isolation at the hybrid fruit and seed formation stages. We propose that, although pre‐pollination barriers are expected to contribute more to total isolation than post‐pollination barriers in Arisaema, pre‐pollination barriers may not completely prevent interspecific pollen transfer among some Arisaema species. Post‐pollination barriers, which are generally ignored, may also have contributed significantly to reproductive isolation in Arisaema.https://doi.org/10.1002/ece3.10696Arisaemafungus gnatpre‐ and post‐pollination barriersreproductive isolationspecies coexistence |
| spellingShingle | Luo Zeng Wei‐Jie Shu Hua He Tao Li Xiao‐Chen Yang Li Li Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae) Ecology and Evolution Arisaema fungus gnat pre‐ and post‐pollination barriers reproductive isolation species coexistence |
| title | Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae) |
| title_full | Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae) |
| title_fullStr | Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae) |
| title_full_unstemmed | Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae) |
| title_short | Post‐pollination barriers contribute to coexistence of partially pollinator‐sharing Arisaema species (Araceae) |
| title_sort | post pollination barriers contribute to coexistence of partially pollinator sharing arisaema species araceae |
| topic | Arisaema fungus gnat pre‐ and post‐pollination barriers reproductive isolation species coexistence |
| url | https://doi.org/10.1002/ece3.10696 |
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