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Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis

Argyreia siamensis is extremely rare, and very little is known about its reproduction. The species has colorful flowers that seem likely to attract pollinators, but population sizes are typically small (<30 individuals). To determine whether poor reproduction contributes to its rarity, we investi...

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Autores principales: Jirabanjongjit, Awapa, Traiperm, Paweena, Sando, Tomoki, Stewart, Alyssa B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623002/
https://www.ncbi.nlm.nih.gov/pubmed/34834765
http://dx.doi.org/10.3390/plants10112402
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author Jirabanjongjit, Awapa
Traiperm, Paweena
Sando, Tomoki
Stewart, Alyssa B.
author_facet Jirabanjongjit, Awapa
Traiperm, Paweena
Sando, Tomoki
Stewart, Alyssa B.
author_sort Jirabanjongjit, Awapa
collection PubMed
description Argyreia siamensis is extremely rare, and very little is known about its reproduction. The species has colorful flowers that seem likely to attract pollinators, but population sizes are typically small (<30 individuals). To determine whether poor reproduction contributes to its rarity, we investigated its mating system and potential pollinators in two populations. We also examined the staminal trichomes and floral nectary to investigate their role in pollinator attraction. The mating system was assessed with a bagging experiment and pollinator visits were recorded with action cameras. Additionally, we tested the staminal trichomes and floral nectary for terpenes and flavonoids and examined floral nectary micromorphology via scanning electron microscope and compound light microscope. Our results reveal that A. siamensis is self-incompatible and dependent on pollinators; the western population was pollinated by bees (Meliponini and Amegilla), while the eastern population was mainly pollinated by skipper butterflies (Hesperiidae). Both staminal trichomes and the floral nectary appear to contribute to pollinator attraction through the presence of terpenes and flavonoids (in both secretory structures) and nectariferous tissue and nectarostomata (in the nectary). Our results indicate that A. siamensis has reliable and effective pollinators and that insufficient pollination is likely not a primary cause of its rarity.
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spelling pubmed-86230022021-11-27 Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis Jirabanjongjit, Awapa Traiperm, Paweena Sando, Tomoki Stewart, Alyssa B. Plants (Basel) Article Argyreia siamensis is extremely rare, and very little is known about its reproduction. The species has colorful flowers that seem likely to attract pollinators, but population sizes are typically small (<30 individuals). To determine whether poor reproduction contributes to its rarity, we investigated its mating system and potential pollinators in two populations. We also examined the staminal trichomes and floral nectary to investigate their role in pollinator attraction. The mating system was assessed with a bagging experiment and pollinator visits were recorded with action cameras. Additionally, we tested the staminal trichomes and floral nectary for terpenes and flavonoids and examined floral nectary micromorphology via scanning electron microscope and compound light microscope. Our results reveal that A. siamensis is self-incompatible and dependent on pollinators; the western population was pollinated by bees (Meliponini and Amegilla), while the eastern population was mainly pollinated by skipper butterflies (Hesperiidae). Both staminal trichomes and the floral nectary appear to contribute to pollinator attraction through the presence of terpenes and flavonoids (in both secretory structures) and nectariferous tissue and nectarostomata (in the nectary). Our results indicate that A. siamensis has reliable and effective pollinators and that insufficient pollination is likely not a primary cause of its rarity. MDPI 2021-11-07 /pmc/articles/PMC8623002/ /pubmed/34834765 http://dx.doi.org/10.3390/plants10112402 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jirabanjongjit, Awapa
Traiperm, Paweena
Sando, Tomoki
Stewart, Alyssa B.
Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis
title Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis
title_full Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis
title_fullStr Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis
title_full_unstemmed Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis
title_short Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, Argyreia siamensis
title_sort pollination and floral biology of a rare morning glory species endemic to thailand, argyreia siamensis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623002/
https://www.ncbi.nlm.nih.gov/pubmed/34834765
http://dx.doi.org/10.3390/plants10112402
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