Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/32231
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Pollen dispensing schedules in buzz-pollinated plants: Experimental comparison of species with contrasting floral morphologies
Author(s): Kemp, Jurene E
Vallejo-Marín, Mario
Contact Email: mario.vallejo@stir.ac.uk
Keywords: buzz pollination
biomechanics
pollen presentation theory
poricidal anther morphology
Solanum
sonication
Date Deposited: 2-Feb-2021
Citation: Kemp JE & Vallejo-Marín M (2021) Pollen dispensing schedules in buzz-pollinated plants: Experimental comparison of species with contrasting floral morphologies. American Journal of Botany.
Abstract: Premise: Plants can mitigate the fitness costs associated with pollen consumption by floral visitors by optimizing pollen release rates. In buzz-pollinated plants, bees apply vibrations to remove pollen from anthers with small pores. These poricidal anthers potentially function as mechanism staggering pollen release, but this has rarely been tested across plant species differing in anther morphology. Methods: In Solanum section Androceras, three pairs of buzz-pollinated species have undergone independent evolutionary shifts between large- and small-flowers, which are accompanied by replicate changes in anther morphology. We used these shifts in anther morphology to characterise the association between anther morphology and pollen dispensing schedules. We applied simulated bee-like vibrations to anthers to elicit pollen release, and compared pollen dispensing schedules across anther morphologies. We also investigated how vibration velocity affects pollen release. Key Results: Replicate transitions in Solanum anther morphology are associated with consistent changes in pollen dispensing schedules. We found that small-flowered taxa release their pollen at higher rates than their large-flowered counterparts. Higher vibration velocities resulted in quicker pollen dispensing and more total pollen released. Finally, both the pollen dispensing rate and the amount of pollen released in the first vibration were negatively related to anther wall area, but we did not observe any association between pore size and pollen dispensing. Conclusions: Our results provide the first empirical demonstration that the pollen dispensing properties of poricidal anthers depend on both floral characteristics and bee vibration properties. Morphological modification of anthers could thus provide a mechanism to exploit different pollination environments.
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Notes: Output Status: Forthcoming

Files in This Item:
File Description SizeFormat 
Pollen_dispensing_MS_Rev2_20200105_for Mario.pdfFulltext - Accepted Version2.11 MBAdobe PDFUnder Embargo until 2024-01-13    Request a copy

Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.



This item is protected by original copyright



Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.