On the Air: Broadcasting and Reception of Volatile Messages in Brood-Site Pollination Mutualisms
Brood-site pollination mutualisms are those in which plants offer sites to pollinators for the development of offspring or mimic the presence of these sites in exchange for pollination services. Floral scent is an important component of pollinator attraction in such mutualisms and is often composed of volatiles that are commonly emitted by plants in other contexts. Therefore, private channels that employ unusual scent compounds are not the norm. Pollinators must make sense of the volatile messages broadcast by plants against the ensuing background volatile noise using a combination of strategies at the peripheral olfactory system and at higher processing levels. Pollinator reproduction, parts of which occur on or within the host plant, imposes special restrictions on partner compatibility within brood-site pollination systems. A comprehensive understanding of constraints on volatile broadcasting and reception within ecological and evolutionary contexts in this cross-kingdom communication must inform and guide future research in this area.
KeywordsAntennal Lobe Floral Scent Floral Volatile Butyric Acid Methyl Ester Brood Site
I am grateful to Pratibha Yadav and Vignesh Venkateswaran for the help with the figures. Our work is supported by the Indian Ministry of Environment, Forests and Climate Change, the Department of Science and Technology and the Department of Biotechnology.
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