Evolution of Floral Fragrance Is Compromised by Herbivory

Ramos, Sergio E.; Schiestl, Florian P.

doi:10.3389/fevo.2020.00030

Cited by 16 publications

(12 citation statements)

References 35 publications

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“…Herbivore attacks to other parts of the plant or drought can change the composition of floral volatiles(Burkle & Runyon, 2016;Ramos & Schiestl, 2020), which provide additional information regarding changes in the physiological status of the emitter plant (Figure 2B,G). Moreover, it remains unclear whether the neighbouring plants prioritise between floral or leaf volatiles, and which are more important for adaption responses.…”

mentioning

confidence: 99%

Plant volatiles as cues and signals in plant communication

Ninkovic

Marković

Rensing

2020

Plant Cell & Environment

165

119

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Volatile organic compounds are important mediators of mutualistic interactions between plants and their physical and biological surroundings. Volatiles rapidly indicate competition or potential threat before these can take place, and they regulate and coordinate adaptation responses in neighbouring plants, fine-tuning them to match the exact stress encountered. Ecological specificity and context-dependency of plant-plant communication mediated by volatiles represent important factors that determine plant performance in specific environments. In this review, we synthesise the recent progress made in understanding the role of plant volatiles as mediators of plant interactions at the individual and community levels, highlighting the complexity of the plant receiver response to diverse volatile cues and signals and addressing how specific responses shape plant growth and survival. Finally, we outline the knowledge gaps and provide directions for future research. The complex dialogue between the emitter and receiver based on either volatile cues or signals determines the outcome of information exchange, which shapes the communication pattern between individuals at the community level and determines their ecological implications at other trophic levels.

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confidence: 99%

Plant volatiles as cues and signals in plant communication

Ninkovic

Marković

Rensing

2020

Plant Cell & Environment

165

119

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“…The lack of divergence in qualitative olfactory receptor sensitivity may stem either from selection on broad olfactory sensitivity or from lack of suitable genetic variation. Selection for broad olfactory sensitivity in interactions may result from plant populations producing complex and variable floral volatile bouquets that may potentially evolve rapidly (Gervasi and Schiestl 2017;Ramos and Schiestl 2020). Under these conditions, reliance on one or a few compounds could be selectively disadvantageous.…”

Section: Discussionmentioning

confidence: 99%

“…A fascinating, yet almost unexplored question is whether and how rapidly receptor sensitivity may co-evolve with plant volatile emission (Schiestl and Dötterl 2012). Floral scent in Lithophragma is chemically highly diverse, both among populations and species (Friberg et al 2013(Friberg et al , 2019, indicating rapid evolutionary divergence in this key floral signal (Ramos and Schiestl 2020). Such pattern of high variability has been found in other nursery pollination systems, too (Dötterl et al 2005;Suinyuy et al 2015;Waelti et al 2008), but contrasts to the highly conserved odor bouquets found in yucca flowers (Svensson et al 2005(Svensson et al , 2006(Svensson et al , 2011.…”

Section: Introductionmentioning

confidence: 98%

Generalized olfactory detection of floral volatiles in the highly specialized Greya-Lithophragma nursery pollination system

Schiestl

Wallin

Beck

et al. 2021

Arthropod-Plant Interactions

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Volatiles are of key importance for host-plant recognition in insects. In the pollination system of Lithophragma flowers and Greya moths, moths are highly specialized on Lithophragma, in which they oviposit and thereby pollinate the flowers. Floral volatiles in Lithophragma are highly variable between species and populations, and moths prefer to oviposit into Lithophragma flowers from populations of the local host species. Here we used gas chromatography coupled with electroantennographic detection (GC-EAD) to test whether Greya moths detect specific key volatiles or respond broadly to many volatiles of Lithophragma flowers. We also addressed whether olfactory detection in Greya moths varies across populations, consistent with a co-evolutionary scenario. We analyzed flower volatile samples from three different species and five populations of Lithophragma occurring across a 1400 km range in the Western USA, and their sympatric female Greya politella moths. We showed that Greya politella detect a broad range of Lithophragma volatiles, with a total of 23 compounds being EAD active. We chemically identified 15 of these, including the chiral 6, 10, 14-trimethylpentadecan-2-one (hexahydrofarnesyl acetone), which was not previously detected in Lithophragma. All investigated Lithophragma species produced the (6R, 10R)-enantiomer of this compound. We showed that Greya moths detected not only volatiles of their local Lithophragma plants, but also those from allopatric populations/species that they not encounter in local populations. In conclusion, the generalized detection of volatiles and a lack of co-divergence between volatiles and olfactory detection may be of selective advantage for moths in tracking hosts with rapidly evolving, chemically diverse floral volatiles.

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“…In addition, we found that neither the honeybees nor the bumblebees extended their proboscises toward tomato floral scent innately ( Figure 5 ). In natural ecosystems, both pollinators and non-pollinators impose selection on plant floral traits [ 48 , 49 ]. Plants use olfactory cues to attract bee pollinators.…”

Section: Discussionmentioning

confidence: 99%

Prior Experience with Food Reward Influences the Behavioral Responses of the Honeybee Apis mellifera and the Bumblebee Bombus lantschouensis to Tomato Floral Scent

Zhang

Shan

et al. 2020

Insects

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Bee responses to floral scent are usually influenced by both innate biases and prior experience. Honeybees are less attracted than bumblebees to tomato flowers. However, little is known about how tomato floral scent regulates the foraging behaviors of honeybees and bumblebees. In this study, the foraging behaviors of the honeybee Apis mellifera and the bumblebee Bombus lantschouensis on tomato flowers in greenhouses were investigated. Whether the two bee species exhibit different responses to tomato floral scent and how innate biases and prior experience influence bee choice behavior were examined. In the greenhouses, honeybees failed to collect pollen from tomato flowers, and their foraging activities decreased significantly over days. Additionally, neither naïve honeybees nor naïve bumblebees showed a preference for tomato floral scent in a Y-tube olfactometer. However, foraging experience in the tomato greenhouses helped bumblebees develop a strong preference for the scent, whereas honeybees with foraging experience continued to show aversion to tomato floral scent. After learning to associate tomato floral scent with a sugar reward in proboscis extension response (PER) assays, both bee species exhibited a preference for tomato floral scent in Y-tube olfactometers. The findings indicated that prior experience with a food reward strongly influenced bee preference for tomato floral scent.

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Evolution of Floral Fragrance Is Compromised by Herbivory

Cited by 16 publications

References 35 publications

Plant volatiles as cues and signals in plant communication

Plant volatiles as cues and signals in plant communication

Generalized olfactory detection of floral volatiles in the highly specialized Greya-Lithophragma nursery pollination system

Prior Experience with Food Reward Influences the Behavioral Responses of the Honeybee Apis mellifera and the Bumblebee Bombus lantschouensis to Tomato Floral Scent

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