scholarly journals Multimodal floral cues guide mosquitoes to tansy inflorescences

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Daniel A. H. Peach ◽  
Regine Gries ◽  
Huimin Zhai ◽  
Nathan Young ◽  
Gerhard Gries
Keyword(s):  
Floral Cues

scholarly journals Host-plant finding and recognition by visual and olfactory floral cues in an oligolectic bee

2010 ◽  
Vol 24 (6) ◽  
pp. 1234-1240 ◽  
Author(s):  
Hannah Burger ◽  
Stefan Dötterl ◽  
Manfred Ayasse
Keyword(s):  
Host Plant ◽  
Floral Cues

The value of information in floral cues: bumblebee learning of floral size cues

2015 ◽  
Vol 26 (5) ◽  
pp. 1335-1344 ◽  
Author(s):  
Carla J. Essenberg ◽  
Rebekah A. Easter ◽  
Rachel A. Simmons ◽  
Daniel R. Papaj
Keyword(s):  
Value Of Information ◽  
Floral Cues

scholarly journals Author Correction: Multimodal floral cues guide mosquitoes to tansy inflorescences

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Daniel A. H. Peach ◽  
Regine Gries ◽  
Huimin Zhai ◽  
Nathan Young ◽  
Gerhard Gries
Keyword(s):  
Floral Cues

Preference of three scarab beetle species to floral cues

2020 ◽  
Vol 10 (10) ◽  
pp. 1764-1770
Author(s):  
Hongfei Zhang ◽  
Weizheng Li ◽  
Yan Zhang ◽  
Guohui Yuan ◽  
Mingsheng Yang
Keyword(s):  
Sexual Differentiation ◽  
Visual Cues ◽  
Sensory Modality ◽  
Scarab Beetle ◽  
Beetle Species ◽  
Radial Gradient ◽  
Holotrichia Parallela ◽  
Color Components ◽  
Floral Cues

The role of floral visual cues was studied in both sexes of three nocturnal scarab beetle species (Holotrichia oblita, Holotrichia parallela, and Anomala corpulenta). Flower patterns were designed using n-petal rose curve and radial gradient tools. Bioassay of plain colored patterns showed that both sexes of H. oblita and H. parallela preferred yellow and white. In contrast, A. corpulenta showed sexual differentiation in preferences. Comparison between given radial gradient patterns and their color components indicated that a radial gradient was necessary in both sexes of H. oblita rather than both sexes of H. parallela to elicit the highest response. Sexual differentiation was found in A. corpulenta. Among 4-, 8-, and 12-petaled patterns, the 4-petaled patterns were most preferred by all of the test insects, regardless of species and sex. Choice assays that provided both odor and visual cues suggest that olfaction may be the primary sensory modality in the three scarab species.

Visual and olfactory floral cues related to ambophilous pollination systems in Poaceae

2019 ◽  
Author(s):  
Isadora Schulze-Albuquerque ◽  
Ana Carolina Galindo Da Costa ◽  
Paulo Milet-Pinheiro ◽  
Daniela Maria Do Amaral Ferraz Navarro ◽  
William Wayt Thomas ◽  
...  
Keyword(s):  
Grass Species ◽  
Wind Pollination ◽  
Pollen Vectors ◽  
Pollinating Insects ◽  
Floral Visitors ◽  
Pollen Vector ◽  
Pollination Systems ◽  
Chloris Barbata ◽  
Floral Cues

Abstract Usually considered anemophilous, grasses (Poaceae) have been the subject of few studies that recorded insects visiting their flowers. Such visitors, with wind, could act as pollen vectors in a possible ambophilous system. Since colour and scent are floral cues attracting pollinating insects, we aimed to provide the first insights into how these cues could be involved in the attraction of pollinators by grasses. Chloris barbata, Paspalum maritimum (with two morphotypes), P. millegrana and Urochloa plantaginea were studied. We determined the role of each pollen vector (wind and insect) and we registered the frequency of floral visitors. Also, we characterized the colour reflectance of glumes, anthers and stigmas and we determined the colour space in the bee colour hexagon and the chemical composition of floral scents. The floral structures of each species reflect colour differently and are perceived differently by pollinators. Furthermore, the volatile organic compounds detected are similar to those found in entomophilous species. In two of the grass species, we registered eight species of visitors, including bees, wasps and flies. Overall, wind was the most important vector for reproductive success. Insects, however, may induce wind pollination by creating pollen clouds when they visit inflorescences.

scholarly journals Host location by visual and olfactory floral cues in an oligolectic bee: innate and learned behavior

2012 ◽  
Vol 23 (3) ◽  
pp. 531-538 ◽  
Author(s):  
Paulo Milet-Pinheiro ◽  
Manfred Ayasse ◽  
Clemens Schlindwein ◽  
Heidi E. M. Dobson ◽  
Stefan Dötterl
Keyword(s):  
Host Location ◽  
Learned Behavior ◽  
Floral Cues

scholarly journals Asteraceae Paradox: Chemical and Mechanical Protection of Taraxacum Pollen

Insects ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 304 ◽  
Author(s):  
Maryse Vanderplanck ◽  
Hélène Gilles ◽  
Denis Nonclercq ◽  
Pierre Duez ◽  
Pascal Gerbaux
Keyword(s):  
Bombus Terrestris ◽  
Chemical Defenses ◽  
Physiological Effects ◽  
Plant Selection ◽  
Toxic Compounds ◽  
Offspring Production ◽  
Pollen Feeding ◽  
Mechanical Defense ◽  
Chemical Traits ◽  
Floral Cues

Excessive pollen harvesting by bees can compromise the reproductive success of plants. Plants have therefore evolved different morphological structures and floral cues to narrow the spectrum of pollen feeding visitors. Among “filtering” mechanisms, the chemical and mechanical protection of pollen might shape bee-flower interactions and restrict pollen exploitation to a specific suite of visitors such as observed in Asteraceae. Asteraceae pollen is indeed only occasionally exploited by generalist bee species but plentifully foraged by specialist ones (i.e., Asteraceae paradox). During our bioassays, we observed that micro-colonies of generalist bumblebee (Bombus terrestris L.) feeding on Taraxacum pollen (Asteraceae) reduced their pollen collection and offspring production. Bees also experienced physiological effects of possible defenses in the form of digestive damage. Overall, our results suggest the existence of an effective chemical defense in Asteraceae pollen, while the hypothesis of a mechanical defense appeared more unlikely. Pre- and post-ingestive effects of such chemical defenses (i.e., nutrient deficit or presence of toxic compounds), as well as their role in the shaping of bee-flower interactions, are discussed. Our results strongly suggest that pollen chemical traits may act as drivers of plant selection by bees and partly explain why Asteraceae pollen is rare in generalist bee diets.

Detection and Learning of Floral Electric Fields by Bumblebees

Science ◽  
2013 ◽  
Vol 340 (6128) ◽  
pp. 66-69 ◽  
Author(s):  
Dominic Clarke ◽  
Heather Whitney ◽  
Gregory Sutton ◽  
Daniel Robert
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Visual Cues ◽  
Bombus Terrestris ◽  
Sensory Modality ◽  
Floral Rewards ◽  
Shape Pattern ◽  
Field Information ◽  
Floral Cues

Insects use several senses to forage, detecting floral cues such as color, shape, pattern, and volatiles. We report a formerly unappreciated sensory modality in bumblebees (Bombus terrestris), detection of floral electric fields. These fields act as floral cues, which are affected by the visit of naturally charged bees. Like visual cues, floral electric fields exhibit variations in pattern and structure, which can be discriminated by bumblebees. We also show that such electric field information contributes to the complex array of floral cues that together improve a pollinator’s memory of floral rewards. Because floral electric fields can change within seconds, this sensory modality may facilitate rapid and dynamic communication between flowers and their pollinators.

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