| Title: | Spatial patterning of scent in petunia corolla is discriminated by bees and involves the ABCG1 transporter |
| Author(s): | Skaliter O; Kitsberg Y; Sharon E; Shklarman E; Shor E; Masci T; Yue Y; Arien Y; Tabach Y; Shafir S; Vainstein A; |
| Address: | "Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel. Department of Developmental Biology and Cancer Research, The Institute for Medical Research Israel-Canada, Hadassah Medical School, The Hebrew University of Jerusalem, Jerusalem, 91120, Israel. B. Triwaks Bee Research Center, Department of Entomology, Institute of Environmental Sciences, Robert H. Smith Faculty of Agriculture, Food & Environment, The Hebrew University of Jerusalem, Rehovot, 76100, Israel" |
| ISSN/ISBN: | 1365-313X (Electronic) 0960-7412 (Linking) |
| Abstract: | "Floral guides are patterned cues that direct the pollinator to the plant reproductive organs. The spatial distribution of showy visual and olfactory traits allows efficient plant-pollinator interactions. Data on the mechanisms underlying floral volatile patterns or their interactions with pollinators are lacking. Here we characterize the spatial emission patterns of volatiles from the corolla of the model plant Petunia x hybrida and reveal the ability of honeybees to distinguish these patterns. Along the adaxial epidermis, in correlation with cell density, the petal base adjacent to reproductive organs emitted significantly higher levels of volatiles than the distal petal rim. Volatile emission could also be differentiated between the two epidermal surfaces: emission from the adaxial side was significantly higher than that from the abaxial side. Similar emission patterns were also observed in other petunias, Dianthus caryophyllus (carnation) and Argyranthemum frutescens (Marguerite daisy). Analyses of transcripts involved in volatile production/emission revealed lower levels of the plasma-membrane transporter ABCG1 in the abaxial versus adaxial epidermis. Transient overexpression of ABCG1 enhanced emission from the abaxial epidermis to the level of the adaxial epidermis, suggesting its involvement in spatial emission patterns in the epidermal layers. Proboscis extension response experiments showed that differences in emission levels along the adaxial epidermis, that is, petal base versus rim, detected by GC-MS are also discernible by honeybees" |
| Keywords: | "ATP Binding Cassette Transporter, Subfamily G, Member 1/genetics/*metabolism Animals Bees/*physiology Flowers/*chemistry/metabolism Odorants/*analysis Petunia/*physiology Plant Proteins/genetics/*metabolism Volatile Organic Compounds/chemistry/metabolism;" |
| Notes: | "MedlineSkaliter, Oded Kitsberg, Yaarit Sharon, Elad Shklarman, Elena Shor, Ekaterina Masci, Tania Yue, Yuling Arien, Yael Tabach, Yuval Shafir, Sharoni Vainstein, Alexander eng Research Support, Non-U.S. Gov't England 2021/04/11 Plant J. 2021 Jun; 106(6):1746-1758. doi: 10.1111/tpj.15269. Epub 2021 Apr 30" |
