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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

More than euglossines: the diverse pollinators and floral scents of Zygopetalinae orchids

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Nunes, Carlos E. P. [1] ; Wolowski, Marina [2] ; Pansarin, Emerson Ricardo [3] ; Gerlach, Gunter [4] ; Aximoff, Izar [5] ; Vereecken, Nicolas J. [6] ; Salvador, Marcos Jose [7] ; Sazima, Marlies [7]
Total Authors: 8
[1] Univ Estadual Campinas, Inst Biol, Programa Posgrad Biol Vegetal, CP 6109, BR-13083970 Campinas, SP - Brazil
[2] Univ Fed Alfenas, Inst Ciencias Nat, BR-37130001 Alfenas, MG - Brazil
[3] Univ Sao Paulo, Dept Biol, Fac Filosofia Ciencias & Letras, BR-14040901 Ribeirao Preto, SP - Brazil
[4] Bot Garden Munchen Nymphenburg, Menzinger Str, 65, D-80638 Munich - Germany
[5] Inst Pesquisas Jardim Bot Rio de Janeiro, Rua Pacheco Leao 915, BR-22460030 Rio De Janeiro, RG - Brazil
[6] Free Univ Brussels, Agroecol & Pollinat Grp, Landscape Ecol & Plant Prod Syst Unit, Blvd Triomphe CP 264-2, B-1050 Brussels - Belgium
[7] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, CP 6109, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 7
Document type: Journal article
Source: NATURWISSENSCHAFTEN; v. 104, n. 11-12 DEC 2017.
Web of Science Citations: 1

Floral volatile organic compounds (VOCs) play important roles in plant-pollinator interactions. We investigated the reproductive ecology and floral VOCs of Zygopetalinae orchids to understand the relationship between floral scents and pollinators. We performed focal observations, phenological censuses and breeding system experiments in eight species in southeast Brazil. Floral scents were collected and analysed using SPME/GC-MS. We performed multivariate analyses to group species according to affinities of their VOCs and define compounds associated to each plant. Dichaea cogniauxiana was pollinated by weevils which use their developing ovules, while D. pendula was pollinated by the same weevils and perfume-collecting male euglossine bees. The other species were deceit-pollinated by bees. Zygopetalum crinitum was pollinated by carpenter bees, while W. warreana, Z. mackayi and Z. maxillare were bumblebee-pollinated. The latter was also pollinated by Centris confusa. Breeding system varied widely with no association to any pollinator group. Most VOCs are common to other floral scents. Zygopetalum crinitum presented an exclusive blend of VOCs, mainly composed of benzenoids. The scents of Pabstia jugosa, Promenaea xanthina and the Zygopetalum spp. were similar. The bumblebee-pollinated species have flowering periods partially overlapped, thus neither phenology nor pollinators constitute hybridization barriers among these species. Euglossines are not the only pollinators of Zygopetalinae. Different VOCs, size and lifespan of flowers are associated with distinct pollinators. A distinctive VOC bouquet may determine specialisation in carpenter bees or male euglossines within bee-pollinated flowers. Finally, visitation of deceit-pollinated flowers by perfume-collecting euglossines allows us to hypothesise how pollination by this group of bees had evolved. (AU)

FAPESP's process: 03/12595-7 - Floristic composition, structure and functioning of the Dense Rainforest nuclei of Picinguaba and Santa Virgínia of Parque Estadual da Serra do Mar, State of São Paulo, Brazil
Grantee:Carlos Alfredo Joly
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 13/15129-9 - Reproductive isolation and pollination in Nematanthus Schrad. and Codonanthe (Mart.) Hanst. (Gesneriaceae), two genera of epiphytic plants of the Atlantic Forest
Grantee:Marina Wolowski Torres
Support type: Scholarships in Brazil - Post-Doctorate