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AoB Plants

Title:		Heteromorphic stamens are differentially attractive in Swartzia (Fabaceae)
Author(s):		Basso-Alves JP; da Silva RF; Coimbra G; Leitao SG; de Rezende CM; Bizzo HR; Freitas L; Paulino JV; Mansano VF;
Address:		"Programa de Pos-Graduacao em Botanica, Escola Nacional de Botanica Tropical, Jardim Botanico do Rio de Janeiro, Rio de Janeiro, RJ 22460-036, Brazil. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro, DIPEQ-JBRJ, Rio de Janeiro, RJ 22460-030, Brazil. Departamento de Quimica Organica/GQO, Instituto de Quimica, Universidade Federal Fluminense (UFF), Niteroi, RJ 24020141, Brazil. Departamento de Produtos Naturais e Alimentos, Faculdade de Farmacia, Centro de Ciencias da Saude, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ 21941-902, Brazil. Instituto de Quimica, Centro de Tecnologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ 22945970, Brazil. Embrapa Agroindustria de Alimentos, Rio de Janeiro, RJ 23020-470, Brazil"
Journal Title:		AoB Plants
Year:		2022
Volume:		20220909
Issue:		5
Page Number:		lac041 -
DOI:		10.1093/aobpla/plac041
ISSN/ISBN:		2041-2851 (Print) 2041-2851 (Electronic)
Abstract:		"The division of labour hypothesis between stamens has explained the evolution of divergent functions between dimorphic stamens in the same flower. However, little is known about whether the distinct type of stamens differs in attractiveness to pollinators. Therefore, we investigate whether the two types of stamens commonly found in Swartzia have different visual and olfactory attractants. We performed observations of anthesis dynamics, registration and collection of floral visitors, measurements of reflectance of floral parts and chemical analysis of the volatile organic compounds of the floral parts of two species, S. flaemingii and S. simplex. Both species have two distinct sets of stamens: one with smaller and abundant stamens in the centre of the flower and the other with fewer but larger abaxial stamens. The sets differ in UV reflectance (only S. simplex) and exhibit a distinct chromatic contrast. Concerning olfactory attractiveness, aliphatic compounds make up most of the odour of the two species, both whole flowers and most of their floral organs. On the other hand, only S. simplex presented apocarotenoids (as ionones) and benzenoids. Furthermore, there are differences in the proportion of volatiles emitted by the stamen in both cases, as the high proportion of sesquiterpenes among the smaller stamens compared to the larger ones. In conclusion, the two types of stamens found in S. flaemingii and S. simplex show a distinct attractiveness. In addition, our data have demonstrated diverse ways of differential attractiveness both between distinct stamens set per flower and between the two species from the same pollen flowers genus"
Keywords:		Buzz pollination Leguminosae division of labour floral colour floral volatiles heteranthery pollen-only flowers;
Notes:		"PubMed-not-MEDLINEBasso-Alves, Joao Paulo da Silva, Rafael Ferreira Coimbra, Gabriel Leitao, Suzana Guimaraes de Rezende, Claudia Moraes Bizzo, Humberto Ribeiro Freitas, Leandro Paulino, Juliana Villela Mansano, Vidal de Freitas eng England 2022/10/22 AoB Plants. 2022 Sep 9; 14(5):plac041. doi: 10.1093/aobpla/plac041. eCollection 2022 Oct"