Many features of flowers comprise the key elements of the pollinating strategies of flowering plants. Our aims were to describe features that attract pollinators and to identify the pollination system of Petunia interior, a species for which bees have been suggested as the probable pollinators. Therefore, we described the morphology and floral biology, assessed nectar production, concentration, and composition, examined reproductive mode and identified pollinators. P. interior has a purple, infundibuliform, zygomorphic corolla with a short and wide tube and blue pollen. Flower opening and pollen release were asynchronous throughout the day. The pollen grains have pollenkitt on the surface. The nectar sugar composition has a proportion of sucrose lower than the proportion of glucose + fructose, and the nectar supply was constant, in small amounts, at a concentration between 16.6-23.1 %. The reproductive system is xenogamous and bees were the exclusive pollinators. P. interior exhibits a set of floral traits that prevent self-pollination and maintains attractiveness to the bees. The greater reproductive success under natural conditions highlights the importance of bees for the reproductive success of P. interior. As far as floral traits are concerned, only the sugar concentration in the nectar does not correspond to melittophily.
ResumoDiante de um provável cenário de colapso ambiental, diversas iniciativas em defesa da biodiversidade e da vida surgem em um amplo campo de correlações de força na sociedade. Apesar de que o movimento estudantil nacional da biologia colabora na promoção da discussão de temas relacionados à biodiversidade, são escassos os trabalhos na literatura que abordam as contribuições desse movimento na discussão da temática biodiversidade. No presente artigo, objetivou-se conduzir uma discussão acerca da temática biodiversidade e, concomitantemente, destacar algumas ações do movimento estudantil nacional da biologia em defesa da biodiversidade e da vida. Em um primeiro momento, discutiu-se que a biodiversidade presta diversos serviços ecossistêmicos fundamentais para a manutenção da vida na Terra, e que as ações antrópicas impactam os seus indicadores. Em sequência, discutiu-se que a defesa da conservação da biodiversidade encontra-se nas ações e nos princípios defendidos pelo movimento estudantil nacional da biologia. Conclui-se que as ações em defesa da biodiversidade constituem-se em iniciativas populares de caráter emancipatório.Palavras-chave: Conservação; Impactos Antrópicos; Indicadores de Biodiversidade. AbstractFaced with a probable scenario of environmental collapse, several initiatives in defense of biodiversity and life arise in a wide field of correlations of strength in society. Although the national student movement in biology contributes to the promotion of discussion of biodiversity issues, there are few papers in the literature that discuss the contributions of this movement in the discussion of biodiversity. In this article, the objective was to conduct a discussion about the biodiversity theme and, at the same Dossiê Temático: Recebido em 02/06/2018
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