Nocturnal Bee Pollinators Are Attracted to Guarana Flowers by Their Scents - Krug, Cristiane; Cordeiro, Guaraci D; Schäffler, Irmgard; Silva, Cláudia I; Oliveira, Reisla; Schlindwein, Clemens; Dötterl, Stefan; Alves-dos-Santos, Isabel (Frontiers in Plant Science, 2018)