Polínia

 Nota: Este artigo é sobre o termo botânico. Para o termo da glaciologia, veja Polínia (glaciologia).

Polínia é uma massa cerosa constituída por grãos de pólen e uma substância viscosa e transparente, presente nos estames de algumas flores, principalmente nas orquidáceas e asclepiadaceae. Ao conjunto de polínias dá-se o nome polinário. A polínia fica presa ao resto da flor por uma estrutura denominada caudículo, ligado por sua vez a um disco granuloso chamado retináculo.[1]

Durante a polinização, a polínia, ou o polinário, ficam grudados ao corpo do polinizador, sendo depois capturados pelo estigma de outra flor visitada pelo agente polinizador, fecundando-a.

Referências

  1. «Polínia». Encyclopædia Britannica Online (em inglês). Consultado em 5 de outubro de 2020 
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