Вяночак

Асноўныя часткі кветкі

Вяночак (лац.: corolla) — унутраная, звычайна ярка афарбаваная частка двайнога калякветніка кветкавых раслін. Складаецца з відазмененых лісцікаў (пялёсткаў). Адрозніваюць вяночак раздзельнапялёсткавы, у якім пялёсткі свабодныя (напрыклад, у свірэпы, суніц, зоркаўкі), і зрослапялёсткавы (напрыклад, у шчамяліцы, шалфею, тытуню). Афарбоўка вяночка звычайна залежыць ад асобных пігментаў (антацыянаў і флавонаў), раствораных у клетачным соку пялёсткаў. Вяночак — важная таксанамічная прыкмета, вяночак робіць кветку больш прыкметнай для насякомых і птушак, якія апыляюць расліны, ахоўвае тычынкі і слупкі ад пашкоджанняў, іншы раз выдзяляе нектар.

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