Anthocyanins

Basics About Anthocyanin pigments What are the functions of anthocyanins and xanthophylls in plants? Why do plants produce more anthocyanins when stressed for nitrogen? Why are red flowers so rare? Anthocyanins and the Autumn Leaves Why is leaf senescence important to the survival of a plant? How are anthocyanins produced in autumn leaves? Why do leaves change colors in the fall? What is the purpose of purple plum tree leaves being purple? Where to Find Anthocyanins How do flowers get their color? Why and how do certain pH ranges affect beetroot? From where do blue potatoes get their color? Why did our buckwheat turn red? Do bing cherries contain anthocyanins? Can I grow blue tomatoes? Use of Anthocyanins as pH indicators What physical properties of red cabbage juice allow it to be a pH indicator? How do anthocyanins act as pH indicators? Why does red wine or blueberry juice turn blue when diluted with water? How do you find the acid dissociation constant of plant pigments? Why do some flowers fade over vinegar? Use of Anthocyanins in Pigment Chromatography How can you measure the amount of pigment in plants? Do different dyes travel at different rates? How can anthocyanins be separated from a solution of extracted pigment? Other Properties and Uses of Anthocyanins Can anthocyanins inhibit nitrate reductase activity? What parts of a plant cell have medicinal value?

---