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Purple bacteria or purple photosynthetic bacteria are Gram-negative proteobacteria that are phototrophic, capable of producing their own food via photosynthesis. They are pigmented with bacteriochlorophyll a or b , together with various carotenoids , which give them colours ranging between purple, red, brown, and orange.
Purple Corn. Purple corn (Spanish: maíz morado) or purple maize is group of flint maize varieties (Zea mays indurata) originating in South America, descended from a common ancestral variety termed "kʼculli" in Quechua. It is most commonly grown in the Andes of Peru, Bolivia and Ecuador.
Black rice has a deep black color and usually turns deep purple when cooked. Its dark purple color is primarily due to its anthocyanin content, which is higher by weight than that of other colored grains. It is suitable for creating porridge, dessert, traditional Chinese black rice cake, bread, and noodles.
This substance makes the cochineal insect appear white or grey from the outside, though the body of the insect and its nymphs produces the red pigment, which makes the insides of the insect look dark purple. Adult males can be distinguished from females in that males have wings, and are much smaller. Cochineal on opuntia in California
Ube has stunningly bright purple flesh and a sweet, nutty flavor with hints of vanilla and pistachio, which is why it’s long been a central ingredient in Filipino desserts and some savory dishes.
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The red cabbage (purple-leaved varieties of Brassica oleracea Capitata Group) is a kind of cabbage, also known as Blaukraut after preparation. Its leaves are coloured dark red/purple. However, the plant changes its colour according to the pH value of the soil due to a pigment belonging to anthocyanins. [1]
Red onions (also known as purple or blue onions in some mainland European countries) are cultivars of the onion (Allium cepa), and have purplish-red skin and white flesh tinged with red. They are most commonly used in cooking, but the skin has also been used as a dye .
It is particularly popular due to the striking violet-purple color it gives to desserts. [20] [21] [24] Purple yam is commonly confused with purple/violet varieties of sweet potatoes because of their similarities in color, taste, and culinary uses.
Another form of recycling of inorganic nutrients and dissolved organic matter by purple sulfur bacteria is through the food chain; they act as a source of food to other organisms. Some purple sulfur bacteria have evolved to optimize their environmental conditions for their own growth.
The bell pepper (also known as sweet pepper, pepper, capsicum / ˈkæpsɪkəm / [1] or in some places, mangoes [2]) is the fruit of plants in the Grossum Group of the species Capsicum annuum. [3] [4] Cultivars of the plant produce fruits in different colors, including red, yellow, orange, green, white, chocolate, candy cane striped, and purple.