Bell Pepper Under a Microscope: Pulp and Skin (40x-1000x)

The bell pepper (also known as sweet pepper, pepper or capsicum) is the fruit of plants in the Grossum cultivar group of the species Capsicum annuum. Cultivars of the plant produce fruits in different colours, including red, yellow, orange, green, white, and purple. Bell peppers are sometimes grouped with less pungent pepper varieties as "sweet peppers". While they are fruits-botanically classified as berries-they are commonly used as a vegetable ingredient or side dish.
Peppers are native to Mexico, Central America, and northern South America. Pepper seeds were imported to Spain in 1493 and then spread through Europe and Asia. The mild bell pepper cultivar was developed in the 1920s, in Szeged, Hungary. Preferred growing conditions for bell peppers include warm, moist soil in a temperature range of 21 to 29 °C (70 to 84 °F).
Like the tomato, bell peppers are botanical fruits but culinary vegetables. Pieces of bell pepper are commonly used in garden salads and as toppings on pizza or cheesesteaks. There are many varieties of stuffed peppers prepared using hollowed or halved bell peppers. Bell peppers (and other cultivars of Capsicum annuum) may be used in the production of the spice paprika.
Bell peppers are 94% water, 5% carbohydrates, and negligible fat and protein (table). They are rich sources of vitamin C, containing 97% of the Daily Value (DV) in a 100 gram reference amount (table). Their vitamin B6 content is moderate (17% DV), with no other micronutrients present in significant amounts (table). Red bell peppers have approximately twice the vitamin C and eight times the vitamin A content than green bell peppers.
The bell pepper is the only member of the genus Capsicum that does not produce capsaicin, a lipophilic chemical that can cause a strong burning sensation when it comes in contact with mucous membranes. They are thus scored in the lowest level of the Scoville scale. This absence of capsaicin is due to a recessive form of a gene that eliminates the compound and, consequently, the "hot" taste usually associated with the rest of the genus Capsicum. This recessive gene is overwritten in the Mexibelle pepper, a hybrid variety of bell pepper that produces small amounts of capsaicin (and is thus mildly pungent). Sweet pepper cultivars produce non-pungent capsaicinoids.