strawberry, (genus Fragaria), genus of more than 20 species of flowering plants in the rose family (Rosaceae) and their edible fruit. Strawberries are native to the temperate regions of the Northern Hemisphere, and cultivated varieties are widely grown throughout the world. The fruits are rich in vitamin C and are commonly eaten fresh as a dessert fruit, are used as a pastry or pie filling, and may be preserved in many ways. Strawberry shortcake—made of fresh strawberries, sponge cake, and whipped cream—is a traditional American dessert.
Physical description
Strawberries are low-growing herbaceous plants with a fibrous root system and a crown from which arise basal leaves. The leaves are compound, typically with three leaflets, sawtooth-edged, and usually hairy. The flowers, generally white, rarely reddish, are borne in small clusters on slender stalks arising, like the surface-creeping stems, from the axils of the leaves. As a plant ages, the root system becomes woody, and the “mother” crown sends out runners (e.g., stolons) that touch ground and root, thus enlarging the plant vegetatively. Botanically, the strawberry fruit is considered an “accessory fruit” and is not a true berry. The flesh consists of the greatly enlarged flower receptacle and is embedded with the many true fruits, or achenes, which are popularly called seeds.
Cultivation
The cultivated large-fruited strawberry (Fragaria ×ananassa) originated in Europe in the 18th century. Most countries developed their own varieties during the 19th century, and those are often specially suitable for the climate, day length, altitude, or type of production required in a particular region. Strawberries are produced commercially both for immediate consumption and for processing as frozen, canned, or preserved berries or as juice. Given the perishable nature of the berries and the unlikelihood of mechanical picking, the fruit is generally grown near centres of consumption or processing and where sufficient labour is available. The berries are handpicked directly into small baskets and crated for marketing or put into trays for processing. Early crops can be produced under glass or plastic covering. Strawberries are very perishable and require cool dry storage.
The strawberry succeeds in a surprisingly wide range of soils and situations and, compared with other horticultural crops, has a low fertilizer requirement. It is, however, susceptible to drought and requires moisture-retaining soil or irrigation by furrow or sprinkler. Additionally, the plants are susceptible to nematodes and pathogenic soil fungi, and many growers sterilize the soil with chemicals such as methyl bromide prior to planting. Runner plants are planted in early autumn if a crop is required the next year. If planted in winter or spring, the plants are deblossomed to avoid a weakening crop the first year. Plants are usually retained for one to four years. Runners may be removed from the spaced plants, or a certain number may be allowed to form a matted row alongside the original parent plants. In areas with severe winters, plants are put out in the spring and protected during the following winters by covering the rows with straw or other mulches.
Nutrition facts
Strawberries mainly consist of water (91%) and carbohydrates (7.7%). They contain only minor amounts of fat (0.3%) and protein (0.7%).
The nutrients in 3.5 ounces (100 grams) of raw strawberries are:
- Calories: 32
- Water: 91%
- Protein: 0.7 grams
- Carbs: 7.7 grams
- Sugar: 4.9 grams
- Fiber: 2 grams
- Fat: 0.3 grams
Carbs
Fresh strawberries are very high in water, so their total carb content is very low — fewer than 8 grams of carbs per 3.5 ounces (100 grams).
The net digestible carb content is fewer than 6 grams in the same serving size.
Most of these berries’ carbs come from simple sugars — such as glucose, fructose, and sucrose — but they also contain a decent amount of fiber.
Strawberries have a glycemic index (GI) score of 40, which is relatively low.
This means that strawberries should not lead to big spikes in blood sugar levels and are considered safe for people with diabetes.
Fiber
Fiber comprises around 26% of the carb content of strawberries.
One 3.5-ounce (100-gram) serving of strawberries provides 2 grams of fiber — both soluble and insoluble.
Dietary fibers are important to feed the friendly bacteria in your gut and improve digestive health. They are also useful for weight loss and can help prevent many diseases.
The most abundant vitamins and minerals in strawberries are:
- Vitamin C. Strawberries are an excellent source of vitamin C, an antioxidant necessary for immune and skin health.
- Manganese. Frequently found in high amounts in whole grains, legumes, fruits, and vegetables, this trace element is important for many processes in your body.
- Folate (vitamin B9). One of the B vitamins, folate is important for normal tissue growth and cell function — and fundamental for pregnant women and older adults.
- Potassium. This mineral is involved in many essential body functions, such as regulating blood pressure.
To a lesser extent, strawberries also provide iron, copper, magnesium, phosphorus, and vitamins B6, K, and E.
Strawberries are loaded with antioxidants and beneficial plant compounds, including:
- Pelargonidin. The main anthocyanin in strawberries, this compound is responsible for the bright red color.
- Ellagic acid. Found in high amounts in strawberries, ellagic acid is a polyphenol antioxidant that may have many health benefits.
- Ellagitannins. Related to ellagic acid, ellagitannins are converted to ellagic acid in your gut.
- Procyanidins. These are antioxidants commonly found in strawberry flesh and seeds that may have beneficial health effects.
Ellagitannins and ellagic acid
Strawberries are consistently ranked among the top sources of phenolic antioxidants — with levels 2–11 times greater than other fruits.
Ellagitannins and ellagic acid comprise a large part of these antioxidants in strawberries.
They have received considerable attention and have been linked to numerous health benefits. This includes fighting bacteria and a reduced risk of cancer.
The main ellagitannin in strawberries is sanguiin H-6.
