Pineapple

The pineapple is indigenous to South America, specifically the Paraná–Paraguay River basin between southern Brazil and Paraguay. Domestication by indigenous peoples occurred long before European contact, spreading the plant throughout Central and South America and the Caribbean. It was encountered by Christopher Columbus on his second voyage in 1493 on the island of Guadeloupe, who introduced it to Europe. From there, Spanish and Portuguese explorers disseminated it to Africa, Asia, and the Pacific islands.

The pineapple plant is a short, stocky perennial herb typically growing 1.0 to 1.5 meters tall.

Leaves:
• A rosette of 30 to 50 long, narrow, sword-shaped leaves
• Leaves are tough, waxy, and fibrous with serrated or spiny margins, though spineless cultivars exist
• Leaf color ranges from dark green to variegated with red, purple, or yellow tinges depending on cultivar and light exposure
• Leaves contain specialized water-absorbing trichomes (scales) on their surfaces

Inflorescence and Fruit:
• The terminal inflorescence emerges from the center of the rosette on a stalk up to 15 cm long
• It bears 100 to 200 individual purple or red flowers, each subtended by a bract
• Flowers are perfect (bisexual) and self-sterile in most commercial cultivars, leading to seedless fruit development through parthenocarpy
• The edible structure is a syncarp (multiple fruit) formed by the fusion of the individual fruitlets (berries) with each other and the central axis of the inflorescence
• The tough, waxy outer rind is composed of hexagonal "eyes" which are the remnants of the individual flowers and their bracts
• A terminal crown of short, stiff leaves surmounts the fruit

As a CAM plant, the pineapple is highly adapted to hot, dry environments.

Water Use Efficiency:
• Stomata remain closed during the day to reduce water loss and open at night to absorb carbon dioxide
• This adaptation makes the plant 5 to 10 times more water-efficient than typical C3 plants
• The leaf rosette acts as a funnel, channeling rainwater and dew toward the central stem and root zone, where it can be absorbed by the trichomes

Pollination:
• In the wild, flowers are pollinated by hummingbirds and certain species of bats
• For commercial production, pollination is actively prevented to avoid seed formation, which reduces fruit quality and market value
• The import of hummingbirds is banned in Hawaii for this reason

A 100-gram serving of raw pineapple provides significant nutritional value.

Key Nutrients:
• Vitamin C: 47.8 mg (approximately 80% of the Daily Value), a potent water-soluble antioxidant
• Manganese: 0.9 mg (approximately 45% of the Daily Value), a critical cofactor for several enzymes
• Bromelain: a mixture of proteolytic enzymes unique to pineapple, which aids in protein digestion
• Dietary Fiber: 1.4 g
• Energy: 50 kcal
• Natural sugars: ~10 g, primarily sucrose, glucose, and fructose

Potential contraindications and side effects are generally mild:
• Bromelain can cause a tingling or burning sensation on the lips, tongue, and oral mucosa in some individuals due to its protein-digesting action on sensitive tissues
• Unripe fruit is highly acidic and can have a strong purgative effect
• Bromelain may interact with anticoagulant medications (e.g., warfarin) and should be consumed with caution by individuals on such drugs

Pineapples are commercially propagated vegetatively, as seeds are rare and do not grow true-to-type.

Propagation Materials:
• Crowns: the leaf cluster on top of the fruit
• Slips: leafy shoots arising from the fruit stalk below the fruit
• Suckers: shoots arising from leaf axils on the main stem
• Ratoons: shoots arising from underground portions of the stem

Planting and Growth Cycle:
• Planting material is dried for several days to cure and prevent rot before planting
• Soil: well-drained, sandy loam with a pH of 4.5 to 6.5 is ideal; pineapple tolerates acidic soils poorly tolerated by other crops
• Spacing: plants are typically set in double-row beds with 30–45 cm between plants
• The plant crop (first harvest) cycle is typically 18 to 24 months from planting
• A ratoon crop (second harvest from the same plant) can be produced 12 to 18 months later

Forcing:
• Commercial production often uses chemical forcing agents like ethylene or calcium carbide to induce synchronous flowering, allowing for scheduled harvests

The pineapple is one of the world's most commercially important tropical fruits, with major production in Costa Rica, the Philippines, Brazil, and Thailand.

Primary Uses:
• Fresh consumption as a dessert fruit
• Processing into canned slices, chunks, and crushed pineapple
• Juice production, which is a major global industry
• Bromelain extraction for use as a meat tenderizer, dietary supplement, and in pharmaceutical applications

Byproducts:
• Leaves yield strong white fibers (piña fiber) used in the Philippines for fine, lace-like textiles and traditional garments
• Fruit processing waste (peels, cores) is used for animal feed, biogas production, and as a substrate for vinegar fermentation