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Myrciaria dubia (Myrtaceae) is a shrub that produces fruits with high concentrations of ascorbic acid (1380 to 1490 mg 100 g-1 of pulp and 2050 mg 100 g-1 of peel), 20 times more than acerola and 100 times more than lemon. Native to the Amazon region, it occurs naturally on the seasonally-flooded banks of lakes and rivers, but also has been cultivated commercially in terra firme. In this study, phenological observations and fruit yield evaluations were carried out in a natural population of camu-camu in a floodplain habitat and a plantation in terra firme in central Amazonia. Biweekly visits were made over one year to collect data on flowering, fruiting and leaf phenology. At the height of flowering, flower buds were marked and tracked until fruit matured and were harvested for biometrics and seed counting. Fruits varied from 1.01 to 2.73 cm in diameter and 1.14 to 10.87 g in weight and fruit production was higher in the wild stand. Phenology differed between habitats and phenophase synchrony was higher in the natural population. Despite being native to flooplain forests, fruit production in terra firme occurred throughout the year, suggesting that there are few restrictions on fruit development in cultivated plantation.

Phenology and fruit set comparison of camu-camu (Myrciaria dubia) in a natural population and a plantation in the central Amazon, Brazil