Cacao Tree
Theobroma cacao
Theobroma cacao, commonly known as the cacao or cocoa tree, is a tropical evergreen species …
Wavy-leaved Cacao Tree (Theobroma sinuosum)
Silhouette: T. Michael Keesey
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Theobroma sinuosum: Botanical Profile, Habitat and Germination
Inhabiting the dense, humid rainforests of South America, this unique evergreen tree exhibits fascinating ecological adaptations. Theobroma sinuosum remains a little-known relative of the cultivated cacao tree, adapted strictly to lowland tropical ecosystems. Its survival depends on stable warm temperatures and constant moisture throughout the year.
Taxonomy
- ∟ царство Plantae
- ∟ division Tracheophytes (Vascular Plants)
- ∟ subdivision Spermatophytes (Seed plants)
- ∟ Angiosperms
- ∟ mesangiosperms (Core angiosperms)
- ∟ eudicots
- ∟ Superrosids
- ∟ rosids
- ∟ malvids
- ∟ order Malvales
- ∟ family Malvaceae
- ∟ subfamily Byttnerioideae
- ∟ genus Theobroma (Cacao trees)
- ∟ species Theobroma sinuosum (Wavy-leaved Cacao Tree)
Morphology
This evergreen tree displays a distinctive pseudoapical growth pattern. New shoots develop from buds situated above the spiral of its horizontal, plagiotropic branches. The root system and initial shoot emerge through cryptocotylar hypogeal germination, where the cotyledons remain hidden within the seed coat during the process.
Its seeds possess unique characteristics that influence the survival of the species:
- Low viability: The seeds lose viability very quickly and require immediate optimal conditions to survive.
- Lack of dormancy: Seeds do not experience a resting phase and frequently germinate directly inside the fruit pod.
- High moisture requirement: Successful germination depends on high humidity and temperatures between 20 °C and 30 °C.
Applications
Although not widely cultivated commercially, the seeds of this genus serve as a valuable source of organic compounds. Local communities and researchers recognize the potential of its seeds for extracting fatty oils and nutrient components.
The seeds of the Theobroma genus typically contain:
- Vegetable oils: Comprising up to 50% of the seed mass, useful for fats and lipids.
- Starches: Accounting for approximately 15% of the content.
- Proteins: Making up about 15%, providing nutritional value.
Interesting facts
The extreme sensitivity of this plant to dry periods makes it a strict indicator of undisturbed, wet tropical habitats. Unlike many other trees, its seeds can sprout before even leaving the mother plant, germinating inside the humid cavity of the ripening pod.
Geography of distribution
- Brazil
- Peru
Sources
- World Flora Online (WFO)
- Global Biodiversity Information Facility (GBIF)
- Plants of the World Online (POWO)
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