Solanum pimpinellifolium
| Currant tomato (Solanum pimpinellifolium) | |
|---|---|
| Scientific name | Solanum pimpinellifolium |
| Family | Solanaceae |
| Order | Solanales |
| Genus | Solanum |
| Native range | Galápagos, Ecuador, Peru, and northern Chile[1] |
| Growth habit | Climbing shrub; indeterminate garden growth is also described[1][7] |
| Fruit | Very small, red, currant- or pea-sized fruit[4][7] |
Solanum pimpinellifolium, commonly called currant tomato, Everglades tomato, or wild tomato, is a wild tomato native from the Galápagos and Ecuador through Peru to Chile's Atacama region.[1] Its native populations occupy markedly different climates, from tropical rainforest to cold arid desert, and that geographic variation is reflected in its genetics and morphology.[2] The species is facultatively autogamous and produces small red fruit.[4]
Description[edit | edit source]
Kew describes S. pimpinellifolium as a climbing shrub. In garden conditions it can remain indeterminate and sprawling: a South Florida account describes plants exceeding 12 feet and needing a trellis or other support.[1][7] Fruit size, truss form, flower number, and other plant traits vary among accessions. In a replicated greenhouse comparison, North Peruvian material commonly formed long trusses with many flowers, while accessions from dry Ica and hot-wet Manabí showed different stress-associated morphology.[3]
The species has been important as tomato germplasm rather than only as a curiosity. Accession LA2093 supplied a chromosome-scale genome resource, and comparative work documents structural variation and breeding value for disease resistance, abiotic-stress tolerance, and fruit-quality traits.[5] Those findings concern particular accessions and breeding resources; they do not mean that every plant has the same stress response or fruit characters.
Cultivation[edit | edit source]
Soil and water[edit | edit source]
The native range includes both dry coastal country and much wetter tropical climates, so drainage and irrigation need to be matched to the local population and growing site.[2] A comparative cultivation trial used loamy sand, drip irrigation, one-stem pruning, and vertical-string training. Freely draining soil with controlled watering and a support system is therefore a reasonable starting point, but the trial conditions are not a universal soil prescription.[3]
Avoid treating accession-specific salinity results as permission to irrigate with saline water. In a comparative field trial, accession LA0480 had a higher salinity-tolerance index than the cultivated tomato comparator Heinz 1706 under the tested conditions; the result is accession-specific and does not establish a species-wide salinity threshold.[4]
Sun and humidity[edit | edit source]
South Florida garden practice places the plant in full sun, and an institutional garden account describes growth through torrid summers.[8] The broad native climate range means that full-sun performance should be interpreted with attention to water supply, airflow, and the provenance of the seed rather than as a fixed tolerance claim for every accession.[2] A trellis or other substantial support is useful for the long, sprawling growth described in warm-climate gardens.[7]
Seasonal changes[edit | edit source]
Native populations are associated with contrasting wet, warm, and arid-cool climate regimes rather than one uniform seasonal pattern.[2] In warm South Florida gardens, fallen fruit can produce volunteer regrowth, and plants may continue through hot weather; the observation is local and should not be treated as a universal overwintering or hardiness limit.[8] During a cool or dry period, adjust irrigation to the plant's actual growth and fruit load instead of following a fixed calendar schedule.
Propagation[edit | edit source]
Seed is the documented propagation route in the available species-specific procedure. One greenhouse seed-to-seed method uses overnight treatment at 4 °C, optional seed-coat nicking, a pre-moistened growing mix, sowing at 2–4 cm, a heat mat, and a cover. Emergence commonly takes 1–2 weeks, although some seed lots take another 2–4 weeks; the procedure explicitly allows for genotype-dependent delay.[6]
The same procedure transplants seedlings at about 20–30 cm, then uses staking, pruning, assisted pollination, and mesh bags over fruit clusters for controlled seed saving. Cleaned seed is stored at room temperature in that procedure. These are working greenhouse conditions, not guaranteed requirements for every seed lot or outdoor site.[6]
Flowering, fruiting, and harvest[edit | edit source]
S. pimpinellifolium is facultatively autogamous, so flowers can set seed without obligate outcrossing, but the species-specific greenhouse procedure still uses assisted pollination when controlled seed production is wanted.[4][6] Flower number and truss structure vary among accessions; North Peruvian accessions in one greenhouse comparison commonly produced long trusses with many flowers.[3]
Ripe fruit is red and very small. South Florida observations describe currant-sized fruit with strong or rich flavor, thin skin, and tender texture. Those fruit-quality descriptions are useful garden observations but are geographically and contextually qualified rather than universal sensory standards.[7] The greenhouse seed-saving procedure bags clusters, harvests ripe fruit, and cleans the seed afterward; ripe fruit can be held at 4 °C for up to two weeks under that procedure.[6]
Fruit and uses[edit | edit source]
The tiny red fruit is suited to fresh tasting and seed saving when harvested ripe. Its small size can make picking laborious, while the thin skin and tender texture described in South Florida limit keeping after harvest.[7] A GrowingFruit.org discussion preserves contrasting individual experiences: one grower described local adaptation, reseeding, bird-spread volunteers, and pea-sized fruit, while other participants found some currant types sprawling, messy to pick, not especially early, or vulnerable to disease. These reports support contextual variability only; they do not establish a general yield, earliness, or disease-resistance claim.[9]
References[edit | edit source]
- ↑ [2] The climatic association of population divergence and future extinction risk of Solanum pimpinellifolium.
- ↑ [3] Morphoagronomic characterization and whole-genome resequencing of eight highly diverse wild and weedy S. pimpinellifolium and S. lycopersicum var. cerasiforme accessions.
- ↑ [4] The Genome Sequence of the Wild Tomato Solanum pimpinellifolium Provides Insights Into Salinity Tolerance.
- ↑ [5] Genome of Solanum pimpinellifolium provides insights into structural variants during tomato breeding.
- ↑ [9] Everbearing Tomato?.