Abstract
In this study, the effects of repeated cycles of drying and rehydration on some physiological traits were assessed in long shelf-life tomatoes cultivated in a typical semi-arid area of Southern Italy. Three Sicilian landraces (‘Custonaci’, ‘Salina’, and ‘Vulcano’) from the germplasm collection at CNR-IBE (Catania, Italy) and a commercial tomato mini-plum (‘Faino Hy., control) were investigated under three water regimes: DRY (no irrigation), IRR (long-season full irrigation) and REW (post-drought rewaterings). Net photosynthetic assimilation rate (Pn), leaf transpiration (E), stomatal conductance (gs), instantaneous water use efficiency (WUEi), leaf intercellular CO2 (Ci, ppm), and leaf temperature (°C), were measured during the growing season. At harvest (late July), fruit production per plant was measured and ripened fruits were analysed for total solids (TS), soluble solids (SS), reducing sugars (RS), vitamin C (AscA), and total phenols (TP). Pn promptly responded to rewatering (REW), quickly increasing immediately after irrigation, and declined with soil drying up. All genotypes had similar physiological pathways in DRY, but in IRR, ‘Faino’ had higher Pn (up to 31 μmol CO2 m−2s−1) and E (up to 18 mmol H2O m−2s−1). Stomatal conductance (gs) after rewatering steeply increased and quickly declined after that. All local landraces had the same gs in IRR and REW. Variations in RWC were less pronounced than those in other physiological parameters. WUEi in REW and DRY proceeded similarly (up to 3 μmol CO2 mmol H2O). Irrigation in REW significantly promoted plant productivity over the DRY control (up to +150% in ‘Vulcano’). TS and SS in REW were lower than those in DRY, but higher (+19 and +7%, respectively) than in IRR. Vitamin C was greater in DRY and REW (26 and 18% higher than in IRR, respectively). TP in all local tomatoes were significantly higher (up to +29% in ‘Vulcano’) than those in the commercial control. Water regime had a minor effect on TP in ‘Custonaci’ and ‘Salina’. Principal Component Analysis (PCA) provided information on the changes in physiological and fruit quality traits in tomatoes in relation to cultivars and water regimes. The results of this study also revealed that a water-saving irrigation strategy where few irrigations are applied after prolonged periods of drought might be profitable in terms of fruit production enhancement in long shelf-life tomatoes and that limited rewaterings in most cases, help retaining high levels of fruit quality traits.
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Claims 15
Claim · model-written summary
Rewatering raised tomato photosynthetic assimilation, which declined as soil dried.
- Taxon
- Tomatoes
Solanum lycopersicumt0 - Treatment
- rewatering (REW)e0
- Outcome
- Pne0
- Direction
- increasinge0
- Comparator
- soil drying upe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pn promptly responded to rewatering (REW), quickly increasing immediately after irrigation, and declined with soil drying up.”
t0“Tomatoes”
Claim · model-written summary
Under full irrigation Faino had higher photosynthetic assimilation, reaching 31 μmol CO2 m−2s−1.
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- Fainoe0
- Treatment
- IRRe0
- Outcome
- Pne0
- Direction
- highere0
- Value
- 31 μmol CO2 m−2s−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in IRR, ‘Faino’ had higher Pn (up to 31 μmol CO2 m−2s−1) and E (up to 18 mmol H2O m−2s−1).”
t0“Tomatoes”
Claim · model-written summary
Under full irrigation Faino had higher leaf transpiration, reaching 18 mmol H2O m−2s−1.
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- Fainoe0
- Treatment
- IRRe0
- Outcome
- Ee0
- Direction
- highere0
- Value
- 18 mmol H2O m−2s−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in IRR, ‘Faino’ had higher Pn (up to 31 μmol CO2 m−2s−1) and E (up to 18 mmol H2O m−2s−1).”
t0“Tomatoes”
Claim · model-written summary
Tomato stomatal conductance rose after rewatering and then quickly declined.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- rewateringe0
- Outcome
- Stomatal conductance (gs)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stomatal conductance (gs) after rewatering steeply increased and quickly declined after that.”
t0“Tomatoes”
Claim · model-written summary
Local tomato landraces had the same stomatal conductance in full irrigation and rewatering regimes.
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- local landracese0
- Outcome
- gse0
- Direction
- samee0
- Comparator
- IRR and REWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All local landraces had the same gs in IRR and REW.”
t0“Tomatoes”
Claim · model-written summary
Relative water content varied less than other tomato physiological parameters.
- Taxon
- TomatoesSolanum lycopersicumt0
- Outcome
- RWCe0
- Direction
- less pronouncede0
- Comparator
- other physiological parameterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variations in RWC were less pronounced than those in other physiological parameters.”
t0“Tomatoes”
Claim · model-written summary
Tomato water use efficiency was similar under rewatering and dry regimes, reaching 3 μmol CO2 mmol H2O.
- Taxon
- TomatoesSolanum lycopersicumt0
- Outcome
- WUEie0
- Direction
- similarlye0
- Value
- 3 μmol CO2 mmol H2Oe0
- Comparator
- REW and DRYe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WUEi in REW and DRY proceeded similarly (up to 3 μmol CO2 mmol H2O).”
t0“Tomatoes”
Claim · model-written summary
Rewatering significantly improved tomato productivity over the dry control, by as much as 150% in Vulcano.
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- Vulcanoe0
- Treatment
- REWe0
- Outcome
- plant productivitye0
- Direction
- promotede0
- Value
- +150%e0
- Comparator
- DRY controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation in REW significantly promoted plant productivity over the DRY control (up to +150% in ‘Vulcano’).”
t0“Tomatoes”
Claim · model-written summary
Rewatering lowered tomato total solids relative to dry conditions but raised them 19% relative to full irrigation.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- REWe0
- Outcome
- TSe0
- Direction
- highere0
- Value
- +19e0
- Comparator
- IRRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TS and SS in REW were lower than those in DRY, but higher (+19 and +7%, respectively) than in IRR.”
t0“Tomatoes”
Claim · model-written summary
Rewatering lowered tomato soluble solids relative to dry conditions but raised them 7% relative to full irrigation.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- REWe0
- Outcome
- SSe0
- Direction
- highere0
- Value
- +7%e0
- Comparator
- IRRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TS and SS in REW were lower than those in DRY, but higher (+19 and +7%, respectively) than in IRR.”
t0“Tomatoes”
Claim · model-written summary
Vitamin C was 26% higher under dry conditions than full irrigation.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- DRYe0
- Outcome
- Vitamin Ce0
- Direction
- greatere0
- Value
- 26e0
- Comparator
- IRRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vitamin C was greater in DRY and REW (26 and 18% higher than in IRR, respectively).”
t0“Tomatoes”
Claim · model-written summary
Vitamin C was 18% higher under rewatering than full irrigation.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- REWe0
- Outcome
- Vitamin Ce0
- Direction
- highere0
- Value
- 18%e0
- Comparator
- IRRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vitamin C was greater in DRY and REW (26 and 18% higher than in IRR, respectively).”
t0“Tomatoes”
Claim · model-written summary
Local tomatoes had significantly more total phenols than the commercial control, up to 29% more in Vulcano.
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- Vulcanoe0
- Outcome
- TPe0
- Direction
- highere0
- Value
- +29%e0
- Comparator
- commercial controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TP in all local tomatoes were significantly higher (up to +29% in ‘Vulcano’) than those in the commercial control.”
t0“Tomatoes”
Claim · model-written summary
Water regime had little influence on phenols in Custonaci and Salina.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Water regimee0
- Outcome
- TPe0
- Direction
- minor effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water regime had a minor effect on TP in ‘Custonaci’ and ‘Salina’.”
t0“Tomatoes”
Claim · model-written summary
The authors suggest limited post-drought irrigation can improve long shelf-life tomato fruit production while retaining quality.
- Taxon
- tomatoesSolanum lycopersicume0
- Outcome
- few irrigations are applied after prolonged periods of droughte0
- Qualifier
- might be profitablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a water-saving irrigation strategy where few irrigations are applied after prolonged periods of drought might be profitable in terms of fruit production enhancement in long shelf-life tomatoes and that limited rewaterings in most cases, help retaining high levels of fruit quality traits.”
The same questions in other papers
rewatering · yield · Solanum lycopersicum (tomato)Positive and negative results
1 in the opposite direction
- negative
rewatering · physiology: photosynthesis · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.