Abstract
It is known that lettuce (Lactuca sativa L. var. crispa L.) phenological stage and environmental changes can cause changes in the plant cell morphology and an important variation in secondary plant metabolites. Antioxidant compounds are beneficial to health and salinity can increase them. The aim of this study was to determine the effect of salt concentration (NaCl 0.05 and 0.1 mol L -1 ) and harvest time (days 10, 20 and 30) on mass, color parameters, antioxidant compounds and proline concentration as well as the morphological tissue changes on two lettuce cultivars: Lollo Bionda 'Levistro' (green leaves) and Lollo Rosso 'Carmoli' (red leaves). NaCl treatments and time of harvest affected fresh matter (FM), DM and DM%, total phenol content, concentration of anthocyanin and antioxidant capacity of both cultivars. High NaCl concentrations decreased FM (from 16.8 to 8.7 g in 'Levistro' in 3 rd harvest) and the intracellular space of the leaf tissue but increased the concentration of proline (from 19.6 to 292.2 g 100 g -1 FM in 'Levistro') and antioxidant compounds (from 412.9 to 487.3 mg Trolox eq. 100 g -1 FM in 'Levistro'). In addition, concentrations of antioxidant compounds (from 458.2 to 506.4 mg Trolox eq. 100 g -1 FM in 'Levistro') and cell density were significantly higher in late than early harvested plants. Thus, successive harvesting may lead to higher antioxidant capacities of lettuces leaves. A moderate decline in FM, a higher cell density and proline concentrations may indicate the better adaptability to salinity stress of red 'Carmoli' than the green 'Levistro' lettuces.
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Claims 11
Claim · model-written summary
NaCl treatment and harvest time affected fresh matter, dry matter and dry matter percentage in both lettuce cultivars.
- Taxon
- cultivarse0
- Treatment
- NaCl treatments and time of harveste0
- Outcome
- fresh matter (FM), DM and DM%e0
Not reportedComparatorDirection
Verbatim
e0“NaCl treatments and time of harvest affected fresh matter (FM), DM and DM%, total phenol content, concentration of anthocyanin and antioxidant capacity of both cultivars”
Claim · model-written summary
NaCl treatment and harvest time affected total phenol content and anthocyanin concentration in both lettuce cultivars.
- Taxon
- lettuces
Lactuca sativat0 - Treatment
- NaCl treatments and time of harveste0
- Outcome
- total phenol content, concentration of anthocyanine0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl treatments and time of harvest affected fresh matter (FM), DM and DM%, total phenol content, concentration of anthocyanin and antioxidant capacity of both cultivars”
t0“lettuces”
Claim · model-written summary
NaCl treatment and harvest time affected antioxidant capacity in both lettuce cultivars.
- Taxon
- lettucesLactuca sativat0
- Treatment
- NaCl treatments and time of harveste0
- Outcome
- antioxidant capacitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl treatments and time of harvest affected fresh matter (FM), DM and DM%, total phenol content, concentration of anthocyanin and antioxidant capacity of both cultivars”
t0“lettuces”
Claim · model-written summary
High NaCl reduced fresh matter in Levistro at the third harvest from 16.8 to 8.7 g.
- Taxon
- lettucesLactuca sativat0
- Material
- Levistroe0
- Treatment
- High NaCl concentrationse0
- Outcome
- FMe0
- Direction
- decreasede0
- Value
- from 16.8 to 8.7 ge0
- Qualifier
- 3 rd harveste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuces”
e0“High NaCl concentrations decreased FM (from 16.8 to 8.7 g in 'Levistro' in 3 rd harvest)”
Claim · model-written summary
High NaCl reduced intracellular space in leaf tissue.
- Taxon
- lettucesLactuca sativat0
- Treatment
- High NaCl concentrationse0
- Outcome
- intracellular space of the leaf tissuee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuces”
e0“High NaCl concentrations decreased FM (from 16.8 to 8.7 g in 'Levistro' in 3 rd harvest) and the intracellular space of the leaf tissue”
Claim · model-written summary
High NaCl raised proline concentration in Levistro from 19.6 to 292.2 g 100 g -1 FM.
- Taxon
- lettucesLactuca sativat0
- Material
- Levistroe0
- Treatment
- NaClt0
- Outcome
- concentration of prolinee0
- Direction
- increasede0
- Value
- from 19.6 to 292.2 g 100 g -1 FMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl and harvest time on antioxidant compounds and morphological cell changes in Lollo Bionda and Lollo Rosso lettuces”
e0“increased the concentration of proline (from 19.6 to 292.2 g 100 g -1 FM in 'Levistro')”
Claim · model-written summary
High NaCl raised antioxidant compounds in Levistro from 412.9 to 487.3 mg Trolox eq. 100 g -1 FM.
- Taxon
- lettucesLactuca sativat0
- Material
- Levistroe0
- Treatment
- NaClt0
- Outcome
- antioxidant compoundse0
- Direction
- increasede0
- Value
- from 412.9 to 487.3 mg Trolox eq. 100 g -1 FMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“NaCl and harvest time on antioxidant compounds and morphological cell changes in Lollo Bionda and Lollo Rosso lettuces”
e0“increased the concentration of proline (from 19.6 to 292.2 g 100 g -1 FM in 'Levistro') and antioxidant compounds (from 412.9 to 487.3 mg Trolox eq. 100 g -1 FM in 'Levistro')”
Claim · model-written summary
Late harvested Levistro had significantly higher antioxidant compound concentration than early harvested plants.
- Taxon
- lettucesLactuca sativat0
- Material
- Levistroe0
- Treatment
- latee0
- Outcome
- concentrations of antioxidant compoundse0
- Direction
- highere0
- Value
- from 458.2 to 506.4 mg Trolox eq. 100 g -1 FMe0
- Comparator
- early harvested plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuces”
e0“concentrations of antioxidant compounds (from 458.2 to 506.4 mg Trolox eq. 100 g -1 FM in 'Levistro') and cell density were significantly higher in late than early harvested plants”
Claim · model-written summary
Late harvested lettuce had significantly higher cell density than early harvested lettuce.
- Taxon
- lettucesLactuca sativat0
- Treatment
- latee0
- Outcome
- cell densitye0
- Direction
- highere0
- Comparator
- early harvested plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuces”
e0“concentrations of antioxidant compounds (from 458.2 to 506.4 mg Trolox eq. 100 g -1 FM in 'Levistro') and cell density were significantly higher in late than early harvested plants”
Claim · model-written summary
Successive harvesting may increase antioxidant capacity of lettuce leaves.
- Taxon
- lettucesLactuca sativae0
- Treatment
- successive harvestinge0
- Outcome
- higher antioxidant capacitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“successive harvesting may lead to higher antioxidant capacities of lettuces leaves”
Claim · model-written summary
Red Carmoli may be better adapted to salinity than green Levistro, as suggested by fresh matter, cell density and proline.
- Taxon
- lettucesLactuca sativae0
- Material
- Carmolie0
- Outcome
- better adaptability to salinity stresse0
- Direction
- bettere0
- Qualifier
- A moderate decline in FM, a higher cell density and proline concentrationse0
- Comparator
- Levistroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A moderate decline in FM, a higher cell density and proline concentrations may indicate the better adaptability to salinity stress of red 'Carmoli' than the green 'Levistro' lettuces”
The same questions in other papers
sodium chloride · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- 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.