Abstract
Nutritional eustress such as salinity or nutrient stress applied in soilless systems, is a convenient pre-harvest factor efficient in modulating the phytochemical components of horticultural crops, by triggering defensive mechanisms and accumulating plant secondary metabolites in plants tissues. Nevertheless, genetic material (cultivars with different pigmentation) dictates lettuce metabolites and physiological response to extrinsic eustress, with red leaf cultivars being highly nutrient packed notwithstanding the stress. Product quality can be meliorated equally by applying several cuts, a practice proven to increase bioactive compounds accumulation. In this study, we analyzed the effects of four salinity levels (1, 10, 20 and 30 mM NaCl) on green and red pigmented Salad Bowl lettuce (Lactuca sativa L. var. acephala) in two successive harvests cultivated in a floating raft system. The morphological parameters, mineral composition, leaf gas exchanges, bioactive compounds, and antioxidant activity of both cultivars were assessed. The green cultivar exhibited superior crop productivity but was more prone to salinity effect than the red cultivar. Irrespective of cultivar and cut order, the net photosynthesis decreased with increasing salinity in the nutrient solution. The second cut incurred higher dry biomass, greater accumulation of most minerals and higher photosynthetic activity. In red lettuce, 20 mM NaCl proved adequate eustress to increase phytonutrients and beneficial minerals (K, Ca, and Mg) with minimal loss of yield. Mild salinity and sequential harvest have proven effective pre-harvest tools in positively modulating the quality of lettuce. Eustress interaction with genotype was demonstrated as a promising field for future breeding programs targeting select genotypes for agronomic application of eustress to improve the nutraceutical value of vegetable crops.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Green lettuce had superior crop productivity.
- Taxon
- lettuce
Lactuca sativat0 - Material
- green cultivare0
- Outcome
- crop productivitye0
- Direction
- superiore0
- Comparator
- red cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The green cultivar exhibited superior crop productivity but was more prone to salinity effect than the red cultivar.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
Green lettuce was more prone to salinity effects than red lettuce.
- Taxon
- lettuceLactuca sativat0
- Material
- green cultivare0
- Outcome
- salinity effecte0
- Direction
- more pronee0
- Comparator
- red cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The green cultivar exhibited superior crop productivity but was more prone to salinity effect than the red cultivar.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
Net photosynthesis declined as salinity increased regardless of cultivar or cut.
- Taxon
- lettuceLactuca sativat0
- Treatment
- increasing salinity in the nutrient solutione0
- Outcome
- net photosynthesise0
- Direction
- decreasede0
- Qualifier
- Irrespective of cultivar and cut ordere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrespective of cultivar and cut order, the net photosynthesis decreased with increasing salinity in the nutrient solution.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
The second cut had higher dry biomass.
- Taxon
- lettuceLactuca sativat0
- Treatment
- second cute0
- Outcome
- dry biomasse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The second cut incurred higher dry biomass, greater accumulation of most minerals and higher photosynthetic activity.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
The second cut accumulated more of most minerals.
- Taxon
- lettuceLactuca sativat0
- Treatment
- second cute0
- Outcome
- accumulation of most mineralse0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The second cut incurred higher dry biomass, greater accumulation of most minerals and higher photosynthetic activity.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
The second cut had higher photosynthetic activity.
- Taxon
- lettuceLactuca sativat0
- Treatment
- second cute0
- Outcome
- photosynthetic activitye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The second cut incurred higher dry biomass, greater accumulation of most minerals and higher photosynthetic activity.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
At 20 mM NaCl, red lettuce had increased phytonutrients with minimal yield loss.
- Taxon
- lettuceLactuca sativat0
- Material
- red lettucee0
- Treatment
- 20 mM NaCle0
- Outcome
- phytonutrientse0
- Direction
- increasee0
- Qualifier
- minimal loss of yielde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In red lettuce, 20 mM NaCl proved adequate eustress to increase phytonutrients and beneficial minerals (K, Ca, and Mg) with minimal loss of yield.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
At 20 mM NaCl, red lettuce had increased beneficial minerals.
- Taxon
- lettuceLactuca sativat0
- Material
- red lettucee0
- Treatment
- 20 mM NaCle0
- Outcome
- beneficial minerals (K, Ca, and Mg)e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In red lettuce, 20 mM NaCl proved adequate eustress to increase phytonutrients and beneficial minerals (K, Ca, and Mg) with minimal loss of yield.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
Claim · model-written summary
At 20 mM NaCl, red lettuce had minimal yield loss.
- Taxon
- lettuceLactuca sativat0
- Material
- red lettucee0
- Treatment
- 20 mM NaCle0
- Outcome
- yielde0
- Direction
- losse0
- Qualifier
- minimale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In red lettuce, 20 mM NaCl proved adequate eustress to increase phytonutrients and beneficial minerals (K, Ca, and Mg) with minimal loss of yield.”
t0“Salad Bowl lettuce (Lactuca sativa L. var. acephala)”
The same questions in other papers
sodium chloride · yield · Lactuca sativa (garden lettuce)Results differ
4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
2 papers more in this group
See all 6 papers →sodium chloride · nutrient: content · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
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.