Abstract
Local varieties are known to cope more efficiently with stressful and/or low-input conditions than cultivated ones by activating secondary metabolisms and, hence, are supposed to have higher nutraceutical potential. In this work, we investigate the effects of N and light, supplied at optimal and sub-optimal levels, on the fruit yield and quality of a local ecotype of sweet pepper, Altino, grown in the Abruzzo Region (Southern Italy). In 2017, two open-field experiments were carried out, comparing increasing N rates (0, 100 and 200 kg N ha−1, 0_N, 100_N and 200_N, respectively) and different percentages of shading and/or manipulations of the transmitted solar radiation, obtained through photoselective nets (red net, RN; black net, BN; unshaded Control). Both N and light were preconditions to obtain stable yields in terms of both fruit number and fruit weights. However, BN significantly reduced the number of sunscalded fruits (0.39 vs. 3.38 and 2.59 fruit plant−1 for BN, Control and RN, respectively), leading to lower waste. N deficiency favoured higher total polyphenol (TPC) and flavonoid (TFC) contents in ripened fruits; on the other hand, shading significantly reduced TPC (−12.4%) in immature and TFC (−18.2%) in red fruits. The variations in nutraceuticals were also evaluated in terms of the variations of the single phenolic acids in fruits during ripening; the most interesting results were associated with light treatments. Further research should be directed to the in-depth study of nutrition regimes, in combination with other photoselective nets applications (i.e., pearl nets), that could be suitable for the Altino genotype to enhance the yield and nutraceutical potentials of its fruits.
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
Nitrogen supply was needed for stable fruit number and weight.
- Taxon
- sweet pepper
Capsicum annuumt0 - Treatment
- Ne0
- Outcome
- stable yields in terms of both fruit number and fruit weightse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both N and light were preconditions to obtain stable yields in terms of both fruit number and fruit weights.”
t0“sweet pepper”
Claim · model-written summary
Light supply was needed for stable fruit number and weight.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- lighte0
- Outcome
- stable yields in terms of both fruit number and fruit weightse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both N and light were preconditions to obtain stable yields in terms of both fruit number and fruit weights.”
t0“sweet pepper”
Claim · model-written summary
Black netting reduced sunscalded fruit number relative to control and red netting.
- Taxon
- sweet pepperCapsicum annuumt0
- Treatment
- BNe0
- Outcome
- number of sunscalded fruitse0
- Direction
- reducede0
- Value
- 0.39 vs. 3.38 and 2.59 fruit plant−1e0
- Comparator
- Control and RNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BN significantly reduced the number of sunscalded fruits (0.39 vs. 3.38 and 2.59 fruit plant−1 for BN, Control and RN, respectively)”
t0“sweet pepper”
Claim · model-written summary
Nitrogen deficiency increased total polyphenol content in ripened fruits.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- ripened fruitse0
- Treatment
- N deficiencye0
- Outcome
- total polyphenol (TPC)e0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency favoured higher total polyphenol (TPC) and flavonoid (TFC) contents in ripened fruits”
t0“sweet pepper”
Claim · model-written summary
Nitrogen deficiency increased flavonoid content in ripened fruits.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- ripened fruitse0
- Treatment
- N deficiencye0
- Outcome
- flavonoid (TFC) contentse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency favoured higher total polyphenol (TPC) and flavonoid (TFC) contents in ripened fruits”
t0“sweet pepper”
Claim · model-written summary
Shading reduced total polyphenols in immature fruits by 12.4%.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- immaturee0
- Treatment
- shadinge0
- Outcome
- TPCe0
- Direction
- reducede0
- Value
- −12.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shading significantly reduced TPC (−12.4%) in immature and TFC (−18.2%) in red fruits.”
t0“sweet pepper”
Claim · model-written summary
Shading reduced flavonoids in red fruits by 18.2%.
- Taxon
- sweet pepperCapsicum annuumt0
- Organ / stage
- red fruitse0
- Treatment
- shadinge0
- Outcome
- TFCe0
- Direction
- reducede0
- Value
- −18.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shading significantly reduced TPC (−12.4%) in immature and TFC (−18.2%) in red fruits.”
t0“sweet pepper”
Claim · model-written summary
Light treatments were associated with the most interesting changes in individual phenolic acids during ripening.
- Taxon
- sweet pepperCapsicum annuumt0
- Outcome
- most interesting resultse0
- Qualifier
- light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most interesting results were associated with light treatments.”
t0“sweet pepper”
Claim · model-written summary
The authors recommend more research on nutrition regimes and photoselective nets for Altino fruit yield and nutraceutical potential.
Verbatim
e0“Further research should be directed to the in-depth study of nutrition regimes, in combination with other photoselective nets applications (i.e., pearl nets), that could be suitable for the Altino genotype to enhance the yield and nutraceutical potentials of its fruits.”
The same questions in other papers
nitrogen · quality: phytochemicals · Capsicum annuum (sweet pepper)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →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.