Paper · 2023 · PLoS ONE

Effects of preharvest sprays of iodine, selenium and calcium on apple biofortification and their quality and storability

Paweł Wójcik

10
claims
20
verbatim quotes
14
citations
4
research areas
✓
Open access · cc-by

Abstract

The low dietary intake of iodine (I) and selenium (Se) by humans leads to serious health and socioeconomic problems. Therefore, enrichment of plants with I and Se using fertilisers containing these micronutrients is commonly recommended. In this study, we examined the impacts of combined spraying of I as iodide or iodate, Se as selenite or selenate, and calcium (Ca) as Ca-chloride on the enrichment of 'Red Jonaprince' (Malus domestica Borth.) apples, as well as fruit quality and their storability. Sprays were applied 2 weeks before harvest at rates of 0.5 kg I, 0.25 kg Se and 7 kg Ca per ha. Trees not sprayed with these nutrients served as controls. The tested sprays caused leaf burn, but they did not affect the cold injury of buds and shoots. Those sprays had no effect on yield, fruit size and russeting or skin colouring. At harvest, sprayed apples contained about 50 times more I and Se and 30% more Ca than the control fruit. After storage, compared to the control fruit, sprayed apples were firmer, had more organic acids and were less susceptible to disorders, such as bitter pit, internal breakdown and decay caused by Neofabraea spp. The results indicate that preharvest spraying with I, Se and Ca at high rates can be recommended to effectively enrich apples with I and Se and to simultaneously improve their storability.

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 10

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sprayed apples contained about 50 times more iodine and selenium than control fruit at harvest.

Treatment
preharvest sprays of iodine, selenium and calciumt0
Outcome
I and See1
Direction
moree1
Value
about 50 timese1
Comparator
control fruite1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e1

“At harvest, sprayed apples contained about 50 times more I and Se and 30% more Ca than the control fruit”

✓ located verbatim in the source · abstract, characters 835–939 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sprayed apples contained 30% more calcium than control fruit at harvest.

Treatment
preharvest sprays of iodine, selenium and calciumt0
Outcome
Cae1
Direction
moree1
Value
30%e1
Comparator
control fruite1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e1

“At harvest, sprayed apples contained about 50 times more I and Se and 30% more Ca than the control fruit”

✓ located verbatim in the source · abstract, characters 835–939 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

After storage, sprayed apples were firmer than control fruit.

Treatment
preharvest sprays of iodine, selenium and calciumt0
Outcome
firmere2
Direction
firmere2
Comparator
control fruite2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e2

“After storage, compared to the control fruit, sprayed apples were firmer, had more organic acids and were less susceptible to disorders, such as bitter pit, internal breakdown and decay caused by Neofabraea spp.”

✓ located verbatim in the source · abstract, characters 941–1152 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

After storage, sprayed apples had more organic acids than control fruit.

Treatment
preharvest sprays of iodine, selenium and calciumt0
Outcome
organic acidse2
Direction
moree2
Comparator
control fruite2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e2

“After storage, compared to the control fruit, sprayed apples were firmer, had more organic acids and were less susceptible to disorders, such as bitter pit, internal breakdown and decay caused by Neofabraea spp.”

✓ located verbatim in the source · abstract, characters 941–1152 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

After storage, sprayed apples were less susceptible to bitter pit, internal breakdown and Neofabraea spp. decay than control fruit.

Treatment
preharvest sprays of iodine, selenium and calciumt0
Interactor
Neofabraea spp.Neofabraeae2pathogen
Outcome
susceptible to disorderse2
Direction
lesse2
Comparator
control fruite2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗
Neofabraea
Neofabraea · Interactor · picture of the genus (one of its species)H.J. Larsen, Bugwood.org · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e2

“After storage, compared to the control fruit, sprayed apples were firmer, had more organic acids and were less susceptible to disorders, such as bitter pit, internal breakdown and decay caused by Neofabraea spp.”

✓ located verbatim in the source · abstract, characters 941–1152 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

Preharvest spraying with I, Se and Ca at high rates can be recommended to enrich apples with I and Se while improving storability.

Outcome
enrich apples with I and See5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e5

“The results indicate that preharvest spraying with I, Se and Ca at high rates can be recommended to effectively enrich apples with I and Se and to simultaneously improve their storability”

✓ located verbatim in the source · abstract, characters 1153–1340 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The sprays had no effect on yield, fruit size or russeting.

Treatment
Those sprayse4
Outcome
yield, fruit size and russetinge4
Direction
no effecte4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e4

“Those sprays had no effect on yield, fruit size and russeting or skin colouring”

✓ located verbatim in the source · abstract, characters 754–833 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The sprays had no effect on skin colouring.

Treatment
Those sprayse4
Outcome
skin colouringe4
Direction
no effecte4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e4

“Those sprays had no effect on yield, fruit size and russeting or skin colouring”

✓ located verbatim in the source · abstract, characters 754–833 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The sprays caused leaf burn on apple trees.

Outcome
leaf burne3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e3

“The tested sprays caused leaf burn, but they did not affect the cold injury of buds and shoots”

✓ located verbatim in the source · abstract, characters 658–752 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The sprays did not affect cold injury of buds and shoots.

Treatment
The tested sprayse3
Outcome
cold injury of buds and shootse3
Direction
did not affecte3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

t0

“preharvest sprays of iodine, selenium and calcium on apple biofortification”

✓ located verbatim in the source · title, characters 11–86 · show in text ↑
e3

“The tested sprays caused leaf burn, but they did not affect the cold injury of buds and shoots”

✓ located verbatim in the source · abstract, characters 658–752 · show in text ↑

calcium atom · molecular: metabolites · Malus domestica (apple)Results differ

19 papers: 15 positive, 4 negative or no effect

14 papers in the same direction as this paper · 4 in the opposite direction

  1. no effect
  2. positive
  3. no effect

15 papers more in this group

See all 19 papers →

calcium atom · nutrient: content · Malus domestica (apple)Results differ

51 papers: 37 positive, 14 negative or no effect

36 papers in the same direction as this paper · 14 in the opposite direction

  1. positive
  2. positive
  3. positive

47 papers more in this group

See all 51 papers →

selenium atom · molecular: metabolites · Malus domestica (apple)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. no effect
See all 2 papers →

selenium atom · nutrient: content · Malus domestica (apple)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

diiodine · molecular: metabolites · Malus domestica (apple)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

application · crop injury · Malus domestica (apple)Positive and negative results

25 papers: 7 positive, 18 negative or no effect

17 papers in the same direction as this paper · 7 in the opposite direction

  1. positive
  2. negative
  3. negative

21 papers more in this group

See all 25 papers →

application · molecular: metabolites · Malus domestica (apple)Positive and negative results

61 papers: 47 positive, 14 negative or no effect

46 papers in the same direction as this paper · 13 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. negative
  3. positive

57 papers more in this group

See all 61 papers →

application · nutrient: content · Malus domestica (apple)Positive and negative results

116 papers: 100 positive, 16 negative or no effect

99 papers in the same direction as this paper · 16 in the opposite direction

  1. positive
  2. positive
  3. positive

112 papers more in this group

See all 116 papers →

8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.