Paper · 2024 · Revista Brasileira de Engenharia Agrícola e Ambiental

Formation of guava seedlings under salt stress and foliar application of hydrogen peroxide

Saulo S. da Silva; Geovani S. de Lima; Jean T. A. Ferreira; et al.

6
claims
6
verbatim quotes
8
citations
3
research areas
✓
Open access · cc-by

Abstract

ABSTRACT The occurrence of water with high concentrations of salts hinders the expansion of irrigated agriculture in the semi-arid region of the Brazilian Northeast, making it necessary to adopt strategies capable of minimizing the effects of salt stress on plants. In this context, the objective of present study was to evaluate the effects of hydrogen peroxide application on water relations, gas exchange, photosynthetic pigments, and growth of guava cv. Paluma under irrigation with saline waters in the seedling formation stage. A randomized block design was used, in a 5 × 4 factorial scheme, with three replicates, with five levels of electrical conductivity of water - ECw (0.3, 1.3, 2.3, 3.3, and 4.3 dS m-1) and four concentrations of hydrogen peroxide - H2O2 (0, 25, 50, and 75 µM). Irrigation water salinity above 0.3 dS m-1 increased electrolyte leakage in the leaf blade and reduced the relative water content, synthesis of photosynthetic pigments, gas exchange, and growth of seedlings of guava cv. Paluma, at 80 days after sowing. Foliar application of hydrogen peroxide at concentrations of up to 75 µM reduces the relative water content in the leaf blade of guava seedlings and did not mitigate the effects of salt stress on guava plants in the seedling formation stage.

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 6

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Irrigation salinity above 0.3 dS m-1 increased leaf electrolyte leakage.

Material
cv. Palumae0
Treatment
Irrigation water salinity above 0.3 dS m-1e0
Outcome
electrolyte leakage in the leaf bladee0
Direction
increasede0
Qualifier
at 80 days after sowinge0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Irrigation water salinity above 0.3 dS m-1 increased electrolyte leakage in the leaf blade and reduced the relative water content, synthesis of photosynthetic pigments, gas exchange, and growth of seedlings of guava cv. Paluma, at 80 days after sowing.”

✓ located verbatim in the source · abstract, characters 794–1046 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Salinity reduced leaf relative water content.

Treatment
Irrigation water salinity above 0.3 dS m-1e0
Outcome
relative water contente0
Direction
reducede0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Irrigation water salinity above 0.3 dS m-1 increased electrolyte leakage in the leaf blade and reduced the relative water content, synthesis of photosynthetic pigments, gas exchange, and growth of seedlings of guava cv. Paluma, at 80 days after sowing.”

✓ located verbatim in the source · abstract, characters 794–1046 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Salinity reduced pigment synthesis and gas exchange.

Treatment
Irrigation water salinity above 0.3 dS m-1e0
Outcome
synthesis of photosynthetic pigments, gas exchangee0
Direction
reducede0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Irrigation water salinity above 0.3 dS m-1 increased electrolyte leakage in the leaf blade and reduced the relative water content, synthesis of photosynthetic pigments, gas exchange, and growth of seedlings of guava cv. Paluma, at 80 days after sowing.”

✓ located verbatim in the source · abstract, characters 794–1046 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Salinity reduced guava seedling growth.

Treatment
Irrigation water salinity above 0.3 dS m-1e0
Outcome
growth of seedlingse0
Direction
reducede0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Irrigation water salinity above 0.3 dS m-1 increased electrolyte leakage in the leaf blade and reduced the relative water content, synthesis of photosynthetic pigments, gas exchange, and growth of seedlings of guava cv. Paluma, at 80 days after sowing.”

✓ located verbatim in the source · abstract, characters 794–1046 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Foliar hydrogen peroxide up to 75 µM reduced relative water content.

Treatment
Foliar application of hydrogen peroxide at concentrations of up to 75 µMe0
Outcome
relative water content in the leaf bladee0
Direction
reducese0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of hydrogen peroxide at concentrations of up to 75 µM reduces the relative water content in the leaf blade of guava seedlings”

✓ located verbatim in the source · abstract, characters 1047–1191 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Foliar hydrogen peroxide did not mitigate salt stress in guava seedling formation.

Treatment
Foliar application of hydrogen peroxide at concentrations of up to 75 µMe0
Outcome
effects of salt stress on guava plantse0
Direction
did not mitigatee0

Not reportedComparator

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

Psidium guajava
Psidium guajava · TaxonFuadsyazwan ( talk ) · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of hydrogen peroxide at concentrations of up to 75 µM reduces the relative water content in the leaf blade of guava seedlings and did not mitigate the effects of salt stress on guava plants in the seedling formation stage.”

✓ located verbatim in the source · abstract, characters 1047–1288 · show in text ↑

application · organism · Psidium guajava (guava)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

application · physiology: water · Psidium guajava (guava)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

2 in the opposite direction

  1. positive
  2. positive
See all 3 papers →

irrigation · physiology: water · Psidium guajava (guava)Positive and negative results

6 papers: 4 positive, 2 negative or no effect

1 paper in the same direction as this paper · 4 in the opposite direction

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

irrigation · physiology: photosynthesis · Psidium guajava (guava)Positive and negative results

7 papers: 2 positive, 5 negative or no effect

4 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. positive
  3. negative

3 papers more in this group

See all 7 papers →

irrigation · growth · Psidium guajava (guava)Positive and negative results

12 papers: 6 positive, 6 negative or no effect

5 papers in the same direction as this paper · 6 in the opposite direction

  1. negative
  2. positive
  3. positive

8 papers more in this group

See all 12 papers →

salinity · physiology: water · Psidium guajava (guava)Results agree

2 papers: 0 positive, 2 negative or no effect

1 paper in the same direction as this paper

  1. negative
See all 2 papers →

salinity · physiology: photosynthesis · Psidium guajava (guava)Results agree

8 papers: 0 positive, 8 negative or no effect

7 papers in the same direction as this paper

  1. negative
  2. negative
  3. negative

4 papers more in this group

See all 8 papers →

salinity · growth · Psidium guajava (guava)Results agree

14 papers: 0 positive, 14 negative or no effect

13 papers in the same direction as this paper

  1. negative
  2. negative
  3. negative

10 papers more in this group

See all 14 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.