Abstract
ABSTRACT The semi-arid region of the Brazilian Northeast has adequate edaphoclimatic conditions for the passion fruit production, but the water used for irrigation commonly has high concentrations of salts that are harmful to the plant growth and development. A previous supply of hydrogen peroxide induces the acclimation of plants under saline stress conditions, reducing deleterious effects on their growth and physiology. This study aimed to evaluate the gas exchanges and growth of passion fruit as a function of irrigation with saline water and exogenous application of hydrogen peroxide. The experiment was carried out under greenhouse conditions, using a randomized block design, in a 4 x 4 factorial arrangement, being four levels of irrigation water electrical conductivity (0.7 dS m-1, 1.4 dS m-1, 2.1 dS m-1 and 2.8 dS m-1) and four hydrogen peroxide concentrations (0 µM, 25 µM, 50 µM and 75 µM), with four replicates and two plants per plot. The hydrogen peroxide application attenuated the deleterious effects of the irrigation water salinity on transpiration, CO2 assimilation rate, internal carbon concentration, plant height and leaf area of yellow passion fruit, at 60 days after sowing, with the concentration of 25 µM being the most efficient. Irrigation using water with electrical conductivity above 0.7 dS m-1 negatively affects the gas exchanges and growth of passion fruit, being the stomatal conductance and leaf area the most sensitive variables to the salt stress.
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Claims 4
Claim · model-written summary
Hydrogen peroxide attenuated salinity damage to transpiration, CO2 assimilation and internal carbon concentration.
- Taxon
- yellow passion fruite0
- Organ / stage
- 60 days after sowinge0
- Treatment
- hydrogen peroxide applicatione0
- Outcome
- transpiration, CO2 assimilation rate, internal carbon concentratione0
- Direction
- attenuatede0
Not reportedComparator
Verbatim
e0“The hydrogen peroxide application attenuated the deleterious effects of the irrigation water salinity on transpiration, CO2 assimilation rate, internal carbon concentration, plant height and leaf area of yellow passion fruit, at 60 days after sowing, with the concentration of 25 µM being the most efficient”
Claim · model-written summary
Hydrogen peroxide attenuated salinity damage to plant height and leaf area, with 25 µM most efficient.
- Taxon
- yellow passion fruite0
- Treatment
- hydrogen peroxide applicatione0
- Outcome
- plant height and leaf areae0
- Direction
- attenuatede0
- Qualifier
- 25 µM being the most efficiente0
Not reportedComparator
Verbatim
e0“The hydrogen peroxide application attenuated the deleterious effects of the irrigation water salinity on transpiration, CO2 assimilation rate, internal carbon concentration, plant height and leaf area of yellow passion fruit, at 60 days after sowing, with the concentration of 25 µM being the most efficient”
Claim · model-written summary
Irrigation water above 0.7 dS m-1 negatively affected passion fruit gas exchange and growth.
- Taxon
- passion fruit
Passiflora edulise0 - Treatment
- water with electrical conductivity above 0.7 dS m-1e0
- Outcome
- gas exchanges and growthe0
- Direction
- negatively affectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation using water with electrical conductivity above 0.7 dS m-1 negatively affects the gas exchanges and growth of passion fruit”
Claim · model-written summary
Stomatal conductance and leaf area were most sensitive to salt stress.
- Taxon
- passion fruitPassiflora edulist0
- Treatment
- salt stresse0
- Outcome
- stomatal conductance and leaf areae0
- Direction
- most sensitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stomatal conductance and leaf area the most sensitive variables to the salt stress”
t0“passion fruit seedlings”
The same questions in other papers
hydrogen peroxide · growth · Passiflora edulis (passion fruit)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
2 papers more in this group
See all 6 papers →hydrogen peroxide · physiology: photosynthesis · Passiflora edulis (passion fruit)Results agree
1 paper in the same direction as this paper
- 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.