Abstract
The use of substances attenuating the harmful effects of salts on plants is an important strategy for the use of salt water in agriculture. The objective of this work was to evaluate the growth, gas exchange and biomass accumulation of passion fruit seedlings (Passiflora edulis Sims) irrigated with salt water due to the application of salt stress attenuators. The experiment was carried out in a randomized complete block design, in a 5 x 3 x 2 factorial scheme, with three replications, referring to the electrical conductivities of the irrigation water (1.5, 2.5, 3.5, 4.5 and 5.5 dS m-1), three doses of humic acids (0, 10 and 20 mL) and two doses of citric acid (0 and 10 mL) as attenuators, respectively. Increased salinity of irrigation water reduced growth, accumulation of dry shoot biomass and gas exchange (stomatal conductance, transpiration, net photosynthesis, CO2 internal concentration) of passion fruit sourced seedlings. Citric acid did not attenuate the negative effects of the salts and negatively interfered in the growth and accumulation of dry biomass of the shoots of passion fruit, mainly to the seedlings irrigated with water of low salinity. Humic substances at a dose of 20 mL promoted higher growth of passion fruit sprouts but were not sufficient to attenuate the negative effects of irrigation water salts. Therefore, citric acid and humic substances, under the conditions of the study, are not an option to use saline water in the production of passion fruit seedlings
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Claims 8
Claim · model-written summary
Increasing irrigation salinity reduced seedling growth and shoot biomass.
- Taxon
- passion fruit seedlings
Passiflora edulist0 - Treatment
- Increased salinity of irrigation watere0
- Outcome
- growth, accumulation of dry shoot biomasse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased salinity of irrigation water reduced growth, accumulation of dry shoot biomass and gas exchange (stomatal conductance, transpiration, net photosynthesis, CO2 internal concentration) of passion fruit sourced seedlings.”
t0“passion fruit seedlings”
Claim · model-written summary
Increasing irrigation salinity reduced stomatal conductance, transpiration and net photosynthesis.
- Taxon
- passion fruit seedlingsPassiflora edulist0
- Treatment
- Increased salinity of irrigation watere0
- Outcome
- stomatal conductance, transpiration, net photosynthesise0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased salinity of irrigation water reduced growth, accumulation of dry shoot biomass and gas exchange (stomatal conductance, transpiration, net photosynthesis, CO2 internal concentration) of passion fruit sourced seedlings.”
t0“passion fruit seedlings”
Claim · model-written summary
Increasing irrigation salinity reduced internal CO2 concentration.
- Taxon
- passion fruit seedlingsPassiflora edulist0
- Treatment
- Increased salinity of irrigation watere0
- Outcome
- CO2 internal concentratione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased salinity of irrigation water reduced growth, accumulation of dry shoot biomass and gas exchange (stomatal conductance, transpiration, net photosynthesis, CO2 internal concentration) of passion fruit sourced seedlings.”
t0“passion fruit seedlings”
Claim · model-written summary
Citric acid did not attenuate adverse salt effects.
- Taxon
- passion fruit seedlingsPassiflora edulist0
- Treatment
- Citric acide0
- Outcome
- negative effects of the saltse0
- Direction
- did not attenuatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citric acid did not attenuate the negative effects of the salts”
t0“passion fruit seedlings”
Claim · model-written summary
Citric acid harmed growth and shoot dry biomass, especially at low salinity.
- Taxon
- passion fruit seedlingsPassiflora edulist0
- Treatment
- Citric acide0
- Outcome
- growth and accumulation of dry biomass of the shootse0
- Direction
- negatively interferede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citric acid did not attenuate the negative effects of the salts and negatively interfered in the growth and accumulation of dry biomass of the shoots of passion fruit, mainly to the seedlings irrigated with water of low salinity.”
t0“passion fruit seedlings”
Claim · model-written summary
Humic substances at 20 mL promoted greater sprout growth.
- Taxon
- passion fruit seedlingsPassiflora edulist0
- Treatment
- Humic substances at a dose of 20 mLe0
- Outcome
- growth of passion fruit sproutse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Humic substances at a dose of 20 mL promoted higher growth of passion fruit sprouts”
t0“passion fruit seedlings”
Claim · model-written summary
Humic substances did not sufficiently attenuate saline water harm.
- Taxon
- passion fruit seedlingsPassiflora edulist0
- Treatment
- Humic substances at a dose of 20 mLe0
- Outcome
- negative effects of irrigation water saltse0
- Direction
- were not sufficient to attenuatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Humic substances at a dose of 20 mL promoted higher growth of passion fruit sprouts but were not sufficient to attenuate the negative effects of irrigation water salts.”
t0“passion fruit seedlings”
Claim · model-written summary
The authors advise against citric acid and humic substances for saline water in passion fruit seedling production under the study conditions.
- Taxon
- passion fruit seedlingsPassiflora edulise0
- Outcome
- not an option to use saline water in the production of passion fruit seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“citric acid and humic substances, under the conditions of the study, are not an option to use saline water in the production of passion fruit seedlings”
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