Abstract
ABSTRACT The study was carried out to evaluate the photosynthetic efficiency and growth of yellow passion fruit, cultivated under different levels of irrigation water salinity and exogenous application of hydrogen peroxide. The experiment was carried out in greenhouse of the Universidade Federal de Campina Grande, PB, Brazil, using drainage lysimeters with capacity for 100 dm3, filled with Entisol of sandy texture. The experimental design was randomized blocks using a 4 x 4 factorial scheme, with three repetitions, corresponding to four water salinity (0.7; 1.4; 2.1 and 2.8 dS m-1) and four concentrations of hydrogen peroxide (0, 20, 40 and 60 µM). The different concentrations of hydrogen peroxide were applied by soaking the seed for a period of 24 h and spraying the leaves on the adaxial and abaxial sides. At 35 days after transplanting, the interaction between water salinity and hydrogen peroxide concentrations did not significantly interfere with plant physiology and growth, except for the number of leaves. The hydrogen peroxide did not cause significant effects on any of the evaluated plant variables. Increasing salinity of irrigation water led to reduction in gas exchanges at 61 and 96 days after transplanting. Water salinity inhibited the CO2 assimilation, transpiration, stomatal conductance, instantaneous carboxylation efficiency and stem diameter of passion fruit plants.
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Claims 6
Claim · model-written summary
Salinity and peroxide interacted significantly only for leaf number at 35 days after transplanting.
- Taxon
- yellow passion fruite1
- Treatment
- water salinity and hydrogen peroxide concentrationse0
- Outcome
- number of leavese0
- Qualifier
- 35 days after transplantinge0
Not reportedComparatorDirection
Verbatim
e0“At 35 days after transplanting, the interaction between water salinity and hydrogen peroxide concentrations did not significantly interfere with plant physiology and growth, except for the number of leaves”
e1“yellow passion fruit”
Claim · model-written summary
Salinity and peroxide had no significant interaction for other physiology and growth outcomes at 35 days.
- Taxon
- yellow passion fruite1
- Treatment
- water salinity and hydrogen peroxide concentrationse0
- Outcome
- plant physiology and growthe0
- Qualifier
- 35 days after transplantinge0
Not reportedComparatorDirection
Verbatim
e0“At 35 days after transplanting, the interaction between water salinity and hydrogen peroxide concentrations did not significantly interfere with plant physiology and growth, except for the number of leaves”
e1“yellow passion fruit”
Claim · model-written summary
Hydrogen peroxide had no significant effect on evaluated plant variables.
Not reportedComparatorDirection
Verbatim
e0“The hydrogen peroxide did not cause significant effects on any of the evaluated plant variables”
e1“yellow passion fruit”
Claim · model-written summary
Increasing irrigation salinity reduced gas exchange at 61 and 96 days after transplanting.
- Taxon
- yellow passion fruite1
- Treatment
- salinity of irrigation watere0
- Outcome
- gas exchangese0
- Direction
- reductione0
- Qualifier
- 61 and 96 days after transplantinge0
Not reportedComparator
Verbatim
e0“Increasing salinity of irrigation water led to reduction in gas exchanges at 61 and 96 days after transplanting”
e1“yellow passion fruit”
Claim · model-written summary
Irrigation salinity inhibited CO2 assimilation, transpiration and stomatal conductance.
- Taxon
- passion fruit
Passiflora edulise0 - Treatment
- Water salinitye0
- Outcome
- CO2 assimilation, transpiration, stomatal conductancee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water salinity inhibited the CO2 assimilation, transpiration, stomatal conductance, instantaneous carboxylation efficiency and stem diameter of passion fruit plants”
Claim · model-written summary
Irrigation salinity inhibited instantaneous carboxylation efficiency and stem diameter.
- Taxon
- passion fruitPassiflora edulise0
- Treatment
- Water salinitye0
- Outcome
- instantaneous carboxylation efficiency and stem diametere0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water salinity inhibited the CO2 assimilation, transpiration, stomatal conductance, instantaneous carboxylation efficiency and stem diameter of passion fruit plants”
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