Abstract
ABSTRACT The aim of this study was to evaluate the morphophysiological aspects of eggplant cv. Preta Comprida irrigated with brackish water and subjected to foliar application of chitosan. Treatments consisted of five levels of electrical conductivity of irrigation water - ECw (0.4; 1.4; 2.4; 3.4 and 4.4 dS m-1) and two concentrations of chitosan (0 and 0.50 g L-1), arranged in randomized blocks, in a 5 × 2 factorial scheme with four replicates. Relative water content, electrolyte leakage, chlorophyll a, chlorophyll b and total chlorophyll contents and carotenoid contents, initial fluorescence, maximum fluorescence, variable fluorescence and quantum efficiency of photosystem II were evaluated. Growth was evaluated by relative growth rates in plant height and stem diameter. Chitosan application attenuated the effects of salt stress on relative water content up to the estimated ECw of 1.9 dS m-1. Foliar application of chitosan at a concentration of 0.50 g L-1 promoted beneficial effects on the synthesis of chlorophyll a, total chlorophyll and carotenoids in eggplant grown under water salinity of 0.4 dS m-1. Irrigation water salinity above 0.8 dS m-1 increased electrolyte leakage and inhibited the synthesis of photosynthetic pigments and chlorophyll a fluorescence in eggplant, regardless of foliar application of chitosan. Chitosan promoted a higher growth rate in height of eggplant in the period of 58-85 days after sowing.
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Claims 5
Claim · model-written summary
Chitosan attenuated salinity effects on relative water content up to 1.9 dS m-1 ECw.
- Taxon
- eggplant
Solanum melongenae1 - Material
- Preta Compridae1
- Treatment
- Chitosan applicatione0
- Outcome
- relative water contente0
- Direction
- attenuatede0
- Qualifier
- up to the estimated ECw of 1.9 dS m-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chitosan application attenuated the effects of salt stress on relative water content up to the estimated ECw of 1.9 dS m-1.”
e1“eggplant cv. Preta Comprida”
Claim · model-written summary
Chitosan at 0.50 g L-1 benefited chlorophyll a, total chlorophyll, and carotenoid synthesis under 0.4 dS m-1 irrigation.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- Foliar application of chitosan at a concentration of 0.50 g L-1e0
- Outcome
- synthesis of chlorophyll a, total chlorophyll and carotenoidse0
- Direction
- promotede0
- Qualifier
- water salinity of 0.4 dS m-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of chitosan at a concentration of 0.50 g L-1 promoted beneficial effects on the synthesis of chlorophyll a, total chlorophyll and carotenoids in eggplant grown under water salinity of 0.4 dS m-1.”
Claim · model-written summary
Irrigation salinity above 0.8 dS m-1 increased electrolyte leakage in eggplant regardless of chitosan.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- Irrigation water salinity above 0.8 dS m-1e0
- Outcome
- electrolyte leakagee0
- Direction
- increasede0
- Qualifier
- regardless of foliar application of chitosane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation water salinity above 0.8 dS m-1 increased electrolyte leakage and inhibited the synthesis of photosynthetic pigments and chlorophyll a fluorescence in eggplant, regardless of foliar application of chitosan.”
Claim · model-written summary
Irrigation salinity above 0.8 dS m-1 inhibited photosynthetic pigment synthesis and chlorophyll a fluorescence.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- Irrigation water salinity above 0.8 dS m-1e0
- Outcome
- synthesis of photosynthetic pigments and chlorophyll a fluorescencee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation water salinity above 0.8 dS m-1 increased electrolyte leakage and inhibited the synthesis of photosynthetic pigments and chlorophyll a fluorescence in eggplant, regardless of foliar application of chitosan.”
Claim · model-written summary
Chitosan increased eggplant height growth rate 58 to 85 days after sowing.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- Chitosane0
- Outcome
- growth rate in heighte0
- Direction
- highere0
- Qualifier
- 58-85 days after sowinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chitosan promoted a higher growth rate in height of eggplant in the period of 58-85 days after sowing.”
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