Abstract
Salt stress is a threat to irrigated agriculture, especially in semi-arid regions, as it can cause irreversible damage to the photosynthetic apparatus at any stage of plant development, reducing chlorophyll biosynthesis, which compromises the photochemical efficiency and the photosynthetic process of plants. In this respect, phosphorus fertilization stands out as an alternative to mitigate the effects of salt stress on plants. Therefore, the present study investigated the growth, gas exchange, photosynthetic pigments, and photochemical efficiency of sesame cv. BRS Seda irrigated with saline water and fertilized with phosphorus. The experiment was carried out in pots adapted as lysimeters in a greenhouse in Pombal - PB, Brazil. Treatments were distributed in randomized blocks and analyzed in a 5 × 4 factorial arrangement with five levels of electrical conductivity of water (ECw: 0.3, 1.1, 1.9, 2.7, and 3.5 dS m-1) and four phosphorus rates (40, 70, 100, and 130% of the recommended dose for pot trials), in three replicates. The 100% recommendation consisted of applying 300 mg P2O5 kg-1 of soil. Sesame growth, chloroplast pigments, and gas exchange decreased with water salinity above 0.3 dS m-1. The application of 100 and 130% of the recommended phosphorus rate minimized the effects of salt stress on CO2 assimilation rate and photosynthetic pigment synthesis. The increase from 40 to 130% of the recommended phosphorus rate did not change the photochemical efficiency of sesame cv. BRS Seda at 60 days after sowing.
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Claims 3
Claim · model-written summary
Sesame growth, chloroplast pigments and gas exchange decreased with water salinity above 0.3 dS m-1.
- Taxon
- Sesame
Sesamum indicume1 - Treatment
- water salinity above 0.3 dS m-1e1
- Outcome
- growth, chloroplast pigments, and gas exchangee1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Sesame growth, chloroplast pigments, and gas exchange decreased with water salinity above 0.3 dS m-1”
Claim · model-written summary
The application of 100 and 130% of the recommended phosphorus rate minimized the effects of salt stress on sesame CO2 assimilation rate and photosynthetic pigment synthesis.
- Taxon
- sesameSesamum indicumt0
- Treatment
- application of 100 and 130% of the recommended phosphorus ratee2
- Outcome
- CO2 assimilation rate and photosynthetic pigment synthesise2
- Direction
- minimizede2
- Qualifier
- effects of salt stresse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas exchange, photosynthetic pigments, and photochemical efficiency of sesame under salt stress and phosphate fertilization”
e2“The application of 100 and 130% of the recommended phosphorus rate minimized the effects of salt stress on CO2 assimilation rate and photosynthetic pigment synthesis”
Claim · model-written summary
Increasing phosphorus from 40 to 130% of the recommended rate did not change the photochemical efficiency of sesame cv. BRS Seda at 60 days after sowing.
- Taxon
- sesameSesamum indicumt0
- Material
- BRS Sedae3
- Treatment
- The increase from 40 to 130% of the recommended phosphorus ratee3
- Outcome
- photochemical efficiencye3
- Direction
- did not changee3
- Qualifier
- at 60 days after sowinge3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas exchange, photosynthetic pigments, and photochemical efficiency of sesame under salt stress and phosphate fertilization”
e3“The increase from 40 to 130% of the recommended phosphorus rate did not change the photochemical efficiency of sesame cv. BRS Seda at 60 days after sowing”
The same questions in other papers
salinity · physiology: gas exchange · Sesamum indicum (sesame)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.