Abstract
Onion (Allium cepa L.) is a universally significant vegetable crop, but its yield is severely limited by soil salinity, particularly in large onion-producing areas of India. This research evaluates the morphological, physiological and yield reaction of four improved onion genotypes (Bhima Kiran, Bhima Shakti, Bhima Shweta and Bhima Red) to six levels of salinity (0, 0.5, 1, 2, 4 and 6 dS m-1) in pot experiments over 2023-24 and 2024-25 Winter- spring seasons at the ICAR-Directorate of Onion and Garlic Research, Pune. Results indicated that salinity increases resulted in substantial declines in plant height, number of leaves, thickness of the neck, leaf area, dry matter accumulation, chlorophyll content, bulb diameter, bulb weight and total bulb yield with significant genotypic variation. Bhima Shakti and Bhima Shweta exhibit higher salinity tolerance, maintaining higher growth and yield parameters under salinity conditions, whereas Bhima Kiran and Bhima Red were extremely sensitive, recording drastic reductions. Low salinity (0.5 dS m-1) sometimes triggered growth and yield in tolerant genotypes, which indicated potential osmotic priming effects. Extreme salinity (6 dS m-1) reduced total bulb yield in sensitive genotypes (Bhima Kiran and Bhima Red) to only 3 %-12 % of controls, while tolerant genotypes (Bhima Shakti and Bhima Shweta) maintained higher yields of 33.94 g and 53.59 g pot-1, about 7 % and 10 % of their controls respectively. The research emphasizes the need for genotype selection for salt-susceptible environments and focuses on the physiological and biochemical processes involved in salt tolerance of onion.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Increasing salinity substantially reduced plant height, number of leaves and neck thickness in onion genotypes.
- Taxon
- Allium cepa
Allium cepae0 - Material
- Bhima Kiran, Bhima Shakti, Bhima Shweta and Bhima Rede1
- Treatment
- salinitye2
- Outcome
- plant height, number of leaves, thickness of the necke3
- Direction
- declinese3
- Qualifier
- with significant genotypic variatione3
- Setting
- pot experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e1“four improved onion genotypes (Bhima Kiran, Bhima Shakti, Bhima Shweta and Bhima Red)”
e2“to six levels of salinity (0, 0.5, 1, 2, 4 and 6 dS m-1) in pot experiments”
e3“substantial declines in plant height, number of leaves, thickness of the neck, leaf area, dry matter accumulation, chlorophyll content, bulb diameter, bulb weight and total bulb yield with significant genotypic variation”
Claim · model-written summary
Increasing salinity substantially reduced leaf area, dry matter accumulation and chlorophyll content in onion genotypes.
- Taxon
- Allium cepaAllium cepae0
- Material
- Bhima Kiran, Bhima Shakti, Bhima Shweta and Bhima Rede1
- Treatment
- salinitye2
- Outcome
- leaf area, dry matter accumulation, chlorophyll contente3
- Direction
- declinese3
- Qualifier
- with significant genotypic variatione3
- Setting
- pot experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e1“four improved onion genotypes (Bhima Kiran, Bhima Shakti, Bhima Shweta and Bhima Red)”
e2“to six levels of salinity (0, 0.5, 1, 2, 4 and 6 dS m-1) in pot experiments”
e3“substantial declines in plant height, number of leaves, thickness of the neck, leaf area, dry matter accumulation, chlorophyll content, bulb diameter, bulb weight and total bulb yield with significant genotypic variation”
Claim · model-written summary
Increasing salinity substantially reduced bulb diameter, bulb weight and total bulb yield in onion genotypes.
- Taxon
- Allium cepaAllium cepae0
- Material
- Bhima Kiran, Bhima Shakti, Bhima Shweta and Bhima Rede1
- Treatment
- salinitye2
- Outcome
- bulb diameter, bulb weight and total bulb yielde3
- Direction
- declinese3
- Qualifier
- with significant genotypic variatione3
- Setting
- pot experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e1“four improved onion genotypes (Bhima Kiran, Bhima Shakti, Bhima Shweta and Bhima Red)”
e2“to six levels of salinity (0, 0.5, 1, 2, 4 and 6 dS m-1) in pot experiments”
e3“substantial declines in plant height, number of leaves, thickness of the neck, leaf area, dry matter accumulation, chlorophyll content, bulb diameter, bulb weight and total bulb yield with significant genotypic variation”
Claim · model-written summary
Bhima Shakti and Bhima Shweta maintained higher growth and yield parameters under salinity than Bhima Kiran and Bhima Red.
- Taxon
- Allium cepaAllium cepae0
- Material
- Bhima Shakti and Bhima Shwetae4
- Treatment
- salinity conditionse4
- Outcome
- growth and yield parameterse4
- Direction
- highere4
- Comparator
- Bhima Kiran and Bhima Rede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e4“Bhima Shakti and Bhima Shweta exhibit higher salinity tolerance, maintaining higher growth and yield parameters under salinity conditions”
e5“whereas Bhima Kiran and Bhima Red were extremely sensitive, recording drastic reductions”
Claim · model-written summary
Bhima Kiran and Bhima Red were extremely sensitive to salinity, with drastic reductions in growth and yield parameters.
- Taxon
- Allium cepaAllium cepae0
- Material
- Bhima Kiran and Bhima Rede5
- Treatment
- salinity conditionse4
- Outcome
- growth and yield parameterse4
- Direction
- drastic reductionse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e4“Bhima Shakti and Bhima Shweta exhibit higher salinity tolerance, maintaining higher growth and yield parameters under salinity conditions”
e5“whereas Bhima Kiran and Bhima Red were extremely sensitive, recording drastic reductions”
Claim · model-written summary
Low salinity (0.5 dS m-1) sometimes increased growth and yield in tolerant onion genotypes.
- Taxon
- Allium cepaAllium cepae0
- Material
- tolerant genotypese6
- Treatment
- Low salinity (0.5 dS m-1)e6
- Outcome
- growth and yielde6
- Direction
- increaseinferrede6
- Qualifier
- potential osmotic priming effectse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e6“Low salinity (0.5 dS m-1) sometimes triggered growth and yield in tolerant genotypes”
e7“potential osmotic priming effects”
Claim · model-written summary
Extreme salinity (6 dS m-1) reduced total bulb yield of sensitive onion genotypes to 3 to 12% of their controls.
- Taxon
- Allium cepaAllium cepae0
- Material
- Bhima Kiran and Bhima Rede1
- Treatment
- Extreme salinity (6 dS m-1)e1
- Outcome
- total bulb yielde1
- Direction
- reducede1
- Value
- 3 %-12 %e1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e1“Extreme salinity (6 dS m-1) reduced total bulb yield in sensitive genotypes (Bhima Kiran and Bhima Red) to only 3 %-12 % of controls”
Claim · model-written summary
Bhima Shakti maintained a higher bulb yield of 33.94 g per pot under extreme salinity, about 7% of its control.
- Taxon
- Allium cepaAllium cepae0
- Material
- Bhima Shaktie2
- Treatment
- Extreme salinity (6 dS m-1)e1
- Outcome
- yieldse2
- Direction
- highere2
- Value
- 33.94 ge2
- Qualifier
- about 7 %e2
- Comparator
- their controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e1“Extreme salinity (6 dS m-1) reduced total bulb yield in sensitive genotypes (Bhima Kiran and Bhima Red) to only 3 %-12 % of controls”
e2“tolerant genotypes (Bhima Shakti and Bhima Shweta) maintained higher yields of 33.94 g and 53.59 g pot-1, about 7 % and 10 % of their controls respectively”
Claim · model-written summary
Bhima Shweta maintained a higher bulb yield of 53.59 g per pot under extreme salinity, about 10% of its control.
- Taxon
- Allium cepaAllium cepae0
- Material
- Bhima Shwetae2
- Treatment
- Extreme salinity (6 dS m-1)e1
- Outcome
- yieldse2
- Direction
- highere2
- Value
- 53.59 ge2
- Qualifier
- 10 % of their controlse2
- Comparator
- their controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e1“Extreme salinity (6 dS m-1) reduced total bulb yield in sensitive genotypes (Bhima Kiran and Bhima Red) to only 3 %-12 % of controls”
e2“tolerant genotypes (Bhima Shakti and Bhima Shweta) maintained higher yields of 33.94 g and 53.59 g pot-1, about 7 % and 10 % of their controls respectively”
Claim · model-written summary
Genotype selection is needed for salt-susceptible environments in onion.
- Taxon
- Allium cepaAllium cepae0
- Outcome
- genotype selection for salt-susceptible environmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion (Allium cepa L.) is a universally significant vegetable crop”
e1“the need for genotype selection for salt-susceptible environments”
The same questions in other papers
salinity · yield · Allium cepa (onion)Results differ
1 paper in the same direction as this paper · 18 in the opposite direction
- negative
- negative
- negative
16 papers more in this group
See all 20 papers →salinity · growth · Allium cepa (onion)Results differ
39 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
42 papers more in this group
See all 46 papers →salinity · physiology: pigments · Allium cepa (onion)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →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.