Abstract
Abstract Water constraint is a crucial factor in determining the productivity and production of linseed or flaxseed globally. The root system of flaxseed consists of a single taproot mainly confined to the topsoil; thus, the structure of the root system significantly impacts the uptake of water from the soil. This research conducted root–shoot phenotyping on a diverse range of linseed germplasm under PEG‐induced water deficit stress conditions to unravel the potential of genebank germplasm for drought tolerance. Varied responses to stress and substantial diversity in genotypic response were observed among the linseed accessions for all growth parameters under both normal and stress conditions. The application of PEG led to a decrease (ranging from 7.39% to 62.02%) in all parameters except chlorophyll content, which exhibited an increase of 13.76% in response to stress conditions. Principal component analysis revealed that the first four principal components (PCs) with Eigenvalue >1 explained 74.23% of the total variance, with the first PC alone accounting for 42.15% of the total variance contributed by various traits such as leaf width, shoot length, root–shoot biomass, root length, surface area, and volume. Assessing the comparative performance based on the stress susceptibility index (SSI) for shoot–root length and root surface area, a subset of 12 drought tolerant (SSI ≤ 0.50) and 5 susceptible (SSI > 1.00), genotypes was constituted for validation at the adult plant stage. The accessions IC0096648, IC0523799, IC0249015, IC0096587, IC0385336, IC0498744, IC0499170, EC0041481, IC0526017, IC0623723, IC0113110, and IC0621685 exhibiting tolerance to PEG‐induced water stress during the initial (seedling stage) growth maintained physiological efficiency and yield at the adult plant stage. The elite drought‐tolerant genotypes identified in the present study will provide access to genetically diverse material in breeding to enhance drought tolerance in linseed.
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Claims 9
Claim · model-written summary
Linseed accessions varied substantially in growth response to stress.
Verbatim
e0“Varied responses to stress and substantial diversity in genotypic response were observed among the linseed accessions for all growth parameters under both normal and stress conditions.”
Claim · model-written summary
PEG reduced growth parameters by 7.39% to 62.02%, excluding chlorophyll content.
- Taxon
- linseedt0
- Treatment
- PEGe0
- Outcome
- all parameters except chlorophyll contente0
- Direction
- decreasee0
- Value
- 7.39% to 62.02%e0
Not reportedComparator
Verbatim
e0“The application of PEG led to a decrease (ranging from 7.39% to 62.02%) in all parameters except chlorophyll content”
t0“linseed”
Claim · model-written summary
PEG increased chlorophyll content by 13.76%.
- Taxon
- linseedt0
- Treatment
- stress conditionse0
- Outcome
- chlorophyll contente0
- Direction
- increasee0
- Value
- 13.76%e0
Not reportedComparator
Verbatim
e0“chlorophyll content, which exhibited an increase of 13.76% in response to stress conditions.”
t0“linseed”
Claim · model-written summary
The first four principal components explained 74.23% of trait variance.
Verbatim
e0“the first four principal components (PCs) with Eigenvalue >1 explained 74.23% of the total variance”
t0“linseed”
Claim · model-written summary
The first principal component accounted for 42.15% of trait variance.
Verbatim
e0“the first PC alone accounting for 42.15% of the total variance”
t0“linseed”
Claim · model-written summary
Stress susceptibility screening selected 12 tolerant genotypes.
Verbatim
e0“a subset of 12 drought tolerant (SSI ≤ 0.50) and 5 susceptible (SSI > 1.00), genotypes was constituted for validation at the adult plant stage.”
t0“linseed”
Claim · model-written summary
Stress susceptibility screening selected 5 susceptible genotypes.
Verbatim
e0“a subset of 12 drought tolerant (SSI ≤ 0.50) and 5 susceptible (SSI > 1.00), genotypes was constituted for validation at the adult plant stage.”
t0“linseed”
Claim · model-written summary
Twelve named seedling tolerant accessions maintained physiological efficiency and yield as adults.
Verbatim
e0“The accessions IC0096648, IC0523799, IC0249015, IC0096587, IC0385336, IC0498744, IC0499170, EC0041481, IC0526017, IC0623723, IC0113110, and IC0621685 exhibiting tolerance to PEG‐induced water stress during the initial (seedling stage) growth maintained physiological efficiency and yield at the adult plant stage.”
t0“linseed”
Claim · model-written summary
The identified drought tolerant genotypes were proposed as diverse breeding material.
Verbatim
e0“The elite drought‐tolerant genotypes identified in the present study will provide access to genetically diverse material in breeding to enhance drought tolerance in linseed.”
The same questions in other papers
drought · physiology: pigments · Linum usitatissimum (flax)Results agree
2 papers in the same direction as this paper
- 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.