Abstract
SALINITY stress significantly impacts the growth, development and yield of sorghum. Knowledge about the productivity of sorghum under salinity stress condition is lagging, due to the marginally limited information about the physio-biochemical and molecular mechanisms underpinning salinity stress tolerance. The study aimed to investigate the physio-biochemical and molecular mechanisms associated with the differential responses under salinity stress condition in sorghum. To achieve our objectives, the physiological and biochemical salinity stress parameters, including membrane stability index, enzyme antioxidant activities, proline and chlorophyll contents, measured at the seedling stage, were elucidated to identify the salinity stress response status of the genotypes. The quantitative real-time polymerase chain reaction (qPCR) was perform to elucidate the expression pattern of different categories of genes under salinity stress in sorghum genotypes. From our results, enhanced enzyme antioxidant activities, membrane status, increased proline content and lower K+/Na+ concentration under 300mM NaCl stress identified PI 585451 to be the most salinity stress-tolerant genotype. Nevertheless, increased MDA and Na+/K+ level, lower proline, chlorophyll content and antioxidant enzyme activities in PI 585454 marked it to be sensitive to salinity stress. Besides, the transcript expression analysis of different genes, showed an upregulation in PI 585451 than in PI 585454. The results highlighted the differences in metabolic response to salinity stress that may play an important role in the provision of information, required for breeding and development of sorghum genotypes that are tolerant to salinity stress.
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Claims 8
Claim · model-written summary
Under 300mM NaCl, PI 585451 showed enhanced antioxidant enzyme activities and membrane status at the seedling stage.
- Material
- PI 585451e1
- Organ / stage
- seedling stagee0
- Treatment
- 300mM NaCl stresse1
- Outcome
- enzyme antioxidant activities, membrane statuse1
- Direction
- enhancede1
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e0“measured at the seedling stage”
e1“enhanced enzyme antioxidant activities, membrane status, increased proline content and lower K+/Na+ concentration under 300mM NaCl stress identified PI 585451 to be the most salinity stress-tolerant genotype”
Claim · model-written summary
Under 300mM NaCl, PI 585451 showed increased proline content at the seedling stage.
- Material
- PI 585451e1
- Organ / stage
- seedling stagee0
- Treatment
- 300mM NaCl stresse1
- Outcome
- proline contente1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e0“measured at the seedling stage”
e1“enhanced enzyme antioxidant activities, membrane status, increased proline content and lower K+/Na+ concentration under 300mM NaCl stress identified PI 585451 to be the most salinity stress-tolerant genotype”
Claim · model-written summary
Under 300mM NaCl, PI 585451 showed lower K+/Na+ concentration at the seedling stage.
- Material
- PI 585451e1
- Organ / stage
- seedling stagee0
- Treatment
- 300mM NaCl stresse1
- Outcome
- K+/Na+ concentratione1
- Direction
- lowere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e0“measured at the seedling stage”
e1“enhanced enzyme antioxidant activities, membrane status, increased proline content and lower K+/Na+ concentration under 300mM NaCl stress identified PI 585451 to be the most salinity stress-tolerant genotype”
Claim · model-written summary
PI 585451 was identified as the most salinity stress-tolerant sorghum genotype.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e1“enhanced enzyme antioxidant activities, membrane status, increased proline content and lower K+/Na+ concentration under 300mM NaCl stress identified PI 585451 to be the most salinity stress-tolerant genotype”
Claim · model-written summary
PI 585454 showed increased MDA and Na+/K+ level under salinity stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e2“Nevertheless, increased MDA and Na+/K+ level, lower proline, chlorophyll content and antioxidant enzyme activities in PI 585454 marked it to be sensitive to salinity stress”
Claim · model-written summary
PI 585454 showed lower proline, chlorophyll content and antioxidant enzyme activities.
- Material
- PI 585454e2
- Outcome
- proline, chlorophyll content and antioxidant enzyme activitiese2
- Direction
- lowere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e2“Nevertheless, increased MDA and Na+/K+ level, lower proline, chlorophyll content and antioxidant enzyme activities in PI 585454 marked it to be sensitive to salinity stress”
Claim · model-written summary
Transcript expression of the analysed genes was higher in PI 585451 than in PI 585454.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e3“the transcript expression analysis of different genes, showed an upregulation in PI 585451 than in PI 585454”
Claim · model-written summary
The metabolic response differences may inform breeding and development of salinity-tolerant sorghum genotypes.
- Outcome
- breeding and development of sorghum genotypese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Two Contrasting Sorghum Genotypes”
e4“may play an important role in the provision of information, required for breeding and development of sorghum genotypes that are tolerant to salinity stress”
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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.