Abstract
Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia were used to investigate the potential of osmopriming with polyethylene glycol (PEG 8000) to improve germination performance, seed reserve utilization and early seedling growth and drought stress tolerance. The primed (PS) and unprimed (UPS) seeds of the three sorghum varieties were germinated for 8 days under increasing PEG-induced osmotic stress. The treatments were arranged in a completely randomized design, in a factorial arrangement, with three sorghum cultivars (‘Zaydia’, ‘Shahbi’ and ‘Ahmar’) and four osmotic potentials (0.0; -0.4; -0.8 and -1.2 MPa) with four replicates of 50 seeds each. The results showed that drought stress affected seed germination and seedling emergence and establishment, but increased the activity of the antioxidant enzyme catalase (CAT). The strongest inhibition of germination and growth occurred at the highest PEG concentration and a significant difference was noticeable between the studied varieties. We confirmed also that seed osmopriming improved seed germination performance, seedling growth and enhanced the CAT activities while reduced malonyldialdehyde (MDA) accumulation and electrolyte leakage (EL) in the drought-stressed seedlings. Seed priming have enhanced also the α-amylase and total proteases activities in all varieties. The largest increase of these hydrolysing enzymes was shown in ‘Ahmar’. Furthermore, the PEG priming lead to improvement of the weight of utilized (mobilized) seed reserve (WUSR), seed reserve depletion percentage (SRDP) and total seedling dry weight (SLDW) of sorghum seedlings under water stress conditions. Still, the highest values or all three parameters were found in the ‘Ahmar’ variety. Under increasing drought stress conditions, ‘Ahmar’ showed the highest yield stability index (YSI) and the least EL and MDA contents in comparison to the other two varieties during the seedling establishment stage. Therefore, the former variety can tolerate better a rigorous water stress condition. ‘Zaydia’ appears to be the most vulnerable to drought stress. Thus, the use of species or varieties with eminent seed metabolic quality is an advantageous trait in drought-prone regions.
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Claims 14
Claim · model-written summary
Seed osmopriming improved seed germination performance of sorghum under drought.
- Taxon
- Sorghum bicolor
Sorghum bicolore0 - Treatment
- seed osmopriminge2
- Outcome
- seed germination performancee2
- Direction
- improvede2
- Comparator
- unprimed (UPS) seedse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e1“The primed (PS) and unprimed (UPS) seeds of the three sorghum varieties”
e2“seed osmopriming improved seed germination performance, seedling growth and enhanced the CAT activities while reduced malonyldialdehyde (MDA) accumulation and electrolyte leakage (EL) in the drought-stressed seedlings”
Claim · model-written summary
Seed osmopriming enhanced catalase activity in drought-stressed sorghum seedlings.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- seed osmopriminge2
- Outcome
- CAT activitiese2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e2“seed osmopriming improved seed germination performance, seedling growth and enhanced the CAT activities while reduced malonyldialdehyde (MDA) accumulation and electrolyte leakage (EL) in the drought-stressed seedlings”
Claim · model-written summary
Seed osmopriming reduced malonyldialdehyde accumulation in drought-stressed sorghum seedlings.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- seed osmopriminge2
- Outcome
- malonyldialdehyde (MDA) accumulatione2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e2“seed osmopriming improved seed germination performance, seedling growth and enhanced the CAT activities while reduced malonyldialdehyde (MDA) accumulation and electrolyte leakage (EL) in the drought-stressed seedlings”
Claim · model-written summary
Seed osmopriming reduced electrolyte leakage in drought-stressed sorghum seedlings.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- seed osmopriminge2
- Outcome
- electrolyte leakage (EL)e2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e2“seed osmopriming improved seed germination performance, seedling growth and enhanced the CAT activities while reduced malonyldialdehyde (MDA) accumulation and electrolyte leakage (EL) in the drought-stressed seedlings”
Claim · model-written summary
Seed priming enhanced alpha-amylase and total protease activities in all sorghum varieties.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- Seed priminge3
- Outcome
- α-amylase and total proteases activitiese3
- Direction
- enhancede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e3“Seed priming have enhanced also the α-amylase and total proteases activities in all varieties”
Claim · model-written summary
Ahmar showed the largest increase of hydrolysing enzymes after priming.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Material
- Ahmare4
- Outcome
- hydrolysing enzymese4
- Direction
- largest increasee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e4“The largest increase of these hydrolysing enzymes was shown in ‘Ahmar’”
Claim · model-written summary
PEG priming improved the weight of utilized seed reserve, seed reserve depletion percentage and total seedling dry weight under water stress.
- Treatment
- PEG priminge5
- Outcome
- weight of utilized (mobilized) seed reserve (WUSR), seed reserve depletion percentage (SRDP) and total seedling dry weight (SLDW)e5
- Direction
- improvemente5
- Qualifier
- under water stress conditionse5
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the PEG priming lead to improvement of the weight of utilized (mobilized) seed reserve (WUSR), seed reserve depletion percentage (SRDP) and total seedling dry weight (SLDW) of sorghum seedlings under water stress conditions”
Claim · model-written summary
Ahmar showed the highest yield stability index compared with the other two varieties.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Material
- Ahmare6
- Outcome
- yield stability index (YSI)e6
- Direction
- higheste6
- Comparator
- the other two varietiese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e6“‘Ahmar’ showed the highest yield stability index (YSI) and the least EL and MDA contents in comparison to the other two varieties”
Claim · model-written summary
Ahmar had the least electrolyte leakage and malonyldialdehyde contents compared with the other two varieties.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Material
- Ahmare6
- Outcome
- EL and MDA contentse6
- Direction
- leaste6
- Comparator
- the other two varietiese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e6“‘Ahmar’ showed the highest yield stability index (YSI) and the least EL and MDA contents in comparison to the other two varieties”
Claim · model-written summary
The former variety, Ahmar, can tolerate a rigorous water stress condition better than the others.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Material
- former varietye7
- Treatment
- rigorous water stress conditione7
- Outcome
- toleratee7
- Direction
- bettere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e7“Therefore, the former variety can tolerate better a rigorous water stress condition”
Claim · model-written summary
Zaydia appears to be the most vulnerable sorghum variety to drought stress.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Material
- Zaydiae1
- Treatment
- drought stresse1
- Outcome
- vulnerable to drought stresse1
- Direction
- most vulnerablee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e1“‘Zaydia’ appears to be the most vulnerable to drought stress”
Claim · model-written summary
The highest PEG concentration caused the strongest inhibition of germination and growth of sorghum.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- highest PEG concentratione1
- Outcome
- germination and growthe1
- Direction
- strongest inhibitione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e1“The strongest inhibition of germination and growth occurred at the highest PEG concentration”
Claim · model-written summary
Drought stress increased the activity of the antioxidant enzyme catalase in sorghum seedlings.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- drought stresse1
- Outcome
- activity of the antioxidant enzyme catalase (CAT)e1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e1“drought stress affected seed germination and seedling emergence and establishment, but increased the activity of the antioxidant enzyme catalase (CAT)”
Claim · model-written summary
Drought stress reduced seed germination and seedling emergence and establishment of sorghum.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- drought stresse1
- Outcome
- seed germination and seedling emergence and establishmente1
- Direction
- decreaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of three sorghum (Sorghum bicolor (L.) Moench.) varieties from Southwest Saudi Arabia”
e1“drought stress affected seed germination and seedling emergence and establishment, but increased the activity of the antioxidant enzyme catalase (CAT)”
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See all 14 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.