Abstract
• Drought stress causes a severe oxidative stress in rice plants. • Drought negative effects exacerbate the decline in yield indices and grain nutritional quality. • Cobalt priming of seeds can greatly aid in reducing ROS-induced damage which orchestrated with better growth, yield and nutritional quality of rice under drought stress. Water scarcity is one of the most important abiotic factors limiting rice growth and productivity. The application of nutrients affects various physiological and biochemical mechanisms to curtail water deficiency, but little is known about the ameliorative effects of cobalt (Co) on rice. Our study aimed to investigate the advantageous effects of soaking in Co at the optimum concentration (10 and 44.5 µM) on morpho-physiological traits and oxidative stress , during the vegetative and reproductive stages, also assessing yield attributes, in two rice varieties (Sakha 104, drought-sensitive, and Giza 178, drought-tolerant). Treatments included control (100% field capacity (FC)), moderate drought stress (75 % FC), and severe drought stress (50 % FC) either alone or in combination with Co. A water deficit and oxidative stress affected Giza 178 less than Sakha 104. Co application significantly enhanced the performance of two rice varieties under drought stress by increasing plant height, biomass, water content, tillering, leaf area, pigments (chlorophyll a, carotenoids, total chlorophyll), sugars (soluble sugars, and total carbohydrates), and Co content (shoot and root). Also, Co significantly increased the performance of the antioxidant system by elevating the concentration of total phenols, flavonoids, proline, and antioxidant enzymes (catalase, peroxidase, and polyphenol oxidase), while significantly decreasing chlorophyll b, malondialdehyde, and 2,2-diphenyl-1-picryl-hydrazyl. Yield attributes such as the number of tillers, panicle parameters (number, length, and weight), 100-grain weight, harvest index, and grain nutritive value (sugars, vitamin B, and Co contents) were significantly enhanced by Co in both varieties. However, the maximum performance was observed in Giza 178.
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Claims 12
Claim · model-written summary
Water deficit and oxidative stress affected Giza 178 less than Sakha 104.
- Taxon
- rice
Oryza sativat0 - Material
- Giza 178e0
- Outcome
- water deficit and oxidative stresse0
- Direction
- lesse0
- Comparator
- Sakha 104e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A water deficit and oxidative stress affected Giza 178 less than Sakha 104”
t0“rice”
Claim · model-written summary
Cobalt increased rice growth traits under drought.
- Taxon
- riceOryza sativat0
- Treatment
- Co applicatione0
- Outcome
- plant height, biomass, water contente0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co application significantly enhanced the performance of two rice varieties under drought stress by increasing plant height, biomass, water content, tillering, leaf area”
t0“rice”
Claim · model-written summary
Cobalt increased photosynthetic pigments under drought.
- Taxon
- riceOryza sativat0
- Treatment
- Co applicatione0
- Outcome
- pigments (chlorophyll a, carotenoids, total chlorophyll)e0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co application significantly enhanced the performance of two rice varieties under drought stress by increasing plant height, biomass, water content, tillering, leaf area, pigments (chlorophyll a, carotenoids, total chlorophyll)”
t0“rice”
Claim · model-written summary
Cobalt increased sugars and carbohydrates under drought.
- Taxon
- riceOryza sativat0
- Treatment
- Co applicatione0
- Outcome
- sugars (soluble sugars, and total carbohydrates)e0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co application significantly enhanced the performance of two rice varieties under drought stress by increasing plant height, biomass, water content, tillering, leaf area, pigments (chlorophyll a, carotenoids, total chlorophyll), sugars (soluble sugars, and total carbohydrates)”
t0“rice”
Claim · model-written summary
Cobalt raised shoot and root Co content under drought.
- Taxon
- riceOryza sativat0
- Treatment
- Co applicatione1
- Outcome
- Co content (shoot and root)e0
- Direction
- increasinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co content (shoot and root)”
e1“Co application significantly enhanced the performance of two rice varieties under drought stress by increasing”
t0“rice”
Claim · model-written summary
Cobalt increased phenols, flavonoids, and proline.
- Taxon
- riceOryza sativat0
- Treatment
- Coe0
- Outcome
- total phenols, flavonoids, prolinee0
- Direction
- elevatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co significantly increased the performance of the antioxidant system by elevating the concentration of total phenols, flavonoids, proline”
t0“rice”
Claim · model-written summary
Cobalt increased antioxidant enzymes.
- Taxon
- riceOryza sativat0
- Treatment
- Coe0
- Outcome
- antioxidant enzymes (catalase, peroxidase, and polyphenol oxidase)e0
- Direction
- elevatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co significantly increased the performance of the antioxidant system by elevating the concentration of total phenols, flavonoids, proline, and antioxidant enzymes (catalase, peroxidase, and polyphenol oxidase)”
t0“rice”
Claim · model-written summary
Cobalt decreased chlorophyll b, malondialdehyde, and DPPH.
- Taxon
- riceOryza sativat0
- Treatment
- Coe0
- Outcome
- chlorophyll b, malondialdehyde, and 2,2-diphenyl-1-picryl-hydrazyle0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co significantly increased the performance of the antioxidant system by elevating the concentration of total phenols, flavonoids, proline, and antioxidant enzymes (catalase, peroxidase, and polyphenol oxidase), while significantly decreasing chlorophyll b, malondialdehyde, and 2,2-diphenyl-1-picryl-hydrazyl”
t0“rice”
Claim · model-written summary
Cobalt enhanced yield attributes in both varieties.
- Taxon
- riceOryza sativat0
- Treatment
- Coe0
- Outcome
- number of tillers, panicle parameters (number, length, and weight)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield attributes such as the number of tillers, panicle parameters (number, length, and weight), 100-grain weight, harvest index, and grain nutritive value (sugars, vitamin B, and Co contents) were significantly enhanced by Co in both varieties”
t0“rice”
Claim · model-written summary
Cobalt enhanced grain weight and harvest index.
- Taxon
- riceOryza sativat0
- Treatment
- Coe0
- Outcome
- 100-grain weight, harvest indexe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100-grain weight, harvest index, and grain nutritive value (sugars, vitamin B, and Co contents) were significantly enhanced by Co in both varieties”
t0“rice”
Claim · model-written summary
Cobalt enhanced grain nutritive value.
- Taxon
- riceOryza sativat0
- Treatment
- Coe0
- Outcome
- grain nutritive value (sugars, vitamin B, and Co contents)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain nutritive value (sugars, vitamin B, and Co contents) were significantly enhanced by Co in both varieties”
t0“rice”
Claim · model-written summary
Giza 178 showed the maximum overall performance.
- Taxon
- riceOryza sativat0
- Material
- Giza 178e0
- Outcome
- maximum performancee0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum performance was observed in Giza 178”
t0“rice”
The same questions in other papers
cobalt atom · growth · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
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cobalt atom · yield · Oryza sativa (rice)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
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7 papers more in this group
See all 11 papers →cobalt atom · physiology: pigments · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
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.