Abstract
In rice, high concentration of lead (Pb) can cause phyto-toxicity affecting several physiological functions. Cultivation of rice varieties that are resistant to Pb-induced oxidative stress is an important management strategy in Pb-contaminated soils. In the current study, we evaluated four different rice cultivars for their response to Pb-induced stress. Three japonica type cultivars X-Jigna, Ediget, and Furat, and one Indica type cultivar Amber 33 were grown in soil containing different Pb concentrations (0 mM, 0.6 mM, and 1.2 mM). The soil was treated with 0 mM or 0.6 mM or 1.2 mM Pb solution one month prior to rice seedling transplantation. Thereafter, four-week-old rice seedlings were transplanted into the treated soil and their responses were observed until maturity. The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars. However, least reduction in the agronomic traits was observed in X-Jigna, whereas the highest reduction in the agronomic traits was observed in Ediget. Antioxidant activity of catalase (CAT), peroxidase (POD), polyphenol oxidase (PPO), and superoxide dismutase (SOD), was evaluated along with the accumulation of superoxide ions (O2.-), protein, proline, chlorophyll, sucrose, glucose, and fructose contents in all the rice cultivars. A significant increase in antioxidant activity and in the accumulation of proline and sucrose contents with the least reduction in the chlorophyll and protein contents was observed in X-Jigna suggesting that X-Jigna is the most tolerant among all the rice cultivars tested against Pb-stress. On the other hand, non-significant and slightly significant increase in the antioxidant activity, less accumulation of proline and sucrose contents, and higher reduction in the chlorophyll and protein contents was observed in Ediget, which further suggest that Ediget is the most susceptible rice cultivar to Pb-stress. In addition, the other rice cultivars Furat and Amber 33, were found to be moderately tolerant to Pb-induced oxidative stress. In summary, our results suggest that tolerance to Pb-induced oxidative stress would be a result of a synergetic action of both enzymatic and non-enzymatic antioxidant systems, leading to a balanced redox status in rice.
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Claims 14
Claim · model-written summary
Pb at 1.2 mM significantly reduced plant height, tillers per plant and panicles per plant in all rice cultivars.
- Taxon
- rice
Oryza sativae1 - Treatment
- highest concentration of Pb (1.2 mM)e1
- Outcome
- plant height, number of tillers per plant, number of panicles per plante1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
Claim · model-written summary
Pb at 1.2 mM significantly reduced spikelets per panicle in all rice cultivars.
- Taxon
- riceOryza sativae1
- Treatment
- highest concentration of Pb (1.2 mM)e1
- Outcome
- number of spikelets per paniclee1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
Claim · model-written summary
X-Jigna showed the least reduction in agronomic traits under Pb stress among the cultivars.
- Taxon
- riceOryza sativae1
- Material
- X-Jignae2
- Outcome
- agronomic traitse2
- Direction
- least reductione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e2“least reduction in the agronomic traits was observed in X-Jigna”
Claim · model-written summary
Ediget showed the highest reduction in agronomic traits under Pb stress among the cultivars.
- Taxon
- riceOryza sativae1
- Material
- Edigete2
- Outcome
- agronomic traitse2
- Direction
- highest reductione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e2“the highest reduction in the agronomic traits was observed in Ediget”
Claim · model-written summary
X-Jigna showed a significant increase in antioxidant activity under Pb stress.
- Taxon
- riceOryza sativae1
- Material
- X-Jignae2
- Outcome
- antioxidant activitye2
- Direction
- increasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e2“A significant increase in antioxidant activity and in the accumulation of proline and sucrose contents with the least reduction in the chlorophyll and protein contents was observed in X-Jigna”
Claim · model-written summary
X-Jigna showed a significant increase in the accumulation of proline and sucrose contents under Pb stress.
- Taxon
- riceOryza sativae1
- Material
- X-Jignae2
- Outcome
- accumulation of proline and sucrose contentse2
- Direction
- increasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e2“A significant increase in antioxidant activity and in the accumulation of proline and sucrose contents with the least reduction in the chlorophyll and protein contents was observed in X-Jigna”
Claim · model-written summary
X-Jigna showed the least reduction in chlorophyll and protein contents under Pb stress.
- Taxon
- riceOryza sativae1
- Material
- X-Jignae2
- Outcome
- chlorophyll and protein contentse2
- Direction
- least reductione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e2“A significant increase in antioxidant activity and in the accumulation of proline and sucrose contents with the least reduction in the chlorophyll and protein contents was observed in X-Jigna”
Claim · model-written summary
The authors conclude that X-Jigna is the most tolerant of the four rice cultivars to Pb stress.
- Taxon
- riceOryza sativae1
- Material
- X-Jignae3
- Outcome
- tolerante3
- Direction
- most tolerante3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e3“X-Jigna is the most tolerant among all the rice cultivars tested against Pb-stress”
Claim · model-written summary
Ediget showed a non-significant or slightly significant increase in antioxidant activity under Pb stress.
- Taxon
- riceOryza sativae1
- Material
- Edigete4
- Outcome
- antioxidant activitye4
- Direction
- increasee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e4“non-significant and slightly significant increase in the antioxidant activity, less accumulation of proline and sucrose contents, and higher reduction in the chlorophyll and protein contents was observed in Ediget”
Claim · model-written summary
Ediget showed less accumulation of proline and sucrose contents under Pb stress.
- Taxon
- riceOryza sativae1
- Material
- Edigete4
- Outcome
- accumulation of proline and sucrose contentse4
- Direction
- less accumulatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e4“non-significant and slightly significant increase in the antioxidant activity, less accumulation of proline and sucrose contents, and higher reduction in the chlorophyll and protein contents was observed in Ediget”
Claim · model-written summary
Ediget showed higher reduction in chlorophyll and protein contents under Pb stress.
- Taxon
- riceOryza sativae1
- Material
- Edigete4
- Outcome
- chlorophyll and protein contentse4
- Direction
- higher reductione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e4“non-significant and slightly significant increase in the antioxidant activity, less accumulation of proline and sucrose contents, and higher reduction in the chlorophyll and protein contents was observed in Ediget”
Claim · model-written summary
The authors conclude that Ediget is the most susceptible of the four rice cultivars to Pb stress.
- Taxon
- riceOryza sativae1
- Material
- Edigete5
- Outcome
- susceptiblee5
- Direction
- most susceptiblee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e5“Ediget is the most susceptible rice cultivar to Pb-stress”
Claim · model-written summary
Furat and Amber 33 were moderately tolerant to Pb-induced oxidative stress.
- Taxon
- riceOryza sativae1
- Material
- Furat and Amber 33e6
- Outcome
- tolerant to Pb-induced oxidative stresse6
- Direction
- moderately tolerante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e6“the other rice cultivars Furat and Amber 33, were found to be moderately tolerant to Pb-induced oxidative stress”
Claim · model-written summary
The authors suggest that Pb-stress tolerance results from a synergy of enzymatic and non-enzymatic antioxidant systems.
- Taxon
- riceOryza sativae1
- Outcome
- tolerance to Pb-induced oxidative stresse7
- Qualifier
- a synergetic action of both enzymatic and non-enzymatic antioxidant systemse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The data revealed that a highest concentration of Pb (1.2 mM) induced significant reduction in agronomic traits such as plant height, number of tillers per plant, number of panicles per plant, and number of spikelets per panicle in all the rice cultivars”
e7“tolerance to Pb-induced oxidative stress would be a result of a synergetic action of both enzymatic and non-enzymatic antioxidant systems”
The same questions in other papers
lead atom · yield · Oryza sativa (rice)Results agree
8 papers in the same direction as this paper
- negative
- negative
- negative
5 papers more in this group
See all 9 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.