Abstract
Plant hormones influence various physiological processes during the growth and development of plants, but their critical roles in influencing yield and antioxidant activities in dry-seeded rice (DSR) have not been adequately explored. This study aims to analyze the performance and antioxidant activity of contrasting genotypes of DSR in response to soil moisture regimes and foliar-applied hormones. The study comprised sixteen treatments that were evaluated under field conditions as per split-plot design in three replications. Treatments comprised combinations of two soil moisture tension regimes (10 kPa and 20 kPa) and two genotypes (PR-111, non-stay-green type and PR-123, stay-green type) applied to the main plots and foliar application of three hormones (gibberellic acid (GA3) 40 mg kg−1, abscisic acid (ABA) 20 mg kg−1, and cytokinin (CK) 40 mg kg−1)) and a control (unsprayed) to subplots. The non-stay-green genotype (PR-111) resulted in 34.6% more grain yield (6.48 t ha−1) than the stay-green genotype (PR-123) at the lower soil moisture tension regime (SMTR) (10 kPa) due to the increased number of filled grains per panicle and improvement in harvest index (HI). At the higher SMTR (20 kPa), the stay-green genotype (PR-123) produced 26.4% more grain yield (5.21 t ha−1) than non-stay green genotype (4.12 t ha−1) and showed enhanced superoxide dismutase (SOD) and peroxide dismutase (POD) activity that may have contributed in maintaining sink size through improved chlorophyll content. Grain yield (6.35 t ha−1) with foliar-applied GA3 (40 mg kg−1) at SMTR of 10 kPa was higher by 12.2% and 24.0% than with foliar-applied ABA (20 mg kg−1) and unsprayed treatments, respectively. Irrigation application at SMTR of 20 kPa and foliar application of ABA gave 24.1% higher grain yield (5.15 t ha−1) than the unsprayed treatment, but it was similar to foliar-applied GA3 and CK. This study implied that the stay-green genotype (PR-123) was more suitable under moisture stress conditions (20 kPa) in DSR, as it maintained sink size even under moisture stress conditions by improving dry matter translocation and enhancing SOD and POD activity. The study suggests the need to find out the endogenous level of these plant hormones in rice genotypes under a range of water regimes to develop high yielding and water use efficient genotypes of DSR.
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Claims 9
Claim · model-written summary
PR-111 gave 34.6% more grain yield than PR-123 at 10 kPa.
- Taxon
- rice
Oryza sativat0 - Material
- PR-111e0
- Outcome
- grain yielde0
- Direction
- moree0
- Value
- 34.6%e0
- Qualifier
- 10 kPae0
- Comparator
- PR-123e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“The non-stay-green genotype (PR-111) resulted in 34.6% more grain yield (6.48 t ha−1) than the stay-green genotype (PR-123) at the lower soil moisture tension regime (SMTR) (10 kPa)”
Claim · model-written summary
PR-111 had more filled grains per panicle and improved harvest index at 10 kPa.
- Taxon
- riceOryza sativat0
- Material
- PR-111e1
- Outcome
- number of filled grains per panicle and improvement in harvest indexe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“due to the increased number of filled grains per panicle and improvement in harvest index (HI)”
e1“The non-stay-green genotype (PR-111) resulted in 34.6% more grain yield (6.48 t ha−1) than the stay-green genotype (PR-123) at the lower soil moisture tension regime (SMTR) (10 kPa)”
Claim · model-written summary
PR-123 yielded 26.4% more than PR-111 at 20 kPa.
- Taxon
- riceOryza sativat0
- Material
- PR-123e0
- Outcome
- grain yielde0
- Direction
- moree0
- Value
- 26.4%e0
- Qualifier
- 20 kPae0
- Comparator
- non-stay green genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“At the higher SMTR (20 kPa), the stay-green genotype (PR-123) produced 26.4% more grain yield (5.21 t ha−1) than non-stay green genotype (4.12 t ha−1)”
Claim · model-written summary
PR-123 showed enhanced SOD and POD activity at 20 kPa.
- Taxon
- riceOryza sativat0
- Material
- PR-123e1
- Outcome
- superoxide dismutase (SOD) and peroxide dismutase (POD) activitye0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“showed enhanced superoxide dismutase (SOD) and peroxide dismutase (POD) activity”
e1“At the higher SMTR (20 kPa), the stay-green genotype (PR-123) produced 26.4% more grain yield (5.21 t ha−1) than non-stay green genotype (4.12 t ha−1)”
Claim · model-written summary
GA3 at 10 kPa yielded 12.2% more grain than ABA.
- Taxon
- riceOryza sativat0
- Treatment
- foliar-applied GA3 (40 mg kg−1)e0
- Outcome
- Grain yielde0
- Direction
- highere0
- Value
- 12.2%e0
- Qualifier
- 10 kPae0
- Comparator
- foliar-applied ABA (20 mg kg−1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“Grain yield (6.35 t ha−1) with foliar-applied GA3 (40 mg kg−1) at SMTR of 10 kPa was higher by 12.2% and 24.0% than with foliar-applied ABA (20 mg kg−1) and unsprayed treatments, respectively”
Claim · model-written summary
GA3 at 10 kPa yielded 24.0% more grain than unsprayed treatment.
- Taxon
- riceOryza sativat0
- Treatment
- foliar-applied GA3 (40 mg kg−1)e0
- Outcome
- Grain yielde0
- Direction
- highere0
- Value
- 24.0%e0
- Comparator
- unsprayed treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“Grain yield (6.35 t ha−1) with foliar-applied GA3 (40 mg kg−1) at SMTR of 10 kPa was higher by 12.2% and 24.0% than with foliar-applied ABA (20 mg kg−1) and unsprayed treatments, respectively”
Claim · model-written summary
ABA at 20 kPa yielded 24.1% more grain than unsprayed treatment.
- Taxon
- riceOryza sativat0
- Treatment
- foliar application of ABAe0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 24.1%e0
- Qualifier
- 20 kPae0
- Comparator
- unsprayed treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“Irrigation application at SMTR of 20 kPa and foliar application of ABA gave 24.1% higher grain yield (5.15 t ha−1) than the unsprayed treatment”
Claim · model-written summary
ABA yield at 20 kPa was similar to GA3 and CK.
- Taxon
- riceOryza sativat0
- Outcome
- similare0
- Direction
- similare0
- Comparator
- foliar-applied GA3 and CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“but it was similar to foliar-applied GA3 and CK”
Claim · model-written summary
Authors consider PR-123 more suitable at 20 kPa moisture stress.
- Taxon
- riceOryza sativat0
- Material
- PR-123e0
- Outcome
- more suitable under moisture stress conditions (20 kPa)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Genotypes”
e0“the stay-green genotype (PR-123) was more suitable under moisture stress conditions (20 kPa) in DSR”
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See all 691 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.