Abstract
Drought stress affects plant growth and development and ultimately, reduced grain yield of rice. But stress at different growth stages may respond differently which is still unclear. Therefore, a pot experiment was carried out with six rice genotypes to determine the critical growth stage where drought stress effect on yield reduction and to find stress tolerance mechanism in rice genotypes. Drought stress (control i.e. no stress and 40% field capacity, FC) was imposed on Binadhan-13, Kalizira, BRRI dhan34, Ukunimodhu, RM-100-16 and NERICA mutant rice genotypes at maximum tillering, panicle initiation and grain filling stages and discontinued when the specific stage was over. The experiment was laid out in a complete randomized design with three replications. Drought stress affected number of effective tiller hill-1, number of spikelets panicle-1, filled grains hill-1, 1000-grain weight and grain yield. Binadhan-13 produced the highest grain yield and the lowest sterility under drought stress at grain filling stage. Percentage of spikelet sterility increased under drought stress (40% FC) especially at the panicle initiation stage resulting low grain yield. Among the tested genotypes Binadhan-13 performed well by reducing spikelet sterility under drought stress condition. For 1000-grain weight and grain yield, grain filling stage was found more crucial. From the current research, drought tolerance mechanism was found in genotypes Binadhan-13 and NERICA mutant. [Fundam Appl Agric 2017; 2(3.000): 285-289]
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Claims 8
Claim · model-written summary
Drought stress affected effective tiller number per hill, spikelets per panicle and filled grains per hill in rice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- Drought stresse1
- Outcome
- number of effective tiller hill-1, number of spikelets panicle-1, filled grains hill-1e1
- Comparator
- control i.e. no stresse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“Drought stress affected number of effective tiller hill-1, number of spikelets panicle-1, filled grains hill-1, 1000-grain weight and grain yield”
e2“control i.e. no stress”
Claim · model-written summary
Drought stress affected 1000-grain weight and grain yield of rice.
- Taxon
- RiceOryza sativat0
- Treatment
- Drought stresse1
- Outcome
- 1000-grain weight and grain yielde1
- Comparator
- control i.e. no stresse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“Drought stress affected number of effective tiller hill-1, number of spikelets panicle-1, filled grains hill-1, 1000-grain weight and grain yield”
e2“control i.e. no stress”
Claim · model-written summary
Binadhan-13 produced the highest grain yield under drought stress at the grain filling stage.
- Taxon
- RiceOryza sativat0
- Material
- Binadhan-13e1
- Treatment
- drought stress at grain filling stagee1
- Outcome
- grain yielde1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“Binadhan-13 produced the highest grain yield and the lowest sterility under drought stress at grain filling stage”
Claim · model-written summary
Binadhan-13 had the lowest spikelet sterility under drought stress at the grain filling stage.
- Taxon
- RiceOryza sativat0
- Material
- Binadhan-13e1
- Treatment
- drought stress at grain filling stagee1
- Outcome
- sterilitye1
- Direction
- loweste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“Binadhan-13 produced the highest grain yield and the lowest sterility under drought stress at grain filling stage”
Claim · model-written summary
Spikelet sterility percentage increased under drought stress (40% FC) compared with the unstressed control, especially at panicle initiation, resulting in low grain yield.
- Taxon
- RiceOryza sativat0
- Treatment
- drought stress (40% FC)e1
- Outcome
- Percentage of spikelet sterilitye1
- Direction
- increasede1
- Qualifier
- especially at the panicle initiation stage resulting low grain yielde1
- Comparator
- control i.e. no stresse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“Percentage of spikelet sterility increased under drought stress (40% FC) especially at the panicle initiation stage resulting low grain yield”
e2“control i.e. no stress”
Claim · model-written summary
For 1000-grain weight and grain yield, the grain filling stage was found more crucial for drought stress.
- Taxon
- RiceOryza sativat0
- Treatment
- grain filling stagee1
- Outcome
- 1000-grain weight and grain yielde1
- Direction
- more cruciale1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“For 1000-grain weight and grain yield, grain filling stage was found more crucial”
Claim · model-written summary
A drought tolerance mechanism was found in rice genotype Binadhan-13.
- Taxon
- RiceOryza sativat0
- Material
- Binadhan-13e1
- Outcome
- drought tolerance mechanisme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“drought tolerance mechanism was found in genotypes Binadhan-13 and NERICA mutant”
Claim · model-written summary
A drought tolerance mechanism was found in the rice NERICA mutant genotype.
- Taxon
- RiceOryza sativat0
- Material
- NERICA mutante1
- Outcome
- drought tolerance mechanisme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e1“drought tolerance mechanism was found in genotypes Binadhan-13 and NERICA mutant”
The same questions in other papers
drought · yield · Oryza sativa (rice)Positive and negative results
75 papers in the same direction as this paper · 246 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- negative
321 papers more in this group
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