Abstract
ABSTRACT Drought is a major abiotic constraint on rice (Oryza sativa L.) production in Malaysia. Malaysian Agricultural Research and Development Institute (MARDI) has released more than 50 indica rice genotypes so far. However, little has been studied about their drought tolerance. The study aimed to evaluate the germination and early seedling growth performances of 15 rice genotypes under polyethylene glycol (PEG) 6000-induced drought stresses. Four osmotic potentials of PEG 6000 (0, -0.3, -0.6, -0.9 MPa) were used in the study denoted as control, low, moderate and severe stresses respectively. Data on seed germination percentage, germination index, germination energy, germination rate, seedling height, seedling vigor I and II, fresh and dry weight of seedlings were measured. Studied parameters varied greatly among genotypes with different osmotic stresses. The findings suggested most of the rice genotypes showed an apparent reduction in germination and growth traits, while MR211 showed less reduction under all of the stresses. The Multivariate clustering grouped genotypes into five different clusters, where cluster V (MR220, MR269, MR253, MR297, MR303 and MR284) incorporated six genotypes showed better germination and growth under different osmotic potentials, followed by cluster IV (MR211 and MR307). Cluster II incorporated one genotype MARDI WARNA98 which had minimal germination and growth attributes. Principal component analysis (PCA) was performed to identify the maximum contributing variables for diversity, revealed maximum variation by first two components (81.8% and 7.7%) respectively. Therefore, PEG 6000 can be used as an efficient tool for discrimination and identification of drought tolerance in rice.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Most rice genotypes showed reduced germination and growth traits under PEG-induced drought stress.
- Taxon
- rice
Oryza sativae2 - Treatment
- polyethylene glycol (PEG) 6000-induced drought stressese1
- Outcome
- germination and growth traitse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of the rice genotypes showed an apparent reduction in germination and growth traits”
e1“polyethylene glycol (PEG) 6000-induced drought stresses”
e2“Drought is a major abiotic constraint on rice (Oryza sativa L.) production”
Claim · model-written summary
MR211 rice showed less reduction in germination and growth traits across all stresses.
- Taxon
- riceOryza sativae2
- Material
- MR211e0
- Outcome
- germination and growth traitse1
- Direction
- less reductione0
- Qualifier
- under all of the stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MR211 showed less reduction under all of the stresses”
e1“germination and growth traits”
e2“Malaysian indica rice genotypes”
Claim · model-written summary
Cluster V genotypes MR220, MR269, MR253, MR297, MR303 and MR284 had better germination and growth across osmotic potentials.
- Taxon
- riceOryza sativae1
- Material
- MR220, MR269, MR253, MR297, MR303 and MR284e0
- Outcome
- germination and growthe0
- Direction
- bettere0
- Qualifier
- under different osmotic potentialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cluster V (MR220, MR269, MR253, MR297, MR303 and MR284) incorporated six genotypes showed better germination and growth under different osmotic potentials”
e1“Malaysian indica rice genotypes”
Claim · model-written summary
Cluster IV rice genotypes MR211 and MR307 ranked next for germination and growth.
- Taxon
- riceOryza sativae2
- Material
- MR211 and MR307e0
- Outcome
- germination and growthe1
- Direction
- bettere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by cluster IV (MR211 and MR307)”
e1“better germination and growth under different osmotic potentials”
e2“Malaysian indica rice genotypes”
Claim · model-written summary
MARDI WARNA98 rice had minimal germination and growth attributes.
- Taxon
- riceOryza sativae1
- Material
- MARDI WARNA98e0
- Outcome
- germination and growth attributese0
- Direction
- minimale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MARDI WARNA98 which had minimal germination and growth attributes”
e1“Malaysian indica rice genotypes”
Claim · model-written summary
The first principal component accounted for 81.8% of variation among rice genotypes.
- Taxon
- riceOryza sativae1
- Outcome
- variatione0
- Value
- 81.8%e0
- Qualifier
- first two componentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum variation by first two components (81.8% and 7.7%) respectively”
e1“Malaysian indica rice genotypes”
Claim · model-written summary
The second principal component accounted for 7.7% of variation among rice genotypes.
- Taxon
- riceOryza sativae1
- Outcome
- variatione0
- Value
- 7.7%e0
- Qualifier
- first two componentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum variation by first two components (81.8% and 7.7%) respectively”
e1“Malaysian indica rice genotypes”
Claim · model-written summary
The authors propose PEG 6000 as an efficient tool to distinguish drought tolerance in rice.
- Taxon
- riceOryza sativae0
- Outcome
- discrimination and identification of drought tolerancee0
- Qualifier
- efficient toole0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PEG 6000 can be used as an efficient tool for discrimination and identification of drought tolerance in rice”
The same questions in other papers
poly(ethylene glycol) · growth · Oryza sativa (rice)Positive and negative results
19 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
25 papers more in this group
See all 29 papers →drought · growth · Oryza sativa (rice)Positive and negative results
183 papers in the same direction as this paper · 98 in the opposite direction
- negative
- negative
- positive
278 papers more in this group
See all 282 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.