Abstract
ABSTRACT: Priming associated with signaling molecules is an effective technique to promote uniform and rapid germination in the field, in addition to increasing stress tolerance. This study aimed to evaluate the effect of priming solutions on tolerance to cadmium and salinity stress in two upland rice cultivars, Douradão and Soberana. Five priming agents were tested: indole acetic acid (IAA), melatonin, sodium nitroprusside (SNP), hydrogen peroxide (H2O2) and chitosan. After treatment, the seeds were subjected to three germination conditions: control (no stress), saline stress and cadmium stress. Evaluations included seed moisture content, germination percentage, seedling growth and activity of antioxidant enzymes (superoxide dismutase - SOD, catalase - CAT and ascorbate peroxidase - APX). The results showed that the effects of priming varied according to the type of stress and the agent used. Under saline stress, H2O2 favored germination and root growth, while under cadmium stress, IAA, melatonin and H2O2 were more effective. Chitosan induced high SOD activity in the cadmium stress, and SNP stood out for salinity. H2O2 increased APX activity in the cultivar Soberana, while SNP was more effective for Douradão in both stress conditions. Catalase was activated by H2O2 and melatonin. The study concludes that SNP, H2O2 and IAA can improve stress tolerance during rice seed germination by activating antioxidant systems that favor growth under adverse conditions.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 13
Claim · model-written summary
H2O2 favored germination and root growth under saline stress.
- Taxon
- upland rice
Oryza sativat0 - Treatment
- H2O2e0
- Outcome
- germination and root growthe0
- Direction
- favorede0
- Qualifier
- Under saline stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“Under saline stress, H2O2 favored germination and root growth”
Claim · model-written summary
IAA was more effective under cadmium stress.
- Taxon
- upland riceOryza sativat0
- Treatment
- IAAe0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Qualifier
- under cadmium stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“under cadmium stress, IAA, melatonin and H2O2 were more effective”
Claim · model-written summary
Melatonin was more effective under cadmium stress.
- Taxon
- upland riceOryza sativat0
- Treatment
- melatonine0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Qualifier
- under cadmium stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“under cadmium stress, IAA, melatonin and H2O2 were more effective”
Claim · model-written summary
H2O2 was more effective under cadmium stress.
- Taxon
- upland riceOryza sativat0
- Treatment
- H2O2e0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Qualifier
- under cadmium stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“under cadmium stress, IAA, melatonin and H2O2 were more effective”
Claim · model-written summary
Chitosan induced high SOD activity under cadmium stress.
- Taxon
- upland riceOryza sativat0
- Treatment
- Chitosane0
- Gene
- SODe0
- Outcome
- SOD activitye0
- Direction
- highe0
- Qualifier
- cadmium stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“Chitosan induced high SOD activity in the cadmium stress”
Claim · model-written summary
SNP stood out for salinity.
- Taxon
- upland riceOryza sativat0
- Treatment
- SNPe0
- Outcome
- stood oute0
- Direction
- stood oute0
- Qualifier
- salinitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“SNP stood out for salinity”
Claim · model-written summary
H2O2 increased APX activity in Soberana.
- Taxon
- upland riceOryza sativat0
- Material
- Soberanae0
- Treatment
- H2O2e0
- Gene
- APXe0
- Outcome
- APX activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“H2O2 increased APX activity in the cultivar Soberana”
Claim · model-written summary
SNP was more effective for Douradão under both stresses.
- Taxon
- upland riceOryza sativat0
- Material
- Douradãoe0
- Treatment
- SNPe0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Qualifier
- both stress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“SNP was more effective for Douradão in both stress conditions”
Claim · model-written summary
H2O2 activated catalase.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“Catalase was activated by H2O2 and melatonin”
Claim · model-written summary
Melatonin activated catalase.
- Taxon
- upland riceOryza sativat0
- Treatment
- melatonine0
- Gene
- Catalasee0
- Outcome
- Catalasee0
- Direction
- activatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e0“Catalase was activated by H2O2 and melatonin”
Claim · model-written summary
The authors concluded SNP can improve stress tolerance during rice seed germination.
- Taxon
- riceOryza sativae0
- Treatment
- SNPe0
- Outcome
- stress tolerance during rice seed germinatione0
- Qualifier
- by activating antioxidant systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP, H2O2 and IAA can improve stress tolerance during rice seed germination by activating antioxidant systems that favor growth under adverse conditions”
Claim · model-written summary
The authors concluded H2O2 can improve stress tolerance during rice seed germination.
- Taxon
- riceOryza sativae0
- Treatment
- H2O2e0
- Outcome
- stress tolerance during rice seed germinatione0
- Qualifier
- by activating antioxidant systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP, H2O2 and IAA can improve stress tolerance during rice seed germination by activating antioxidant systems that favor growth under adverse conditions”
Claim · model-written summary
The authors concluded IAA can improve stress tolerance during rice seed germination.
- Taxon
- riceOryza sativae0
- Treatment
- IAAe0
- Outcome
- stress tolerance during rice seed germinatione0
- Qualifier
- by activating antioxidant systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP, H2O2 and IAA can improve stress tolerance during rice seed germination by activating antioxidant systems that favor growth under adverse conditions”
The same questions in other papers
hydrogen peroxide · physiology: antioxidant enzymes · Oryza sativa (rice)Results differ
5 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- no effect
6 papers more in this group
See all 10 papers →hydrogen peroxide · growth · Oryza sativa (rice)Results differ
16 papers in the same direction as this paper · 5 in the opposite direction
- positive
- negative
- negative
18 papers more in this group
See all 22 papers →chitosan · physiology: antioxidant enzymes · Oryza sativa (rice)Results agree
10 papers in the same direction as this paper
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →melatonin · physiology: antioxidant enzymes · Oryza sativa (rice)Results agree
12 papers in the same direction as this paper
- positive
- positive
- positive
9 papers more in this group
See all 13 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.