Abstract
Fe-toxicity is a critical and complicated constraint to rice growth that requires simple and quick screening methods for selection of tolerant rice to Fe-stress. This study revealed relative changes in the growth and recovery of rice responding to Fe-toxicity at germination and vegetative stages. Two rice cultivars were exposed to iron concentrations of 0, 50, 100, and 200 ppm at the germination stage and Fe–treatment of 50 – 100 and 100 – 200 ppm at the vegetative stage. Increasing Fe-toxicity reduced germination rates, seedling height, length and number of seedling roots. However, relative reduction to control in seedling height and root length at germination could be more dependable to check genotypes tolerant to Fe stress than other parameters. Growth characteristics measured at 6, 12, 18, and 24-day excess Fe indicated that plant height, number of tillers, and leaves were kept slightly relative increasing to control until 18-day and 12-day, respectively. In contrast, root length and root number decreased as soon as plants were exposed to Fe-stress. Relative decrease in growth to control increased with higher iron concentration and longer exposure time. Plants exhibited ability to recover after 24-day under stress with relative increase to the point before stress relieving from 3 – 12% for plant height, 1-11% for tiller number, and 7-19% for root number. There were significant differences between two cultivars for relative changes in growth and recovery parameters, suggesting a simple and efficient method, and suitable growth parameters for evaluating and selecting tolerant genotypes to Fe-stress at germination and vegetative stages.
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Claims 12
Claim · model-written summary
Increasing iron toxicity reduced rice germination rates.
- Taxon
- Rice
Oryza sativat0 - Treatment
- Fe-toxicitye0
- Outcome
- germination ratese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing Fe-toxicity reduced germination rates, seedling height, length and number of seedling roots.”
t0“Rice”
Claim · model-written summary
Increasing iron toxicity reduced seedling height and root length and number.
- Taxon
- RiceOryza sativat0
- Treatment
- Fe-toxicitye0
- Outcome
- seedling height, length and number of seedling rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing Fe-toxicity reduced germination rates, seedling height, length and number of seedling roots.”
t0“Rice”
Claim · model-written summary
Relative seedling height and root length reductions at germination may better screen iron tolerance than other parameters.
- Taxon
- RiceOryza sativat0
- Outcome
- relative reduction to control in seedling height and root length at germinatione0
- Direction
- more dependablee0
- Comparator
- other parameterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, relative reduction to control in seedling height and root length at germination could be more dependable to check genotypes tolerant to Fe stress than other parameters.”
t0“Rice”
Claim · model-written summary
Plant height, tiller number and leaves rose slightly relative to controls until stated exposure days.
- Taxon
- RiceOryza sativat0
- Treatment
- excess Fee0
- Outcome
- plant height, number of tillers, and leavese0
- Direction
- increasinge0
- Qualifier
- until 18-day and 12-day, respectivelye0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth characteristics measured at 6, 12, 18, and 24-day excess Fe indicated that plant height, number of tillers, and leaves were kept slightly relative increasing to control until 18-day and 12-day, respectively.”
t0“Rice”
Claim · model-written summary
Root length and root number declined as soon as rice encountered iron stress.
- Taxon
- RiceOryza sativat0
- Treatment
- Fe-stresse0
- Outcome
- root length and root numbere0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast, root length and root number decreased as soon as plants were exposed to Fe-stress.”
t0“Rice”
Claim · model-written summary
Relative growth reduction grew with higher iron concentration.
- Taxon
- RiceOryza sativat0
- Treatment
- higher iron concentratione0
- Outcome
- Relative decrease in growthe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative decrease in growth to control increased with higher iron concentration and longer exposure time.”
t0“Rice”
Claim · model-written summary
Relative growth reduction grew with longer exposure time.
- Taxon
- RiceOryza sativat0
- Treatment
- longer exposure timee0
- Outcome
- Relative decrease in growthe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative decrease in growth to control increased with higher iron concentration and longer exposure time.”
t0“Rice”
Claim · model-written summary
After stress relief, plant height recovered by 3 – 12%.
- Taxon
- RiceOryza sativat0
- Outcome
- plant heighte0
- Direction
- increaseinferrede0
- Value
- 3 – 12%e0
- Qualifier
- after 24-day under stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants exhibited ability to recover after 24-day under stress with relative increase to the point before stress relieving from 3 – 12% for plant height, 1-11% for tiller number, and 7-19% for root number.”
t0“Rice”
Claim · model-written summary
After stress relief, tiller number recovered by 1-11%.
- Taxon
- RiceOryza sativat0
- Outcome
- tiller numbere0
- Direction
- increaseinferrede0
- Value
- 1-11%e0
- Qualifier
- after 24-day under stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants exhibited ability to recover after 24-day under stress with relative increase to the point before stress relieving from 3 – 12% for plant height, 1-11% for tiller number, and 7-19% for root number.”
t0“Rice”
Claim · model-written summary
After stress relief, root number recovered by 7-19%.
- Taxon
- RiceOryza sativat0
- Outcome
- root numbere0
- Direction
- increaseinferrede0
- Value
- 7-19%e0
- Qualifier
- after 24-day under stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants exhibited ability to recover after 24-day under stress with relative increase to the point before stress relieving from 3 – 12% for plant height, 1-11% for tiller number, and 7-19% for root number.”
t0“Rice”
Claim · model-written summary
Two cultivars differed significantly in relative growth and recovery changes.
- Taxon
- RiceOryza sativat0
- Material
- two cultivarse0
- Outcome
- relative changes in growth and recovery parameterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant differences between two cultivars for relative changes in growth and recovery parameters, suggesting a simple and efficient method, and suitable growth parameters for evaluating and selecting tolerant genotypes to Fe-stress at germination and vegetative stages.”
t0“Rice”
Claim · model-written summary
The authors propose growth and recovery parameters as a simple screening method for iron-tolerant genotypes.
- Taxon
- RiceOryza sativat0
- Outcome
- simple and efficient methode0
- Qualifier
- evaluating and selecting tolerant genotypese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant differences between two cultivars for relative changes in growth and recovery parameters, suggesting a simple and efficient method, and suitable growth parameters for evaluating and selecting tolerant genotypes to Fe-stress at germination and vegetative stages.”
t0“Rice”
The same questions in other papers
iron atom · growth · Oryza sativa (rice)Results differ
25 papers in the same direction as this paper · 36 in the opposite direction
- negative
- positive
- positive
58 papers more in this group
See all 62 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.