Abstract
A solution culture experiment was conducted to study the effects of K~+ on plant height,root length,fresh weight of shoot or root,leaf bronzing index and chlorophyll content of three rice genotypes,Asominori(Fe~(2+) tolerant genotype),IR24(Fe~(2+) sensitive genotype) and Line22 of chromosome segment substitution lines(Fe~(2+) sensitive genotype)under 250 mg·L~(-1) Fe~(2+) stress.The results showed that the growth of rice shoot and root was inhibited by Fe~(2+) stress compared to control.After 250 mg·L~(-1) Fe~(2+) treatment,the chlorophyll content was decreased,leaf bronzing occurred and leaf bronzing index could be calculated.Along with the increase of the concentration of K~+ treatment,the inhibition of the growth of rice shoot and root by Fe~(2+) stress was decreased,the chlorophyll content in the leaves increased,and leaf bronzing index reduced in three rice genotypes.The amelioration of K~+ was more pronounced on the sensitive genotype(IR24,Line22) than that on tolerant genotype(Asominori),which indicates that the different genotype exists in the amelioration of K~+ on Fe~(2+) stress.It suggests that K~+ could play an important role in increasing rice resistance to Fe~(2+) stress.
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Claims 7
Claim · model-written summary
Fe~(2+) stress inhibited rice shoot and root growth relative to control.
- Taxon
- rice
Oryza sativae0 - Treatment
- Fe~(2+) stresse0
- Outcome
- growth of rice shoot and roote0
- Direction
- inhibitede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth of rice shoot and root was inhibited by Fe~(2+) stress compared to control”
Claim · model-written summary
Fe~(2+) treatment decreased rice chlorophyll content.
- Taxon
- riceOryza sativat0
- Treatment
- 250 mg·L~(-1) Fe~(2+) treatmente0
- Outcome
- chlorophyll contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 250 mg·L~(-1) Fe~(2+) treatment,the chlorophyll content was decreased”
t0“rice”
t1“rice”
Claim · model-written summary
Fe~(2+) treatment caused leaf bronzing in rice.
- Taxon
- riceOryza sativat0
- Treatment
- 250 mg·L~(-1) Fe~(2+) treatmente0
- Outcome
- leaf bronzing occurrede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 250 mg·L~(-1) Fe~(2+) treatment,the chlorophyll content was decreased,leaf bronzing occurred”
t0“rice”
t1“rice”
Claim · model-written summary
Increasing K~+ concentration lessened inhibition of rice shoot and root growth under Fe~(2+) stress.
- Taxon
- riceOryza sativae0
- Treatment
- K~+ treatmente0
- Outcome
- inhibition of the growth of rice shoot and roote0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Along with the increase of the concentration of K~+ treatment,the inhibition of the growth of rice shoot and root by Fe~(2+) stress was decreased”
Claim · model-written summary
Increasing K~+ concentration increased rice leaf chlorophyll content under Fe~(2+) stress.
- Taxon
- riceOryza sativat0
- Treatment
- K~+e1
- Outcome
- chlorophyll content in the leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the chlorophyll content in the leaves increased”
t0“rice”
t1“rice”
e1“concentration of K~+ treatment”
Claim · model-written summary
Increasing K~+ concentration reduced the rice leaf bronzing index under Fe~(2+) stress.
- Taxon
- riceOryza sativat0
- Treatment
- K~+e1
- Outcome
- leaf bronzing indexe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf bronzing index reduced in three rice genotypes”
t0“rice”
t1“rice”
e1“concentration of K~+ treatment”
Claim · model-written summary
K~+ amelioration was more pronounced in sensitive IR24 and Line22 than tolerant Asominori.
- Taxon
- riceOryza sativat0
- Material
- IR24,Line22e0
- Outcome
- amelioration of K~+e0
- Direction
- more pronouncede0
- Comparator
- Asominorie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amelioration of K~+ was more pronounced on the sensitive genotype(IR24,Line22) than that on tolerant genotype(Asominori)”
t0“rice”
t1“rice”
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