Abstract
Optically active alpha-methylbenzyl phenyl ureas (MBPUs) show diverse plant physiological properties. Experiments were conducted to evaluate the salt-stress response of just-germinated rice seedlings supplemented with the S-enantiomer of MBPUs by assessing the growth and Na+ content. This study indicates that S-MBPUs served as a unique stress reliever for just-germinated young seedlings of rice injured by salinity. NaCl severely affected the root growth of rice seedlings. Concomitant treatment with S-MBPUs effectively ameliorated the growth inhibition of rice by NaCl. Glycine betaine (GB) did not act as a reliever of the NaCl stress. The addition of S-alpha-methylbenzyl 2-fluoro-4-methylphenyl urea (7, denoted as S-FM) to the saline medium ameliorated not only the root growth but also the protein content and dry weight of roots depending upon its concentration. The protein content, Na+ content and growth rate were correlated to each other with a positive relationship. The Na+ distribution ratio (S/R(Na+)) between the shoot and root increased with increasing concentration of NaCl when added alone, viz. with increasing growth reduction. A concomitant treatment with S-FM (7), however, resulted in the S/R(Na+) value becoming smaller with growth amelioration. This indicates that S-FM (7) controlled the translation of Na+ from the roots to shoots. S-FM (7) would have influenced some inherent functions connected with the Na+ behavior in the rice plant, although details of the mechanism for normalization of the S/R(Na+) ratio are still not clear.
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Claims 10
Claim · model-written summary
NaCl severely inhibited rice seedling root growth.
- Taxon
- rice
Oryza sativae0 - Treatment
- NaCle0
- Outcome
- root growthe0
- Direction
- severely affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl severely affected the root growth of rice seedlings”
Claim · model-written summary
Concomitant S-MBPUs ameliorated NaCl-related rice growth inhibition.
- Taxon
- riceOryza sativae0
- Treatment
- Concomitant treatment with S-MBPUse0
- Outcome
- growth inhibitione0
- Direction
- amelioratede0
- Comparator
- NaCle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concomitant treatment with S-MBPUs effectively ameliorated the growth inhibition of rice by NaCl”
Claim · model-written summary
Glycine betaine did not relieve NaCl stress in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- Glycine betaine (GB)e0
- Outcome
- NaCl stresse0
- Comparator
- NaCle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glycine betaine (GB) did not act as a reliever of the NaCl stress”
t0“Rice”
Claim · model-written summary
S-FM addition ameliorated rice root growth in saline medium.
- Taxon
- RiceOryza sativat0
- Treatment
- S-alpha-methylbenzyl 2-fluoro-4-methylphenyl ureae0
- Outcome
- root growthe0
- Direction
- amelioratede0
- Comparator
- saline mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of S-alpha-methylbenzyl 2-fluoro-4-methylphenyl urea (7, denoted as S-FM) to the saline medium ameliorated not only the root growth but also the protein content and dry weight of roots depending upon its concentration”
t0“Rice”
Claim · model-written summary
S-FM addition ameliorated root protein content and dry weight in saline medium.
- Taxon
- RiceOryza sativat0
- Treatment
- S-alpha-methylbenzyl 2-fluoro-4-methylphenyl ureae0
- Outcome
- protein content and dry weight of rootse0
- Direction
- amelioratede0
- Qualifier
- depending upon its concentratione0
- Comparator
- saline mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of S-alpha-methylbenzyl 2-fluoro-4-methylphenyl urea (7, denoted as S-FM) to the saline medium ameliorated not only the root growth but also the protein content and dry weight of roots depending upon its concentration”
t0“Rice”
Claim · model-written summary
Protein content, sodium content and growth rate were positively correlated in rice.
- Taxon
- RiceOryza sativat0
- Compound
- Na+e0
- Outcome
- growth ratee0
- Direction
- positive relationshipe0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The protein content, Na+ content and growth rate were correlated to each other with a positive relationship”
t0“Rice”
Claim · model-written summary
The shoot-to-root Na+ distribution ratio rose with increasing NaCl concentration.
- Taxon
- RiceOryza sativat0
- Treatment
- NaCle0
- Outcome
- Na+ distribution ratio (S/R(Na+))e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Na+ distribution ratio (S/R(Na+)) between the shoot and root increased with increasing concentration of NaCl when added alone”
t0“Rice”
Claim · model-written summary
S-FM reduced the shoot-to-root Na+ ratio while improving growth.
- Taxon
- RiceOryza sativat0
- Treatment
- S-FM (7)e0
- Outcome
- S/R(Na+) valuee0
- Direction
- smallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A concomitant treatment with S-FM (7), however, resulted in the S/R(Na+) value becoming smaller with growth amelioration”
t0“Rice”
Claim · model-written summary
S-FM coincided with growth amelioration.
- Taxon
- RiceOryza sativat0
- Treatment
- S-FM (7)e0
- Outcome
- growth amelioratione0
- Direction
- amelioratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A concomitant treatment with S-FM (7), however, resulted in the S/R(Na+) value becoming smaller with growth amelioration”
t0“Rice”
Claim · model-written summary
The authors interpreted S-FM as controlling Na+ movement from rice roots to shoots.
- Taxon
- RiceOryza sativat0
- Treatment
- S-FM (7)e0
- Outcome
- translation of Na+ from the roots to shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S-FM (7) controlled the translation of Na+ from the roots to shoots”
t0“Rice”
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