Claim · model-written summary
Leaf blade Na+ concentration correlates highly with the SES senescence score across nearly all accessions of both species.
- Taxon
- O. sativa and O. glaberrima
Oryza sativa
Oryza glaberrimae3 - Organ / stage
- leaf bladee3
- Outcome
- whole-plant and leaf blade Na+ concentrationse3
- Direction
- highe3
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The correlation of salinity-induced senescence (as judged by the Standard Evaluation System for Rice, or SES, score) with whole-plant and leaf blade Na+ concentrations was high across nearly all accessions, and was almost identical in both O. sativa and O. glaberrima”
Title
John Damien Platten; James A Egdane; Abdelbagi M Ismail BMC Plant Biology 2013. doi:10.1186/1471-2229-13-32
Other claims from this paper (14)
- Observation Many of the 103 O. sativa accessions were newly identified as salt tolerant, with moderate to high tolerance of high salinity.
- Observation O. glaberrima shows significant salt tolerance, reported for the first time.
- Association Leaf Na+ concentration is only very weakly associated with cultivar-groups.
- Association Leaf Na+ concentration is generally strongly associated with the OsHKT1;5 allele.
- Observation Seven major and three minor alleles of OsHKT1;5 were identified.
- Association The Aromatic OsHKT1;5 allele gives the highest Na+ exclusion.
- Association The Japonica OsHKT1;5 allele gives the least Na+ exclusion.
- Observation A number of accessions do not follow the association with the OsHKT1;5 allele.
- Mechanism The exceptions probably reflect additional highly effective Na+ exclusion mechanisms.
- Observation Two landraces, one from Thailand and one from Senegal, show high tissue tolerance.
- Observation Significant variation in salinity tolerance exists within both cultivated Oryza species.
- Observation Genetic variation appears to exist for several mechanisms that affect leaf Na+ concentration.
- Mechanism The major tolerance mechanisms in these species limit sodium uptake and accumulation in active leaves.
- Recommendation The identified mechanisms show great promise for improving rice salt tolerance over current donors.