File(s) not publicly available
Sodium and potassium transport to the xylem are inherited independently in rice, and the mechanism of sodium: potassium selectivity differs between rice and wheat
journal contribution
posted on 2023-06-08, 11:32 authored by A Garcia, C A Rizzo, J Ud-Din, S L Bartos, D Senadhira, Tim Flowers, A R YeoThe heritability of sodium and potassium transport to the xylem was measured by the regression of Fn+1 on F-n means in two segregating breeding populations of rice (Oryza sativa L.). The narrow-sense heritabilities of shoot sodium concentration were 0.42 and 0.43 in the two populations, respectively, and the corresponding values for the heritability of shoot potassium concentration were 0.46 and 0.52. The sodium: potassium ratio was apparently heritable (0.36 and 0.40) because it was regressed positively on sodium concentration and negatively on potassium concentration. There was no significant relationship between the shoot sodium and potassium concentrations themselves. It is concluded that sodium and potassium uptake in rice are controlled by different genes which segregate independently. The magnitude of the transpirational bypass flow was estimated to be some 10 times greater in rice than in wheat (Triticum aestivum L.) and was found to be highly correlated with sodium uptake in rice but not in wheat. It is concluded that the bypass flow provides an additional pathway for sodium uptake in rice and that this accounts for the functional and genetic independence of sodium and potassium uptake in rice and consequently for the lesser prominence of potassium:sodium discrimination in rice than in wheat.
History
Publication status
- Published
Journal
Plant, Cell & EnvironmentISSN
0140-7791Publisher
WileyIssue
9Volume
20Page range
1167-1174Department affiliated with
- Evolution, Behaviour and Environment Publications
Notes
Times Cited: 73 Garcia, A Rizzo, CA UdDin, J Bartos, SL Senadhira, D Flowers, TJ Yeo, ARFull text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-05-10Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC