File(s) not publicly available
Silicon decreases chloride transport in rice (Oryza sativa L.) in saline conditions
journal contribution
posted on 2023-06-08, 16:36 authored by Yu Shi, Yichao Wang, Tim Flowers, Haijun GongSilicon can alleviate salt damage to plants, although the mechanism(s) still remains to be elucidated. In this paper, we report the effect of silicon on chloride transport in rice (Oryza sativa L.) seedlings in saline conditions. In the absence of salinity, silicon enhanced the growth of shoots, but not roots in three cultivars (cv. GR4, IR36, and CSR10). Salinity reduced the growth of both shoots and roots in all three genotypes. In saline conditions, addition of silicon to the culture solution again improved the growth of shoots, but not of roots. Under these saline conditions, the concentrations of chloride in the shoot were markedly decreased by adding silicon and the ratio of K+/Cl- was significantly increased, while the concentration of chloride in the roots was unchanged. The decrease in chloride concentration in the shoot was correlated with the decrease in transpirational bypass flow in rice, as shown by the transport of the apoplastic tracer trisodium-8-hydroxy-1,3,6-pyrenetrisulphonic acid (PTS). Addition of silicon increased the net photosynthetic rate, stomata conductance, and transpiration of salt-stressed plants in cv. IR36, indicating that the reduction of chloride (and sodium) uptake by silicon was not through a reduction in transpiration rate. Silicon addition also increased the instantaneous water use efficiency of salt-stressed plants, while it did not change the relative growth rate of shoots. The results suggest that silicon addition decreased transpirational bypass flow in the roots, and therefore decreased the transport of chloride to the shoot. (c) 2013 Elsevier GmbH. All rights reserved.
History
Publication status
- Published
Journal
Journal of Plant PhysiologyISSN
0176-1617Publisher
ElsevierExternal DOI
Issue
9Volume
170Page range
847-853Department affiliated with
- Biology and Environmental Science Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2014-01-16Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC