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The absence of an effect of the na/ca ratio on sodium chloride uptake by rice (Oryza sativa l.).
journal contribution
posted on 2023-06-08, 11:35 authored by A R Yeo, Tim FlowersThe effect of the Na/Ca ratio in the growth medium on the response of the salt-sensitive crop species Oryza sativa L. to NaCl salinity was investigated. No effects on growth or salt concentration in the shoot were found over a range of Na/Ca ratios (5 to 25) considered likely to be commonly encountered in saline situations in the field, and even at extreme Na/Ca ratios (100 to 500) there were only marginal increases in NaCl entry to the shoot. Increasing the Ca concentration in the growth medium over a wide range did not, therefore, ameliorate the effects of salinity on rice seedlings. Polyethylene giycol at low, osmotically negligible, concentrations reduced the movement of CI to the shoot by 60 to 70% even in the presence of adequate (3.5 mol m-3) Ca. It is concluded that membranes of rice roots respond weakly to Ca and that they are capable of better permeability control than is evoked by Ca ions. The relevance of this to the salt sensitivity of rice is discussed.
History
Publication status
- Published
Journal
New PhytologistISSN
0028-646XPublisher
Blackwell PublishingIssue
1Volume
99Page range
81-90Department affiliated with
- Evolution, Behaviour and Environment Publications
Notes
Times Cited: 53 Yeo, ar flowers, tjFull text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-05-08Usage metrics
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