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https://hdl.handle.net/2440/60575
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dc.contributor.author | Genc, Y. | - |
dc.contributor.author | Tester, M. | - |
dc.contributor.author | McDonald, G. | - |
dc.date.issued | 2010 | - |
dc.identifier.citation | Plant and Soil: international journal on plant-soil relationships, 2010; 327(1):331-345 | - |
dc.identifier.issn | 0032-079X | - |
dc.identifier.issn | 1573-5036 | - |
dc.identifier.uri | http://hdl.handle.net/2440/60575 | - |
dc.description.abstract | Supplemental calcium (Ca2+) is used in hydroponic studies on salinity to lessen the potential for Ca2+ deficiency. However, the Ca2+ concentration and the sodium (Na+): Ca2+ ratio used vary considerably. The implications of using a wide range of Na+: Ca2+ ratios for studies of salinity tolerance in wheat are not known. Also, despite the risk of development of Ca2+ deficiency under salinity stress, there are few reliable reports on the critical level of Ca2+ which can be used to diagnose Ca2+ deficiency in wheat. Two experiments were conducted to examine Ca2+ requirements of wheat under saline and non-saline conditions and to derive a critical level for Ca2+. Four bread wheat genotypes (Triticum aestivum L.) and a durum wheat genotype [Triticum turgidum subsp. durum) (Desf.) Husn.] with known differences in salinity tolerance were grown at 100 mM NaCl for four weeks with varying levels of external Ca2+ which resulted in Na+:Ca2+ ratios of 30, 20, 15, 5 and 2. The critical Ca2+ concentration was defined in a second experiment by growing the same wheat genotypes at seven levels of Ca2+ (0.05, 0.1, 0.2, 0.5, 1, 2 and 10 mM) under non-saline conditions. When grown at 100 mM NaCl salinity tolerance was greatest when the Na+:Ca2+ ratio ranged from 5 to 15. Growing plants at lower or higher Na+:Ca2+ ratios induced nutrient imbalances and additional osmotic stress which reduced the growth of plants. Transient Ca2+ deficiency occurred at high Na+:Ca2+ ratios and low Mg2+ occurred at the lowest Na+:Ca2+ ratio. Adding NaCl raised the tissue Na+ concentration and reduced the Ca2+ concentration and the most appropriate Na+:Ca2+ ratio in the solution was that which resulted in tissue Ca2+ concentrations similar to those of non-salinised plants. The critical level of Ca2+ in the youngest fully emerged leaf blades was 15–23 mmol kg-1 DW (600–900 mg kg-1 DW). | - |
dc.description.statementofresponsibility | Y. Genc, M. Tester and G.K. McDonald | - |
dc.language.iso | en | - |
dc.publisher | Kluwer Academic Publ | - |
dc.rights | © Springer Science + Business Media B.V. 2009 | - |
dc.source.uri | http://dx.doi.org/10.1007/s11104-009-0057-3 | - |
dc.subject | Critical deficiency concentration | - |
dc.subject | Na⁺:Ca²⁺ ratio | - |
dc.subject | Salinity | - |
dc.subject | Salinity tolerance | - |
dc.subject | Wheat | - |
dc.title | Calcium requirement of wheat in saline and non-saline conditions | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1007/s11104-009-0057-3 | - |
dc.relation.grant | ARC | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Genc, Y. [0000-0002-6302-6692] | - |
dc.identifier.orcid | McDonald, G. [0000-0002-7120-9042] | - |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 5 |
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