Genotypic variation in salinity tolerance of Distichlis spicata turf ecotypes

Marcum, Kenneth B.; Yensen, Nicholas P.; Leake, John E.

doi:10.1071/ea07164

Cited by 15 publications

(9 citation statements)

References 30 publications

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“…At higher levels of salt (85.5-170.9 mM), stylo 184 was able to maintain both the K + content and the K + :Na + ratio in both shoots and roots. Plants are able to cope with salt stress by maintaining a high cytoplasmic K + :Na + ratio (Blumwald 2000, Marcum et al 2007. As reported in soybean, germination at a higher tissue of Na + concentration in stylo 184 was associated with higher K + and Ca 2+ concentrations in the embryo axis (Hosseini et al 2002).…”

Section: Germination Growth and Ion Content In Seedlingmentioning

confidence: 88%

Variation in ion accumulation as a measure of salt tolerance in seedling and callus of Stylosanthes guianensis

Veraplakorn¹,

Nanakorn²,

Kaveeta³

et al. 2013

Theor. Exp. Plant Physiol.

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Seedlings of Stylosanthes guianensis CIAT 184 (Stylo 184) were germinated under salt-stress conditions (0-170.9 mM NaCl), and germination and ion content (Cl -, Na + , Ca 2+ , Mg 2+ and K + ) were measured after seven days. The salt treatment had no effect on the germination percentage, but the seedling showed reduced growth and displayed variation in ion uptake, thus accumulating Na + and Clin the roots. Callus produced from seedlings selected as salt sensitive (T1) or salt tolerant (T2, T3, T4 and T5) was examined for growth and ion content under the influence of NaCl (0-256.4 mM NaCl) after 15 days. The sensitive clone (T1) contained the lowest Na + and Clcontent with the highest percentage of K + contributing to osmolality, suggesting it possesses an ion regulation mechanism that is typical of glycophytes; i.e., osmotic potential was adjusted by accumulating K + . The other clones (T2, T3, T4 and T5) expressed different strategies (osmotic adjustment) to cope with salt stress. T5 showed the highest mean dry weight on salt medium and displayed more effective ion regulation by maintaining low Na + :K + and Na + :Ca 2+ ratios.T2 expressed high Na + and Clwith the highest percentage of Na + contribution to osmolality and water content (succulence). T3 and T4 had lower growth rates but similar ion regulation in relation to T5. Results indicated that the ion content can be used to discriminate salt sensitive and salt tolerant clones of Stylo 184.

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Section: Germination Growth and Ion Content In Seedlingmentioning

confidence: 88%

Variation in ion accumulation as a measure of salt tolerance in seedling and callus of Stylosanthes guianensis

Veraplakorn¹,

Nanakorn²,

Kaveeta³

et al. 2013

Theor. Exp. Plant Physiol.

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“…Salt tolerance was similar to that for D. spicata, which Yensen and Weber (1986). also showed about 50% reduction in RGR on 30 g L À1 water relative to freshwater controls (Marcum et al, 2007). However, D. palmeri RGR values were at the high end of those reported for D. spicata (Sargent et al, 2008) or other halophytic grasses Glenn, 1987).…”

Section: Growth Response To Salinitymentioning

confidence: 56%

Nipa (Distichlis palmeri): A perennial grain crop for saltwater irrigation

Pearlstein

Felger

Glenn

et al. 2012

Journal of Arid Environments

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“…Marcum et al [38] reported that the high Na + /K + ratio can disturb various enzymatic processes in the cytoplasm. Salt tolerant plants respond to elevated Na + content by maintaining low cytosolic Na + concentrations with high cytosolic K + /Na + ratios through the extrusion or intracellular compartmentalization [39].…”

Section: Resultsmentioning

confidence: 99%

Physiological and biochemical characterization of Sesamum germplasms tolerant to NaCl

2016

J App Biol Biotech

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Sesamum indicum L. (family-Pedaliaceae) is an economically important oil seed crop grown in tropical and subtropical countries. It is widely used in food, nutraceutical, pharmaceutical industries. Salinity is considered as the most important abiotic stress limiting to crop production. In this context, the present study was to evaluate the Sesamum genotypes for salinity tolerance. Germinated seedlings (15-d-old) were used to screen the germplsm at different concentrations (0, 25mM, 50mM, 75mM, 100mM) of NaCl and observation was taken after 15 th , 30 th and 45 th days of treatment. Ion content (Na + , Cl -, Ca ++ , Mg ++ and K ++ ) were measured after 15 days of treatment. Fresh and dry weight was less in salt sensitive genotypes than tolerant genotypes. During increase of salinity concentration, all the genotypes had a negative impact on roots. The seedlings showed reduced growth and displayed variation in ion uptake thus accumulating Na + and Cl -in the roots. At higher concentration of salt treatment showed the more dry weight and displayed more effective ion regulation by manipulating low Na + /K + and Na + /Ca ++ ratio. The tolerant genotypes exhibited the lowest shoot Na + content under salinity conditions. Higher proline accumulation was observed at 100 mM after 15 days of NaCl treatments in 'KM-13' genotype. After 15 days of treatment, the genotype 'ES 2138-2' showed maximum proline accumulation. The total carbohydrates contents increased in all the ten genotypes in presence of NaCl. Highest carbohydrate content was found in genotype 'SI-1926' grown in 100 mM NaCl. Enzyme activities are variable in different genotypes with different concentration of NaCl. This study will help in Sesamum improvement programme.

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Genotypic variation in salinity tolerance of Distichlis spicata turf ecotypes

Cited by 15 publications

References 30 publications

Variation in ion accumulation as a measure of salt tolerance in seedling and callus of Stylosanthes guianensis

Variation in ion accumulation as a measure of salt tolerance in seedling and callus of Stylosanthes guianensis

Nipa (Distichlis palmeri): A perennial grain crop for saltwater irrigation

Physiological and biochemical characterization of Sesamum germplasms tolerant to NaCl

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