Sodium and proline accumulation as osmoregulators in tolerance of sugar beet genotypes to salinity

Twenty eight sugar beet genotypes were analysed for their tolerance at 3 NaCl levels (0, 3000 and 6000 mg NaCl kg(-1) soil) and Na+, K+, Na+/K+ and free proline were measured from the leaf samples. Results showed that increasing salinity level caused an increase in Na+, Na+/K+ and proline, but a dec...

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Bibliographic Details
Published inPakistan journal of biological sciences Vol. 10; no. 22; pp. 4081 - 4086
Main Authors Pakniyat, H, Armion, M
Format Journal Article
LanguageEnglish
Published Pakistan 15.11.2007
Subjects
Agriculture - methods
Beta vulgaris - genetics
Genotype
Iran
Osmosis
Potassium - chemistry
Pressure
Proline - chemistry
Salinity
Salts - pharmacology
Sodium - chemistry
Sodium - metabolism
Soil
Water - chemistry
Water-Electrolyte Balance
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Summary:Twenty eight sugar beet genotypes were analysed for their tolerance at 3 NaCl levels (0, 3000 and 6000 mg NaCl kg(-1) soil) and Na+, K+, Na+/K+ and free proline were measured from the leaf samples. Results showed that increasing salinity level caused an increase in Na+, Na+/K+ and proline, but a decrease in K+ content of leaf samples (p < or = 0.01). As compared to non-tolerant genotypes, tolerant ones accumulated more Na+ and Na+/K+ and proline and less K+. It seems that Na+ and proline accumulation in shoots are effective mechanisms for osmotic pressure adjustment and plant tolerance to salinity, a mechanism commonly seen in sugar beet ancestors.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1028-8880
DOI:10.3923/pjbs.2007.4081.4086