Variations in osmotic adjustment and water relations of Sphaerophysa kotschyana: Glycine betaine, proline and choline accumulation in response to salinity

Botanical Studies
Evren YildiztugayYagmur Duran

Abstract

Sphaerophysa kotschyana Boiss. is naturally distributed in overly salty regions. The key to the completion of the life cycles of S. kotschyana in harsh saline soils may be hidden in changes of its osmo-protectants, but there is currently no information about the interaction between osmotic adjustment and water relations in adaptation to saline conditions. The aim of this article was to determine growth, relative growth rate (RGR), relative water content (RWC), osmotic potential (ΨΠ), photosynthetic efficiency (Fv/Fm), thiobarbituric acid-reactive substances (TBARS) and osmo-protectant contents [proline (Pro), choline (Cho) and glycine betaine (GB)] in S. kotschyana leaves and roots exposed to 0, 150 or 300 mM NaCl for 7 and 14 d (days). The results clearly showed that the reductions in growth, RWC, Fv/Fm, RGR and ΨΠ were more pronounced at 300 mM, especially after 14 d. In the same group, the highest increase in TBARS was recorded in roots (126%) and leaves (31%). The induction at 150 mM was not as high. Therefore, roots appear to be the most vulnerable part of this plant. Moreover, S. kotschyana was able to withstand short-term low salinity. The osmo-protectant accumulation in S. kotschyana as a salinity acclimation or adaptat...Continue Reading

References

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Citations

Feb 1, 2020·Journal of the Science of Food and Agriculture·Alejandro Jiménez-GómezRaúl Rivas

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Datasets Mentioned

BETA
EY2150

Methods Mentioned

BETA
environmental stresses
salt treatment

Software Mentioned

SPSS Statistics

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