Salt and osmotic stress tolerances of the C3–C4 xero-halophyte Bassia sedoides from two populations differ in productivity and genetic polymorphism

Shuyskaya, E. V.; Рахманкулова, З. Ф.; Voronin, P. Yu.; Kuznetsova, Nadezhda A.; Biktimerova, Gulnaz; Usmanov, I. Yu.

doi:10.1007/s11738-015-1981-x

Cited by 11 publications

(4 citation statements)

References 28 publications

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“…The opposite situation was observed in Bassia sedoides. Under experimental conditions, the proline content was 1.5-to 2fold lower in control plants and in plants treated by 100-200 mM NaCl than in plants under natural conditions (Shuyskaya et al 2015). In this case, perhaps, the action of one factor alone was not as stressful as the effects of multiple stress factors under natural conditions.…”

Section: Proline and Potassium In Halophytesmentioning

confidence: 74%

“…Proline accumulation under PEG-induced osmotic stress was indicated for succulent xerohalophyte Haloxylon aphyllum (Rakhmankulova et al 2014) and non-succulent xerohalophyte Bassia sedoides (Shuyskaya et al 2015), but not under NaCl-induced osmotic stress. In natural habitats, proline did not accumulate in both species under ionic stress, that is, with an increase in Na + content in plant tissues (Fig.…”

Section: Proline and Potassium In Halophytesmentioning

confidence: 96%

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Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes

Shuyskaya¹,

Рахманкулова²,

Toderich³

2020

Handbook of Halophytes

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This review considers the specific mechanisms of salinity adaptation in different salt-tolerant plant species. The differences among salt tolerance mechanisms are primarily associated with the organization of long-distance ion transport, including limitation of Na + and Cl À inflow to aboveground organs, their accumulation in vacuoles, or their excretion back to the environment (by salt glands on the leaf surface), maintaining a high K + /Na + ratio in the cytoplasm and additional synthesis of organic osmolytes. The review provides the current data on the role of proline, one of the most common organic osmolytes, in salinity adaptation in different plant species. Proline biosynthesis and catabolism regulation, as well as its multiple functions in plant cells, were described under normal and stress conditions. The changes in contents of proline and K + were analyzed in different types of halophytes, including salt-tolerant glycophytes, succulent euhalophytes, xerohalophytes, and recretohalophytes. Proline response to osmotic and ionic components of salinity, as well as its participation in fundamentally different adaptation mechanisms, was considered in different types of halophytes. The

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Section: Proline and Potassium In Halophytesmentioning

confidence: 74%

Section: Proline and Potassium In Halophytesmentioning

confidence: 96%

Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes

Shuyskaya¹,

Рахманкулова²,

Toderich³

2020

Handbook of Halophytes

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“…Under natural conditions, the most productive S. sedoides plants were found in habitats with a soil salinity of ~90 mM NaCl/kg soil [ 32 ]. In previous model experiments, long-term treatment with 200 mM NaCl was found to decrease plant biomass in some S. sedoides populations [ 33 , 34 ].…”

Section: Discussionmentioning

confidence: 99%

“…This result was probably due to the sodium ion concentration, which is not critical for S. sedoides (2.12 ± 0.31 mmol Na + /g DM) ( Figure 1 ). In natural habitats, and over a range of different salinities, S. sedoides maintains tissue Na + concentrations within the range of 2.1–2.7 mmol/g DM [ 32 , 36 ]. Thus, halophytes like S. sedoides may require this Na + concentration for optimal growth [ 18 , 24 ].…”

Section: Discussionmentioning

confidence: 99%

Salinity Mitigates the Negative Effect of Elevated Temperatures on Photosynthesis in the C3-C4 Intermediate Species Sedobassia sedoides

Shuyskaya,

Rakhmankulova,

Prokofieva

et al. 2024

Plants

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The adaptation of plants to combined stresses requires unique responses capable of overcoming both the negative effects of each individual stress and their combination. Here, we studied the C3-C4 (C2) halophyte Sedobassia sedoides in response to elevated temperature (35 °C) and salinity (300 mM NaCl) as well as their combined effect. The responses we studied included changes in water–salt balance, light and dark photosynthetic reactions, the expression of photosynthetic genes, the activity of malate dehydrogenase complex enzymes, and the antioxidant system. Salt treatment led to altered water–salt balance, improved water use efficiency, and an increase in the abundance of key enzymes involved in intermediate C3-C4 photosynthesis (i.e., Rubisco and glycine decarboxylase). We also observed a possible increase in the activity of the C2 carbon-concentrating mechanism (CCM), which allowed plants to maintain high photosynthesis intensity and biomass accumulation. Elevated temperatures caused an imbalance in the dark and light reactions of photosynthesis, leading to stromal overreduction and the excessive generation of reactive oxygen species (ROS). In response, S. sedoides significantly activated a metabolic pathway for removing excess NADPH, the malate valve, which is catalyzed by NADP-MDH, without observable activation of the antioxidant system. The combined action of these two factors caused the activation of antioxidant defenses (i.e., increased activity of SOD and POX and upregulation of FDI), which led to a decrease in oxidative stress and helped restore the photosynthetic energy balance. Overall, improved PSII functioning and increased activity of PSI cyclic electron transport (CET) and C2 CCM led to an increase in the photosynthesis intensity of S. sedoides under the combined effect of salinity and elevated temperature relative to high temperature alone.

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Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes

Shuyskaya

Рахманкулова

Toderich

2021

Handbook of Halophytes

View full text Add to dashboard Cite

Salt and osmotic stress tolerances of the C3–C4 xero-halophyte Bassia sedoides from two populations differ in productivity and genetic polymorphism

Cited by 11 publications

References 28 publications

Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes

Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes

Salinity Mitigates the Negative Effect of Elevated Temperatures on Photosynthesis in the C3-C4 Intermediate Species Sedobassia sedoides

Role of Proline and Potassium in Adaptation to Salinity in Different Types of Halophytes

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