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

Shuyskaya, E. V.; Рахманкулова, З. Ф.; Toderich, Kristina

doi:10.1007/978-3-030-17854-3_75-1

Cited by 3 publications

(2 citation statements)

References 49 publications

(112 reference statements)

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“…For example, the accumulation of proline protects and stabilizes ROS-scavenging enzymes, activates alternative detoxification pathways, and enhances the activity of methylglyoxal detoxification enzymes, peroxidase, glutathione S-transferase, superoxide dismutase, and catalase. It also increases the glutathione redox state under salt stress (Shuyskaya et al 2020). Interestingly, they accomplish these protective functions without negatively impacting cellular metabolism while safeguarding the integrity of the cell membrane (Slama et al 2015).…”

Section: Primary Metabolismmentioning

confidence: 99%

NaCl elicitation enhances metabolite accumulation and stress resilience in Inula crithmoides L. shoot cultures: implications for its nutritional and medicinal value

Rodrigues,

Neng,

Custódio

2024

Plant Cell Tiss Organ Cult

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This study explored the impact of sodium chloride (NaCl) elicitation on the accumulation of primary and secondary metabolites and the oxidative stress responses of Inula crithmoides L. (golden samphire) in vitro shoot cultures. Elicitation involved applying different concentrations of NaCl (0, 50, 100, and 200 mM) for 4 weeks. This was followed by assessing its impact on plant growth, physiological parameters (pigments, hydrogen peroxide content, total soluble sugars and proteins, and proline), and secondary metabolism (phenylalanine ammonia-lyase activity, shikimic acid, phenolics, flavonoids, and hydroxycinnamic acids) in the shoots. The extracts were also analysed using high-performance liquid chromatography (HPLC). The NaCl elicitation did not affect shoot growth but increased physiological functions such as photosynthesis and oxidative stress management under moderate salinity levels. In addition, NaCl treatments increased the synthesis of soluble sugars and proteins, particularly proline, as well as bioactive phenolics such as gentisic acid, chlorogenic acid, 4-hydroxybenzoic acid, luteolin-7-O-glucoside, and naringenin-7-O-glucoside. The NaCl elicitation in golden samphire shoot cultures offers a significant method for enhancing the production of important nutritional and bioactive compounds. This underscores the species’ potential for cultivation in saline environments and provides valuable prospects for its utilization in the health and nutrition sectors.

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Section: Primary Metabolismmentioning

confidence: 99%

NaCl elicitation enhances metabolite accumulation and stress resilience in Inula crithmoides L. shoot cultures: implications for its nutritional and medicinal value

Rodrigues,

Neng,

Custódio

2024

Plant Cell Tiss Organ Cult

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“…It is known that P5CS1 (stress-specific isoform of proline) is localized in the cytosol and chloroplast (Szabados and Savoure, 2010;Kaur and Asthir, 2015). In chloroplasts, NADPH for P5CS1 synthesis comes from the photosynthetic electron transport chain (Liang et al, 2013;Shuyskaya et al, 2020b).…”

Section: Response To 4-10-days Of 200 мм Nacl Treatmentmentioning

confidence: 99%

Intensity and duration of salinity required to form adaptive response in C4 halophyte Kochia prostrata (L.) Shrad

Shuyskaya

Рахманкулова²,

Prokofieva³

et al. 2022

Front. Plant Sci.

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Plant adaptation to salinity is a highly multifaceted process, harnessing various physiological mechanisms depending on the severity and duration of salt stress. This study focuses on the effects of 4- and 10-day treatments with low (100 mM NaCl) and moderate (200 mM NaCl) salinity on growth, CO2/H2O gas exchange, stomatal apparatus performance, the efficiency of photosystems I and II (PS I and II), content of key C4 photosynthesis enzymes, and the accumulation of Na+, K+, and proline in shoots of the widespread forage C4 halophyte Kochia prostrata. Our data show that 4 days of low salinity treatment resulted in a decrease in biomass, intensity of apparent photosynthesis, and cyclic electron transport around PS I. It was accompanied by an increase in transpiration and Rubisco and PEPC contents, while the Na+ and proline contents were low in K. prostrata shoots. By the 10th day of salinity, Na+ and proline have accumulated; PS I function has stabilized, while PS II efficiency has decreased due to the enhanced non-photochemical quenching of chlorophyll fluorescence (NPQ). Thus, under low salinity conditions, Na+ accumulated slowly and the imbalance between light and dark reactions of photosynthesis was observed. These processes might be induced by an early sodium signaling wave that affects cellular pH and ion homeostasis, ultimately disturbing photosynthetic electron transport. Another adaptive reaction more “typical” of salt-tolerant species was observed at 200 mM NaCl treatment. It proceeds in two stages. First, during the first 4 days, dry biomass and apparent photosynthesis decrease, whereas stomata sensitivity and dissipation energy during dark respiration increase. In parallel, an active Na+ accumulation and a decreased K+/Na+ ratio take place. Second, by the 10th day, a fully-fledged adaptive response was formed, when growth and apparent photosynthesis stabilized and stomata closed. Decreased dissipation energy, increased WUE, stabilization of Rubisco and PEPC contents, and decreased proline content testify to the completion of the adaptation and stabilization of the physiological state of plants. The obtained results allowed us to conclude that the formation of a full-fledged salt-tolerant response common for halophytes in K. prostrata occurs by the 10th day of moderate salinity.

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Concluding Remarks and Future Prospects

Öztürk

Altay

Nazish

et al. 2023

Halophyte Plant Diversity and Public Health

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

Cited by 3 publications

References 49 publications

NaCl elicitation enhances metabolite accumulation and stress resilience in Inula crithmoides L. shoot cultures: implications for its nutritional and medicinal value

NaCl elicitation enhances metabolite accumulation and stress resilience in Inula crithmoides L. shoot cultures: implications for its nutritional and medicinal value

Intensity and duration of salinity required to form adaptive response in C4 halophyte Kochia prostrata (L.) Shrad

Concluding Remarks and Future Prospects

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