Acclimatisation of guard cell metabolism to long‐term salinity

Franzisky, Bastian L.; Geilfus, Christoph‐Martin; Romo‐Pèrez, M.L.; Fehrle, Ines; Erban, Alexander; Kopka, Joachim; Zörb, Christian

doi:10.1111/pce.13964

Cited by 16 publications

(10 citation statements)

References 87 publications

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“…Guard cells of the saltsensitive Arabidopsis cv Col-0 we investigated did not make use of this salt tolerance mechanism but increased expression of the K + release channel GORK. This finding is supported by a study on guard cells of the glycophyte Vicea faba which also cannot maintain a high K + : Na + ratio under salt stress (Franzisky et al, 2020). Patch-clamp studies on guard cells of the halophyte A. tripolium and the nonhalophyte A. amellus species have shown that both guard cell types are equipped with a similar array of cation channels, but their activities are differentially regulated by Na + in the two species, ultimately leading to a differential stomatal response (V ery et al, 1998).…”

Section: Discussionmentioning

confidence: 65%

“…Guard cells of the salt‐sensitive Arabidopsis cv Col‐0 we investigated did not make use of this salt tolerance mechanism but increased expression of the K + release channel GORK. This finding is supported by a study on guard cells of the glycophyte Vicea faba which also cannot maintain a high K + : Na + ratio under salt stress (Franzisky et al ., 2020).…”

Section: Discussionmentioning

confidence: 99%

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Under salt stress guard cells rewire ion transport and abscisic acid signaling

et al. 2021

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Plant productivity depends on optimal water-use efficiency and photosynthetic capacity balanced by stomatal conductance. Whether and how stomatal behavior contributes to salt sensitivity or tolerance is currently unknown. This work identifies guard cell-specific signaling networks exerted by a salt-sensitive and salt-tolerant plant under ionic and osmotic stress conditions accompanied with increasing NaCl loads.  We challenged soil grown Arabidopsis thaliana and Thellungiella salsuginea plants with shortand long-term salinity stress and monitored genome-wide gene expression and signals of guard cells that determine their function.  Arabidopsis plants suffered from both salt regimes and showed reduced stomatal conductance while Thellungiella displayed no obvious stress symptoms. The salt-dependent gene expression changes of guard cells supported the ability of the halophyte to maintain high potassium to sodium ratios and to attenuate the ABA signaling pathway which the glycophyte kept activated despite fading ABA levels.  Our study shows that salinity stress and even the different tolerance levels are manifested on a single cell level. Halophytic guard cells react less sensitive than glycophytic guard cells providing opportunities to manipulate stomatal behavior and improve plant productivity.

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Under salt stress guard cells rewire ion transport and abscisic acid signaling

et al. 2021

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“…Sour passion fruit leaf gas exchange was negatively affected by exposure to salt stress. This result is a consequence of the effects of salt accumulation in the soil, which reduces osmotic potential and limits the absorption of water by the plant, leading to stomatal closure (Figure 4A) and reduced transpiration (Figure 4B) (FRANZISKY et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Potassium fertilization as salt stress attenuator in sour passion fruit

et al. 2023

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Water scarcity associated with irregular rainfall in the semi-arid region of Northeastern Brazil stands out as a limiting factor for agricultural production. Thus, the use of waters with high concentration of salts is an alternative to expand irrigated agriculture in this region. In this context, this study evaluated the water status, intercellular electrolyte leakage, photosynthetic pigments, and gas exchange of ‘BRS SC1’ sour passion fruit as a function of irrigation with water of different levels of salinity and potassium doses. The experiment was carried out in pots adapted as drainage lysimeters under field conditions at the Experimental Farm of the Federal University of Campina Grande in São Domingos - PB, Brazil. The experimental design was randomized blocks, in a 5 × 4 factorial scheme, whose treatments were obtained by combining two factors: five levels of electrical conductivity of irrigation water - ECw (0.3, 1.1, 1.9, 2.7, and 3.5 dS m-1), associated with four potassium doses (60, 80, 100, and 120% of the recommendation), with three replicates. Water with electrical conductivity greater than 0.3 dS m-1 reduced the relative water content, chlorophyll a and chlorophyll b contents, CO2 assimilation rate, and instantaneous water use efficiency of ‘BRS SC1’ sour passion fruit plants. The estimated potassium dose of 85% of the recommendation (equivalent to 293 g per plant per year) mitigated the deleterious effects of salt stress on stomatal conductance, transpiration, internal CO2 concentration, and instantaneous carboxylation efficiency of passion fruit ‘BRS SC1’.

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“…In C4 plants, phosphoenolpyruvate carboxylase (PEPCase) is more sensitive to salt than Rubisco (Chiconato et al 2021). The partial or complete closure of stomata also aggravates the effects of salinity stress that limits CO2 availability (Franzisky et al 2021). The storage of carbohydrates is also hampered by salt stress as evident from the microscopic observations in Ulva prolifera.…”

Section: Characteristics Underlying Sensitivity Of Photosynthesis To ...mentioning

confidence: 99%

Photosynthetic machinery under salinity stress: Trepidations and adaptive mechanisms

Krishna¹,

Pandesha²,

Sathee³

et al. 2023

Photosynt.

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Chloroplasts and photosynthesis are the physiologically fateful arenas of salinity stress. Morphological and anatomical alterations in the leaf tissue, ultrastructural changes in the chloroplast, compromise in the integrity of the three-layered chloroplast membrane system, and defects in the light and dark reactions during the osmotic, ionic, and oxidative phases of salt stress are conversed in detail to bring the salinity-mediated physiological alterations in the chloroplast on to a single platform. Chloroplasts of salt-tolerant plants have evolved highly regulated salt-responsive pathways. Thylakoid membrane remodeling, ion homeostasis, osmoprotection, upregulation of chloroplast membrane and stromal proteins, chloroplast ROS scavenging, efficient retrograde signalling, and differential gene and metabolite abundance are the key attributes of optimal photosynthesis in tolerant species. This review throws light into the comparative mechanism of chloroplast and photosynthetic response to salinity in sensitive and tolerant plant species. Highlights• Photosynthesis is highly sensitive to salinity stress • An interplay of physiological and molecular determinants exists in the sensitivity of chloroplast to salinity stress • The major tolerance and adaptive mechanisms to salinity are chloroplast membrane remodeling, ion homeostasis, and retrograde signalling

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Acclimatisation of guard cell metabolism to long‐term salinity

Cited by 16 publications

References 87 publications

Under salt stress guard cells rewire ion transport and abscisic acid signaling

Under salt stress guard cells rewire ion transport and abscisic acid signaling

Potassium fertilization as salt stress attenuator in sour passion fruit

Photosynthetic machinery under salinity stress: Trepidations and adaptive mechanisms

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