Going beyond nutrition: Regulation of potassium homoeostasis as a common denominator of plant adaptive responses to environment

Anschütz, Uta; Becker, Dirk; Shabala, Sergey

doi:10.1016/j.jplph.2014.01.009

Cited by 385 publications

(256 citation statements)

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“…The retention of stable K + concentrations in the cytosol is required to balance the toxic effects of Na + accumulation (Anschütz et al, 2014;Shabala and Pottosin, 2014). We demonstrate that the higher salt sensitivity of the root apex was not related to higher Na + accumulation in root tissues but rather originated from the compromised capacity for K + retention in the root apex.…”

Section: Discussionmentioning

confidence: 77%

“…3B), as NaCl-induced K + efflux in plant roots is mediated mainly by GORK channels that display very strong voltage dependence and are activated by membrane depolarization ( Fig. 8; Anschütz et al, 2014).…”

Section: Discussionmentioning

confidence: 97%

“…This resting potential is set by the PM H + -ATPase and is normally kept close to the equilibrium potential for K + (Hirsch et al, 1998). Under salinity, the membrane depolarizes following the influx of positively charged Na + ions, which shifts membrane potential values above the equilibrium potential for K + and results in significant outward K + currents (Anschütz et al, 2014;Véry et al, 2014). This shift also implies that K + uptake may occur via active transport only.…”

Section: Intrinsically Higher H + -Atpase Activity Is Essential To Comentioning

confidence: 99%

“…High cytosolic Na + concentrations are considered to be toxic for cell metabolism and, thus, are reduced by various means (Tester and Davenport, 2003;Ji et al, 2013;Flowers et al, 2015). At the same time, superior K + retention and a cell's ability to maintain cytosolic K + homeostasis correlate with salinity tolerance in a broad range of plant species (Anschütz et al, 2014;Shabala and Pottosin, 2014) and are essential for preventing salinityinduced programmed cell death (Shabala, 2009;Demidchik et al, 2010). High cytosolic K + levels also are essential to maintain high vacuolar H + -PPase activity, thus enabling the operation of tonoplast NHX proteins that mediate vacuolar Na + sequestration (Shabala, 2013).…”

mentioning

confidence: 99%

“…In addition, ROS detoxification activity in plant cells is critically dependent on K + availability (Sun et al, 2015). This explains why the cytosolic sodium-potassium ratio is widely regarded a major determinant of plant salinity stress tolerance (Anschütz et al, 2014;Shabala and Pottosin, 2014) and why understanding the tissue specificity of its regulation may be the key to improving salinity tolerance in plants.…”

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confidence: 99%

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Cell-Type-Specific H⁺-ATPase Activity in Root Tissues Enables K⁺ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress

et al. 2016

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While the importance of cell type specificity in plant adaptive responses is widely accepted, only a limited number of studies have addressed this issue at the functional level. We have combined electrophysiological, imaging, and biochemical techniques to reveal the physiological mechanisms conferring higher sensitivity of apical root cells to salinity in barley (Hordeum vulgare). We show that salinity application to the root apex arrests root growth in a highly tissue-and treatment-specific manner. Although salinity-induced transient net Na + uptake was about 4-fold higher in the root apex compared with the mature zone, mature root cells accumulated more cytosolic and vacuolar Na + , suggesting that the higher sensitivity of apical cells to salt is not related to either enhanced Na + exclusion or sequestration inside the root. Rather, the above differential sensitivity between the two zones originates from a 10-fold difference in K + efflux between the mature zone and the apical region (much poorer in the root apex) of the root. Major factors contributing to this poor K + retention ability are (1) an intrinsically lower H + -ATPase activity in the root apex, (2) greater saltinduced membrane depolarization, and (3) a higher reactive oxygen species production under NaCl and a larger density of reactive oxygen species-activated cation currents in the apex. Salinity treatment increased (2-to 5-fold) the content of 10 (out of 25 detected) amino acids in the root apex but not in the mature zone and changed the organic acid and sugar contents. The causal link between the observed changes in the root metabolic profile and the regulation of transporter activity is discussed.

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Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 97%

Section: Intrinsically Higher H + -Atpase Activity Is Essential To Comentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Cell-Type-Specific H⁺-ATPase Activity in Root Tissues Enables K⁺ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress

et al. 2016

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Role of Calcium and Potassium in Amelioration of Environmental Stress in Plants

Pathak

Ahmed

Kumari

et al. 2020

Protective Chemical Agents in the Amelioration of Plant Abiotic Stress

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Nitrogen management enhanced plant growth, antioxidant ability, and grain yield of rice under salinity stress

Zhu

Shi

et al. 2020

Agronomy Journal

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Salinity is a major abiotic stress limiting crop growth and reducing grain yield. In recent years, little progress was made in salt‐tolerant cultivation techniques. Therefore, a controlled experiment was conducted to study the effects of nitrogen management (NM) on growth, antioxidant ability, and yield performance of salt‐tolerant rice (Oryza sativa L.) under salinity stress. Three salinity levels (0‰ as control; 0.75‰, 4.3 dS m−1; and 1.5‰, 7.7 dS m−1) and four levels of NM (tillering fertilizer/panicle initiation fertilizer = 7:3, 6:4, 5:5, and 4:6) were arranged in this study. Under salinity stress, plant height, tiller number, fresh weight, grain yield, panicle, spikelets per panicle, grain weight, and soluble sugar content in stem were significantly decreased. In contrast, antioxidant parameters of superoxide dismutase, peroxidase, and catalase were significantly increased. Grain filling percentage and sucrose content were slightly changed. Compared to the control, grain yield was reduced by 45.6%, 34.8%, 60.4%, and 46.7% at the ratio of 7:3, 6:4, 5:5, and 4:6 NM at 0.75‰ salinity level, and 73.5%, 59.7%, 74.8%, and 61.7% at 1.5‰ salinity level, respectively. The highest yield was generated by 6:4 NM at both the 0.75‰ and 1.5‰ salinity level, and the lowest by 4:6 and 5:5. However, NM could obviously alleviate the inhibition effects of salinity stress and improve antioxidant ability of rice. Among them, 6:4 NM performed the best alleviation effects, followed by 7:3 and 5:5 NM. This study suggests that the appropriate NM can effectively alleviate salinity stress and increase grain yield.

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Going beyond nutrition: Regulation of potassium homoeostasis as a common denominator of plant adaptive responses to environment

Cited by 385 publications

References 270 publications

Cell-Type-Specific H⁺-ATPase Activity in Root Tissues Enables K⁺ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress

Cell-Type-Specific H⁺-ATPase Activity in Root Tissues Enables K⁺ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress

Role of Calcium and Potassium in Amelioration of Environmental Stress in Plants

Nitrogen management enhanced plant growth, antioxidant ability, and grain yield of rice under salinity stress

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Going beyond nutrition: Regulation of potassium homoeostasis as a common denominator of plant adaptive responses to environment

Cited by 385 publications

References 270 publications

Cell-Type-Specific H+-ATPase Activity in Root Tissues Enables K+ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress

Cell-Type-Specific H+-ATPase Activity in Root Tissues Enables K+ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress

Role of Calcium and Potassium in Amelioration of Environmental Stress in Plants

Nitrogen management enhanced plant growth, antioxidant ability, and grain yield of rice under salinity stress

Contact Info

Product

Resources

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Cell-Type-Specific H⁺-ATPase Activity in Root Tissues Enables K⁺ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress

Cell-Type-Specific H⁺-ATPase Activity in Root Tissues Enables K⁺ Retention and Mediates Acclimation of Barley (Hordeum vulgare) to Salinity Stress