Potassium and Potassium-Permeable Channels in Plant Salt Tolerance

Shabala, Sergey; Pottosin, Igor

doi:10.1007/978-3-642-10494-7_5

Cited by 44 publications

(32 citation statements)

References 147 publications

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“…Unlike Na, K is an essential nutrient that is metabolized right away following absorption. The concentration of K in the cytoplasm has consistently been found in the range between 100 and 200 mM [9]. In plants, Na ions has the potential to replace K in some of its functions and it was reported that in some plants, supplementation of Na in reduced amounts can eliminate K deficiency symptoms under limited K supply [43].…”

Section: Discussionmentioning

confidence: 99%

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Response of Alfalfa under Salt Stress to the Application of Potassium Sulfate Nanoparticles

El-Sharkawy¹,

El-Beshsbeshy²,

Mahmoud³

et al. 2017

AJPS

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A greenhouse study was conducted to explore the effect of various rates of potassium sulfate (K 2 SO 4 ) nanoparticles on alfalfa (Medicago sativa L.) growth and physiological response under salt stress. One salt-tolerant genotype (Mesa-Sirsa) and one salt-sensitive genotype (Bulldog 505) were selected based on germination under salt and were planted in pots containing 2 kg of sand. The two genotypes were subjected to 0 and 6 dS•m −1 salt levels using CaCl 2 •2H 2 O: NaCl (2:1) mixed with Hoagland solution. Three K 2 SO 4 nanoparticle treatments consisting of, 1/4, 1/8, and 1/10 of the potassium (K) level in full strength Hoagland solution (235 mg•L −1 ) were applied. Adding K 2 SO 4 nanoparticles at the 1/8 level resulted in the highest shoot dry weight, relative yield, root length and root dry weight in both genotypes. The different rates of K 2 SO 4 nanoparticles affected significantly Na/K ratio and the concentrations of Calcium (Ca), Phosphorus (P), Copper (Cu), Manganese (Mn), and Zinc (Zn) in plant tissue. The application of K 2 SO 4 nanoparticles at the 1/8 rate enhanced the plant's physiological response to salt stress by reducing electrolyte leakage, increasing catalase and proline content, and increasing antioxidant enzymes, activity. These results suggest that the application of K nanoparticles may have better efficiency than conventional K fertilizers in providing adequate plant nutrition and overcoming the negative effects of salt stress in alfalfa.

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Section: Discussionmentioning

confidence: 99%

“…Potassium (K) is an essential nutrient and is also the most abundant cation in plants [9]. Potassium plays a critical role in plant growth and metabolism, and it contributes significantly to the survival of plants under various biotic and abiotic stresses.…”

mentioning

confidence: 99%

Response of Alfalfa under Salt Stress to the Application of Potassium Sulfate Nanoparticles

El-Sharkawy¹,

El-Beshsbeshy²,

Mahmoud³

et al. 2017

AJPS

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“…The addition of K + to a saline culture solution has been found to increase K + concentrations in plant tissue that corresponds with a decrease in Na + content, with a further increase in plant growth and salt tolerance. Increased evidence shows that it is not the absolute quantity of Na + per se that influences salt resistance, but rather the cytosolic K + /Na + ratio that determines plant salt tolerance [11,78]. Figure 3 summarizes the role of K in plants living under salt stress.…”

Section: The Role Of Potassium In Abiotic Stress Resistancementioning

confidence: 99%

“…The concentration of K + in the cytoplasm has consistently been found to be between 100 and 200 mM [11], and apoplastic K + concentration may vary between 10 and 200 or even reach up to 500 mM [12]. K plays essential roles in enzyme activation, protein synthesis, photosynthesis, osmoregulation, stomatal movement, energy transfer, phloem transport, cation-anion balance and stress resistance [4].…”

Section: Introductionmentioning

confidence: 99%

The Critical Role of Potassium in Plant Stress Response

Wang

Zheng

Shen

et al. 2013

IJMS

1,341

829

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Agricultural production continues to be constrained by a number of biotic and abiotic factors that can reduce crop yield quantity and quality. Potassium (K) is an essential nutrient that affects most of the biochemical and physiological processes that influence plant growth and metabolism. It also contributes to the survival of plants exposed to various biotic and abiotic stresses. The following review focuses on the emerging role of K in defending against a number of biotic and abiotic stresses, including diseases, pests, drought, salinity, cold and frost and waterlogging. The availability of K and its effects on plant growth, anatomy, morphology and plant metabolism are discussed. The physiological and molecular mechanisms of K function in plant stress resistance are reviewed. This article also evaluates the potential for improving plant stress resistance by modifying K fertilizer inputs and highlights the future needs for research about the role of K in agriculture.

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“…K is an essential nutrient and is also the most abundant cation in plants. The concentration of K + in the cytoplasm has consistently been found to be between 100 and 200 mM (Shabala and Pottosin, 2010), and apoplastic K + concentration may vary between 10 and 200 or even reach up to 500 mM (White and Karley, 2010). K plays essential roles in enzyme activation, protein synthesis, photosynthesis, osmoregulation, stomatal movement, energy transfer, phloem transport, cation-anion balance and stress resistance ( Marschner, 2012).…”

Section: Introductionmentioning

confidence: 99%

Effect of water stress on leaf nutrient status and frequency of irrigation in various cultivars of kiwifruit

Pratima

Sharma

Belsare

2018

JANS

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Abstract:The five cultivars of kiwifruit viz., Allison, Hayward, Abbott, Monty and Bruno during the years 2011 and 2012 in the Department of Fruit Science, Dr. Y. S. Parmar University of Horticulture and Forestry, Solan, Himachal Pradesh, India. Two irrigation treatments i.e. standard irrigation (at 80% field capacity) and deficit irrigation (at 60 % F C) were applied to these cultivars from March to October with three replications in Randomized Block Design (RBD). The leaf nutrient content (%) and frequency of irrigation (irrigation interval in days) were investigated in kiwifruit in response to these irrigation treatments. The leaf nitrogen (N), phosphorus (P), Potassium (K), Calcium (Ca) and Magnesium (Mg) contents varied with cultivars under two irrigation regimes. The leaf N content and Ca content (%) was observed highest in cultivar Monty; P content in Allison; K content in Hayward; Mg content (%) in Abbott and Monty under standard irrigation treatment. These nutrient contents reduced significantly at 0.05 % level of significance with deficit irrigation treatment in different cultivars. The % reduction in these nutrients with deficit irrigation treatment was found to be highest in cultivar Hayward and the least in Bruno. The total number of irrigation applied under standard and deficit irrigation were 16 and 10 respectively, during both the years. The response of Bruno cultivar in terms of leaf nutrient content under water deficit condition is much better in comparison to all other cultivars. Bruno is considered to be drought tolerant cultivar and Hayward to be drought sensitive. Thus, the Bruno cultivar should be preferred for cultivation in water scarce regions.

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Potassium and Potassium-Permeable Channels in Plant Salt Tolerance

Cited by 44 publications

References 147 publications

Response of Alfalfa under Salt Stress to the Application of Potassium Sulfate Nanoparticles

Response of Alfalfa under Salt Stress to the Application of Potassium Sulfate Nanoparticles

The Critical Role of Potassium in Plant Stress Response

Effect of water stress on leaf nutrient status and frequency of irrigation in various cultivars of kiwifruit

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