scholarly journals The Role of a Potassium Transporter OsHAK5 in Potassium Acquisition and Transport from Roots to Shoots in Rice at Low Potassium Supply Levels

2014 ◽  
Vol 166 (2) ◽  
pp. 945-959 ◽  
Author(s):  
T. Yang ◽  
S. Zhang ◽  
Y. Hu ◽  
F. Wu ◽  
Q. Hu ◽  
...  
Keyword(s):  
Potassium Transporter ◽  
Low Potassium ◽  
Potassium Supply

scholarly journals Disruption of AtHAK/KT/KUP9 enhances plant cesium accumulation under low potassium supply

2020 ◽  
Author(s):  
Laure Genies ◽  
Ludovic Martin ◽  
Satomi Kanno ◽  
Serge Chiarenza ◽  
Loïc Carasco ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Primary Role ◽  
In Planta ◽  
Experimental Conditions ◽  
Low Potassium ◽  
Significant Impairment ◽  
Potassium Supply ◽  
Mutant Lines ◽  
Low K

ABSTRACTUnderstanding molecular mechanisms which underlie transport of cesium (Cs+) in plants is important to limit entry of its radioisotopes from contaminated area to the food chain. The potentially toxic element Cs+, which is not involved in any biological process, is chemically closed to the macronutrient potassium (K+). Among the multiple K+ carriers, the high-affinity K+ transporters family HAK/KT/KUP is thought to be relevant in mediating opportunistic Cs+ transport. On the 13 KUP identified in Arabidopsis thaliana, only HAK5, the major contributor to root K+ acquisition under low K+ supply, has been functionally demonstrated to be involved in Cs+ uptake in planta. In the present study, we showed that accumulation of Cs+ increased by up to 30% in two A. thaliana mutant lines lacking KUP9 and grown under low K+ supply. Since further experiments revealed that Cs+ release from contaminated plants to the external medium is proportionally lower in the two kup9 mutants, we proposed that KUP9 disruption could impair Cs+ efflux. By contrast, we did not measure significant impairment of K+ status in kup9 mutants suggesting that KUP9 disruption does not alter substantially K+ transport in experimental conditions used here. Putative primary role of KUP9 in plants is further discussed.

Role of potassium transporter KUP8 in plant responses to heavy metals

2021 ◽  
Author(s):  
María Sanz‐Fernández ◽  
Alejandro Rodríguez‐González ◽  
Luisa M. Sandalio ◽  
María C. Romero‐Puertas
Keyword(s):  
Heavy Metals ◽  
Plant Responses ◽  
Potassium Transporter

Rootstocks can enhance tomato growth and quality characteristics at low potassium supply

2013 ◽  
Vol 149 ◽  
pp. 70-79 ◽  
Author(s):  
Dietmar Schwarz ◽  
Gölgen Bahar Öztekin ◽  
Yüksel Tüzel ◽  
Bernhard Brückner ◽  
Angelika Krumbein
Keyword(s):  
Quality Characteristics ◽  
Low Potassium ◽  
Potassium Supply ◽  
Tomato Growth

Role of Potassium on Growth, Nitrogen Fixation and Biochemical Traits in [Vigna radiata (L.) Wilczek] under Water Stress

2020 ◽  
Author(s):  
Nisha Kataria ◽  
Narender Singh
Keyword(s):  
Nitrogen Fixation ◽  
Water Stress ◽  
Potassium Fertilizer ◽  
Biochemical Traits ◽  
Global Issue ◽  
Wide Range ◽  
Negative Effect ◽  
Potassium Supply ◽  
Effects Of Drought

Background: Water stress is a global issue to ensure survival of agricultural crops. Mungbean has a great nutritional value, short-duration and has an advantage that it can grow in wide range of soils and environments. For the present study, two varieties of mungbean were selected and raised in earthen pots. Methods: Water stress was imposed at 50% flowering (35-40 days after sowing) and plants were sampled at this stage. The control plants maintained at soil moisture content (SMC) of 12.0 ± 0.5% and in stressed plants, water stress was created by withholding irrigation till SMC decreased to 4.5±0.5%. In legumes, damaging effects of drought can be reduced by potassium supply. Potassium was supplied to the soil at concentration 0.00, 1.54 mM, 2.31 mM, 3.08 mM. Result: This article includes water stress-induced harmful effects on mungbean growth and development, nitrogen fixation and biochemical traits and suggests that different concentrations of potassium fertilizer help to reduce the negative effect of water stress.

Role of the spleen in congenital stomatocytosis associated with high sodium low potassium erythrocytes

1981 ◽  
Vol 59 (4) ◽  
pp. 173-179 ◽  
Author(s):  
W. Schr�ter ◽  
K. Ungefehr ◽  
W. Tillmann
Keyword(s):  
High Sodium ◽  
Low Potassium

scholarly journals Role of the autophagic-lysosomal system on low potassium-induced apoptosis in cultured cerebellar granule cells

2005 ◽  
Vol 92 (5) ◽  
pp. 1228-1242 ◽  
Author(s):  
Nadia Canu ◽  
Roberta Tufi ◽  
Anna Lucia Serafino ◽  
Giuseppina Amadoro ◽  
Maria Teresa Ciotti ◽  
...  
Keyword(s):  
Granule Cells ◽  
Cerebellar Granule Cells ◽  
Cerebellar Granule ◽  
Low Potassium ◽  
Lysosomal System ◽  
Induced Apoptosis

THE REQUIREMENTS AND ROLE OF POTASSIUM IN OVINE NUTRITION

1965 ◽  
Vol 45 (3) ◽  
pp. 147-156 ◽  
Author(s):  
L. D. Campbell ◽  
W. K. Roberts
Keyword(s):  
Body Weight ◽  
Serum Levels ◽  
Feeding Trial ◽  
Feedlot Performance ◽  
Lower Serum ◽  
High Dietary Level ◽  
Low Potassium ◽  
Calcium Magnesium ◽  
Balance Trials

The role of potassium in ovine nutrition was investigated by using 76 western range lambs in a 56-day feeding trial, a 56-day equalized feeding trial, and two 30-day balance trials. A semipurified ration (.046% potassium) was used and potassium was added as K2CO3. The level of potassium necessary to promote optimum feedlot performance was between 0.3 and 0.5% of the air-dry ration. A marked decrease in appetite was observed in lambs consuming a ration containing 0.1% potassium compared with one containing 0.5% potassium. Lambs receiving a ration containing 0.7% potassium gained significantly (P < 0.05) more body weight than lambs receiving a 0.3% potassium ration in the equalized feeding trial. Results of the balance studies suggested that the daily potassium maintenance requirement was less than 56.1 meq (63.6 mg/kg body weight). Low potassium intakes resulted in significantly (P < 0.05) lower serum levels of potassium and phosphorus with little change in serum sodium, calcium, magnesium, or chloride. Potassium depletion also resulted in a decrease in skeletal and heart muscle potassium and an increase in liver potassium. Apparent intestinal absorption of sodium was impaired by a relatively high dietary level of potassium (94.4 meq daily) while lower levels of potassium resulted in increased urinary sodium losses. Nitrogen balance was decreased when a low level of potassium (13.7 meq daily) was fed; however, potassium intake had no effect on apparent digestibilities of nitrogen, dry matter, or energy.

scholarly journals POTASSIUM-DEPENDENT SODIUM EXTRUSION BY CELLS OF PORPHYRA PERFORATA, A RED MARINE ALGA

1958 ◽  
Vol 42 (2) ◽  
pp. 281-288 ◽  
Author(s):  
Richard W. Eppley
Keyword(s):  
Marine Alga ◽  
Sea Water ◽  
High Sodium ◽  
Low Concentrations ◽  
Carrier Mechanism ◽  
Low Potassium ◽  
Sodium Extrusion ◽  
Rubidium Accumulation ◽  
Red Marine Alga

Potassium-free artificial sea water causes a loss of cell potassium and a gain of cell sodium in Porphyra perforata, which is not attributable to an inhibition of respiration. On adding KCl or RbCl to such low potassium, high sodium tissues, net accumulation of potassium or rubidium takes place, accompanied by net extrusion of sodium. Rates of potassium or rubidium accumulation and sodium extrusion are proportional to the amount of KCl or RbCl added only at low concentrations. Saturation of rates is evident at KCl or RbCl concentrations above 20–30 mM, suggesting the role of an ion carrier mechanism of transport. Evidence for and against mutually dependent sodium extrusion and potassium or rubidium accumulation is discussed.

Sign in / Sign up

Export Citation Format

Share Document