potassium deficiency/بوتاسيوم

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Potassium deficiency affects water status and photosynthetic rate of the vegetative sink in green house tomato prior to its effects on source activity.

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The potassium requirement of green house tomatoes is very high for vegetative growth and fruit production. Potassium deficiency in plants takes long time for expression of visible symptoms. The objective of this study is to detect the deficiency early during the vegetative growth and define the

Effects of Ascophyllum nodosum seaweed extracts on lettuce growth, physiology and fresh-cut salad storage under potassium deficiency.

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BACKGROUND Potassium (K) deficiency in leafy vegetables such as lettuce is a major concern regarding quality. Seaweed (SW) extracts, as biostimulants, are biodegradable materials and have become increasingly popular as they are reported to enhance crop growth and yield. RESULTS In order to overcome

A novel potassium deficiency-induced stimulon in Anabaena torulosa.

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Potassium deficiency enhanced the synthesis of fifteen proteins in the nitrogen-fixing cyanobacterium Anabaena torulosa and of nine proteins in Escherichia coli. These were termed potassium deficiency-induced proteins or PDPs and constitute hitherto unknown potassium deficiency-induced stimulons.

[The structure and phosphorus or potassium deficiency induced expression of a calmodulin-like protein gene in Arabidopsis].

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According to our previous microarray analysis, we found a putative calmodulin gene related to Pi deficiency and designated AtPsiCaM (Arabidopsis Pi-starvation-induced CaM). Results of structural analysis indicate that AtPsiCaM has three conserved EF-hands motif and belongs to calmodulin-like

Differences on photosynthetic limitations between leaf margins and leaf centers under potassium deficiency for Brassica napus L.

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Analyzing the proportions of stomatal (SL), mesophyll conductance (MCL) and biochemical limitations (BL) imposed by potassium (K) deficit, and evaluating their relationships to leaf K status will be helpful to understand the mechanism underlying the inhibition of K deficiency on photosynthesis (A).

Opposite effect of protein synthesis inhibitors on potassium deficiency-induced apoptotic cell death in immature and mature neuronal cultures.

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Typically, primary cultures of rat cerebellar granule neurons are grown in the presence of 25 mM KCl and are considered to mature by approximately 7 days in vitro. Potassium deficiency was created by growing the neurons from days 1 to 4 in the presence of 12.5 mM KCl (immature cultures) or by

Effects of potassium deficiency on growth and protein synthesis in skeletal muscle and the heart of rats.

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The effects of potassium deficiency on growth, K content and protein synthesis have been compared in 4-13-week-old rats. When maintained on K-deficient fodder (1 mmol/kg) rats ceased to grow within a few days, and the incorporation of [3H]leucine into skeletal muscle protein in vivo was reduced by

Potassium deficiency triggers the development of dormant cells (akinetes) in Aphanizomenon ovalisporum (Nostocales, Cyanoprokaryota)(1).

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Akinetes are spore-like nonmotile cells that differentiate from vegetative cells of filamentous cyanobacteria from the order Nostocales. They play a key role in the survival and distribution of these species and contribute to their perennial blooms. Various environmental factors were reported to

Natural history of potassium-deficiency myopathy in the dog: role of adrenocorticosteroid in rhabdomyolysis.

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Potassium deficiency occurs in several conditions and is reported to cause muscle weakness and rhabdomyolysis. The mechanisms by which potassium deficiency cause muscle disease remain unknown, but the primary purpose of the present study was to determine whether abnormal muscle glycogen metabolism

Physiological and quantitative proteomic analyses unraveling potassium deficiency stress response in alligator weed (Alternanthera philoxeroides L.) root.

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UNASSIGNED Physiological and iTRAQ based proteomic analysis provided new insights into potassium deficiency stress response in alligator weed root. Alligator weed (Alternanthera philoxeroides) has a strong ability to adapt to potassium deficiency (LK) stress. Proteomic changes in response to this

Effects of low sink demand on leaf photosynthesis under potassium deficiency.

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The interaction between low sink demand and potassium (K) deficiency in leaf photosynthesis was not intensively investigated, therefore this interaction was investigated in winter oilseed rape (Brassica napus L.). Plants subjected to sufficient (+K) or insufficient (-K) K supply treatments were

[Effect of nitrogen, phosphorus and potassium deficiency on content of phenolic compounds in exudation of American ginseng].

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OBJECTIVE Some of the phenolic compounds detected in the soil of commercially cultivated American ginseng could inhibit the seed germination and seedling growth of American ginseng. In this paper we studied the root exudation of American ginseng induced by deficiency of nitrogen, phosphorus and

Influence of glycosides on myocardial potassium and sodium concentration in acute and chronic potassium deficiency.

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The analytical assay of intracellular potassium ([Ki]) and sodium ([Nai]) concentration of guinea pig papillary muscle measured in in vitro experiments shows that: 1) 5 X 10(-7) M g-strophanthin causes a decrease of [Ki] under control conditions, in acute as well as in chronic potassium deficiency,

Effects of potassium deficiency on potassium, polyamines and amino acids in mouse tissues.

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Sexual dimorphism in potassium content was found in plasma, kidney, heart and skeletal muscle of CD1 mice. We observed that feeding mice with a K(+)-deficient diet had an uneven and gender-dependent effect on organ weight and tissue potassium concentrations. Treatment produced a marked decrease in

Potassium deficiency in marmots during hibernation.

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Semiquantitation of potassium deficiency in the renal papillae indicates that woodchucks (Marmota monax) are deficient in potassium annually during the time they subsist on stored fats. The deficiency begins prior to hibernation, progresses during hibernation, and, in males, continues during the

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