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KT/HAK/KUP potassium transporters gene family and their whole-life cycle expression profile in rice (Oryza sativa).

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KT/HAK/KUP potassium transporter protein-encoding genes constitute a large family in the plant kingdom. The KT/HAK/KUP family is important for various physiological processes of plant life. In this study, we identified 27 potential KT/HAK/KUP family genes in rice (Oryza sativa) by database

Salinity stress-tolerant and -sensitive rice (Oryza sativa L.) regulate AKT1-type potassium channel transcripts differently.

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In the indica rice (Oryza sativa L.) a cDNA was characterized that encoded OsAKT1 homologous to inward-rectifying potassium channels of the AKT/KAT subfamily. Transcript analysis located OsAKT1 predominantly in roots with low abundance in leaves. Cell-specificity of OsAKT expression was analyzed by

Rubidium chloride tolerant callus cultures of rice (Oryza sativa L.) accumulate more potassium and cross tolerate to other salts.

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Callus cultures from salt tolerant (CSR-10) and susceptible (Swarnadhan) varieties of Oryza sativa L. were established in Murashige and Skoog's (MS) medium containing lethal concentrations (50 mM) of rubidium chloride (RbCl) as a selective agent. While 95-100% cells were viable in callus cultures

Synergistic Effects of Nitrogen and Potassium on Quantitative Limitations to Photosynthesis in Rice ( Oryza sativa L.).

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The inhibition of the net CO2 assimilation ( A) during photosynthesis is one of the major physiological effects of both nitrogen (N) and potassium (K) deficiencies on rice growth. Whether the reduction in A arises from a limitation in either the diffusion and biochemical fixation of CO2 or

Characteristics of photosynthesis and functions of the water-water cycle in rice (Oryza sativa) leaves in response to potassium deficiency.

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The mechanisms of photoprotection of photosynthesis and dissipation of excitation energy in rice leaves in response to potassium (K) deficiency were investigated. Net photosynthetic rate and the activity of ribulose-1,5-bisphosphate carboxylase/oxygenase decreased under K deficiency. Compared with

Response of rice (Oryza Sativa L.) cooking quality properties to nitrogen and potassium application.

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In order to consider effects of various levels of nitrogen and potassium application on cooking quality traits of rice cultivars, an experiment was conducted in 2004 and 2005 using Tarrom (a local Iranian landrace) and Neda (an Iranian improved cultivar). In this experiment four levels of nitrogen

Effects of nitrogen and potassium fertilizers on rice (Oryza Sativa L.) genotypes processing characteristics.

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In order to consider effects of various levels of nitrogen and potassium application on kernel processing characteristics of rice cultivars, an experiment was developed in 2004 and 2005 using Tarrom (a local Iranian landrace) and Neda (an Iranian improved cultivar). In this experiment four levels of

Molecular evolution and functional divergence of HAK potassium transporter gene family in rice (Oryza sativa L.).

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The high-affinity K(+) (HAK) transporter gene family is the largest family in plant that functions as potassium transporter and is important for various aspects of plant life. In the present study, we identified 27 members of this family in rice genome. The phylogenetic tree divided the land plant

Characterization of rice KT/HAK/KUP potassium transporters and K+ uptake by HAK1 from Oryza sativa.

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Plant high-affinity K⁺ (HAK) transporters are divided into four major clusters. Cluster I transporters, in particular, are thought to have high-affinity for K⁺. Of the 27 HAK genes in rice, eight HAK transporters belong to cluster I. In this study, we investigated the

Effect of certain chemical fertilizers on the rhizosphrere mycoflora of Oryza sativa Linn. II. Potassium fertilizer (potassium sulphate).

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Optimization of ammonium acquisition and metabolism by potassium in rice (Oryza sativa L. cv. IR-72).

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ABSTRACT We present the first characterization of K(+) optimization of N uptake and metabolism in an NH(4)(+)-tolerant species, tropical lowland rice (cv. IR-72). (13)N radiotracing showed that increased K(+) supply reduces futile NH(4)(+) cycling at the plasma membrane, diminishing the excessive

Establishing grading indices of available soil potassium on paddy soils in Hubei province, China.

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Soil testing is an important diagnostic tool for assessing crop-available soil potassium (K) and hence making appropriate fertilizer recommendation. This study was aimed at correlating grain yield response data to soil-test K extracted with ammonium acetate (NH4OAc), cold nitric acid (HNO3), sodium

Potassium transport systems in the moss Physcomitrella patens: pphak1 plants reveal the complexity of potassium uptake.

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Potassium uptake is one of the most basic processes of plant physiology. However, a comprehensive description is lacking. At a cellular level fungi have provided a helpful but imperfect plant model, which we aim to improve using Physcomitrella patens. Blast searches in expressed sequence tag

Nonosmotic Effects of Polyethylene Glycols upon Sodium Transport and Sodium-Potassium Selectivity by Rice Roots.

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Addition of polyethylene glycol (PEG) as an osmotic agent (at -230 kilopascals) dramatically lessened the toxicity of NaCl (at 50 moles per cubic meter) to rice (Oryza sativa L.) seedlings. This was explained by a reduction in the uptake of NaCl. This reduction was much greater than could be

Response of rice cultivars to rates of nitrogen and potassium application in field and pot conditions.

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Nitrogen and potassium are the yield-limiting nutrients in rice production regions of Iran. Use of N and K efficient cultivars is an important complementary strategy in improving rice yield, increasing the quality properties of rice grains and reducing cost of production. In order to consider the

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