potassium deficiency/vairenis

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Regulation of Arabidopsis thaliana (L.) Heynh Arginine decarboxylase by potassium deficiency stress.

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Arginine decarboxylase (ARGdc) is the first enzyme in one of the two pathways to putrescine in plants. ARGdc enzyme activity has been shown to be induced by many environmental factors, including potassium deficiency stress. We investigated the mechanism for induction of ARGdc activity during

OsPRX2 contributes to stomatal closure and improves potassium deficiency tolerance in rice.

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Peroxiredoxins (Prxs) which are thiol-based peroxidases have been implicated in the toxic reduction and intracellular concentration regulation of hydrogen peroxide. In Arabidopsis thaliana At2-CysPrxB (At5g06290) has been demonstrated to be essential in maintaining the water-water cycle for proper

[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

Zinc finger protein 5 (ZFP5) associates with ethylene signaling to regulate the phosphate and potassium deficiency-induced root hair development in Arabidopsis.

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Zinc finger protein transcription factor ZFP5 positively regulates root hair elongation in response to Pi and potassium deficiency by mainly activating the expression of EIN2 in Arabidopsis. Phosphate (Pi) and potassium (K⁺) are major plant nutrients required for plant growth and

Potassium deficiency induces the biosynthesis of oxylipins and glucosinolates in Arabidopsis thaliana.

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BACKGROUND Mineral fertilization and pest control are essential and costly requirements for modern crop production. The two measures go hand in hand because plant mineral status affects plant susceptibility to pests and vice versa. Nutrient deficiency triggers specific responses in plants that

The Cotton High-Affinity K+ Transporter, GhHAK5a, Is Essential for Shoot Regulation of K+ Uptake in Root under Potassium Deficiency.

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Potassium (K) deficiency is a key limiting factor in cotton (Gossypium hirsutum) production. By grafting two contrasting cotton cultivars, CCRI41 (more susceptible to K+ deficiency) and SCRC22 (more tolerant of K+ deficiency), we established that cotton shoot plays a vital role in the regulation of

System analysis of metabolism and the transcriptome in Arabidopsis thaliana roots reveals differential co-regulation upon iron, sulfur and potassium deficiency.

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Deprivation of mineral nutrients causes significant retardation of plant growth. This retardation is associated with nutrient-specific and general stress-induced transcriptional responses. In this study, we adjusted the external supply of iron, potassium and sulfur to cause the same retardation of

Reactive oxygen species and root hairs in Arabidopsis root response to nitrogen, phosphorus and potassium deficiency.

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Plant root sensing and adaptation to changes in the nutrient status of soils is vital for long-term productivity and growth. Reactive oxygen species (ROS) have been shown to play a role in root response to potassium deprivation. To determine the role of ROS in plant response to nitrogen and

Regulatory roles of cytokinins and cytokinin signaling in response to potassium deficiency in Arabidopsis.

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Potassium (K) is an important plant macronutrient that has various functions throughout the whole plant over its entire life span. Cytokinins (CKs) are known to regulate macronutrient homeostasis by controlling the expression of nitrate, phosphate and sulfate transporters. Although several studies

A peroxidase contributes to ROS production during Arabidopsis root response to potassium deficiency.

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Reactive oxygen species (ROS) play an important role in root responses to potassium deprivation by regulating the expression of the high-affinity K(+) transporter gene AtHAK5 and other genes. Activation-tagged lines of Arabidopsis plants containing the AtHAK5 promoter driving luciferase were

Metabolomic analysis of Arabidopsis reveals hemiterpenoid glycosides as products of a nitrate ion-regulated, carbon flux overflow.

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An understanding of the balance between carbon and nitrogen assimilation in plants is key to future bioengineering for a range of applications. Metabolomic analysis of the model plant, Arabidopsis thaliana, using combined NMR-MS revealed the presence of two hemiterpenoid glycosides that accumulated

Contribution of KUPs to potassium and cesium accumulation appears complementary in Arabidopsis.

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Cesium has no known beneficial effects on plants and while plants have the ability to absorb it through the root system, plant growth is retarded at high concentrations. Recently, we have shown that potassium influx through a potassium channel complex AKT1-KC1 is inhibited by cesium in Arabidopsis

Glutathione and Its Biosynthetic Intermediates Alleviate Cesium Stress in Arabidopsis.

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Phytoremediation is optimized when plants grow vigorously while accumulating the contaminant of interest. Here we show that sulphur supply alleviates aerial chlorosis and growth retardation caused by cesium stress without reducing cesium accumulation in Arabidopsis thaliana. This alleviation

Regulated expression of Arabidopsis shaker K+ channel genes involved in K+ uptake and distribution in the plant.

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Potassium is the most abundant cation in the cytosol, where it plays a role in basal functions. Rapid uptake and distribution of K+ is therefore required for plant growth. Three members of the so-called Shaker K+ channel gene family (nine genes identified in Arabidopsis) play a role in these

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