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Phosphate uptake





The phosphate uptake mechanism - Springer

8/19/2014
02:24 | Author: Devin Garcia

Phosphate uptake
The phosphate uptake mechanism - Springer

Transfer of phosphate to the site of uptake into the root symplasm limits phosphate uptake in such soils. This transfer involves movement across.

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A membrane on the inner surface of the cell wall, the plasmalemma, separates the apoplasm from the symplasm. Transfer of phosphate to the site of uptake into the root symplasm limits phosphate uptake in such soils. Understanding of the mechanisms by which phosphate is transported across the plasmalemma into the plant symplasm has advanced considerably over the past 4 years due to the application of molecular techniques. Uptake of nutrients into the root symplasm occurs through transporter proteins embedded in this membrane.

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Functional biology of plant phosphate uptake at root and mycorrhiza

6/18/2014
12:08 | Author: Caitlin White

Phosphate uptake
Functional biology of plant phosphate uptake at root and mycorrhiza

Functional biology of plant phosphate uptake at root and mycorrhiza interfaces. Bucher M. Phosphorus (P) is an essential plant nutrient and one of the most.

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The physiological role of key cellular structures in plant P uptake and underlying molecular mechanisms are discussed in this review, with emphasis on phosphate transport across the cellular membrane at the root and arbuscular-mycorrhizal (AM) interfaces. Such approaches should assist in the breeding of crop plants that exhibit improved P acquisition efficiency and thus require lower inputs of P fertilizer for optimal growth. The control of P acquisition efficiency and its subsequent uptake and translocation in vascular plants is complex. Whether engineering of P transport systems can contribute to enhanced P uptake will be discussed. Genetic engineering holds the potential to modify the system in a targeted way at the root-soil or AM symbiotic interface. The tools of molecular genetics have facilitated novel approaches and provided one of the major driving forces in the investigation of the basic transport mechanisms underlying plant P nutrition. Phosphorus (P) is an essential plant nutrient and one of the most limiting in natural habitats as well as in agricultural production world-wide.

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Phosphorus Uptake by Plants From Soil to Cell - Plant Physiology

4/17/2014
02:12 | Author: Evan Martin

Phosphate uptake
Phosphorus Uptake by Plants From Soil to Cell - Plant Physiology

One putative phosphate transporter gene was expressed in tobacco cells (Mitsukawa et al., 1997). High-affinity Pi uptake was detected in the cells in which this.

In the cases of APT1 and APT2, the deduced amino acid sequences are 99% identical, which suggests that the proteins have the same functional characteristics. Some are strongly up-regulated by Pi starvation, whereas the expression of others is constitutive ( Leggewie et al., 1997 ). These multiple Pi-transporter genes are differentially expressed. Although these proteins are almost identical, the promoter regions are compley different and may contain specific information that controls the spatial expression of these genes in different cell types, such as epidermal or cortical cells in the roots.

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BMC Microbiology Full text Na-stimulated phosphate uptake

2/16/2014
04:36 | Author: Evan Martin

Phosphate uptake
BMC Microbiology Full text Na-stimulated phosphate uptake

Most living cells uptake phosphate, an indispensable nutrient for growth from their natural environment. In Synechocystis sp. PCC 6803, the.

It is well known that the growth of cyanobacteria relies both on the size of the pool of internal polyphosphate and on their ability to take up Pi from the natural environment with fluctuating Pi levels. PCC 7942 exhibits a lower K m for Pi uptake when grown under Pi-limiting conditions. For example, Synechococcus sp. In this study we determined the kinetics of each Pst system using deletion mutants of each system in Synechocystis 6803. PCC 6803 (hereafter Synechocystis 6803). In contrast, a low affinity Pit-like Pi transport system is thought to be absent in Synechocystis sp.

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Phosphorus - Soil Management

10/25/2014
04:20 | Author: Caitlin White

Phosphate uptake
Phosphorus - Soil Management

Forms of Phosphorus available for Plant Uptake Since phosphate is an anion, particles that generate an anion exchange capacity will form strong bonds with.

P-fixation is a term that is used to describe both P-sorption and P precipitation. Since both P-sorption and P precipitation reduce phosphorus availability, a soil with a great P-fixation capacity has less available phosphorus after fertilization than a soil with a low P-fixation capacity.

The solubility of phosphate minerals is very dependent upon soil pH.

Although phosphorus leaching is normally limited in most Hawaii soils due to their high P-fixing characteristics, phosphorus leaching can occur if the soil reaches maximum phosphorus holding capacity, especially when P fertilizers are overapplied.

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