Phosphate Pools, Phosphate Transport, and Phosphate Availability

Bieleski, R. L.

doi:10.1146/annurev.pp.24.060173.001301

Cited by 1,005 publications

(604 citation statements)

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“…Vol. 57, 1976 Leaves 8,9,10, and 11 on the main axis (the 14th was the flag leaf) were harvested at 1300 hr on the 76th day, after 5 hr of exposure to bright sunlight. The salt treatment, which had been in full effect for 52 days, did not affect the number of leaves on the main axis.…”

Section: Materials and Methods Plant Culture Corn Plants (Zea Mays Lmentioning

confidence: 99%

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Interactive Effects of Salinity and Phosphorus Nutrition of the Concentrations of Phosphate and Phosphate Esters in Mature Photosynthesizing Corn Leaves

Nieman¹,

Clark²

1976

Plant Physiol.

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The effects of salinity on corn plants (Zea mays L.) are influenced by the concentration of nutrient orthophosphate. Salinity (-2 bars each of NaCI and CaCI2) was more injurious in combination with a high concentration of orthophosphate (2 mM) (that gave optimum yields in the absence of salinity) than it was with a lower concentration (0.1 mM). With 2 mm orthophosphate, salinity seemed to damage the plant mechanisms that normally regulate the internal concentration of orthophosphate resulting in excessive accumulation and P toxicity. On the other hand, with 0.1 mM orthophosphate, salinity decreased orthophosphate concentration in mature leaves. This effect was paralleled by decreases in the concentration of adenosine 5'-triphosphate and in the energy charge of the adenylate system, indicating an orthophosphate deficit. Even so, plants survived salinity better under these conditions than in the presence of 2 mM orthophosphate. The data indicated that salinity affected the phosphorylated state of the adenine nucleotides only indirectly through its effect on the concentration of orthophosphate in the cells. Salinity, especially in the presence of 2 mM orthophosphate, resulted in an increase in the concentrations of sugar phosphates in mature photosynthesizing leaves, suggesting that translocation rather than photosynthesis was a limiting process. Decreased translocation could be a secondary effect of decreased growth. However, a decreased translocation rate could cause decreased growth by limiting the supply of essential metabolites reaching growing tissues.The recent salinity-fertility studies of Bernstein et al. (7) showed a marked interactive effect of salinity and nutrient Pi on corn plants. Salinity was more deleterious in combination with a high concentration of Pi (2 mM) than with a low concentration (0.05 mM). There occurred a greater reduction in yield and a characteristic leaf injury. The injury seemed to be a result of excessive accumulation of P; other ions did not accumulate sufficiently to account for it. Also, the injury signs were similar to those caused by P toxicity in wheat (8) and barley ( 15). These observations suggested that salinity affected the uptake and utilization of Pi by the plants. Considering the central role of P in cell metabolism, evidence of salt-induced changes in P metabolism might also provide insight regarding the mechanism of salt injury to plants. The work reported here was concerned with the effects of salinity in combination with low and high concentrations of nutrient Pi on the concentrations of Pi and of Pesters2 in mature photosynthesizing corn leaves. Preliminary ' This paper is dedicated to a fellow plant physiologist and friend.Leon Bernstein.2 Abbreviations: F6P: fructose 6-phosphate; FDP: fructose 1 6-diwork showed that salinity, like extremes in P nutrition (9), affected the concentrations of these compounds much more than it did the concentrations of lipid P and nucleic acid P. MATERIALS AND METHODS Plant Culture. Corn plants (Zea mays L. T-strain Golden...

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Section: Materials and Methods Plant Culture Corn Plants (Zea Mays Lmentioning

confidence: 99%

“…2 Abbreviations: F6P: fructose 6-phosphate; FDP: fructose 1 6-diwork showed that salinity, like extremes in P nutrition (9), affected the concentrations of these compounds much more than it did the concentrations of lipid P and nucleic acid P.…”

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confidence: 99%

Interactive Effects of Salinity and Phosphorus Nutrition of the Concentrations of Phosphate and Phosphate Esters in Mature Photosynthesizing Corn Leaves

Nieman¹,

Clark²

1976

Plant Physiol.

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“…constituent of proteins and it determines the photosynthetic capacity (Güsewell, 2004), as up to 75% of N would be involved in photosynthetic processes (Evans, 1989). Although P is an important structural element in nucleic acids that regulate energy storage and transfer (Wang et al, 2013) and photosynthesis requires orthophosphate as a substrate (Sivak and Walker, 1986), the pool of phosphorus involved in photosynthesis is variable and often small (Bieleski, 1973). Thus, an efficient use of N and P is believed to contribute to plant fitness (Aerts and Chapin, 2000) and is thought to influence the nutrient cycling and productivity of terrestrial ecosystems (Vitousek, 2004).…”

Section: Photosynthesis and Photosynthetic Element Use Efficiency Ofmentioning

confidence: 99%

Effects of nitrogen and phosphorus supply on growth and physiological traits of two Larix species

Guo

Zhang

et al. 2016

Environmental and Experimental Botany

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“…P is a nonrenewable resource that is present in the soil in the form of inorganic orthophosphate (Pi) which is readily sequestered by cations (e.g., Ca 2+ , Al 3+ and Fe 3+ ), mostly under acid conditions (Tinker and Nye 2000): as a consequence, the mean free Pi in the soil does not usually exceed a 10 μM concentration (Bieleski 1973). In addition, due to the scarce mobility of Pi, plant uptake, via root epidermal cells and root hairs, leads to a rapid exhaustion of Pi availability near the root system, and creates a depleted zone .…”

Section: Introductionmentioning

confidence: 99%

The expression of GintPT, the phosphate transporter of Rhizophagus irregularis, depends on the symbiotic status and phosphate availability

Fiorilli

Lanfranco

Bonfante

2013

Planta

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The development of mutualistic interactions with arbuscular mycorrhizal (AM) fungi is one of the most important adaptation of terrestrial plants to face mineral nutrition requirements. As an essential plant nutrient, phosphorus uptake is acknowledged as a major benefit of the AM symbiosis, but the molecular mechanisms of its transport as inorganic phosphate (Pi) from the soil to root cells via AM fungi remain poorly known. Here we monitored the expression profile of the high-affinity phosphate transporter (PT) gene (GintPT) of Rhizophagus irregularis (DAOM 197198) in fungal structures (spores, extraradical mycelium and arbuscules), under different Pi availability, and in respect to plant connection. GintPT resulted constitutively expressed along the major steps of the fungal life cycle and the connection with the host plant was crucial to warrant GintPT high expression levels in the extraradical mycelium. The influence of Pi availability on gene expression of the fungal GintPT and the Medicago truncatula symbiosis-specific Pi transporter (MtPT4) was examined by qRT-PCR assay on microdissected arbusculated cells. The expression profiles of both genes revealed that these transporters are sensitive to changing Pi conditions: we observed that MtPT4 mRNA abundance is higher at 320 than at 32 μM suggesting that the flow towards the plant requires high concentrations. Taken on the whole, the findings highlight novel traits for the functioning of the GintPT gene and offer a molecular scenario to the models describing nutrient transfers as a cooperation between the mycorrhizal partners.

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Phosphate Pools, Phosphate Transport, and Phosphate Availability

Cited by 1,005 publications

References 0 publications

Interactive Effects of Salinity and Phosphorus Nutrition of the Concentrations of Phosphate and Phosphate Esters in Mature Photosynthesizing Corn Leaves

Interactive Effects of Salinity and Phosphorus Nutrition of the Concentrations of Phosphate and Phosphate Esters in Mature Photosynthesizing Corn Leaves

Effects of nitrogen and phosphorus supply on growth and physiological traits of two Larix species

The expression of GintPT, the phosphate transporter of Rhizophagus irregularis, depends on the symbiotic status and phosphate availability

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