Molecular mechanisms in response to phosphate starvation in rice

Panigrahy, Madhusmita; Rao, D. N.; Neelamraju, Sarla

doi:10.1016/j.biotechadv.2009.02.006

Cited by 66 publications

(58 citation statements)

References 91 publications

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“…Demand for low-input sustainable crop cultivation is necessary to meet the need of environmentally friendly agriculture. Consequently, developing/selecting crop germplasms better adapted to P starvation with better P uptake and nutrient-use efficiency has now become one of the major objectives of crop improvement programs (Panigrahy, Rao, and Sarla 2009). Such crops could produce comparable yields with lower inputs of inorganic Pi fertilizers or have reduced physiological P requirements and tissue concentrations, thus reducing the amount of P removed by the crop and thereby the amount of P needed to maintain the availability of Pi in the soil (Hammond et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Stress Induced Variations in Growth Behavior and P Efficiency amongBrassicaCultivars Grown with Sparingly Soluble P Sources

Akhtar

Oki

Nishigaki

et al. 2014

Communications in Soil Science and Plant Analysis

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To evaluate phosphorus (P)-stress-induced relative growth responses, P-efficiency characteristics, P remobilization, and redesign in root architectural systems, Brassica cultivars were grown with sparingly soluble rock phosphate and calcium phosphate [Ca 3 (PO 4 ) 2 ] or with low/high P supply in solution and sand culture experiments. Tested cultivars showed considerable genetic diversity in biomass accumulation, concentration and contents of P, P-stress factor (PSF), and P-efficiency characteristics [P-utilization efficiency (PUE), P efficiency (PE), and P-efficiency ratio (PER)]. Statistically significant correlations were observed between P efficiency and growth parameters. Elongation rates of primary roots decreased but the length of lateral roots and branched zone elongation rates increased under P starvation. Cultivars remobilized P from metabolically inactive to active sites in P-stressed plants that may have helped low-P-tolerant cultivars to establish a better rooting system, which provided basis for enhanced P-use efficiency and tolerance against P stress. Cultivars depicting high P efficiency and low PSF values were more tolerant and are a better choice to grow under P-stress environments.

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Section: Introductionmentioning

confidence: 99%

Phosphorus Stress Induced Variations in Growth Behavior and P Efficiency amongBrassicaCultivars Grown with Sparingly Soluble P Sources

Akhtar

Oki

Nishigaki

et al. 2014

Communications in Soil Science and Plant Analysis

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“…Si is not readily accumulated in the grain but rather deposited in the husk, which is primarily xylem fed (24). Phosphate is taken up by plant roots via the xylem and then translocated to other parts of the plant, depending on metabolic needs (25).…”

Section: Introductionmentioning

confidence: 99%

Arsenic Shoot-Grain Relationships in Field Grown Rice Cultivars

Norton

Islam

Duan

et al. 2010

Environ. Sci. Technol.

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Arsenic (As) accumulation in rice grains is a risk to human health. The mechanism of transfer of As from the shoot into the grain during grain filling is unknown at present. In this study As speciation in the shoot and grains at maturity were examined, and the relationships between phosphorus (P) and As, and silicon (Si) and As were established in a wide range of cultivars grown in As contaminated field trials in Bangladesh and China. No correlations were observed between shoot and grain speciation, with the inorganic form comprising 93.0-97.0% of As in the shoot and 63.0-83.7% in the grains. The percentage of dimethylarsinic acid (DMA) was between 1.4 and 6.6% in the shoot and 14.6 and 37.0% in the grains; however, the concentrations were comparable, ranging from 0.07 to 0.26 mg kg -1 in the shoots and 0.03 to 0.25 mg kg -1 in the grains. A positive correlation was observed between shoot As and shoot Si, however, no correlation was observed between shoot Si and grain As. A significant negative correlation was observed between shoot P and grain As concentrations. These results suggest that the translocation of As into the grain from the shoots is potentially using P rather than Si transport mechanisms. The findings also indicate that inorganic As and DMA translocation to the grain differ considerably.

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“…A general strategy has been described under the term topsoil foraging that favors a shallower root system to explore the upper part of the soil, where phosphate tends to be more available because of the presence of organic matter and animal excrements. Although this term was first introduced to describe root system adaptation in bean (Phaseolus vulgaris; Lynch and Brown, 2001), the set of responses behind the topsoil foraging strategy has now been described in many other species (Panigrahy et al, 2009;Péret et al, 2011;Li et al, 2012;Shi et al, 2013). We will give an up-to-date overview of recent publications on developmental adaptations to low phosphate observed in diverse monocot and dicot species by focusing on the responses of the primary root (PR) and lateral roots.…”

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Root Architecture Responses: In Search of Phosphate

Péret¹,

Desnos²,

Jost³

et al. 2014

Plant Physiol.

227

141

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Soil phosphate represents the only source of phosphorus for plants and, consequently, is its entry into the trophic chain. This major component of nucleic acids, phospholipids, and energy currency of the cell (ATP) can limit plant growth because of its low mobility in soil. As a result, root responses to low phosphate favor the exploration of the shallower part of the soil, where phosphate tends to be more abundant, a strategy described as topsoil foraging. We will review the diverse developmental strategies that can be observed among plants by detailing the effect of phosphate deficiency on primary and lateral roots. We also discuss the formation of cluster roots: an advanced adaptive strategy to cope with low phosphate availability observed in a limited number of species. Finally, we will put this work into perspective for future research directions.

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Molecular mechanisms in response to phosphate starvation in rice

Cited by 66 publications

References 91 publications

Phosphorus Stress Induced Variations in Growth Behavior and P Efficiency amongBrassicaCultivars Grown with Sparingly Soluble P Sources

Phosphorus Stress Induced Variations in Growth Behavior and P Efficiency amongBrassicaCultivars Grown with Sparingly Soluble P Sources

Arsenic Shoot-Grain Relationships in Field Grown Rice Cultivars

Root Architecture Responses: In Search of Phosphate

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