Expression analysis of putative high‐affinity phosphate transporters in Chinese winter wheats

Davies, T.G. Emyr; Ying, Jie‐Zheng; Xu, Qian; Li, Z. S.; Li, J.; Gordon-Weeks, R.

doi:10.1046/j.1365-3040.2002.00913.x

Cited by 55 publications

(53 citation statements)

References 33 publications

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“…However, in solution culture high P uptake efficiency can only depend on root architecture and the density of Pi transporters. Under field conditions, Lovrin 10 has been identified as more efficient than Jing 411 in P uptake and utilization (Davies et al, 2002). In the present hydroponic study, irrespective of external As concentrations, there were no significant differences in root biomass between the two cultivars ( Fig.…”

Section: Analysis Of Variancementioning

confidence: 51%

“…Under field conditions, the wheat cultivar Lovrin 10 has been identified as more efficient than cultivar Jing 411 in P uptake and utilization (Davies et al, 2002). In wheat, several Pi transporters have been identified and the expression pattern of phosphate transporters differs between these two cultivars (Davies et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…In wheat, several Pi transporters have been identified and the expression pattern of phosphate transporters differs between these two cultivars (Davies et al, 2002). Since arsenate was taken up by phosphate transporters, these two cultivars may also show different patterns of As uptake and translocation.…”

Section: Introductionmentioning

confidence: 99%

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Arsenate (As) uptake by and distribution in two cultivars of winter wheat (Triticum aestivum L.)

et al. 2006

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Two cultivars of winter wheat (Triticum aestivum L.) (Jing 411 and Lovrin 10) were used to investigate arsenate (As) uptake and distribution in plants grown in hydroponic culture and in the soil. Results showed that without As addition, Lovrin 10 had higher biomass than Jing 411 in the soil pot experiment; in the hydroponic experiment Lovrin 10 had similar root biomass to and lower shoot biomass than Jing 411. Increasing P supply from 32 to 161 lM resulted in lower tissue As concentrations, and increasing As supply from 0 to 2000 lM resulted in lower tissue P concentrations. Increasing P supply tended to increase shoot-to-root ratios of As concentrations, and increasing As supply tended to decrease shoot-to-root ratios of As concentrations. Both cultivars invested more in root production under P deficient conditions than under P sufficient conditions. Lovrin 10 invested more biomass production to roots than Jing 411, which might be partly responsible for higher shoot P and As concentrations and higher shoot-to-root ratios of As concentrations. Moreover, Lovrin 10 allocated less As to roots than Jing 411 and the difference disappeared with decreasing P supply.

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Section: Analysis Of Variancementioning

confidence: 51%

Section: Introductionmentioning

confidence: 99%

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Arsenate (As) uptake by and distribution in two cultivars of winter wheat (Triticum aestivum L.)

et al. 2006

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“…However, the functions of HvPHT1;3 and HvPHT1;4 in Pi homeostasis are not clear. Only one wheat PHT1 gene, TaPHT1;2D1, has been characterized so far (Miao et al, 2009), although several TaPHT1 genes are reported (Davies et al, 2002;Miao et al, 2009). Whole genomic sequences of barley and wheat are not yet available, which has hindered progress toward the functional characterization of PHT1 genes and their regulation in barley and wheat.…”

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confidence: 99%

Phosphate Utilization Efficiency Correlates with Expression of Low-Affinity Phosphate Transporters and Noncoding RNA, IPS1, in Barley

et al. 2011

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Genetic variation in phosphorus (P) efficiency exists among wheat (Triticum aestivum) and barley (Hordeum vulgare) genotypes, but the underlying mechanisms for the variation remain elusive. High-and low-affinity phosphate (Pi) PHT1 transporters play an indispensable role in P acquisition and remobilization. However, little is known about genetic variation in PHT1 gene expression and association with P acquisition efficiency (PAE) and P utilization efficiency (PUE). Here, we present quantitative analyses of transcript levels of high-and low-affinity PHT1 Pi transporters in four barley genotypes differing in PAE. The results showed that there was no clear pattern in the expression of four paralogs of the high-affinity Pi transporter HvPHT1;1 among the four barley genotypes, but the expression of a low-affinity Pi transporter, HvPHT1;6, and its close homolog HvHPT1;3 was correlated with the genotypes differing in PUE. Interestingly, the expression of HvPHT1;6 and HvPHT1;3 was correlated with the expression of HvIPS1 (for P starvation inducible; noncoding RNA) but not with HvIPS2, suggesting that HvIPS1 plays a distinct role in the regulation of the low-affinity Pi transporters. In addition, high PUE was found to be associated with high root-shoot ratios in low-P conditions, indicating that high carbohydrate partitioning into roots occurs simultaneously with high PUE. However, high PUE accompanying high carbon partitioning into roots could result in low PAE. Therefore, the optimization of PUE through the modification of low-affinity Pi transporter expression may assist further improvement of PAE for low-input agriculture systems.

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“…It would be worthwhile for previous studies, with data already available, to repeat the QTL analysis based upon relative yield, and compare the results with those previously published. In China, several P-efficient wheat varieties were identified by extensive screening of germplasm at high and low soil-P; the sole criterion for efficiency was relative yield, irrespective of the yield potential of the variety (Davies et al 2002).…”

Section: Genetics Of Puementioning

confidence: 99%

Genetic approaches to enhancing phosphorus-use efficiency (PUE) in crops: challenges and directions

2013

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Abstract. Many soils have intrinsically low concentrations of available phosphorus (P), which is a major limitation to crop and pasture growth. Regular applications of P have underpinned agricultural productivity internationally, and fertiliser use now constitutes one of the largest variable input costs to farming. Globally, high-quality reserves of P are being depleted and price increases are likely in the future. In addition, the effects of P pollution on water quality are attracting legislative regulation. Hence, there is a need to improve P-use efficiency (PUE) in farming systems.Progress in improving PUE has been limited for several reasons, including: inconsistent definitions of PUE, inappropriate phenotyping, incomplete understanding of the controls of P uptake, lack of field validation, and little consideration of genotype Â environment interactions that affect the expression of PUE. With greater consideration of these limitations, the powerful array of molecular and genomic tools currently available promises considerable advances in developing more P-efficient crops. Stronger interaction between molecular science and the traditional disciplines of plant breeding, crop physiology, soil science, and agronomy will allow new opportunities to study genetic differences in PUE, bringing P-efficient crops closer to reality.

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Expression analysis of putative high‐affinity phosphate transporters in Chinese winter wheats

Cited by 55 publications

References 33 publications

Arsenate (As) uptake by and distribution in two cultivars of winter wheat (Triticum aestivum L.)

Arsenate (As) uptake by and distribution in two cultivars of winter wheat (Triticum aestivum L.)

Phosphate Utilization Efficiency Correlates with Expression of Low-Affinity Phosphate Transporters and Noncoding RNA, IPS1, in Barley

Genetic approaches to enhancing phosphorus-use efficiency (PUE) in crops: challenges and directions

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