Differentiating phosphate-dependent and phosphate-independent systemic phosphate-starvation response networks in Arabidopsis thaliana through the application of phosphite

Jost, Ricarda; Pharmawati, Made; Lapis-Gaza, Hazel R.; Roßig, Claudia; Berkowitz, Oliver; Lambers, Hans; Finnegan, Patrick M.

doi:10.1093/jxb/erv025

Cited by 64 publications

(48 citation statements)

References 83 publications

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“…There was a marked reduction in shoot and root growth in oat plants grown with Phi as the sole source of P (Figure 1a-b), which supports the view that Phi cannot replace Pi as a source of P in plants (Jost et al 2015;Ratjen and Gerendás 2009). In fact, the Phi supply was phytotoxic to oat, as suggested by the lower dry matter production in Phi plants versus Pi-D.…”

Section: Discussionsupporting

confidence: 73%

Phosphite and Phosphate Have Contrasting Effects on Nutrient Status of Plants

Zambrosi

2016

Journal of Crop Improvement

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A comprehensive knowledge of the factors underlying the performance of plants under phosphite (Phi) nutrition is critical for its rational use in agriculture. Therefore, the effects of Phi on nutrient status of plants were evaluated by growing oat (Avena sativa) for 60 days in nutrient solutions containing three P treatments: 0.5 mmol L −1 of phosphate (Pi sufficient, Pi-S), 0.05 mmol L −1 of Pi (Pi deficient, Pi-D), and 0.5 mmol L −1 of Phi. In comparison with Pi-S, the Phi impaired plant growth in a more pronounced manner than Pi-D, suggesting toxic effects. Phi plants did not show any variation in N, P, and Ca concentrations in the shoot, but there were reductions in the concentrations of Mg and S and increased concentrations of K, B, Mn, and Zn compared with Pi-S plants. In the root, the Phi decreased the concentrations of P, Ca, Mg, S, and B but increased N, K, Fe, and Mn. In conclusion, Phi and Pi had distinct influence on nutrient status of oat, which contributes to explaining the contrasting performance of plants under Pi or Phi nutrition. These results might also suggest the need for a differential nutritional management in plants under frequent Phi applications.

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Section: Discussionsupporting

confidence: 73%

Phosphite and Phosphate Have Contrasting Effects on Nutrient Status of Plants

Zambrosi

2016

Journal of Crop Improvement

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“…No differences existed among variants and treatments for total root length (TRL) and surface area (SA), suggesting that Phytophthora did not cause a notable destruction of the root system. The number of root tips decreased in the treatments with phosphites [28,70], and a similar situation was noted with number of tips (NoT) and fine root tips (FRT). The toxicity of phosphites to roots probably triggers a resistance mechanism of the plants against pathogens.…”

Section: Discussionsupporting

confidence: 67%

Survival of European Ash Seedlings Treated with Phosphite after Infection with the Hymenoscyphus fraxineus and Phytophthora Species

Keča

Tkaczyk

Żółciak

et al. 2018

Forests

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The European Fraxinus species are threatened by the alien invasive pathogen Hymenoscyphus fraxineus, which was introduced into Poland in the 1990s and has spread throughout the European continent, causing a large-scale decline of ash. There are no effective treatments to protect ash trees against ash dieback, which is caused by this pathogen, showing high variations in susceptibility at the individual level. Earlier studies have shown that the application of phosphites could improve the health of treated seedlings after artificial inoculation with H. fraxineus. Three-year-old F. excelsior seedlings were inoculated with the following pathogens: a H. fraxineus, Phytophthora species mixture (P. plurivora, P. megasperma, and P. taxon hungarica), in combination with two pathogens and mock-inoculated as the control, and then either watered or treated with ammonium phosphite (Actifos). Results showed significant differences in the survival of seedlings and symptoms of disease development among the treatments. Chlorophyll-a fluorescence parameters indicated a decrease in photosynthetic efficiency in infected plants, suggesting that they were under strong biotic stress, but none of the parameters could be used as a reliable bioindicator for ash decline disease. The application of Actifos enhanced the production of triterpenes (ursolic and oleanolic acid), and decreased the production of phenols (tyrosol) and sterols (β-sitosterol) in seedlings infected with H. fraxineus. Treatment with Actifos caused seedlings to enhance their response to pathogen(s) attack and increase their survival probability.

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“…, membrane lipid remodeling with down-regulation of SQD2 (Jost et al, 2015), and transfer of digalactosyldiacylglycerol from chloroplasts to mitochondria (Jouhet et al, 2004). Overall, the cumulative regulation of glycerol metabolism observed in our study may reflect a flux reconfiguration in B. nigra to sustain mitochondrial activity, which led to the accumulation of glycerol as an intermediate metabolite in the pathway (Kleijn et al, 2007;Morandini, 2013;Gomes de Oliveira Dal'Molin et al, 2015).…”

Section: )mentioning

confidence: 59%

Central Metabolic Responses to Ozone and Herbivory Affect Photosynthesis and Stomatal Closure

et al. 2016

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Plants have evolved adaptive mechanisms that allow them to tolerate a continuous range of abiotic and biotic stressors. Tropospheric ozone (O 3 ), a global anthropogenic pollutant, directly affects living organisms and ecosystems, including plant-herbivore interactions. In this study, we investigate the stress responses of Brassica nigra (wild black mustard) exposed consecutively to O 3 and the specialist herbivore Pieris brassicae. Transcriptomics and metabolomics data were evaluated using multivariate, correlation, and network analyses for the O 3 and herbivory responses. O 3 stress symptoms resembled those of senescence and phosphate starvation, while a sequential shift from O 3 to herbivory induced characteristic plant defense responses, including a decrease in central metabolism, induction of the jasmonic acid/ethylene pathways, and emission of volatiles. Omics network and pathway analyses predicted a link between glycerol and central energy metabolism that influences the osmotic stress response and stomatal closure. Further physiological measurements confirmed that while O 3 stress inhibited photosynthesis and carbon assimilation, sequential herbivory counteracted the initial responses induced by O 3 , resulting in a phenotype similar to that observed after herbivory alone. This study clarifies the consequences of multiple stress interactions on a plant metabolic system and also illustrates how omics data can be integrated to generate new hypotheses in ecology and plant physiology.

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Differentiating phosphate-dependent and phosphate-independent systemic phosphate-starvation response networks in Arabidopsis thaliana through the application of phosphite

Abstract: HighlightPhosphate transporters AtPHT1;8 and AtPHT1;9, but not AtPHT1;1, discriminate between phosphite and phosphate. Phosphate-starvation-responsive transcript profiles show altered kinetics with phosphite, hence allowing further dissection of phosphorus signalling networks.

Cited by 64 publications

References 83 publications

Phosphite and Phosphate Have Contrasting Effects on Nutrient Status of Plants

Phosphite and Phosphate Have Contrasting Effects on Nutrient Status of Plants

Survival of European Ash Seedlings Treated with Phosphite after Infection with the Hymenoscyphus fraxineus and Phytophthora Species

Central Metabolic Responses to Ozone and Herbivory Affect Photosynthesis and Stomatal Closure

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