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Parks, Sophie E.; Haigh, Anthony M.; Cresswell, G. C.

doi:10.1023/a:1026563926187

Cited by 46 publications

(8 citation statements)

References 29 publications

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“…However, the distribution patterns of soil nutrient densities in eastern China were generally consistent with the soil substrate age hypothesis that the younger and less leached soil in temperate regions tends to be more N-limited but less P-limited than the elder and more leached soil in tropical and subtropical regions (Reich and Oleksyn, 2004;Vitousek et al, 2010;Walker and Syers, 1976). Additionally, such patterns reflect that the factors not investigated in this study, such as soil age and parent material, could contribute to the patterns of nutrient pools, which should be considered in future research as potential drivers (Augusto et al, 2017;Porder and Chadwick, 2009).…”

Section: Potential Driving Factors Of the N And P Densities In Various Componentssupporting

confidence: 83%

Patterns of nitrogen and phosphorus pools in terrestrial ecosystems in China

Zhang

Yong

Tang

et al. 2021

Earth Syst. Sci. Data

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Abstract. Recent increases in atmospheric carbon dioxide (CO2) and temperature relieve their limitations on terrestrial ecosystem productivity, while nutrient availability constrains the increasing plant photosynthesis more intensively. Nitrogen (N) and phosphorus (P) are critical for plant physiological activities and consequently regulate ecosystem productivity. Here, for the first time, we mapped N and P densities and concentrations of leaves, woody stems, roots, litter, and soil in forest, shrubland, and grassland ecosystems across China based on an intensive investigation at 4868 sites, covering species composition, biomass, and nutrient concentrations of different tissues of living plants, litter, and soil. Forest, shrubland, and grassland ecosystems in China stored 6803.6 Tg N, with 6635.2 Tg N (97.5 %) fixed in soil (to a depth of 1 m) and 27.7 (0.4 %), 57.8 (0.8 %), 71.2 (1 %), and 11.7 Tg N (0.2 %) in leaves, stems, roots, and litter, respectively. The forest, shrubland, and grassland ecosystems in China stored 2806.0 Tg P, with 2786.1 Tg P (99.3 %) fixed in soil (to a depth of 1 m) and 2.7 (0.1 %), 9.4 (0.3 %), 6.7 (0.2 %), and 1.0 Tg P (< 0.1 %) in leaves, stems, roots, and litter, respectively. Our estimation showed that N pools were low in northern China, except in the Changbai Mountains, Mount Tianshan, and Mount Alta, while relatively higher values existed in the eastern Qinghai–Tibetan Plateau and Yunnan. P densities in vegetation were higher towards the southern and north-eastern part of China, while soil P density was higher towards the northern and western part of China. The estimated N and P density and concentration datasets, “Patterns of nitrogen and phosphorus pools in terrestrial ecosystems in China” (https://doi.org/10.5061/dryad.6hdr7sqzx), are available from the Dryad digital repository (Zhang et al., 2021). These patterns of N and P densities could potentially improve existing earth system models and large-scale research on ecosystem nutrients.

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Section: Potential Driving Factors Of the N And P Densities In Various Componentssupporting

confidence: 83%

Patterns of nitrogen and phosphorus pools in terrestrial ecosystems in China

Zhang

Yong

Tang

et al. 2021

Earth Syst. Sci. Data

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“…For example, the biomass of many Proteaceae increases with increasing P supply in a low P range, but decreases with further P supply due to P toxicity at a concentration that is much lower than used to grow crop plants (Grundon, 1972;Groves and Keraitis, 1976;Lambers et al, 2002;Shane et al, 2004a,b). In a greenhouse pot experiment, B. ericifolia shows a positive biomass response to P supply in a range of 30-150 mg P pot −1 , but its biomass greatly declines at 300 mg P pot −1 (Parks et al, 2000). Fresh weight of another Proteaceae, Banksia menziesii, is greatest at 1 µM P supply in nutrient solutions and decreases at 10 µM P (de Campos et al, 2013).…”

Section: Discussionmentioning

confidence: 96%

“…Hue (2009) evaluated the effects of P and Fe fertilizers and their interactions on the development of cluster roots in macadamia. Several authors showed that excess P supply causes P-toxicity symptoms in Proteaceae (Groves and Keraitis, 1976;Grose, 1989) such as Banksia ericifolia (Handreck, 1991;Parks et al, 2000), and H. prostrata (Shane et al, 2004a).…”

Section: Introductionmentioning

confidence: 99%

Leaf Phosphorus Concentration Regulates the Development of Cluster Roots and Exudation of Carboxylates in Macadamia integrifolia

et al. 2021

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Phosphorus (P) deficiency induces cluster-root formation and carboxylate exudation in most Proteaceae. However, how external P supply regulates these root traits in Macadamia integrifolia remains unclear. Macadamia plants were grown hydroponically with seven P levels to characterize biomass allocation, cluster-root development, and exudation of carboxylates and acid phosphatases. Plant biomass increased with increasing P supply, peaking at 5 μM P, was the same at 5–25 μM P, and declined at 50–100 μM P. Leaf P concentration increased with increasing P supply, but shoot biomass was positively correlated with leaf P concentration up to 0.7–0.8 mg P g–1 dry weight (DW), and declined with further increasing leaf P concentration. The number of cluster roots declined with increasing P supply, with a critical value of leaf P concentration at 0.7–0.8 mg P g–1 DW. We found a similar trend for carboxylate release, with a critical value of leaf P concentration at 0.5 mg g–1 DW, but the activity of acid phosphatases showed a gradually-decreasing trend with increasing P supply. Our results suggest that leaf P concentration regulates the development and functioning of cluster roots, with a critical P concentration of 0.5–0.8 mg g–1, above which macadamia growth is inhibited.

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“…P-sensitive species are found in the Fabaceae, Haemodoraceae, Mimosaceae, Myrtaceae, Proteaceae, Rutaceae, and generally are a feature of heaths and other sclerophyllous plant communities (Specht and Groves 1966; Grundon 1972; Heddle and Specht 1975; Specht et al 1977; Specht 1981; Dell et al 1987; Handreck 1997; Shane et al 2004b; Thomson and Leishman 2004; Hawkins et al 2008). Depending on the plant species (Shane et al 2004b), development of P toxicity symptoms can occur at a shoot P concentration of less than 1 mg P g −1 DW, such as in Banksia ericifolia (Parks et al 2000), or more than 40 mg P g −1 DW, as reported for Telopia speciosissima (Grose 1989). …”

Section: Introductionmentioning

confidence: 99%

Ecto- and arbuscular mycorrhizal symbiosis can induce tolerance to toxic pulses of phosphorus in jarrah (Eucalyptus marginata) seedlings

et al. 2014

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In common with many plants native to low P soils, jarrah (Eucalyptus marginata) develops toxicity symptoms upon exposure to elevated phosphorus (P). Jarrah plants can establish arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) associations, along with a non-colonizing symbiosis described recently. AM colonization is known to influence the pattern of expression of genes required for P uptake of host plants and our aim was to investigate this phenomenon in relation to P sensitivity. Therefore, we examined the effect on hosts of the presence of AM and ECM fungi in combination with toxic pulses of P and assessed possible correlations between the induced tolerance and the shoot P concentration. The P transport dynamics of AM (Rhizophagus irregularis and Scutellospora calospora), ECM (Scleroderma sp.), non-colonizing symbiosis (Austroboletus occidentalis), dual mycorrhizal (R. irregularis and Scleroderma sp.), and non-mycorrhizal (NM) seedlings were monitored following two pulses of P. The ECM and A. occidentalis associations significantly enhanced the shoot P content of jarrah plants growing under P-deficient conditions. In addition, S. calospora, A. occidentalis, and Scleroderma sp. all stimulated plant growth significantly. All inoculated plants had significantly lower phytotoxicity symptoms compared to NM controls 7 days after addition of an elevated P dose (30 mg P kg−1 soil). Following exposure to toxicity-inducing levels of P, the shoot P concentration was significantly lower in R. irregularis-inoculated and dually inoculated plants compared to NM controls. Although all inoculated plants had reduced toxicity symptoms and there was a positive linear relationship between rank and shoot P concentration, the protective effect was not necessarily explained by the type of fungal association or the extent of mycorrhizal colonization.

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Cited by 46 publications

References 29 publications

Patterns of nitrogen and phosphorus pools in terrestrial ecosystems in China

Patterns of nitrogen and phosphorus pools in terrestrial ecosystems in China

Leaf Phosphorus Concentration Regulates the Development of Cluster Roots and Exudation of Carboxylates in Macadamia integrifolia

Ecto- and arbuscular mycorrhizal symbiosis can induce tolerance to toxic pulses of phosphorus in jarrah (Eucalyptus marginata) seedlings

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