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Silber, A.; Ben-Jaacov, J.; Ackerman, Alexander; Bar‐Tal, Asher; Levkovitch, I.; Matsevitz-Yosef, Tania; Swartzberg, Dvora; Riov, J.; Granot, David

doi:10.1023/a:1020432512980

Cited by 29 publications

(9 citation statements)

References 51 publications

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“…It is not clear whether decreased Zn uptake or dilution following increased biomass production are the primary reason for P-induced Zn deficiency (Singh et al, 1988; Gianquinto et al, 2000; Zhu et al, 2001; Li et al, 2003). Genes en-coding high-affinity orthophosphate transporters are up-regulated under Zn deficiency (Huang et al, 2000) resulting in higher P uptake, potentially accompanied by P toxicity which can be alleviated by addition of Zn (Marschner and Cakmak, 1986; Silber et al, 2002). …”

Section: Introductionmentioning

confidence: 99%

Elevated Phosphorus Impedes Manganese Acquisition by Barley Plants

Pedas¹,

Husted²,

Skytte³

et al. 2011

Front. Plant Sci.

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The occurrence of manganese (Mn) deficiency in cereal crops has increased in recent years. This coincides with increasing phosphorus (P) status of many soils due to application of high levels of animal manure and P-fertilizers. In order to test the hypothesis that elevated P my lead to Mn deficiency we have here conducted a series of hydroponics and soil experiments examining how the P supply affects the Mn nutrition of barley. Evidence for a direct negative interaction between P and Mn during root uptake was obtained by on-line inductively coupled plasma mass spectrometry (ICP-MS). Addition of a pulse of KH2PO4 rapidly and significantly reduced root Mn uptake, while a similar concentration of KCl had no effect. Addition of a P pulse to the same nutrient solution without plants did not affect the concentration of Mn, revealing that no precipitation of Mn–P species was occurring. Barley plants growing at a high P supply in hydroponics with continuous replenishment of Mn2+ had up to 50% lower Mn concentration in the youngest leaves than P limited plants. This P-induced depression of foliar Mn accelerated the development of Mn deficiency as evidenced by a marked change in the fluorescence induction kinetics of chlorophyll a. Also plants growing in soil exhibited lower leaf Mn concentrations in response to elevated P. In contrast, leaf concentrations of Fe, Cu, and N increased with the P supply, supporting that the negative effect of P on Mn acquisition was specific rather than due to a general dilution effect. It is concluded that elevated P supply directly interferes with Mn uptake in barley roots and that this negative interaction can induce Mn deficiency in the shoot. This finding has major implications in commercial plant production where many soils have high P levels.

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Section: Introductionmentioning

confidence: 99%

Elevated Phosphorus Impedes Manganese Acquisition by Barley Plants

Pedas¹,

Husted²,

Skytte³

et al. 2011

Front. Plant Sci.

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“…Biomass increment provided by nitrogen was enhanced by phosphorus in species from both biomes. However, in the savanna species, when there was no nitrogen, the addition of phosphorus reduced the biomass acquisition -perhaps an indication of phosphorus toxicity (Mohidin et al, 2015;Paganeli et al, 2020;Silber et al, 2002). (see Figure 2).…”

Section: Discussionmentioning

confidence: 99%

Effects of nitrogen and phosphorus availability on the early growth of two congeneric pairs of savanna and forest species

Paganeli

Batalha

2022

Braz. J. Biol.

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In the tropical region, savannas and seasonal forests, both highly diverse biomes, occur side by side, under the same climate. If so, that mosaic cannot be explained solely by climatic variables, but also by fire, water availability and soil status. Nutrient availability in the soil, especially nitrogen and phosphorus, has been postulated to explain the abrupt transitions between savannas and seasonal forests in tropical regions. Plants from these two biomes may present different nutritional strategies to cope with nitrogen and phosphorus limitation. We used two congeneric pairs of trees — each pair with a species from the savanna and another from the neighboring seasonal forest — to test whether savanna and forest species presented different nutritional strategies during their early development. We cultivated 56 individuals from each of these species in a hydroponics system with four treatments: (1) complete Hoagland solution, (2) Hoagland solution without nitrogen, (3) Hoagland solution without phosphorus, and (4) Hoagland solution without nitrogen and phosphorus. After 45 days, we harvested the plants and measured total biomass, root to shoot ratio, height, leaf area, and specific leaf area. Overall, savanna species were lighter, shorter, with smaller leaves, higher specific leaf areas, and higher root to shoot ratios when compared to the forest species. Nitrogen increased the performance of species from both biomes. Phosphorus improved the performance of the forest species and caused toxicity symptoms in the savanna species. Hence, savanna and forest species presented different demands and were partially distinct already as seedlings concerning their nutritional strategies.

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“…While excessive bioavailable and soluble P in soils has not until fairly recently been seen as directly detrimental to soil fertility as revealed by agronomic extension publication, negative environmental consequences such as groundwater and surface water eutrophication are well known to result from overfertilized farmlands [21,45,46]. In addition, however, phosphate is known to induce deficiency in crops of certain mi-cronutrients, including Zn, Mn, and Fe, and therefore can be considered a potentially toxic element if it reaches high levels of bioavailability in soils [24][25][26][27]29].…”

Section: Extractable and Leachable Soil Elementsmentioning

confidence: 99%

“…Although P toxicity has not been considered to occur commonly with field crops in the past, more recent research and field experience indicate that P toxicity and associated micronutrient deficiencies are becoming more common in field crops as soil phosphorus levels increase due to overapplication of P fertilizers or manures [22][23][24]. The mechanisms by which high P status in soils and crops cause deleterious effects on crop growth are not fully understood, but Zn, Mn, and/or Fe deficiency in plants induced by high tissue P concentrations appears to be the cause of phytotoxicity [24,25]. In fact, P-induced Zn deficiency has been well known and documented for many years [26,27].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Biosolids Application on Land: Beneficial Recycling of Nutrients or Eutrophication of Agroecosystems?

McBride

2022

Soil Systems

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The impact of repeated application of alkaline biosolids (sewage sludge) products over more than a decade on soil concentrations of nutrients and trace metals, and potential for uptake of these elements by crops was investigated by analyzing soils from farm fields near Oklahoma City. Total, extractable (by the Modified Morgan test), and water-soluble elements, including macronutrients and trace metals, were measured in biosolids-amended soils and, for comparison, in soils that had received little or no biosolids. Soil testing showed that the biosolids-amended soils had higher pH and contained greater concentrations of organic carbon, N, S, P, and Ca than the control soils. Soil extractable P concentrations in the biosolids-amended soils averaged at least 10 times the recommended upper limit for agricultural soils, with P in the amended soils more labile and soluble than the P in control soils. Several trace elements (most notably Zn, Cu, and Mo) had higher total and extractable concentrations in the amended soils compared to the controls. A radish plant assay revealed greater phytoavailability of Zn, P, Mo, and S (but not Cu) in the amended soils. The excess extractable and soluble P in these biosolids-amended soils has created a long-term source of slow-release P that may contribute to the eutrophication of adjacent surface waters and contamination of groundwater. While the beneficial effects of increased soil organic carbon on measures of “soil health” have been emphasized in past studies of long-term biosolids application, the present study reveals that these benefits may be offset by negative impacts on soils, crops, and the environment from excessive nutrient loading.

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Cited by 29 publications

References 51 publications

Elevated Phosphorus Impedes Manganese Acquisition by Barley Plants

Elevated Phosphorus Impedes Manganese Acquisition by Barley Plants

Effects of nitrogen and phosphorus availability on the early growth of two congeneric pairs of savanna and forest species

Long-Term Biosolids Application on Land: Beneficial Recycling of Nutrients or Eutrophication of Agroecosystems?

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