Mineral stress: the missing link in understanding how global climate change will affect plants in real world soils

Lynch, Jonathan P.; Clair, Samuel B. St.

doi:10.1016/j.fcr.2004.07.008

Cited by 190 publications

(117 citation statements)

References 99 publications

Supporting

Mentioning

102

Contrasting

Unclassified

Order By: Relevance

“…Studies with Lynch and Clair [44], and Socha and Guerinot [45], have shown that Mn deficiency can be caused by multiple factors including high concentrations of other minerals in the soil, such as Fe, Mg, Ca, and P. The results of Ghasemi-Fasaei et al [46] showed that foliar application of Fe on chickpea decreased Mn uptake owing to the antagonistic effect of Fe on translocation of Mn from root to shoot. Similar to Mn, the uptake and translocation of Zn was also inhibited by Fe in the solution [47,48].…”

Section: Uptake Translocation Of Mn and Mnaementioning

confidence: 93%

Performance of Iron Plaque of Wetland Plants for Regulating Iron, Manganese, and Phosphorus from Agricultural Drainage Water

Jia

Otte

Liu

et al. 2018

Water

View full text Add to dashboard Cite

Agricultural drainage water continues to impact watersheds and their receiving water bodies. One approach to mitigate this problem is to use surrounding natural wetlands. Our objectives were to determine the effect of iron (Fe)-rich groundwater on phosphorus (P) removal and nutrient absorption by the utilization of the iron plaque on the root surface of Glyceria spiculosa (Fr. Schmidt.) Rosh. The experiment was comprised of two main factors with three regimes: Fe 2+ (0, 1, 20, 100, 500 mg·L −1 ) and P (0.01, 0.1, 0.5 mg·L −1 ). The deposition and structure of iron plaque was examined through a scanning electron microscope and energy-dispersive X-ray analyzer. Iron could, however, also impose toxic effects on the biota. We therefore provide the scanning electron microscopy (SEM) on iron plaques, showing the essential elements were iron (Fe), oxygen (O), aluminum (Al), manganese (Mn), P, and sulphur (S). Results showed that (1) Iron plaque increased with increasing Fe 2+ supply, and P-deficiency promoted its formation; (2) Depending on the amount of iron plaque on roots, nutrient uptake was enhanced at low levels, but at higher levels, it inhibited element accumulation and translocation; (3) The absorption of manganese was particularly affected by iron plague, which also enhanced phosphorus uptake until the external iron concentration exceeded 100 mg·L −1 . Therefore, the presence of iron plaque on the root surface would increase the uptake of P, which depends on the concentration of iron-rich groundwater.

show abstract

Section: Uptake Translocation Of Mn and Mnaementioning

confidence: 93%

Performance of Iron Plaque of Wetland Plants for Regulating Iron, Manganese, and Phosphorus from Agricultural Drainage Water

Jia

Otte

Liu

et al. 2018

Water

View full text Add to dashboard Cite

show abstract

“…5A). Because aspects of global change also impact ecosystem Mn fluxes, bioavailability in soils (43,44), plant uptake, and foliar litter concentrations (45), the tight coupling we demonstrate between Mn cycling and litter decomposition suggests that further research on regulators of ecosystem Mn fluxes is warranted.…”

Section: Discussionmentioning

confidence: 99%

Long-term litter decomposition controlled by manganese redox cycling

Keiluweit

Nico

Harmon

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

188

156

View full text Add to dashboard Cite

Litter decomposition is a keystone ecosystem process impacting nutrient cycling and productivity, soil properties, and the terrestrial carbon (C) balance, but the factors regulating decomposition rate are still poorly understood. Traditional models assume that the rate is controlled by litter quality, relying on parameters such as lignin content as predictors. However, a strong correlation has been observed between the manganese (Mn) content of litter and decomposition rates across a variety of forest ecosystems. Here, we show that long-term litter decomposition in forest ecosystems is tightly coupled to Mn redox cycling. Over 7 years of litter decomposition, microbial transformation of litter was paralleled by variations in Mn oxidation state and concentration. A detailed chemical imaging analysis of the litter revealed that fungi recruit and redistribute unreactive Mn 2+ provided by fresh plant litter to produce oxidative Mn 3+ species at sites of active decay, with Mn eventually accumulating as insoluble Mn 3+/4+ oxides. Formation of reactive Mn 3+ species coincided with the generation of aromatic oxidation products, providing direct proof of the previously posited role of Mn 3+ -based oxidizers in the breakdown of litter. Our results suggest that the litter-decomposing machinery at our coniferous forest site depends on the ability of plants and microbes to supply, accumulate, and regenerate short-lived Mn 3+ species in the litter layer. This observation indicates that biogeochemical constraints on bioavailability, mobility, and reactivity of Mn in the plant-soil system may have a profound impact on litter decomposition rates.terrestrial carbon cycle | nutrient cycling | forest soil ecosystems | soil-atmosphere interactions | climate change D ecomposition of above-ground plant detritus (litter) is a fundamental process regulating the release of nutrients for plant growth and the formation of soil organic matter (SOM) in forest ecosystems (1). Litter decomposition regulates the proportion of litter-derived carbon (C) that is either retained in the system as SOM or lost as CO 2 (2), thereby influencing net C storage in soils. Although even small decomposition rate increases may accelerate climate change by virtue of increasing CO 2 emissions from soils (3), uncertainty persists over the ratecontrolling mechanisms (4, 5).Litter decomposition rates are strongly influenced by climatic factors (e.g., temperature and moisture) and have long been linked to litter chemistry, specifically lignin content (6). Ligninan aromatic biopolymer-often makes up between 15% and 40% of the litter mass and is concentrated in cell walls (7). It encrusts cellulose microfibrils to form protective physical units ("ligno-cellulose complexes") that are embedded in a matrix of hemicellulose. Conventional thinking suggests that the relatively high initial litter decomposition rates are due to the preferential use of soluble and readily accessible polysaccharides and hemicelluloses relative to lignin components. In later stages, decompositi...

show abstract

“…It is common for stresses to occur simultaneously, although it is difficult to realistically simulate plant responses to simultaneous nutrient deficiencies (Dathe et al, 2011). In environments where multiple stresses may occur simultaneously (Rubio et al, 2003;Lynch and St Clair, 2004), tradeoffs for nutrient acquisition strategies often pose challenges to the plant. For example shallow rooting, which increases phosphorus acquisition, may reduce drought tolerance .…”

Section: Rca Formation Is An Adaptation To Multiple Nutrient Deficienmentioning

confidence: 99%

Root Cortical Aerenchyma Enhances the Growth of Maize on Soils with Suboptimal Availability of Nitrogen, Phosphorus, and Potassium

2011

View full text Add to dashboard Cite

Root cortical aerenchyma (RCA) is induced by hypoxia, drought, and several nutrient deficiencies. Previous research showed that RCA formation reduces the respiration and nutrient content of root tissue. We used SimRoot, a functional-structural model, to provide quantitative support for the hypothesis that RCA formation is a useful adaptation to suboptimal availability of phosphorus, nitrogen, and potassium by reducing the metabolic costs of soil exploration in maize (Zea mays). RCA increased the growth of simulated 40-d-old maize plants up to 55%, 54%, or 72% on low nitrogen, phosphorus, or potassium soil, respectively, and reduced critical fertility levels by 13%, 12%, or 7%, respectively. The greater utility of RCA on low-potassium soils is associated with the fact that root growth in potassium-deficient plants was more carbon limited than in phosphorusand nitrogen-deficient plants. In contrast to potassium-deficient plants, phosphorus-and nitrogen-deficient plants allocate more carbon to the root system as the deficiency develops. The utility of RCA also depended on other root phenes and environmental factors. On low-phosphorus soils (7.5 mM), the utility of RCA was 2.9 times greater in plants with increased lateral branching density than in plants with normal branching. On low-nitrate soils, the utility of RCA formation was 56% greater in coarser soils with high nitrate leaching. Large genetic variation in RCA formation and the utility of RCA for a range of stresses position RCA as an interesting crop-breeding target for enhanced soil resource acquisition.

show abstract

Mineral stress: the missing link in understanding how global climate change will affect plants in real world soils

Cited by 190 publications

References 99 publications

Performance of Iron Plaque of Wetland Plants for Regulating Iron, Manganese, and Phosphorus from Agricultural Drainage Water

Performance of Iron Plaque of Wetland Plants for Regulating Iron, Manganese, and Phosphorus from Agricultural Drainage Water

Long-term litter decomposition controlled by manganese redox cycling

Root Cortical Aerenchyma Enhances the Growth of Maize on Soils with Suboptimal Availability of Nitrogen, Phosphorus, and Potassium

Contact Info

Product

Resources

About