Effects of Soil pH and Aluminum on Plant Respiration

Minocha, Rakesh; Minocha, Subhash C.

doi:10.1007/1-4020-3589-6_9

Cited by 7 publications

(6 citation statements)

References 149 publications

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“…Soil pH also mediates the availability of particular nutrients that can have specific roles in plant respiration. For instance, pH values below 4.5 solubilize manganese and aluminium, which can be toxic to plants, thereby increasing respiration requirements for detoxification (Minocha & Minocha, 2005). On the other hand, pH values above 6.5 increase the soil availability of magnesium, which can increase biochemical photosynthetic capacities for a given leaf N (and P) content and, as a consequence, for a given respiration rate (Wang et al , 2018).…”

Section: Discussionmentioning

confidence: 99%

“…In the least‐cost framework, soil pH likely impacts the unit cost of acquisition/utilization, assimilating N and other soil nutrients to build up C fixation capacity. Here we consider some (direct and indirect) potential mechanisms from molecular to ecosystem scales (see Table S4 for details), like the direct effect of soil pH on plant respiration, resulting from the cost required to maintain internal homeostasis of the cytosol, whose pH oscillates between 7 and 7.5 (Minocha & Minocha, 2005; Neina 2019). Soil pH also mediates the availability of particular nutrients that can have specific roles in plant respiration.…”

Section: Discussionmentioning

confidence: 99%

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When and where soil is important to modify the carbon and water economy of leaves

et al. 2020

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Summary Photosynthetic ‘least‐cost’ theory posits that the optimal trait combination for a given environment is that where the summed costs of photosynthetic water and nutrient acquisition/use are minimised. The effects of soil water and nutrient availability on photosynthesis should be stronger as climate‐related costs for both resources increase. Two independent datasets of photosynthetic traits, Globamax (1509 species, 288 sites) and Glob13C (3645 species, 594 sites), were used to quantify biophysical and biochemical limitations of photosynthesis and the key variable Ci/Ca (CO2 drawdown during photosynthesis). Climate and soil variables were associated with both datasets. The biochemical photosynthetic capacity was higher on alkaline soils. This effect was strongest at more arid sites, where water unit‐costs are presumably higher. Higher values of soil silt and depth increased Ci/Ca, likely by providing greater H2O supply, alleviating biophysical photosynthetic limitation when soil water is scarce. Climate is important in controlling the optimal balance of H2O and N costs for photosynthesis, but soil properties change these costs, both directly and indirectly. In total, soil properties modify the climate‐demand driven predictions of Ci/Ca by up to 30% at a global scale.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

When and where soil is important to modify the carbon and water economy of leaves

et al. 2020

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“…Unlike heavy metals, there is a lack of data on Al content in herbs, but the presence of this metal in herbal plants, and therefore in herbal cosmetics, is very possible due to the growing problem of the increasing Al concentration in plants. This is connected with the fact that sparingly soluble, poorly absorbed minerals containing Al present in large amounts in the Earth crust become better soluble owing to soil acidification (caused by acid rains) and for this reason Al is easier absorbed from soil by plants (Minocha and Minocha, ). Thus, more interest Table should be focused on the herbs used in cosmetology and herbal cosmetics contamination with Al.…”

Section: Metals In Traditional Cosmetics and Cosmetics Containing Hermentioning

confidence: 97%

Metals in cosmetics: implications for human health

Borowska

Brzóska

2015

J of Applied Toxicology

283

180

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Cosmetics, preparations repeatedly applied directly to the human skin, mucous membranes, hair and nails, should be safe for health, however, recently there has been increasing concern about their safety. Unfortunately, using these products in some cases is related to the occurrence of unfavourable effects resulting from intentional or the accidental presence of chemical substances, including toxic metals. Heavy metals such as lead, mercury, cadmium, arsenic and nickel, as well as aluminium, classified as a light metal, are detected in various types of cosmetics (colour cosmetics, face and body care products, hair cosmetics, herbal cosmetics, etc.). In addition, necessary, but harmful when they occur in excessive amounts, elements such as copper, iron, chromium and cobalt are also present in cosmetic products. Metals occurring in cosmetics may undergo retention and act directly in the skin or be absorbed through the skin into the blood, accumulate in the body and exert toxic effects in various organs. Some cases of topical (mainly allergic contact dermatitis) and systemic effects owing to exposure to metals present in cosmetics have been reported. Literature data show that in commercially available cosmetics toxic metals may be present in amounts creating a danger to human health. Thus, the present review article focused on the problems related to the presence of heavy metals and aluminium in cosmetics, including their sources, concentrations and law regulations as well as danger for the health of these products users. Owing to the growing usage of cosmetics it is necessary to pay special attention to these problems.

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“…These macronutrients and micronutrients are highly solubilized in soils between the pH range of 5.5 to 7.0 such that these high pH levels in the soil result in leaching of nutrients and releases aluminium in solubilized forms from its insoluble state [54]. Furthermore, it prevents cell division and growth in the roots; affects the plant's uptake of cations and stimulates organic acid secretion [55]. Heavy metal analysis showed that soil had a higher lead content (19.25) relative to arsenic (0.215), mercury (<0.001) and cadmium (0.725).…”

Section: Soil Characteristicsmentioning

confidence: 99%

Identification of Carbofuran and Paraquat Degrading Microorganisms from Soil

Ataikiru

Okerentugba

Okpokwasili

2020

SAJRM

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Introduction: Increased rates of pesticide misapplication and follow-on concerns on public health have become subjects of countless distress. The occurrence of pesticides in soils could result in modifications in soil physical, chemical as well as biological properties hence the need for ways to reduce such impacts. Research Gap: Insufficient literatures on extensive identification of pesticides’ degraders from non-impacted soils. Existing literatures are restricted to a particular microbial group (bacteria or fungi). Aim: The study aimed at isolating, characterizing and testing bacteria, moulds, yeasts and actinomyces from soil for the biodegradation of pesticides. Place and Duration of Study: The study was carried out at the Department of Environmental Management and Toxicology, Federal University of Petroleum Resources, Effurun and Federal Institute of Industrial Research, Oshodi, Lagos, Nigeria/ four months. Methodology: Carbofuran and Paraquat degrading microorganisms were isolated from a non-pesticides impacted soil using mineral salt medium (MSM). The MSM composed in grams per liter: K2HPO4, 4.8; KH2PO4, 1.2; NH4NO3, 1.0; MgSO4 7H2O, 0.2; Ca(NO3)2 .4H20, 0.4, and Fe(SO4)3, 0.001 supplemented with 2 mM Carbofuran or Paraquat as the only carbon source. The ability of the microbial isolates to utilize Carbofuran and Paraquat was screened on MSM containing 150 part per million of the pesticides as the only carbon source. The isolates were identified using the analytical profile index (API), microscopic and macroscopic characteristics. Results: Bacterial species identified were Bacillus, Pseudomonas, Kocuria, Enterobacter, Chryseobacterium, Corynebacterium, Acinetobacter, Paenibacillus, Lerclercia and Proteus. Actinomyces were Actinomyces isrealii, Actinomyces naeslundi, Actinomyces viscosus 1, Actinomyces meyeri and Actinomyces viscosus 2. Yeast isolates were Candida stellatoidea, Candida krusei and Saccharomyces cerevisiae while moulds were Talaromyces, Cladosporium carionii and Curvularia species. Conclusion: These findings indicated that Carbofuran and Paraquat degrading organisms are readily extant in soils and can be used to facilitate the removal of these pesticides from such polluted environments.

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Effects of Soil pH and Aluminum on Plant Respiration

Cited by 7 publications

References 149 publications

When and where soil is important to modify the carbon and water economy of leaves

When and where soil is important to modify the carbon and water economy of leaves

Metals in cosmetics: implications for human health

Identification of Carbofuran and Paraquat Degrading Microorganisms from Soil

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