plant rooting Articles
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Combined effects of bisphenol A and cadmium on growth and nitrate assimilation of soybean seedling roots
Bisphenol A (BPA) and cadmium (Cd) pollution exist simultaneously in many regions. However, little information is available regarding the combined effects of BPA and Cd pollution on plants. Plant roots are in direct contact with the soil, which is an important compartment of BPA and Cd. Here, the effects of combined BPA and Cd pollution on soybean seedling roots were evaluated in pot ...
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Copper induced root growth inhibition of Allium cepa var. Agrogarum L. involves disturbances in cell division and DNA damage
Copper (Cu) is considered an indispensable microelement for plants. However, excessive Cu is toxic and disturbs several processes in the plant. The present study addressed the effects of ionic Cu (2.0 µM and 8.0 µM) on mitosis, microtubule cytoskeleton and DNA in root tip cells of Allium cepa var. agrogarum L., in order to better understand Cu toxicity on plant root systems. Results indicated ...
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Effects of bisphenol a on key enzymes in cellular respiration of soybean seedling roots
Environmental endocrine disrupter–bisphenol A (BPA) is ubiquitous in the environment, with potential toxic effects on plants. Previous studies found a significant effect of BPA on levels of mineral nutrients in plant roots, but the underlying mechanism remains unknown. To determine how BPA influences root mineral nutrients, the effects of BPA (1.5, 3.0, 6.0, 12.0, 24.0, 48.0 and 96.0 mg L−1) ...
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The rhizotoxicity of metal cations is related to their strength of binding to hard ligands
Mechanisms whereby metal cations are toxic to plant roots remain largely unknown. Aluminum, for example, has been recognised as rhizotoxic for about 100 years but there is no consensus on its mode of action. We contend that the primary mechanism of rhizotoxicity of many metal cations is non‐specific and that the magnitude of toxic effects is positively related to the strength with which they ...
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Detecting plant root diseases & pests
Soil-borne pests and diseases are harder to detect than those on the aerial parts of a plant. Visible symptoms in leaves and stem appear only in the final stages of the attacks. If plants are treated at this point, it may be difficult to avoid plant injury, as plants could already have been severely impacted. Early detection and identification are key to prevent crop loss. There are, however, ...
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Accumulation of contaminants of emerging concern in food crops, part two: Plant distribution
Arid agricultural regions often turn to using treated wastewater (reclaimed water) for irrigation of food crops. Concerns arise, however, when considering the potential for persistent contaminants of emerging concern (CECs) to accumulate into plants intended for human consumption. This work examined the accumulation of a suite of nine CECs into two representative food crops, lettuce and ...
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Salicylic acid for plants.
In reality the use of salicylic acid for plants has several benefits. In 1933, salicylic acid (SA) was first proposed to develop acquired immunity after disease infection. However, most of our knowledge about plant immune signalling has mainly been recent after it was found that salicylic acid (SA) is defence signal derived from within the plant. So what is this novel plant biostimulant? SA show ...
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Extraction of lead and cadmium from soils by Cysteine and Glutathione
Received for publication December 17, 2008. Metal-thiol complexes can enhance metal uptake by plant roots and microorganisms, therefore it is important to determine whether thiols effectively solubilize these metals from the soil matrix. Extractions were conducted by combining 1 g contaminated soil and 10 mL of 10 mmol L–1 thiol solution and shaking for 1 h. Both cysteine and glutathione ...
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Distribution of peroxidase activity and polyamine pattern of Heliotropium europeum in potassium deficiency conditions
Polyamines, especially putrescine, are reported to increase in higher plants in response to various stressors, in particular mineral deficiency, low pH and different atmospheric pollutants. Peroxidases are another stress indicator in plants. The aim of this study is to establish the relationship between polyamine content and peroxidase activity in potassium deficiency conditions. In this study, ...
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Nutrient sorption dynamics of resin membranes and resin bags in a tropical forest
Plant root simulator (PRS) probes, a resin membrane technology, are increasingly used to measure soil nutrient availability in agricultural and nonagricultural systems. Like other resin technologies, the charged surface is meant to sorb nutrients until saturation; however, there is evidence that it acts as a dynamic exchanger in soils with low nutrient availability. This study compared the ...
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How the University of Florida uses 200 root tube installations with the CI-602 root imager
The University of Florida, Institute of Food and Agricultural Sciences (UF/IFAS), Plant Root Biology Laboratory led by Dr. Lorenzo Rossi is located at the Indian River Research and Education Center (UF/IFAS IRREC) in Fort Pierce, Florida. Situated in the heart of the premiere grapefruit growing region of the world, the lab primarily uses the CI-602 root imager to study grapefruit root growth and ...
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Effect of exo-polysaccharides producing bacterial inoculation on growth of roots of wheat (Triticum aestivum L.) plants grown in a salt-affected soil
Abstract: Effect of soil salinity on physico-chemical and biological properties renders the salt-affected soils unsuitable for soil microbial processes and growth of the crop plants. Soil aggregation around roots of the plants is a function of the bacterial exo-polysaccharides (EPS), however, such a role of the EPS-producing bacteria in the saline environments has rarely been investigated. Pot ...
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Soil Regeneration - From the Ground Up
Imagine Dan’s delight to watch the documentary, Kiss the Ground, and have his vision confirmed. Since 1986, our owner/inventor Daniel Lee has engaged in deep, self-study of soil chemistry, biology, biochemistry, and metallurgy to discover the natural means by which nutrients are dissolved and released to supply energy to hungry plant roots thereby turning soils – that are otherwise ...
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Growth and phosphorus uptake of three riparian grass species
Riparian buffers can significantly reduce sediment-bound P entering surface water, but control of dissolved P inputs is more challenging. Because plant roots remove P from soil solution, it follows that plant uptake can reduce dissolved P losses. We evaluated P uptake of smooth bromegrass (Bromus inermis Leyss.), reed canarygrass (Phalaris arundinacea L.), and switchgrass (Panicum virgatum L.) ...
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Growth and phosphorus uptake of three riparian grass species
Riparian buffers can significantly reduce sediment-bound P entering surface water, but control of dissolved P inputs is more challenging. Because plant roots remove P from soil solution, it follows that plant uptake can reduce dissolved P losses. We evaluated P uptake of smooth bromegrass (Bromus inermis Leyss.), reed canarygrass (Phalaris arundinacea L.), and switchgrass (Panicum virgatum L.) ...
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Playing hide and seek below the soil
Below the soil of a diverse grassland area you’ll find a jungle of plant roots. It is also home to a wide variety of bacteria and fungi, of which some are pathogenic and looking for a host in the tangle of roots. It appears that this is much more difficult when there is a larger diversity of plants as the host plant is more able to hide among the varied crowd. Greater plant diversity ...
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Model-based investigations into long-term compost application effects on nitrate leaching at different agricultural sites
Organic waste materials may beneficially be used for fertilisation as well as for soil improvement on agricultural sites after composting and subsequent application. If compost is continuously applied at an annual scale of app. 10 Mg dry matter/ha, the content of organic matter in the soil will increase in the long-term, as shown in a field trial in Neu-Eichenberg, conducted 1985-97 by Univ. of ...
By ORBIT e.V.
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Hydroponic Spacer, the solution to Crazy Roots
Among the many diseases that can affect the root zone of the plant, bacterial diseases stand out for being potentially very harmful.. The main problem of these diseases is that there is no effective control of them through chemical treatments, so once the disease takes place it causes severe damage to the crop, reducing production and quality. The most effective way to avoid the negative impact ...
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Sound Advice: Increasing Nutrient Availability and Uptake
Sales agronomists Zach Carlson and Sarah Taylor discuss the relationship between soil microbes and soil health, and how this relationship impacts the bioavailability of the nutrients plants need. The presence of soil microbes makes a functional soil, holding and releasing nutrients that plants require. Proper levels of these microbes reduces plant stress and increases the bioavailability ...
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Comparison of in situ DGT measurement with ex situ methods for predicting cadmium bioavailability in soils with combined pollution to biotas
To assess the capabilities of the different techniques in predicting Cadmium (Cd) bioavailability in Cd-contaminated soils with the addition of Zn, one in situ technique (diffusive gradients in thin films; DGT) was compared with soil solution concentration and four widely used single-step extraction methods (acetic acid, EDTA, sodium acetate and CaCl2). Wheat and maize were selected as tested ...
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