plant stress Articles
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Energy dependant plant stress acclimation
Plants may live and grow under suboptimal environmental conditions having certain biochemical and metabolic adaptations that facilitate their survival. Plant ‘‘metabolic flexibility’’ consists of the accomplishment of the same step ina metabolic pathway in a variety of different ways. Pyrophosphate which works as an energy donor when cellular ATP pools become diminished during stresses, ...
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UV-B-induced plant stress as a possible cause of ten-year hare cycles
Predation has been assumed to be a necessary factor in the ten-year population cycle of the snowshoe hare (Lepus americanus) and Canadian lynx (Lynx canadensis). The UV-B-induced plant stress hypothesis, in contrast, predicts that hare performance, especially reproduction, is negatively related to sunspot numbers, because production of UV-B-protective phenolics in food plants in periods of low ...
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Exploring photosynthesis and plant stress using inexpensive chlorophyll fluorometers
Mastering the concept of photosynthesis is of critical importance to learning plant physiology and its applications, but seems to be one of the more challenging concepts in biology. This teaching challenge is no doubt compounded by the complexity by which plants alter photosynthesis in different environments. Here we suggest the use of chlorophyll fluorometers in the undergraduate plant ...
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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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Water Stress
Plants experience water stress either when the water supply to their roots becomes limiting, or when the transpiration rate becomes intense. Water stress is primarily caused by a water deficit, such as a drought or high soil salinity. Each year, water stress on arable plants in different parts of the world disrupts agriculture and food supply with the final consequence: famine. Hence, the ability ...
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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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Sodium chloride enhances cadmium tolerance through reducing cadmium accumulation and increasing anti‐oxidative enzyme activity in tobacco
The effect of sodium chloride (NaCl) on cadmium (Cd) uptake, translocation and oxidative stress was investigated using two tobacco cultivars differing in Cd tolerance. The growth inhibition of the tobacco plants exposed to Cd toxicity was in part alleviated by moderate addition of NaCl in the culture solution. Cd concentration of shoots and roots in the two cultivars increased with increasing ...
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Effects of low-dose irradiation on two plant models: Stipa capillata and Pisum sativum
Plants are useful models for assessing the effects of radiation. We describe a short synthesis of our more recent results: radio-induced oxidative stress – our data suggest in chronically irradiated seeds of Stipa capillata a natural selection of the most adapted genotypes characterised by the capacity of induction of enzymes involved in the defence against radioactive stress; growth, ...
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Tree, Crop & Plant Stress – A Primer on Abiotic and Biotic Stressors
The natural conditions in which plants and trees grow are neither uniform nor controlled. Many changes or fluctuations, even if they are temporary, can have a negative impact on and stress plants. The factors which can lead to stress can be one of two types: abiotic or biotic. Stress can have serious repercussions on various phases of a plant’s growth and, ultimately, crop productivity. ...
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Tree, crop & plant stress – A primer on abiotic and biotic stressors
The natural conditions in which plants and trees grow are neither uniform nor controlled. Many changes or fluctuations, even if they are temporary, can have a negative impact on and stress plants. The factors which can lead to stress can be one of two types: abiotic or biotic. Stress can have serious repercussions on various phases of a plant’s growth and, ultimately, crop productivity. ...
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Evaluation of remote sensing to measure plant stress in creeping bentgrass (agrostis stolonifera l.) fairways
Turfgrass irrigation strategies must be clearly defined in response to increasing concerns over quality water availability. Water conservation may be achieved with technologies such as remote sensing. The objectives of this research were to (i) correlate reflectance measurements from creeping bentgrass (Agrostis stolonifera L.) under stress with volumetric water content and turf quality ...
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Response of yield heterosis to increasing plant density in maize
Genetic yield improvement in maize (Zea mays L.) has been associated with heterosis and increased tolerance to high plant densities, but the physiological processes underlying heterosis for tolerance to plant density stress have not been identified. The objective of this study was to quantify the response of heterosis for grain yield to increasing plant density, and to examine the processes ...
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Corn response to competition: growth alteration vs. yield limiting factors
Competition mechanisms among adjacent plants are not well understood. This study compared corn growth and yield responses to water, N, and shade at 74,500 plants ha–1 (1x) with responses to water and N when planted at 149,000 plant ha–1. Plant biomass, leaf area, chlorophyll content, reflectance, and enzyme expression (transcriptome analysis) were measured at V-12. Grain and stover yields were ...
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Nano silicon dioxide mitigates the adverse effects of salt stress on Cucurbita pepo L
Nanotechnology, an emerging science, has advanced research in almost all fields of technology. The aim of the present study was to evaluate the role of nano silicon dioxide (nSiO) in plant resistance to salt stress through improving the antioxidant system of squash (Cucurbita pepo L. cv. White Bush Marrow). We found that seeds treated with NaCl showed reduced germination percentage, vigor ...
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Chilling effects during maize tassel development and the lack of compensational plasticity
Stress during tassel formation can reduce tassel size and cause insufficient pollen production in seed production. When stresses affect plant development, component compensation for grain yield is known to occur in some crops. Tassel component compensation for pollen production has not been previously reported. Chilling was imposed on two dent maize (Zea mays L.) inbreds (103 and 113 relative ...
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The Power of Cytokinin: Unlocking Nature's Secret to Plant Growth and Development
Introduction of Cytokinin Cytokinin is an organic compound that belongs to the cytokinin family. It is widely used in plant physiology and agriculture due to its beneficial effects on plant growth and yield. Cytokinin is a potent growth hormone and is commonly used in plant tissue culture, induction of cell division and shoot proliferation, plant regeneration, and in vitro production of plant ...
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Effects of silicon and drought stress on tuber yield and leaf biochemical characteristics in potato
Silicon has beneficial effects on many crops, mainly under biotic and abiotic stresses. Silicon can affect biochemical, physiological, and photosynthetic processes and, consequently, alleviates drought stress. However, the effects of Si on potato (Solanum tuberosum L.) plants under drought stress are still unknown. The objective of this study was to evaluate the effect of Si supply on some ...
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White wheat grain quality changes with genotype, nitrogen fertilization, and water stress
The production of hard white winter (HWW) wheats (Triticum aestivum L.) with acceptable protein content and quality over different environments requires the correct combination of genotypes and management practices. The objectives of this study were to evaluate moisture deficit and N management on grain protein and quality of seven HWW and two soft white winter (SWW) genotypes, and to identify ...
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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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Grasslands Research Featuring CI-600 In-Situ Root Imager and RootSnap! Published in Invasive Plant and Science Management
University of Nebraska researchers Chengchou Han and Stephen L. Young have published their article “Root Growth of Two Perennial Grass Types and Musk Thistle (Carduus nutans) in Temperate Grasslands of North America” in the July/August edition mof Invasive Plant and Science Management. The article details their 2 year study using the CI-600 In-Situ Root Imager and free RootSnap! ...
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