photosynthesis Articles
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Photosynthesis Analysis with the CI-340 [WEBINAR]
In our latest webinar, Application Scientists Katrina Tso and Dennis Fisher, with guest Dr. Olyssa Starry, Assistant Professor of Urban Ecology at Portland State University, explain the many applications of photosynthesis measurement and demonstrate how to use the portable CI-340 Photosynthesis Analysis ...
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Exergy analyses of the biochemical processes of photosynthesis
This paper gives the exergy analyses of the main biochemical processes of photosynthesis in green plants. In the light reactions, photosystem I, photosystem II, and ATP-synthesis are found to operate at exergy efficiencies of 50%, 68% and 81%, respectively, so that 48% of the exergy of directly utilised solar photons is converted to biochemical energy carriers. Subsequently, in the dark ...
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Photosynthesis in Plants: Holly
Holly has been traditionally used as a Christmas decoration in many western countries. Being an evergreen plant, holly carries out photosynthesis throughout the year. In the cold winter months its leaves adapt to the lower temperatures by reducing their yield of photosynthesis. Interestingly the efficiency of photosynthesis follows an opposite trend to the quantum yield of fluorescence from ...
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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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Removal of arsenite from water by soil biotechnology
In this paper we present oxidation of As(III) to As(V) by formulated media via natural oxidation in Soil Biotechnology (SBT) and subsequent co-precipitation by ferric chloride. SBT houses an engineered ecology of formulated media containing selected micro and macroorganisms, such as earthworms, and indicator plants. In SBT, fundamental chemical reactions of nature, such as respiration, ...
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How to increase yield by optimizing spring growth
Spring is the period when winter rapeseed plants are speeding up their development. All the activities are increasing: biomass accumulation, leaf area development, photosynthesis. To support the intensification, necessary to maximize the number of seeds and therefore the yield, the plant has to uptake big amounts of nutrients. ...
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New Insight into the Importance of Key Photosynthesis Pathways in Plants
Photosynthesis is one of the most important chemical reactions, not only for plants, but also for the entire world. The impact of photosynthesis and its importance should not be underestimated. Therefore, it makes sense that science has long been fascinated by reactions and physical phenomena that enable photosynthesis to occur. One such phenomenon is the ferredoxin/thioredoxin (Fd/Trx) pathway. ...
By Lifeasible
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A comparison of three isolines of cotton differing in fiber color for yield, quality, and photosynthesis
Naturally colored cotton (Gossypium hirsutum L.) fibers (CCFs) are eco-friendly for the textile industry because they omit the dyeing process and reduce harmful effluent liquor. However, the low yield and quality of CCFs have greatly affected their development. Limited information is available on the reasons for the low yield and quality of CCFs. The aim of this 2-yr investigation was to compare ...
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Efficiency of carbon sequestration by added reactive nitrogen in ocean fertilisation
Addition of limiting nutrients to the surface waters of the deep ocean will lead to increased photosynthesis and associated biological productivity. Some of carbon taken up by phytoplankton will sink to the deep ocean, providing sequestration of carbon in the deep ocean. This paper considers nitrogen as the added nutrient and determines the losses in this sequestration process, taking into ...
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Morphological, anatomical, and physiological changes of orchardgrass leaves grown under fluctuating light regimes
The physiological and anatomical adaptability of pastures growing under trees in silvopastoral systems can alter the efficiency of conversion of energy to dry matter (DM). This study was conducted to determine the effects of different fluctuating light regimes (from 24 to 100% transmissivity) on leaf physiology, morphology, anatomy, and structure of orchardgrass (Dactylis glomerata L.) in a ...
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How to analyze photosynthesis in plants: Methods and tools
Life as we know it would be impossible without photosynthesis. Outside of providing the essential elements that support life on earth, photosynthesis is of special importance to the food and agriculture industry, as well as for ecologists studying climate change. In addition, there are many commercial enterprises which depend heavily on photosynthesis. As a result, there are a plethora of methods ...
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How to Analyze Photosynthesis in Plants: Methods and Tools
Photosynthesis: Why is it important? Life as we know it would be impossible without photosynthesis. Outside of providing the essential elements that support life on earth, photosynthesis is of special importance to the food and agriculture industry, as well as for ecologists studying climate change. In addition, there are many commercial enterprises which depend heavily on photosynthesis. As a ...
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Better photosynthesis for a better world?
There’s no question that plants are better than most other life forms at converting carbon dioxide and sunlight into the sugars that form the basis of our global food web — and eventually, humans’ entire food supply. But fact of the matter is, with conversion rates hovering around 2 percent for our best crop fields, they’re by no means great. Even a slight increase in the ...
By Ensia
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Water deficit alters canopy structure but not photosynthesis during the regrowth of Alfalfa
Growth of alfalfa (Medicago sativa L.) following the correction of a water deficit will depend in part on the characteristics of the canopy grown during the water deficit. The current study was undertaken to determine the extent to which canopy structure and photosynthetic capacity are affected in alfalfa plants regrowing following defoliation while exposed to a water deficit. The effects of five ...
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McCree – photosynthetic active radiation
Institute of Life Science and Biology Department, Texas A and M University, College Station, Texas U.S.A. Spectral quantum yields The aim of these measurements is to provide a factual basis for a standard definition o f “photosynthetically active radiation”. The need for a standard definition has been repeatedly emphasized (e.g., GABRIELSEN, 1940; RABINOWlTCH, 1951, ...
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Seasonal Dynamics of Periphyton in a Large Tropical Lake
Tropical aquatic systems are generally assumed to have little seasonality in productivity patterns. However, this study indicated that there was substantial seasonal variation in epilithic productivity and biomass in tropical Lake Tanganyika, due primarily to seasonal patterns in lake hydrodynamics that influence nutrient availability. Although they support much of the lake’s biological ...
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Extreme Makeover: Photosynthesis Edition
Plants are far better than humans at turning sunlight into food. But they’re not nearly as good as they could be: Thanks to quirks in the systems that have evolved to capture solar energy and use it to build sugars from carbon dioxide and water, the conversion efficiency of photosynthesis is but a few percent at best. With the need to produce more crops growing even faster than human ...
By Ensia
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The latest advances in photosynthesis measurement
Photosynthesis is undoubtedly one of the most important physiological processes on Earth. It is the process by which plants, algae, and bacteria produce food. Photosynthesis makes these organisms the primary producers of the earth, as all other organisms feed on them for their energy source. People depend on this important process for most of their needs: food, fiber, fuel, timber, etc. Also, ...
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Evaluation of nitrogen sources and application methods for nitrogen-rich reference plot establishment in corn
Five different N sources were compared with null N treatment to evaluate their performance for N-rich reference plot establishment in corn (Zea mays L.). The sources, including calcium ammonium nitrate (CAN), urea ammonium nitrate (UAN), polymer-coated urea (PCU) and environmentally smart nitrogen (ESN) in 2007 and 2008, and urea (URE), were broadcast or in-soil banded at the rate of 225 kg N ...
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Photosynthesis, chlorophyll fluorescence characteristics and chlorophyll content of soybean seedlings under combined stress of bisphenol A and cadmium
Bisphenol A (BPA) is ubiquitous in the environment due to its continual application in plastics and epoxy resin industry. Cadmium (Cd) is a highly toxic heavy metal element mainly used in smelting, electroplating and plastic/dye manufacturing. BPA and Cd pollution exist simultaneously in many agricultural regions. However, little information is available regarding the combined effects of BPA ...
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