Photosynthetic Rates
Photosynthetic Rates - Related Videos
03:54
Extraction and Purification of Plastoglobules from Photosynthetic Bacteria
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2025
Source: Shivaiah, K., et al. Plastoglobule Lipid Droplet Isolation from Plant Leaf Tissue and Cyanobacteria. J. Vis. Exp. (2022)The video demonstrates the isolation of plastoglobules from cyanobacteria. It begins with a culture of cyanobacteria and proceeds through cell disruption using mechanical force. The release of photosynthetic pigments indicates successful lysis. A sucrose step gradient is then used to separate cellular components by density, allowing low-density plastoglobules to form a...
07:12
High-Throughput, In-Field Screening of Photosynthetic Efficiency in Crop Plants Using an Autonomous Robot
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2026
This manuscript describes a non-destructive, high-throughput approach for autonomous field measurements of photosystem II quantum efficiency, spectral reflectance, and plant architecture, enabling large-scale canopy photosynthesis phenotyping in agronomic and breeding field trials.
08:01
Environmental Sampling of Photosynthetic Microbes and Their Viruses: From Field to Lab
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2025
Here, we describe methods of sampling from the euphotic zones of marine and freshwater ecosystems to isolate cyanophages (and their hosts) and post-sampling processes that enrich single genotypes and characterize virus-host interaction dynamics.
10:08
Construction and Setup of a Bench-scale Algal Photosynthetic Bioreactor with Temperature, Light, and pH Monitoring for Kinetic Growth Tests
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Cited by 4 •
2017
This paper describes the assembly process and operation of a bench-scale photosynthetic bioreactor that can be used, in conjunction with other methods, to estimate pertinent kinetic growth parameters. This system continuously monitors the pH, light, and temperature using sensors, a data acquisition and control unit, and open-source data acquisition software.
05:40
Comparison of Scale in a Photosynthetic Reactor System for Algal Remediation of Wastewater
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Cited by 3 •
2017
An experimental methodology is presented to compare the performance of small (100 L) and large (1,000 L) scale reactors designed for algae remediation of landfill wastewater. System characteristics, including surface area to volume ratio, retention time, biomass density, and wastewater feed concentrations, can be adjusted based on application.
FAQs
Each factor can change the speed of carbon assimilation by affecting a different requirement for photosynthesis. Light intensity influences light-driven electron transport, while carbon dioxide availability affects carbon fixation. Temperature modifies the overall activity of the photosynthetic system, and limited water status can reduce performance. Examining these variables helps identify which condition constrains photosynthesis in a particular organism or genotype.
Light-driven electron transport produces ATP and NADPH, which supply energy and reducing power for the Calvin cycle. The cycle uses these products to support carbon fixation, so a change in light reactions can influence the downstream rate of photosynthesis. Measuring photosynthetic performance therefore connects visible gas exchange outcomes with coordinated activity across chloroplast processes rather than with carbon fixation alone.
Consistent differences among plant varieties or engineered lines can indicate that genetic variation affects chloroplast function, enzyme activity, or stress responses. The measurement does not merely describe growth performance; it provides a physiological trait that can be compared with genetic differences. Such comparisons help researchers investigate how genes contribute to variation in photosynthesis under particular environmental conditions.
Researchers commonly quantify the process by measuring carbon dioxide uptake or oxygen production. They can then compare those measurements among plant varieties, engineered lines, or environmental conditions involving light, carbon dioxide, temperature, or water status. The resulting rate provides a direct quantitative outcome for evaluating how chloroplast activity and carbon fixation respond to genetic or environmental differences.
These measurements help evaluate whether genetic differences are associated with more effective photosynthetic performance or stronger responses to environmental stress. Comparing varieties or engineered lines can connect physiological variation with traits relevant to productivity and adaptation. The results may guide research into crop improvement by identifying lines whose photosynthetic behavior is valuable under defined environmental conditions.
Photosynthetic performance can serve as a measurable physiological trait linking genetic variation with several underlying processes, including chloroplast function, enzyme activity, and stress responses. Because the rate also changes with environmental conditions, comparisons across conditions can reveal how genetic effects interact with light, carbon dioxide, temperature, or water status. This supports investigation of complex trait biology rather than a single isolated function.