A5013481708- Light effects on plants
- Photosynthetic Processes and Mechanisms
- Plant Molecular Biology Research
- Greenhouse Technology and Climate Control
- Plant responses to elevated CO2
- Photoreceptor and optogenetics research
- Innovations in Aquaponics and Hydroponics Systems
- Atmospheric Ozone and Climate
- Impact of Light on Environment and Health
- Horticultural and Viticultural Research
- Plant Physiology and Cultivation Studies
- Irrigation Practices and Water Management
- Plant Water Relations and Carbon Dynamics
- Modular Robots and Swarm Intelligence
- CRISPR and Genetic Engineering
- Plant Pathogens and Resistance
- Water Quality Monitoring and Analysis
- Microbial Fuel Cells and Bioremediation
- Flowering Plant Growth and Cultivation
- Leaf Properties and Growth Measurement
- 3D Printing in Biomedical Research
- Plant Growth Enhancement Techniques
- Spaceflight effects on biology
- CO2 Reduction Techniques and Catalysts
- Postharvest Quality and Shelf Life Management
Texas A&M University
2020-2025
Mitchell Institute
2023
Utah State University
2019-2020
University of Georgia
2014-2018
University of Maine
2014-2015
Far-red photons (701-750 nm) are abundant in sunlight but considered inactive for photosynthesis and thus excluded from the definition of photosynthetically active radiation (PAR; 400-700 nm). Several recent studies have shown that far-red synergistically interact with shorter wavelength to increase leaf photochemical efficiency. The value canopy has not been studied. Here, we report effects on single 14 diverse crop species. Adding (up 40%) a background caused an equal adding nm photons....
Linear electron transport depends on balanced excitation of photosystem I and II. Far‐red light preferentially excites (PSI) can enhance the photosynthetic efficiency when combined with that over‐excites II (PSII). The different wavelengths far‐red exciting PSI was quantified by measuring change in quantum yield PSII (Φ ) lettuce ( Lactuca sativa under red/blue narrowband added (from 678 to 752 nm, obtained using laser diodes). Φ increased increasing from 703 indicating longer within this...
Far-red photons regulate shade avoidance responses and can have powerful effects on plant morphology radiation capture. Recent studies shown that far-red (700 to 750 nm) efficiently drive photosynthesis when added traditionally defined photosynthetic (400-700 nm). But the long-term of canopy quantum yield not yet been determined. We grew lettuce in a four-chamber, steady-state gas-exchange system separately quantify photon capture, for CO2 fixation, carbon use efficiency. These measurements...
OPINION article Front. Plant Sci., 22 June 2021 | https://doi.org/10.3389/fpls.2021.693445
Summary The current definition of photosynthetically active radiation includes only photons from 400 up to 700 nm, despite evidence the synergistic interaction between far‐red and shorter‐wavelength photons. synergy has not been studied in sunlight under natural conditions. We used a filter remove above nm quantify effects on photosynthesis diverse species full sun, medium light intensity vegetation shade. Far‐red (701 750 nm) are efficiently for photosynthesis. This is especially important...
A crewed mission to and from Mars may include an exciting array of enabling biotechnologies that leverage inherent mass, power, volume advantages over traditional abiotic approaches. In this perspective, we articulate the scientific engineering goals constraints, along with example systems, guide design a surface biomanufactory. Extending past arguments for exploiting stand-alone elements biology, argue integrated biomanufacturing plant replete modules microbial in situ resource utilization,...
Plants compete for light partly by over-producing chlorophyll in leaves. The resulting high absorption is an effective strategy out competing neighbors mixed communities, but it prevents transmission to lower leaves and limits photosynthesis dense agricultural canopies. We used a CRISPR/Cas9-mediated approach engineer rice plants with truncated light-harvesting antenna (TLA) via knockout mutations individual assembly component genes CpSRP43, CpSRP54a, its paralog, CpSRP54b. compared the...
UV-A radiation (320–400 nm) is an abiotic stressor that may be used to enhance the production of beneficial secondary metabolites in crops such as leafy vegetables. However, tradeoffs between enhanced phytochemical contents and overall growth/yield reductions have been reported. The responses varied depending on intensity, spectral peak, exposure time, species, varieties. We quantified changes growth, morphology, photosynthesis, phenolic sweet basil grown under a base red/blue/green LED...
Introduction Low light intensity and far-red (FR) act as shade signals to induce specific morphological changes mediated by plant photoreceptors phytochromes (PHYs). Applying FR or lowering over a longer photoperiod at constant daily integral (DLI) can increase crop yield enhancing leaf expansion photon capture. However, PHY activity is also dependent on temperature. We aimed investigate the interactive effects of light, intensity, photoperiod, temperature growth morphology. Methods Lettuce...
A promising approach for the synthesis of high value reduced compounds is to couple bacteria cathode an electrochemical cell, with delivery electrons from electrode driving reductive biosynthesis in bacteria. Such systems have been used reduce CO2 acetate and other C-based compounds. Here, we report electrosynthetic system that couples a diazotrophic, photoautotrophic bacterium, Rhodopseudomonas palustris TIE-1, cell through mediator H2 allows capture both N2 all energy coming infrared (IR)...
Commercial optical chlorophyll meters estimate relative content using the ratio of transmitted red light and near-infrared (NIR) emitted from a light-emitting diode (LED) an NIR LED. Normalized difference vegetation index (NDVI) sensors have detectors may be used to by detecting through leaves. In this study, leaf ‘Torrey’ buffaloberry ( Shepherdia × utahensis ) plants treated with 0 m [zero nitrogen (N)], 2 (medium N), or 4 (ample N) ammonium nitrate for 3 weeks were evaluated two...
Photosynthetic responses to light are dependent on intensity, vary among species, and can be affected by acclimation different environments (e.g., spectrum, photoperiod). Understanding how these factors affect photochemistry is important for improving supplemental lighting efficiency in controlled-environment agriculture. We used chlorophyll fluorescence determine photochemical response curves of three horticultural crops with contrasting requirements [sweetpotato ( Ipomea batatas ), lettuce...
Abstract Blue light induced stomatal opening has been studied by applying a short pulse (~5 to 60 s) of blue background saturating photosynthetic red photons, but little is known about steady‐state responses. Here we report responses at high and low CO 2 concentrations. Steady‐state conductance (g s ) C 3 plants increased asymptotically with increasing maximum 20% (120 μmol m −2 −1 ). This response was consistent from 200 800 mol atmospheric (C In contrast, only transient min) in 4 species...
Utilizing quantum dot (QD) luminescent films as a greenhouse covering material is an innovative method of modifying the light spectrum. The QD convert portion high-energy ultraviolet and blue photons to lower-energy photons. Previous research has shown that application in greenhouses led improved crop yields red lettuce tomatoes. However, underlying mechanism yield increases not been fully explored. We quantified effects solar spectral shifts attributable on plant morphology, radiation...
High temperatures during the crop growing season are becoming more frequent and unpredictable, resulting in reduced productivity quality. Heat stress disrupts plant metabolic processes that affect cell membrane composition integrity. Cell permeability, ion leakage, heat shock proteins have been evaluated to screen for tolerance plants. In potatoes, it is unclear whether leaf stability under correlated with underground tuber The main goal of this study was evaluate if relative electrolyte...
A crewed mission to and from Mars may include an exciting array of enabling biotechnologies that leverage inherent mass, power, volume advantages over traditional abiotic approaches. In this perspective, we articulate the scientific engineering goals constraints, along with example systems, guide design a surface biomanufactory. Extending past arguments for exploiting stand-alone elements biology, argue integrated biomanufacturing plant replete modules microbial \textit{in situ} resource...
There is currently little information regarding the impact of soil moisture on morphology and physiology English lavender ( Lavandula angustifolia ). Therefore, our goal was to determine substrate volumetric water content θ = volume ÷ substrate) this plant. We grew ‘Munstead’ ‘Hidcote’ at one four θ: 0.1, 0.2, 0.3, or 0.4 L·L −1 for 54 days using a capacitance sensor-automated irrigation system. Plant height, greatest width, inflorescence number, total leaf number area both cultivars...
Two experiments were conducted to determine how different substrate volumetric water contents (θ equals volume of per substrate) affected morphology and physiology three popular perennials using a capacitance sensor-automated irrigation system. In the first study, rosemary ( Rosmarinus officinalis ) was grown at one eight θ set points ranging from 0.05 0.40 L·L −1 . second Canadian columbine Aquilegia canadensis ‘Pink Lanterns’) cheddar pink Dianthus gratianopolitanus ‘Bath’s Pink’) nine...