Outreach is an important part of what we do. The lab members give many presentations at grower and scientific meetings. The following presentations have been recorded and are freely accessible on-line. They are grouped by general topic.
Horticultural Lighting
2021 American Society for Horticultural Science Conference in Denver, CO
Lettuce Dry Matter Partitioning and Canopy Development of Five Different Cultivars over a Growing Cycle
Changhyeon Kim and Marc W van Iersel
Chlorophyll Fluorescence Imaging to Monitor High Light Stress in Leafy Greens
Jun Liu and Marc van Iersel
Reducing Energy Requirements for Greenhouses Lighting through Carry-over of ‘Excess’ Light to the Next Day
Theekshana “TC” Jayalath and Marc W van Iersel
Lowering the Target DLI Following Sunny Days Can Reduce Lighting Costs in Greenhouse Lettuce Production
Andres M Mayorga-Gomez and Marc W van Iersel
Estimating the Electricity Use and Cost of Supplemental Greenhouse Lighting Using an on-Line App
Dalton Croy, Marc W van Iersel, Maria Twedt, Richard Watson and Marie-Claude Boudreau
2020 American Society for Horticultural Science Conference, Virtual
The Quantum Requirement for CO2 Assimilation Increases with Increasing Photosynthetic Photon Flux Density and Leaf Anthocyanin Concentration in Lettuce
Changhyeon Kim and Marc W. van Iersel
Supplemental Far-Red Light Increases Final Yield of Indoor Lettuce Production By Boosting Light Interception at the Seedling Stage
Jun Liu and Marc W. van Iersel
Supplemental Far-Red Light Does Not Increase Growth of Greenhouse-Grown Lettuce
Theekshana “TC” Jayalath and Marc W. van Iersel
Only Extreme Fluctuations in Lights Levels Reduce Lettuce Growth
Ruqayah Bhuiyan and Marc W. van Iersel
Light Intensity Changes Leaf-Level and Crop-Level Water Use Efficiency
Laura E Reese and Marc W. van Iersel
2019 American Society for Horticultural Science Conference in Las Vegas, NV
Morphological and Physiological Screening for Growth Differences Among 11 Lettuce Cultivars (video hosted by ASHS)
Changhyeon Kim and Marc W. van Iersel
Green Light Benefit Photosynthesis at High Light Level (video hosted by ASHS)
Jun Liu and Marc W. van Iersel
Supplemental Lighting for Biomass Increase of Cilantro and Basil Plants (video hosted by ASHS)
Theekshana “TC” Jayalath and Marc W. van Iersel
Greenhouse Light to a Target Daily Light Integral Using Dimmable Supplemental Lights (video hosted by ASHS)
Geoffrey Weaver and Marc W. van Iersel
The Effect of Supplemental Far-Red Light Spectrum on the Canopy Size of Lettuce (Lactuca sativa)
Reeve Legendre and Marc W. van Iersel
Growth and Morphological Responses of Digitalis and Rudbeckia Seedlings to Supplemental Far-Red LED Light (video hosted by ASHS)
Claudia A. Elkins and Marc W. van Iersel
Effects of Varying Light Intensity on Instantaneous Water Use Efficiency in Lettuce and Petunias (video hosted by ASHS)
Laura E Reese and Marc W. van Iersel
Biomass Allocation in Three Subspecies of Brassica Rapa Grown Hydroponically in a Greenhouse (video hosted by ASHS)
Shane Palmer and Marc W. van Iersel
2018 American Society for Horticultural Science Conference in Washington, DC
Refined spectrum of growing light could improve photosynthetic rate (video hosted by ASHS)
Jun Liu and Marc van Iersel
Night interruption with light emitting diodes applied using simulated moving greenhouse booms promotes flowering of Petunia x hybrida (video hosted by ASHS)
Eric Stallknecht and Marc van Iersel
Longer photoperiods with the same daily light integral increase daily electron transport through photosystem II (video hosted by ASHS)
Claudia Elkins, Michael Martin, and Marc van Iersel
Improved photochemical efficiency of supplemental lighting increases dry mass and leaf size of greenhouse-grown lettuce (video hosted by ASHS)
Geoff Weaver and Marc. van Iersel
Higher daily light integrals with adaptive LED lighting control speed up ornamental seedling growth (video hosted by ASHS)
Theekshana “TC” Jayalath and Marc van Iersel
Effects of Different Photoperiods with Constant Daily Light Integral on Growth and Photosynthesis of Mizuna, Lettuce, and Basil (video hosted by ASHS)
Shane Palmer, Eric Stallknecht, and Marc van Iersel
Invited Apogee Instruments-Campbell Scientific Lecture series at Utah State University
Photosynthetic efficiency: from basic science to practical solutions
Marc van Iersel
2017 American Society for Horticultural Science Conference in Waikoloa, HI
Automated determination and maintenance of optimal light levels for controlled environment agriculture (video hosted by ASHS)
Michael Martin, Erico Mattos, and Marc van Iersel
Identifying the spectral range of far-red light that enhances photochemistry of lettuce grown under different spectra (video hosted by ASHS)
Shuyang Zhen and Marc van Iersel
Using chlorophyll fluorescence data to model efficient lighting strategies for lettuce (video hosted by ASHS)
Geoff Weaver and Marc van Iersel
Morphological and developmental responses of chrysanthemum to night interruption with different red: far-red ratios (video hosted by ASHA)
Eric Stallknecht and Marc van Iersel
Prior presentations
Recovery of Photosynthetic Efficiency at Night: Utilizing Quantum Yield of Photosystem II and Maximum Chlorophyll Fluorescence (video hosted by ASHS)
Michael Martin, Marc W. van Iersel and Sue K. Dove, University of Georgia, Athens, GA
Pulse Width Modulation Control of LEDs Can Maintain Targeted Light Levels (video hosted by ASHS)
David Andrew Gianino and Marc W. van Iersel, University of Georgia, Athens, GA
Continuous Chlorophyll Fluorescence Monitoring of Greenhouse-grown Lettuce (Lactuca sativa L.) (video hosted by ASHS)
Geoffrey Weaver and Marc W. van Iersel, University of Georgia, Athens, GA
Enhancing Photosynthesis with Far-red Light at Different Intensities of Red/Blue or Warm White LED Light (video hosted by ASHA)
Shuyang Zhen, University of Georgia, Athens, GA, United States and Marc W. van Iersel, University of Georgia, Athens, GA
A Biofeedback System for Plant-driven Photosynthetic Lighting (video hosted by ASHA)
Marc W. van Iersel, Rhuanito S. Ferrarezi, Geoff Weaver and Erico Mattos, (1)University of Georgia, Athens, GA, (2)PhytoSynthetix, Athens, GA
Chlorophyll Fluorescence Measurements Can Indicate Carbon Fixation Rates of Lettuce (video hosted by ASHA)
Geoffrey Weaver, Marc W. van Iersel, Erico Mattos and Rhuanito S. Ferrarezi, (1)University of Georgia, Athens, GA, (2)PhytoSynthetix, Athens, GA
Chlorophyll fluorescence as a tool for biofeedback control of photosynthetic lighting
Marc W. van Iersel presentation at Cornell University School of Integrative Plant Science, Nov 3, 2015
Biofeedback
Marc W. van Iersel, 2014
Lighting Up Indoor Farming
Erico Mattos, TEDxPeachtree, 2014
Chlorophyll Fluorescence of Three Species with Different Light Requirements: A Tool to Optimize Supplemental Lighting Efficiency? (video hosted by ASHS)
Shuyang Zhen, Marc van Iersel, Ph.D Professor and Rhuanito Soranz Ferrarezi, University of Georgia, Athens, GA