A5088747633- Greenhouse Technology and Climate Control
- Light effects on plants
- Plant Physiology and Cultivation Studies
- Leaf Properties and Growth Measurement
- Plant Water Relations and Carbon Dynamics
- Plant Molecular Biology Research
- Postharvest Quality and Shelf Life Management
- Plant responses to elevated CO2
- Photosynthetic Processes and Mechanisms
- Plant nutrient uptake and metabolism
- Horticultural and Viticultural Research
- Flowering Plant Growth and Cultivation
- Plant Stress Responses and Tolerance
- Innovations in Aquaponics and Hydroponics Systems
- Energy, Environment, Agriculture Analysis
- Irrigation Practices and Water Management
- Fungal Plant Pathogen Control
- Growth and nutrition in plants
- Potato Plant Research
- Bioenergy crop production and management
- Plant and animal studies
- Composting and Vermicomposting Techniques
- Tree Root and Stability Studies
- Crop Yield and Soil Fertility
- Remote Sensing in Agriculture
Wageningen University & Research
2016-2025
Graduate School Experimental Plant Sciences
1988-2024
Research International (United States)
2021
University of Bologna
2020
Institute of Automation
2012
China Agricultural University
2012
Chinese Academy of Sciences
2012
C.T. de Wit Graduate School for Production Ecology and Resource Conservation
2012
Centro de Edafología y Biología Aplicada del Segura
2007
Universitat de Lleida
2003
Dry matter partitioning is the end result of flow assimilates from source organs via a transport path to sink organs. The dry among sinks plant primarily regulated by themselves. effect strength on often not direct one, but indirect formation Although translocation rate may depend path, only minor importance for regulation at whole level. To understand sinks, parameter like needed that describes sink's ability influence assimilate import and independent rest plant. term can be defined as...
Background and AimsManipulation of plant structure can strongly affect light distribution in the canopy photosynthesis. The aim this paper is to find a ideotype for optimization absorption Using static functional structural model (FSPM), range different architectural characteristics was tested two seasons order optimal architecture with respect
Indoor plant cultivation can result in significantly improved resource use efficiency (surface, water, and nutrients) as compared to traditional growing systems, but illumination costs are still high. LEDs (light emitting diodes) gaining attention for indoor because of their ability provide light different spectra. In the spectrum, red blue regions often considered major plants' energy sources photosynthetic CO2 assimilation. This study aims at identifying role played by red:blue (R:B) ratio...
Shading by sunlit leaves causes a low red (R) to far-red (FR) ratio that results in phytochrome stationary state (PSS). A PSS induces an array of shade avoidance responses influence plant architecture and development. It has often been suggested this architectural response is advantageous for growth due its positive effect on light interception. In contrast sunlight, artificial sources such as LEDs lack FR, resulting value higher than solar (~0.70). The aim study was investigate how values...
Abstract LED lighting in indoor farming systems allows to modulate the spectrum fit plant needs. Red (R) and blue (B) lights are often used, being highly active for photosynthesis. The effect of R B spectral components on lettuce physiology biochemistry resource use efficiency were studied. Five red:blue (RB) ratios (0.5-1-2-3-4) supplied by a fluorescent control (RB = 1) tested six experiments controlled conditions (PPFD 215 μmol m −2 s −1 , daylength 16 h). increased yield (1.6 folds)...
Source strength (assimilate supply) and sink demand) of the plant were varied in different ways to investigate what extent flower/fruit abortion sweet pepper (Capsicum annuum L.) is determined by availability assimilates. was changing light level, density, leaf pruning. Sink temperature number position earlier formed fruits. Shading as well heating for short periods showed that flowers/fruits most susceptible during first week after anthesis. The experiments where source all when decreased,...
Plants use diffuse light more efficiently than direct light. However, experimental comparisons between and have been obscured by co-occurring differences in environmental conditions (e.g. intensity). This study aims to analyse the factors that contribute an increase crop photosynthesis quantify their relative contribution under different levels of diffuseness at similar intensities. The hypothesis is enhancement results not only from effects uniform vertical horizontal distribution canopy,...
At present most process-based models and the majority of three-dimensional include simplifications plant architecture that can compromise accuracy light interception simulations and, accordingly, canopy photosynthesis. The aim this paper is to analyse heterogeneity an explicitly described tomato in relation temporal dynamics horizontal vertical distribution photosynthesis under direct- diffuse-light conditions. Detailed measurements architecture, leaf were carried out on a crop. These data...
Greenhouse crop production in northern countries often relies heavily on supplemental lighting for year-round yield and product quality. Among the different spectra used lighting, red is considered most efficient, but plants do not develop normally when grown solely under monochromatic light ("red syndrome"). Addition of blue has been shown to aid normal development, typical greenhouse include a mixture light. However, it unclear whether sunlight, as part available greenhouse, may be...
SummaryThe closed greenhouse is a recent innovation in the horticulture industry. Cooling by ventilation replaced partly (in semi-closed greenhouses) or completely mechanical cooling. Excess solar energy collected and stored to be reused heat greenhouse. In temperate climates, this concept combines improved crop production with savings. This paper presents an overview of climate, growth development, yield greenhouses. The technical principles are described macroclimate microclimate arising...
Greenhouses in high latitudes consume vast amounts of energy for heating and supplemental lighting. Light emitting diodes (LEDs) have been suggested as having great potential reducing greenhouse use, they are extremely efficient at converting electricity to light. However, LEDs emit very little heat, which must be compensated by the system. Thus, it is unclear how much can saved when need extra taken into account. This study presents a first analysis demands greenhouses transitioning from...
Abstract A better understanding of the metabolic and diffusional limitations photosynthesis in fluctuating irradiance can help identify targets for improving crop yields. We used different genotypes Arabidopsis thaliana to characterise importance Rubisco activase (Rca), stomatal conductance (g s ), non-photochemical quenching chlorophyll fluorescence (NPQ) sucrose phosphate synthase (SPS) on irradiance. Leaf gas exchange were measured leaves exposed stepwise increases decreases rwt43 , which...
Plants depend on photosynthesis for growth. In nature, factors such as temperature, humidity, CO2 partial pressure, and spectrum intensity of irradiance often fluctuate. Whereas is most influential has been studied in detail, understanding interactions with other lacking.We tested how photosynthetic induction after dark-light transitions was affected by pressure (20, 40, 80 Pa), leaf temperatures (15·5, 22·8, 30·5 °C), leaf-to-air vapour deficits (VPDleaf-air; 0·5, 0·8, 1·6, 2·3 kPa) blue...
Far-red (FR) light promotes fruit growth by increasing dry mass partitioning to fruits, but the mechanism behind this is unknown. We hypothesise that it due an increased sink strength as FR radiation enhances sugar transportation and metabolism. Tomato plants were grown with or without 50-80 μmol m-2 s-1 of added a common background 150-170 red + blue light-emitting diode lighting. Potential growth, achieved pruning each truss one remaining fruit, was measured quantify strength. Model...
The economic viability and energy use of vertical farms strongly depend on the efficiency light. Increasing far-red radiation (FR, 700–800 nm) relative to photosynthetically active (PAR, 400–700 may induce shade avoidance responses including stem elongation leaf expansion, which would benefit light interception, FR might even be when used in combination with PAR. aims this study are investigate interaction between planting density quantify underlying components effects growth. Lettuce (...