Remote detection of light tolerance in Basil through frequency and transient analysis of light induced fluorescence
Journal article, 2016

© 2016 Elsevier B.V.Artificial lighting control in industrial scale greenhouses has a large potential for increased crop yields, energy savings and timing in greenhouse production. One key component in controlling greenhouse lighting is continuous and accurate measurement of plant performance. This paper presents a novel concept for remote detection of plant performance based on the dynamics of chlorophyll fluorescence (CF) signals induced by a LED-lamp. The dynamic properties of the CF is studied through fitting a linear dynamic model to CF data. The hypothesis is that changes in photochemistry affects the fluorescence dynamics and can therefore be detected as changes in the model parameters and properties. The dynamics was studied in experiments using a sinusoidal varying light intensity (period 60 s) or step changes (step length 300 s). Experiments were performed in a controlled light environment on Basil plants acclimated to different light intensities. It is concluded that the capacity to use a certain light intensity is reflected by how fast and how complex the dynamics are. In particular, the results show that optimal model order is a potential indicator of light tolerance in plants that could be a valuable feedback signal for lighting control in greenhouses.

Stress detection

Photosynthesis dynamics

System identification

Fluorescence transient

Greenhouse illumination control

Chlorophyll fluorescence

Author

Anna-Maria Carstensen

Chalmers, Signals and Systems, Systems and control, Automatic Control

T. Pocock

Rensselaer Polytechnic Institute

Daniel Bånkestad

Torsten Wik

Chalmers, Signals and Systems, Systems and control, Automatic Control

Computers and Electronics in Agriculture

0168-1699 (ISSN)

Vol. 127 289-301

Driving Forces

Sustainable development

Areas of Advance

Energy

Life Science Engineering (2010-2018)

Subject Categories

Horticulture

Control Engineering

DOI

10.1016/j.compag.2016.06.002

More information

Created

10/8/2017