Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/409
Title: Innovative optical method for sensing the nutritional stress in hydroponically cultivated plants
Authors: Miletić, Katarina 
Djunisijevic-Bojovic, Danijela M.
Kasalica, Bećko 
Milutinovic, Marijana
Petković, M. 
Milanovic, Slobodan D.
Belča, Ivan 
Sarvan, Mirjana 
Jeremic, Dejan A.
Keywords: 665 nm red LED;Circadian rhythm;Leaf transmittance;nutrient deficiency;Ocimum basilicum;plant monitoring
Issue Date: 1-Jan-2022
Journal: Acta Agriculturae Scandinavica Section B: Soil and Plant Science
Abstract: 
Well-balanced nutrition is important for the successful cultivation of healthy plants. In this paper, we demonstrate a nondestructive optical method that can sense a deficiency of certain nutrients. The setup was tested on hydroponically grown Ocimum basilicum. The plants were subjected to nutrient deficiency by the exclusion of one of the essential elements (Fe, Mg, P, N) from the hydroponic solution. A control group of plants, fed by the balanced hydroponic solution, was also grown under the same conditions. The proposed method tracks and records the optical transmittance of the plants' leaves. All groups exhibit clearly defined day-night Circadian rhythms. When compared to the control group, the treated plants exhibited modified circadian rhythms of the optical transmission, suggesting an early indicator of the plants' stress. The condition of the plants under test was also assessed by the more common (destructive) methods such as: measurements of the determination of the photosynthetic pigment content, dray weight determination and the efficiency of PSII. Several biological parameters were observed, calculated and compared to the graphs of optical transmission dependence in real time. Presented results have demonstrated a significant potential of the proposed optical method for the early detection of plants' stress in hydroponic cultivation.
URI: https://physrep.ff.bg.ac.rs/handle/123456789/409
ISSN: 0906-4710
DOI: 10.1080/09064710.2022.2071761
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