Mathematical model for detecting tomato ripeness using chlorophyll fluorescence
Laen...
Kuupäev
2024
Kättesaadav alates
Autorid
Abdelhamid, M.A.
Rawdhan, S.A.
Shalaby, S.S.
Atia, M.F.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
A precise assessment of tomato ripeness is crucial in the harvesting and marketing
procedures. Chlorophyll fluorescence is being relied on as a harmless approach for tracking the
maturity of tomatoes in postharvest research. In this study, mathematical model is proposed based
on measuring the intensity of fast chlorophyll fluorescence of tomatoes depending on their degree
of maturity. In the experimental study, four stages of tomato ripening (green, turning, pink, and
red) for three varieties (‘Alkazar’, 'Lezginka’, and ‘Rosanchik’) were used. The Fluorescence
Intensity (FI) data over time were represented using a third-degree polynomial function and
finding its first derivative curve. The FI parameter was obtained as the fluorescence level at the
first inflection point on the fluorescence induction curve (at time tI on the first derivative curve).
According to the obtained mathematical models, the optimal time for monitoring the degree of
ripeness of tomatoes was tI = 129 ± 4 ms. According to the results of experimental studies, there
is a general trend, regardless of the variety used, that the FI decreases with tomato maturity. The
FI may assist in sorting and grading processes for fresh vegetables and fruits. It can also be used
as a system that can be integrated into harvest and post-harvest machinery for agricultural
products.
Kirjeldus
Received: October 25th, 2023 ; Accepted: December 12th, 2023 ; Published: January 18th, 2024 ; Correspondence: mahmoudabdelhamid@agr.asu.edu.eg
Märksõnad
tomato, model, maturity stage, fast chlorophyll fluorescence, articles