Informatics Publishing Limited

M. Teuma Mbezi ¹, H. P. Ekobena Fouda ¹, Ambang Zachee ², C. B. Tabi ¹, T. C. Kofane ¹

Affiliations
1 Department of Physics, University of Yaounde I, P.O. Box 812, Yaounde, CM
2 Department of Biology and Vegetal Physiology, University of Yaounde I, P.O. Box 812, Yaounde, CM

Abstract

Objective: To propose a method of electric detection of a biotic stress before the visible apparition of the symptoms on the plant leaflets. Methods/ Statistical Analysis: By using Cole’s model of cell, we study the behavior of extra-cellular space resistance according to time of four groups of tomato leaflets and make comparison of those different behaviors. Findings: It appears from our analysis that the maxima of resistances leaflets which are infected by mildew and not treated increases gradually and tends to infinity. The infected plants (sick) and treated with the ridomil MC have a relatively low electric resistance level compared to that obtained in the infected and untreated plants. Whether the plants are infected, infected and treated, or healthy and treated; the maxima of resistances were higher than those in pilot plants (untreated and uninfected). The data shows that the disease destroys continuously the physiological state of the plant until death, which corresponds to the higher values of the extra-cellular space resistance peak; the fighting of fungicide against the disease within the plant organism has an impact on the physiological state of the plant which is revealed by the decrease of the extra-cellular space resistance peak. Application/ Improvements: The objective being to contribute in obtaining a bank of numerical resistance values allowing improving the symptomatic methods of detection of the sick plants by the seeing and by the chemical analyses.

Keywords

Electrical Resistance, Fungicide, Mildew, Physiological State, Ridomil M.C. Cole’s Model of Cell, Tomato

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M. Teuma Mbezi ¹, Ambang Zachee ², C. B. Tabi ¹, H. Ekobena Fouda ¹, T. C. Kofane ³

Affiliations
1 Laboratory of Biophysics, Department of Physics, Faculty of Sciences, University of YaoundeI, Yaounde, CM
2 Laboratory of Phytopathology, Department of Biology and Vegetal Physiology, Faculty of Sciences, University of Yaounde I, Yaounde, CM
3 Laboratory of Mechanics, Department of Physics, Faculty of Sciences, University of Yaounde I, Yaounde, CM

Abstract

Objective: Our purpose is to study the stochastic electrical behavior of Splina liquid chlorophyll by using the T. E.-model and to compare it with the natural one. Methods/Statistical Analysis: The technic and method employed consisted of modeling the chlorophyll as an electrical circuit, to make a statistical analysis of the extra chlorophyll space resistance process of Splina solution in light and in darkness by evaluating, the statistical average and statistical autocorrelation function, and make a temporal analysis by evaluating, the temporal average and temporal autocorrelation function. Findings: It comes out from our study that, for a suitable lighting angle, and repartition of Splina solution component, after adding of purified water, RO-EDI (Reverse Osomosis-Electrode Ionization) water and sodium copper chlorophyll in to the natural chlorophyll, the electric behavior of Splina chlorophyll solution is like the natural one. For the three different disposition of liquid chlorophyll glass, the Spectral Density of Power (DSP) of the extra-chlorophyll space resistance process R(ω,t) when the splina solution is under light is up to the DSP of the signal when the splina solution is under darkness for the whole value of the reduced normalized frequency; the process is non-statistics in the broad sense (SSL) and non ergotic. The resemblance of the flow charge with him for different value of the shift parameter is high in light than in darkness. Application/Improvements: This study provided an additional tool to verify if after the addition of new substances, that the photoelectric, statistical and temporal behavior of the resulting product is identical to that of the initial natural one.

Keywords

Stochastic Process, Statistics in the Broad Sense (SSL), Ergotic, Chlorophyll, Splina, Spectral Density of Power (DSP)

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