Daily monitoring of the biopotential of wheat seedlings as a means of increasing the assessment of plant stress resistance

Abstract

The results of studying the process of changing the biopotential of wheat seedlings of the Novosibirskaya 41 variety when exposed to elevated (43 °C) and reduced (8 °C) temperatures are presented. The experiments took place in 2020 and 2022. The automated system "AutoExpI" was used in the research. The data on the dynamics of plant biopotential resulting from identical temperature changes in the environment when the age of seedlings changes were obtained. The mean absolute maximum centered values (U max c) of the biopotential of seedlings aged 10 to 19 days when exposed to elevated and reduced temperatures in 2020 and 2022 were statistically analyzed using Statistica 6 software (Statistica 6). The regression relationships determined during the regression analysis of the biopotential indices under the action of elevated temperature are described with respect to the age of seedlings by second-order polynomials with correlation coefficient R = 0.997 at p = 0.072 for the results of the experimental studies in 2020 and R = 0.986 at p = 0.028 for the data for 2022. For the effect of reduced temperature, quadratic regression relationships were also obtained with a correlation coefficient of R = 0.995 at p = 0.1023 for the 2020 experimental results and R = 0.9998 at p = 0.00023 for the 2022 data. The closeness of the graphical representation of similar regression dependencies was noted, on the basis of which the algorithm was determined and expressions for correction of experimental data obtained in the process of prolonged experimental studies were obtained.