ASSESSMENT OF THE DROUGHT RESISTANCE OF PAIZA BY SEED SWELLING UNDER OSMOTIC STRESS
2023
Rodina, T. V. | A. A. Astashov | Safronov, A. A.
The article presents the features of the swelling of paisa seeds in solutions of osmotic agents (sucrose and potassium nitrate) in comparison with the control variant (distilled water). Paisa samples, characterized by relative drought resistance under conditions of artificially simulated stress, should be used in breeding new varieties with high adaptive potential, adapted to cultivation in arid regions of the Russian Federation. On average, over a three-year period of research, a significant effect of the paisa genotype, the conditions of the year and the duration of the experiment on the intensity of seed swelling in hypertonic solutions and distilled water was established by a multivariate analysis of variance. The processes of water absorption by the seeds of all the studied samples were characterized by varying degrees of intensity: in the first 1-2 hours and the last 24-48 hours of the experiment, the seeds swelled more intensively; in the time interval of 4-6 hours, the rate of water absorption did not change significantly. Paisa varieties - Oda, Udalaya, Evrika - are classified as relatively drought-resistant. The most intense swelling was found in paisa seeds in a laboratory experiment in 2023 – 140.1%. In addition, in most of the studied varieties of paisa, both on average over the years of study and over the years of research, the swelling of seeds decreased in a hypertonic solution of potassium nitrate, which may indicate a specific effect of the solution
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