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Abstract

Charles Darwin was the first to identify plant hormones and published the book The Power of Movement in Plants. Later, many scientists continued his work and identified a wide range of plant hormones and their effects on plant growth. Limited food resources are a major concern in the present century. Climate change causes water stress in many plants, and plant hormones, such as abscisic acid (ABA), play a key role. Drawing on experience in the teaching of biology and phytology at the university, the authors extensively studied the effects of human hormones on the lifecycle of plants (the cherry tomato as the first plant). These hormones were used at four concentrations of 0.01, 0.1, 1.0, and 10 mg/l in water. It was found that glucagon at 10 mg/l under water stress increased sucrose content from 0.8 to 1.6 g/100 g. It also significantly enhanced the activity of catalase, polyphenol oxidase, and lipase enzymes. Glucagon shortened the germination period by 2 days relative to the control sample. Angiotensin II at 10 mg/l had a significant effect under water stress on the cherry tomato. Cortisol at 10 mg/l significantly increased the protein content from 0.2 to 1.4 g/100 g under water stress. Moreover, superoxide dismutase, catalase, and ascorbate peroxidase increased, improving the growth index and the seedling length compared to the control sample‎.