Abstract
Analysis of the physiological characteristics of plants is important because the analysis includes various observations, calculations, as well as the varying relationships between plant growth and development processes and their results. The purpose of this study was to analyse the physiological characters of two shallot varieties at various watering frequencies. The research design used was a randomized block design with 2 factors, namely shallot varieties (Medan and Bima Brebes) and the frequency of watering (intervals of 1 once a day, once every 3 days, once every 5 days and every 7 days) located in the Greenhouse and Tissue Culture Laboratory of the Faculty of Agriculture, Universitas Sumatera Utara in May - September 2019. The results indicated that the Bima Brebes variety produced the highest total chlorophyll, which was significantly different from the Medan variety. The leaves relative water content was not significantly different in the two shallot varieties tested by watering frequency treatment. Watering once in 5 days produced the lowest hydrogen peroxide but produced the highest ascorbate peroxidase enzyme. The activity of the ascorbate peroxidase enzyme was significantly different and had the highest value in the Medan variety, watered with a frequency of once in 5 days.
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