Physiological character analysis of two shallot varieties at various watering frequencies

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.

Improvement in physio-biochemical characteristics of shallot plants with nano silica at several levels of drought stress

“…Shallots planted at optimal soil water content (80% field capacity) produce lower peroxide than those under drought conditions (40% field capacity). The research results of [10] also showed that watering shallot plants every 5 days caused the H2O2 formed to increase significantly compared to watering water carried out every day. [11] stated that ROS production increased several times under water stress conditions.…”

“…Even though H2O2 is not as reactive as superoxide, it is still in the form of free radicals which are unstable and dangerous for plants in plant metabolism. In organisms, H2O2 and other superoxides will be converted into oxygen and water by SOD [10].…”

The Effect of Watering Techniques for Increasing the Yield of Shallots (Allium cepa L) in Dry Land

“…The frequency of watering was significantly different on the parameter of hydrogen peroxide produced by the highest shallot. The frequency of watering once every 5 days resulted in the highest ascorbate peroxidase enzyme activity and was significantly different from other treatments [23]. Enzymes are a form of plant defense to maintain a complex system of several types of antioxidants that arise when plants experience environmental stress.…”