EXPLORATION OF DIVERSE EFFECTS OF TRYPTAMINE CONCENTRATIONS ON MAIZE GROWTH

Abstract

This study investigates the impact of varying tryptamine concentrations on the growth and physiological development of maize (Zea mays), with a focus on optimizing its potential as a plant growth stimulant. Tryptamine, a naturally occurring plant metabolite, was applied in concentrations ranging from 10⁻¹ to 10⁻⁵ ppm, alongside a control group (0 ppm), to assess its influence on key growth parameters. Evaluated metrics included root length (RL), shoot length (SL), root fresh weight (RFW), root dry weight (RDW), shoot fresh weight (SFW), shoot dry weight (SDW), chlorophyll a (Chl a), and chlorophyll b (Chl b). The results demonstrated a concentration-dependent response. Tryptamine concentrations of 10⁻¹ and 10⁻² ppm significantly enhanced maize growth, with root and shoot lengths increasing by 28% and 24%, respectively, compared to the control. Biomass accumulation was also higher, with RDW and SDW improving by 21% and 18%. Furthermore, chlorophyll content increased markedly, with Chl a and Chl b levels rising by 20–25%, indicating improved photosynthetic efficiency and overall plant vigor. In contrast, lower concentrations (10⁻³ to 10⁻⁵ ppm) produced diminishing effects, suggesting that tryptamine's growth-promoting properties are most effective within a specific dosage range. No toxic symptoms were observed at any concentration, supporting its potential as a safe biostimulant. This study provides valuable insights into the agronomic application of tryptamine for enhancing maize productivity. It emphasizes the importance of dosage optimization and supports further exploration into the use of plant-derived compounds for sustainable crop improvement strategies.