Microalga Biofertilizer Triggers Metabolic Changes Improving Onion Growth and Yield

Seeking the development of nature-friendly agronomic techniques, use natural sources to promote plant growth and increase agricultural yield has gained relevance. In this context, biofertilizers or biostimulants obtained from microalgae been studied, as these microorganisms have in their composition a great diversity bioactive molecules. This study aimed evaluate effect microalga Asterarcys quadricellulare (CCAP 294/1) on organic onion production, verifying its action metabolism, two cultivars. Thus, experiments were carried out: (i) foliar applications plants grown pots greenhouse; (ii) field-grown under an system. Both undertaken using solutions with spray-dried biomass at concentrations 0.05, 0.15, 0.25 0.4 g L−1. Biometric variables, bulbs biochemical variables evaluated indicating that A. promoted increases bulb caliber both The stimulated metabolism by contents chlorophyll, carotenoids, amino acids, nitrate reductase enzyme activity leaves, also free acids total sugar bulbs, highlighting concentration