TY - JOUR AU - González F., Harold AU - Fuentes M., Natalia PY - 2017/06/12 Y2 - 2024/03/29 TI - Action mechanism of five microorganism promoters of plan growth JF - Revista de Ciencias Agrícolas JA - rcia VL - 34 IS - 1 SE - Research Article DO - 10.22267/rcia.173401.60 UR - https://revistas.udenar.edu.co/index.php/rfacia/article/view/3416 SP - 17-31 AB - <p>The indiscriminate use of agrochemicals to increase crop productivity is not an environmentally friendly practice. As a strategy to replace the use of agricultural chemicals, we propose the use of bioinoculation of plant growth-promoting microorganisms. In this context, the objective of this research was to evaluate the effect of five plant growth-promoting microorganism strains on six plants. A fungus (<em>Trichoderma harzianum</em>) and a group of bacteria (Enterobacter aerogenes, <em>Azotobacter</em> sp., <em>Bacillus mycoides</em> and <em>Microbacterium</em> sp.) were selected to evaluate the effect of germination, growth and assimilation in cassava (Manihot esculenta), rice (<em>Oryza  sativa</em>),  sunflower  (<em>Helianthus  annuus</em>),  peas (<em>Pisum sativum</em> L.), lettuce  (<em>Lactuca  sativa</em> L.), and papaya (<em>Carica papaya</em> L.). Bioassays included 18 pots per plant species, and each treatment was replicated three, including the control. The inoculum was prepared by seeding 200mL of nutrient broth with an aliquot of each microorganism, then, adding 20mL of inoculum to each pot per treatment. The following variables were evaluated: root number and length, leaves and stems, leaf area, and root and stem biomass. The bioinoculation of <em>Microbacterium</em> sp. and B. <em>mycoides</em> accelerated plant germination regardless of the species. The treatments with <em>Azotobacter</em> sp., T. <em>harzianum</em> and E. <em>aerogenes</em> were not effective in cassava and rice crops. The bioinoculation of <em>Microbacterium</em> sp., B. <em>mycoides</em> and E. <em>aerogenes </em>favored growth, development and yield in rice and pea crops.</p> ER -