Physiology and nutritional contents of lettuce (Lactuca sativa L.) plants induced by Pseudomonas fluorescens / Fisiologia e conteúdo nutricional de plantas de alface (Lactuca sativa L.) induzidas por Pseudomonas fluorescensv
DOI:
https://doi.org/10.34117/bjdv5n9-134Keywords:
rhizobacteria. Biostimulants. growth. SynergismAbstract
Sustainable agriculture and the larger scales of production needed to meet the higher demand for food each year have become models for several studies; beneficial microorganisms are one model that has been used as an alternative for greater production of and reductions in the use of chemical fertilizers. Thus, the objective of this work was to study the physiological changes in and nutrient contents of lettuce after inoculation with Pseudomonas fluorescens in combination with chemical fertilization. P. fluorescens had a positive influence on gas exchange, with increases of 41% in A, 44% in Gs, 29% in E, and 100% in A / Ci; increased Concentration of chlorophyll a and b, of 220% more chl a and 106% chl b; increased chlorophyll a fluorescence, higher relative water content; and nutrient content increases of 19% for nitrogen, 24% for phosphorus, and 105% for potassium. Plants inoculated with BRM-32111 presented increases for MFT, MFC and FF, in 37%, 34% and 26% respectively. However, when combined with fertilization, antagonism occurred, and the evaluated parameters were negatively affected.References
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