Vermicompost humates as NaCl-stress mitigator and its effect on the physiological and biochemical characteristics of basil ( Ocimum basilicum L.)

The salinity and drought are abiotic stresses that affect the agriculture which foster growth retardation, physiological abnormalities, and lower production output of field crops throughout the world. Plant responses under salinity conditions is a scientific problem to be explored. The objective of this study was to determine the effect of vermicompost humates as a NaClstress mitigator on photosynthesis, transpiration, water potential and biochemical variables as protein, proline, and total foliar carbohydrates of two basil varieties to elucidate the differential response of both varieties to the NaCl. The experiment was carried out through a completely randomized design with a trifactorial arrangement of 2x3x2, where factor A consisted of two varieties, Napoletano and Sweet Genovese, factor B included three NaCl concentrations (0, 50, and 100 mM), and factor C were one concentration of vermicompost humates (1/60) and distilled water as control, with six replications per treatment. The results showed a differential response among varieties in all variables measured. The vermicompost humates had a bio stimulant and mitigating stress effect on the physiological and biochemical variables. Napoletano is the most tolerant NaClstress variety, exhibiting the highest values in all physiological and biochemical variables.