Salinity is one of the environmental factors inhibiting productivity in crop plants. Available strategies to mitigate the abiotic stresses are limited. Microalgae and cyanobacteria can mitigate the adverse effects of abiotic stress due to their biostimulant properties. The aim of this work was to study the effect of hydrolysate of the ciyanobacterium Arthrospira platensis on the growth of Petunia plants under salt stress conditions over two growing seasons (winter and spring). Plants were exposed to 2.0, 2.5, and 3.0 dS m⁻¹ EC, with and without application of A. platensis hydrolysate. At the end of the trial, biometric parameters and plant analysis were determined. Petunias had a negative response when the salinity level rose from 2 to 3 dS m⁻¹ and exhibited moderate tolerance to high internal Na and Cl concentrations. Results show that a high salinity reduces the Ca, Mg, K, and S contents in the leaves and provokes a sharp reduction in the K⁺/Na⁺ relationship. Applying A. platensis hydrolysate alleviates the effects of NaCl stress and stimulates shoot and bud formation in the petunia mother plant while inducing flowering in commercial Petunia plants. The A. platensis hydrolysate application increased the K⁺/Na⁺ relationship in treatments with an EC of 3.0 dS m⁻¹.

盐度是抑制农作物生产力的环境因素之一。减轻非生物胁迫的可用策略是有限的。微藻和蓝细菌由于其生物刺激特性，可以减轻非生物胁迫的不利影响。这项工作的目的是研究ciyanobacterium的水解物的作用节旋藻的生长矮牵牛植物盐胁迫条件下，在两个生长季节（冬季和春季）。在有和没有应用白僵菌的情况下，将植物暴露于2.0、2.5和3.0 dS m ^-1 EC下水解物。在试验结束时，确定了生物特征参数和植物分析。当盐度水平从2 dS m ^-1上升到3 dS m ^-1时，矮牵牛具有负响应，并且对高内部Na和Cl浓度表现出中等耐受性。结果表明，高盐度降低了叶片中Ca，Mg，K和S的含量，并引起K ⁺ / Na ⁺关系的急剧降低。应用A.螺旋藻水解物的缓解盐胁迫，刺激芽和芽形成的影响，在矮牵牛母株而诱导开花商业矮牵牛植物。所述A.螺旋藻水解物应用增加K个⁺ /钠EC为3.0 dS m ^-1的治疗中的⁺关系。