Production of Physalis peruviana L. has gained prominence in Northeastern Brazil. However, salinity limits the crop development in the Brazilian semiarid. Thus, this research aimed to evaluate the application of Acadian® biostimulant as mitigant of the deleterious effects of salinity on growth and gas exchange of P. peruviana plants. The experiment was combining different electrical conductivity of irrigation water (0.50, 1.23, 3.00, 4.44, and 5.50 dS m⁻¹) and biostimulant doses (0.00, 1.45, 5.00, 8.55, and 10.00 mL L⁻¹). The main variables evaluated were plant height, stem diameter, number of leaves, root length, leaf area, specific leaf area, leaf area ratio, absolute and relative growth rate for plant height, and gas exchange. Experimental results showed that an increase in electrical conductivity of irrigation water had negatively affected the growth components and gas exchange in P. peruviana. Also, the application of seaweed-based biostimulant improves the photosynthetic capacity (43.3%), reduces transpiration rate (26.5%) and water loss by this process, further it attenuated the deleterious effects of salinity on specific leaf area, leaf area ratio, and stomatal conductance. To further elucidate the effectiveness of biostimulant application as a mitigant of salt stress, research aimed at the biochemical and enzyme activities of the plant's antioxidant system should be conducted to better understand this process.

Physalis peruviana L.的生产在巴西东北部获得了突出地位。然而，盐度限制了巴西半干旱地区的作物生长。因此，本研究旨在评估 Acadian® 生物刺激素作为减轻盐度对秘鲁青蒿植物生长和气体交换的有害影响的应用。该实验结合了灌溉水的不同电导率（0.50、1.23、3.00、4.44 和 5.50 dS m ^-1）和生物刺激剂剂量（0.00、1.45、5.00、8.55 和 10.00 mL L ^-1）。评估的主要变量是株高、茎粗、叶数、根长、叶面积、比叶面积、叶面积比、株高的绝对和相对生长速率以及气体交换。实验结果表明，灌溉水电导率的增加对P. peruviana的生长成分和气体交换产生了负面影响. 此外，海藻类生物刺激素的应用提高了光合能力（43.3%），减少了蒸腾速率（26.5%）和水分流失，进一步减弱了盐度对比叶面积、叶面积比和气孔导度。为了进一步阐明生物刺激剂作为盐胁迫缓解剂的有效性，应开展针对植物抗氧化系统的生化和酶活性的研究，以更好地了解这一过程。