The objective of this investigation was to evaluate the impact of seed priming with seaweed liquid extracts (SLEs) prepared from three Egyptian seaweeds (Ulva fasciata, Cystoseira compressa, and Laurencia obtusa) in a concentration of 20 g L^-1 on seed germination and seedling growth of Vigna sinensis and Zea mays as well as the effectiveness of these extracts in ameliorating salinity stress. Laurancia extract (LLE) induced the maximum positive response in germination as well as producing the maximum increases in all seedling morphological parameters with percent of response 87.14% for hypocotyl growth of V. sinensis and 85.71% coleoptile elongation of Z. mays. The maximum amylase and protease activities were recorded with LLE priming. Ulva, Cystoseira, Laurencia liquid extract consortium (UCLLE) induced the highest promotion effect for both V. sinensis and Z. mays giving significant increments for all growth criteria, dry biomass 0.301 and 0.438 g seedling^-1, Chl a 18.98 and 13.79 mg g^-1 FW, total carbohydrates 460.88 and 518.14 g seedling^-1, protein 219.72 and 207.49 g seedling^-1 respectively. Seeds primed with UCLLE consortium exhibited remarkable tolerance for salinity stress, meanwhile the highest ameliorating effect was pronounced with 10% SW supplementation. Priming with SLEs enhances the growth of either V. sinensis or Z. mays under salinity stress, whereas UCLLE consortium induced significant increases in biomass 0.231 and 0.379 g seedling^-1, respectively. Seed priming with SLEs enhanced guaiacol peroxidase activity giving the highest value with UCLLE consortium conjugated with 25% SW (12.47 and 13.05 μmol min^-1 g^-1 FW), respectively. Application of Canonical Corresponding analysis (bi-plot) demonstrates a significant correlation between variables of SLEs components and germination indices of the two plants concluding total nitrogen, total phosphorous, potassium, ascorbic acid, and amino acids besides carbohydrate content. Therefore, results maintain the concept of SLEs as agricultural biocatalyst which could be practiced as prospective biostimulants for being feasible, sustainable, eco-friendly, and effective in improving salinity tolerance for some plants.

这项研究的目的是评估使用浓度为20 g L ^-1的三种埃及海藻（Ulva fasciata，Cystoseira compressa和Laurencia obtusa）制备的海藻液体提取物（SLE）引发种子对种子发芽和幼苗的影响。Vigna sinensis和Zea mays的生长以及这些提取物在缓解盐分胁迫方面的功效。Laurancia萃取（LLE）诱导发芽最大正响应，以及与的响应87.14％百分比生产用于胚轴生长在所有幼苗形态参数的最大增加V.吸虫玉米Z胚芽鞘伸长率为85.71％。用LLE引发记录最大的淀粉酶和蛋白酶活性。Ulva，Cystoseira，Laurencia液体提取物联合会（UCLLE）诱导了对中华绒螯蟹和玉米的最高促进作用，使所有生长标准，干燥生物量0.301和0.438 g幼苗^-1，Chl分别为18.98和13.79 mg g ^-1 FW，总碳水化合物460.88和518.14克幼苗^-1，蛋白219.72和207.49克幼苗^-1分别。用UCLLE组合引发的种子对盐分胁迫表现出显着的耐受性，同时添加10％的西南SW可以显着提高其改善效果。用SLEs引发可增强盐胁迫下中华绒螯蟹或玉米的生长，而UCLLE财团分别诱导生物量显着增加0.231和0.379 g幼苗^-1。用SLE引发的种子增强了愈创木酚过氧化物酶的活性，与结合有25％SW的UCLLE财团（12.47和13.05μmolmin ^-1 g ^-1FW）。典范对应分析（双图）的应用证明了SLE成分变量与两株植物的发芽指数之间的显着相关性，除碳水化合物含量外，还包括总氮，总磷，钾，抗坏血酸和氨基酸。因此，结果保持了SLE作为农业生物催化剂的概念，可以将其作为可行的，可持续的，生态友好的和有效的提高某些植物耐盐性的潜在生物刺激剂来实践。