Impacts of osmopriming on mitigation of the negative effects of salinity and water stress in seed germination of the aromatic plant Lavandula stoechas L.

Polyethylene Glycol Priming Enhances the Seed Germination and Seedling Growth of Scutellaria baicalensis Georgi under Salt Stress

“…In the presented study, salt stress significantly inhibited the seed germination and seedling growth of S. baicalensis , regardless of whether the seeds were primed or not. This is in agreement with the other studies that demonstrated negative effects of salt stress on plant growth [ 14 , 24 ]. PEG priming showed significantly enhanced seed germination rate and seedling growth of S. baicalensis under salt stress, certificating the positive role of seed priming in plant response to environmental stress.…”

“…Seed priming is a pre-sowing treatment measure that involves initially controlling the water absorption of seeds and finally re-drying them [ 11 ]. And mounting evidence has shown that primed seeds are stronger than unprimed seeds in abiotic stresses [ 12 , 13 , 14 ]. Some chemical agents, such as phytohormones, reactive chemical species (H 2 O 2 and NO), osmolytes, and nanoparticles, act in seed priming [ 15 , 16 ].…”

“…Therefore, it is necessary to choose an optimal agent and the concentration for a certain crop in seed priming. Benadjaoud et al [ 14 ] reported that 4% potassium chloride used in butterfly-lavender seed priming dramatically mitigated the negative impacts of salt or drought stress on germination.…”

Production of watermelon seedlings in different substrates under salt stress

“…According to the regression analysis in Figure 2B, the emergence speed index was reduced by 9.68% between the extreme salinity levels (0.5 and 4.5 dS m -1 ), with a reduction of 2.48% per unit increment in electrical conductivity of water. These results may be related to reduced water potential, which reduces the absorption of water by the seeds, or ion toxicity, as such factors together inhibit germination and consequent emergence when plants are irrigated with saline solutions (Benadjaoud et al, 2022;Semedo et al, 2022).…”

“…According to Table 2, the formulation of the substrate from bovine manure provided a longer mean time of emergence (5.90 days) compared to biochar present in the composition (4.84 days). This effect of bovine manure may be related to the higher ECse of the substrate (1.34 dS m -1 -Table 1), i.e., the increased concentration of soluble salts results in a lower osmotic potential of the solution, influencing lower water availability and imbalance in water uptake by seeds (Freire et al, 2018;Silva Junior et al, 2020;Benadjaoud et al, 2022).…”