An effective strategy to address the impacts of climate change on maize involves early planting, which mitigates drought stress during critical growth phases, preventing yield reductions. The research assessed two maize inbred lines (sensitive and tolerant to low temperature) under conditions of waterlogging stress. This is crucial since early sowing often faces both low temperatures and heavy rain. Morphological, biochemical, and molecular responses were recorded after 24 h, 72 h, and 7 days of stress during the growth stage of 5-day-old seedlings. The findings indicated a more pronounced decline in all morphological characteristics in the sensitive line. Both genotypes displayed an increased root-to-shoot ratio, suggesting that the shoots deteriorate more rapidly than the roots. Physiological evaluations demonstrated that the tolerant line was more effective in managing ROS levels compared to the sensitive line. The involvement of H₂O₂ in aerenchyma formation implies that the decreased POD activity and elevated MDA levels observed after seven days may be associated with aerenchyma development in the tolerant line. Genes essential for PSII function revealed that waterlogging adversely affected photosynthesis in the sensitive genotype. In summary, the low-temperature tolerant genotype exhibited significant resilience to waterlogging, indicating potential interaction between the pathways governing these two abiotic stressors.

The mesic grasslands of the Molinio-Arrhenatheretea Tx. 1937 in Vojvodina could play a crucial role in biodiversity conservation, but also in local economies, providing essential ecosystem services, such as habitats for diverse species and resources for agricultural and pastoral activities. However, they face growing threats from unsustainable land use, urbanization and climate change. In this study, a database comprising 716 relevés and 636 plant species was created. All meadow plots were classified into seven habitat types and evaluated for their sustainable use potential using the index developed in this study, based on economically notable species, their status of protection and total cover. Through this index, moist or wet mesotrophic to eutrophic pasture demonstrates the highest potential, whereas temperate and boreal moist or wet oligotrophic grassland shows the lowest. This index offers a decision-support tool, optimizing economic benefits while minimizing environmental impact and offering guidelines for sustainable grassland management and policy recommendations tailored to local conditions. It also serves as a framework for other regions facing similar challenges, contributing to the advancement of grassland ecosystem service valuation and its preservation.