لخّصلي

Rice (Oryza sativa, L.) is one of the strategic crops worldwide, and improvement of its productivity is an essential requirement to ensure food security.Therefore, the study's objective was to investigate the importance of metabolic, morphological, and phenotypic plasticity parameters for water stress tolerance in different rice varieties and exogenous application of different nutrients either alone or in combination.Although the internal resistance of the plants to water shortage, the harmful effects of drought can be reduced by providing adequate and balanced supplies of mineral nutrients.Under low soil nutrient concentrations, plants have to absorb more water to be able to absorb the same amount of mineral nutrients for their metabolism as they would get from soils of satisfactory fertility.Water deficiency greatly affects the uptake of nutrients by the roots and their movement towards the shoots, which is why rice growth often does not respond to nutrient inputs.These nutrients are integral components of organic compounds such as amino acids, nucleic acids, phospholipids, and proteins.Drought stress leads to reduced transpiration flow due to interference with absorption and discharge mechanisms which may result in reduced nutrient uptake.Optimal nutrition greatly influences water circulation within plants, which is a very effective way to combat water deficit.It is worth mentioning that recently released water stress-tolerant rice varieties may respond better to nutrient inputs, and growth and yield may be enhanced under water stress, compared to susceptible varieties.Sustainable production in drought-affected areas can only be achieved through developing drought-tolerant varieties.Therefore, plant nutrients such as phosphorus, potassium, calcium, magnesium, etc.

Rice (Oryza sativa, L.) is one of the strategic crops worldwide, and improvement of its productivity is an essential requirement to ensure food security. Ongoing process of climate changes and Water shortage is a main abiotic stressor, especially for rice cultivation, . The most critical stage in crop growth for any stress, whether biotic or abiotic, is the reproductive stage, so a drought at this stage may be harmful and lead to crop decrease. Research has shown that in addition to using tolerant varieties, the application of nutrients also helped rice plants overcome water shortage and its subsequent effects. Sustainable production in drought-affected areas can only be achieved through developing drought-tolerant varieties. Even if These varieties are high yielding but are highly susceptible to water shortage. Although the internal resistance of the plants to water shortage, the harmful effects of drought can be reduced by providing adequate and balanced supplies of mineral nutrients. Growing evidence suggests that the mineral nutrient status of plants plays a critical role in increasing plant resistance to water deficit. Water deficiency greatly affects the uptake of nutrients by the roots and their movement towards the shoots, which is why rice growth often does not respond to nutrient inputs. Drought stress leads to reduced transpiration flow due to interference with absorption and discharge mechanisms which may result in reduced nutrient uptake. Optimal nutrition greatly influences water circulation within plants, which is a very effective way to combat water deficit. Under low soil nutrient concentrations, plants have to absorb more water to be able to absorb the same amount of mineral nutrients for their metabolism as they would get from soils of satisfactory fertility. Therefore, plant nutrients such as phosphorus, potassium, calcium, magnesium, etc. are essential for plant growth, metabolism, and reproduction. These nutrients are integral components of organic compounds such as amino acids, nucleic acids, phospholipids, and proteins. However, rice genes may differ in their response to mineral nutrition under water stress. It is worth mentioning that recently released water stress-tolerant rice varieties may respond better to nutrient inputs, and growth and yield may be enhanced under water stress, compared to susceptible varieties. The study was planned on the premise that intrinsic tolerance combined with exogenous nutrient application can improve plant performance under water stress conditions. Therefore, the study's objective was to investigate the importance of metabolic, morphological, and phenotypic plasticity parameters for water stress tolerance in different rice varieties and exogenous application of different nutrients either alone or in combination.