| Autor: |
Sousa VFO; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Santos AS; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Sales WS; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Silva AJ; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Gomes FAL; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Dias TJ; Universidade Federal da Paraíba-UFPB, Centro de Ciências Humanas, Sociais e Agrárias, Departamento de Agricultura, Bananeiras, PB, Brasil., Gonçalves-Neto AC; Universidade Federal da Paraíba-UFPB, Centro de Ciências Humanas, Sociais e Agrárias, Departamento de Agricultura, Bananeiras, PB, Brasil., Faraz A; Glocal University-GU, School of Life and Allied Health Sciences, Departament Life Sciences, Saharanpur, UP, Índia., Santos JPO; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Santos GL; Universidade Federal Rural do Semi-Árido-UFERSA, Centro de Ciências Agrárias, Departamento de Ciências Agronômicas e Florestais, Mossoró, RN, Brasil., Cruz JMFL; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Silva LDR; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil., Araújo JRES; Universidade Federal da Paraíba-UFPB, Centro de Ciências Agrárias, Departamento de Ciências Agrárias e Ambientais, Areia, PB, Brasil. |
| Abstrakt: |
Under salt stress conditions, plant growth is reduced due to osmotic, nutritional and oxidative imbalance. However, salicylic acid acts in the mitigation of this abiotic stress by promoting an increase in growth, photosynthesis, nitrogen metabolism, synthesis of osmoregulators and antioxidant enzymes. In this context, the objective was to evaluate the effect of salicylic acid doses on the growth and physiological changes of eggplant seedlings under salt stress. The experiment was conducted in a greenhouse, where the treatments were distributed in randomized blocks using a central composite matrix Box with five levels of electrical conductivity of irrigation water (CEw) (0.50; 1.08; 2.50; 3.92 and 4.50 dS m-1), associated with five doses of salicylic acid (SA) (0.00; 0.22; 0.75; 1.28 and 1.50 mM), with four repetitions and each plot composed of three plants. At 40 days after sowing, plant height, stem diameter, number of leaves, leaf area, electrolyte leakage, relative water content, and total dry mass were determined. ECw and SA application influenced the growth and physiological changes of eggplant seedlings. Increasing the ECw reduced growth in the absence of SA. Membrane damage with the use of SA remained stable up to 3.9 dS m-1 of ECw. The relative water content independent of the CEw increased with 1.0 mM of SA. The use of SA at the concentration of 1.0 mM mitigated the deleterious effect of salinity on seedling growth up to 2.50 dS m-1 of ECw. |
