AVALIAÇÃO DO EFEITO DO “STRESS SALINO” SOBRE O DESENVOLVIMENTO INICIAL DE RÚCULA

Abstract

The study of environmental conditions favorable to the early development of plants is the key point for obtaining high yields and satisfactory vegetable development. In view of this statement the present study aimed to evaluate the initial development of Arugula (Eruca sativa CV. Cultivated) subjected to different conditions of saline stress. Germitest sheets of paper were emerged in solutions of distilled water and sodium chloride with the following water conditions: 0; -0.2; -0.4; -0.6; -0.8; -1.0 MPa. The experiment was conducted in the laboratory of Plant Pathology of the Federal University Acre (FUA), Campus Forest. Arugula seeds were held for eight days in germitest paper soaked in different salt stress conditions in laboratory. The experimental design adopted was completely randomized with four repetitions and six treatments. The parameters measured in the experiment were: germination percentage, germination speed index, average time of germination, germination speed coefficient and vegetative development of seedlings. In this study, it was noted that the development of the hipocotile and radicle decreases linearly with increasing salt concentration. Germination of Arugula resists to saline conditions until -0.4 MPa, and from this concentration there is significant reduction in seed germination.

Keywords

• eruca sativa
• germination
• salinity