أثر الإجهاد الملحي على نمو و تطور نبات الطماطم esculentum M. Lycopersicum

Abstract

Soil salinity is one of the newly emerged that directly affects agricultural products, especially vegetables, including tomatoes.Lycopersicum esculentum M. Hinz.class. This study was conducted under laboratory conditions at the Faculty of Science and Technology of the University Center Abdel Hafeed Boussouf during the academic year 2022/2021 in order to know to what extent salinity affects the morphological and anatomical phenomena of tomato plants in different salt concentrations of NaCl (S0 = 0g/l), (S1 = 2.5g/l), (S2=5g/l), (S3=10g/l) during seedling growth stage. The obtained results included a significant decrease in morphological indicators (stem length, number of leaves) and an increase in root length. As for anatomically, a significant decrease was observed in the layers of the completed cross-sections of the stems, as the epidermis, the outer cortex (exoderm) and the vascular cambium decreased. While an increase was recorded in the inner cortex (endoderm), an increase in the size of cells was also observed with lack or absence of intercellular spaces and the occurrence of necrosis in cells (rupture). From the obtained results, we concluded that the tomato plant of Hinz class exhibited a salinity-resistant behavior. Therefore, we can grow this class(Hinz) in saline lands with a salt concentration of (2.5 to 5 g/l)