The Addition of Selenium to the Nutrient Solution Decreases Cadmium Toxicity in Pepper Plants Grown under Hydroponic Conditions oleh Rafael Perez-Millan, Marina Alfosea-Simon, Ernesto Alejandro Zavala-Gonzalez, Jose Maria Camara-Zapata, Juan Jose Martinez-Nicolas, Vicente Lidon, Inma Simon, Muhammad Adnan Shahid, Francisco Garcia-Sanchez, Silvia Simon-Grao