Cadmium Accumulation and Physiological Changes in Zea Mays L.

摘要

Corn (Zea Mays L.) seedlings were in four cadmium (Cd) levels of 0-1mg/L in a hydroponic system to analyze the antioxidant enzyme system, Cd content in the shoots and roots, growth responces in the leaves of corn and phytosiderphore release. There was a significant decrease in superoxide dismutase (SOD) activities, chlorophyll concentration (Ch1), shoot and root biomass and phytosiderphore release from Cd 0mg/L to 1mg/L. This indicated that Cd stress induced an oxidative stress response in corn seedlings, characterized by a decrease in activities of SOD and ch1 concentration. Root and shoot Cd contents of corn increased with their exposure Cd level, and the highest Cd concentration occurred in roots, followed by leaves.