Leaf chlorosis is one of the most commonly observed consequences
of Cd toxicity [32]. However, chlorophyll contents in
young leaves of king grass increased significantly when soil Cd
concentration was more than 30 mgkg1, but mature leaves
were not influenced by Cd (Fig. 1), which is the reverse of some
past studies [33]. In fact, the influence of Cd on plant chlorophyll
was found at lower concentrations in young leaves than
in mature leaves.