| The aim of this study was to evaluate the effect of cadmium（Cd） on the plants growth in saline-alkaline wetland. As a typical plant grown in such wetland, Suaeda glauce was chosen for this investigation. The seed germination and seedling growth properties of Suaeda glauce exposed to Hoagland′s solution with Cd concentration of 0, 1 mg·L-1, 3 mg·L-1, 10 mg·L-1, 30 mg·L-1, 100 mg·L-1 and 300 mg·L-1 were analyzed. Cd concentration of 3 mg·L-1 significantly enhanced germination potential, germination index, root/shoot ratio, shoot diameter and root diameter; Cd concentration of 10 mg·L-1 significantly enhanced vigor index, shoot weight and root weight; Cd concentration of 30 mg·L-1 significantly enhanced germination and shoot length; Cd concentration of 3 mg·L-1 and 10 mg·L-1 significantly decreased root length and root activity respectively（P<0.05）. Principal component analysis showed seed germination potential got highest loading score at the first principal component, indicating this factor was effective to reflect the growth state of Suaeda glauce under Cd stress. Therefore seed germination potential of Suaeda glauce might serve as potential biomarker, which was helpful to the monitor or evaluation of Cd pollution in saline-alkaline wetland. |
