9Zhu Z J, Wei G Q, Li J, et al. Silicon alleviates salt stress and increases antioxidant enzymes activity in leaves of salt stressed cucumber (Cucumis sativus L. )[J]. Plant Science, 2004,167(3) :527-533.
10Cakmak I, Marschner H. Magnesium deficiency and high light intensity enhance activities of superoxide dismutate, ascorbate peroxidase, and glutathione reductase in bean leaves [J]. Plant Physiology, 1992,98:1222 1227.
