Qiong Zhang, Chongling Yan, Jingchun Liu,Haoliang Lu,Wenyun Wang,Jingna Dua, Hanhui Duan.Marine Pollution Bulletin.2013. 76: 187-193

The effects of Si on growth, the anatomy of the roots, radial oxygen loss (ROL) and Fe/Mn plaque on theroot surface were investigated in Avicennia marina (Forsk.) Vierh. seedlings under Cd stress. Si promptedthe growth of seedlings and reduced the Cd concentration in the root, stem and leaf of A. marina. Siprompted the development of the apoplastic barrier in the roots, which may be related to the reductionof Cd uptake. The higher amount of ROL and Mn plaque on the root surface due to Si were also related tothe promotion of Cd tolerance in A. marina seedlings. Therefore, it is concluded that the alteration of theanatomy of the roots, the increase of ROL and Mn plaque of A. marina seedlings play an important role inalleviation of Cd toxicity due to Si.