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.

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