Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiangan South Road, Xiangan District, Xiamen 361102, Fujian Province, PR China; Department of Biological Sciences and Biotechnology, Minnan Normal University, Zhangzhou 363000, Fujian Province, PR China.
Mar Pollut Bull. 2013 Nov 15;76(1-2):187-93. doi: 10.1016/j.marpolbul.2013.09.005. Epub 2013 Oct 4.
The effects of Si on growth, the anatomy of the roots, radial oxygen loss (ROL) and Fe/Mn plaque on the root surface were investigated in Avicennia marina (Forsk.) Vierh. seedlings under Cd stress. Si prompted the growth of seedlings and reduced the Cd concentration in the root, stem and leaf of A. marina. Si prompted the development of the apoplastic barrier in the roots, which may be related to the reduction of Cd uptake. The higher amount of ROL and Mn plaque on the root surface due to Si were also related to the promotion of Cd tolerance in A. marina seedlings. Therefore, it is concluded that the alteration of the anatomy of the roots, the increase of ROL and Mn plaque of A. marina seedlings play an important role in alleviation of Cd toxicity due to Si.
在镉胁迫下，研究了硅对海桑（Forsk.）幼苗生长、根系解剖结构、径向氧气损失（ROL）和根表面铁/锰斑块的影响。硅促进了幼苗的生长，并降低了海桑根、茎和叶中的镉浓度。硅促进了根系中质外体屏障的发育，这可能与减少镉吸收有关。由于硅的作用，根表面的 ROL 和锰斑块数量增加，这也与海桑幼苗耐镉能力的提高有关。因此，结论是，由于硅的作用，海桑幼苗根系解剖结构的改变、ROL 的增加和锰斑块的增加在缓解镉毒性方面发挥了重要作用。
