Effects of silicon on the distribution of cadmium compartmentation in root tips of Kandelia obovata (S., L.) Yong.
Effects of silicon on the distribution of cadmium compartmentation in root tips of Kandelia obovata (S., L.) Yong.
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DOI：
10.1016/j.envpol.2011.12.002
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发表时间：
2012-03
影响因子：
8.9
通讯作者：
Juan Ye;Chongling Yan;Jingchun Liu;Haoliang Lu;Tao Liu;Zengfeng Song
中科院分区：
文献类型：
--
作者：
Juan Ye;Chongling Yan;Jingchun Liu;Haoliang Lu;Tao Liu;Zengfeng Song
硅（Si）对秋茄（Kandelia obovata（S.，L.）的范围内。通过盆栽试验研究了Yong的营养价值。两种供硅处理均降低了倒卵形K. obovata幼苗根尖质外体汁液和共质体组分中Cd的含量。Si处理降低了根尖中BaCl2提取的细胞壁Cd含量，但增加了Na3柠檬酸提取的细胞壁Cd和HCl提取的细胞壁Cd含量。根尖中Cd的总含量主要分布在质外体中，质外体中的Cd大部分结合在细胞壁上。结果表明，Si提高了质外体Cd含量（> 87.08%），降低了共质体Cd含量（<12.92%）。这表明Si增强了Cd与细胞壁的结合，限制了Cd的质外体运输。
The Effects of silicon (Si) on the distribution of cadmium (Cd) compartmentation in root tips of Kandelia obovata (S., L.) Yong were investigated by pot experiments. Cd concentrations in the apoplastic saps and symplastic fractions of the root tips of K. obovata seedlings were decreased at both Si-supplied treatments. Si addition reduced the concentrations of BaCl2-extractable cell-wall-Cd in root tips, but increased the concentrations of Na3citrate-extractable cell-wall-Cd and HCl-extractable cell-wall-Cd in root tips. The total root-tip contents of Cd were mainly distributed in the apoplast and most of the Cd in the apoplast was bound to the cell wall. Our experiment found that Si increased the ratio of apoplast Cd (>87.08%) and reduced the ratio of Cd in the symplast (<12.92%). This suggested that Si enhanced binding of Cd to the cell walls and restricted the apoplastic transport of Cd.