Interaction of silicon and cadmium in Brassica juncea and Brassica napus

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• 作者：Zuzana Vatehová (1) (2)
  Karin Kollárová (1)
  Ivan Zelko (1)
  Danica Richterová-Ku?erová (1) (3)
  Marek Bujdo? (4)
  Desana Li?ková (1)
  
• 关键词：Brassica juncea ; Brassica napus ; cadmium ; endodermis ; shoot and root growth ; silicon ; suberin lamellae
• 刊名：Biologia
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：67
• 期：3
• 页码：498-504
• 全文大小：188KB
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• 作者单位：Zuzana Vatehová (1) (2)
  Karin Kollárová (1)
  Ivan Zelko (1)
  Danica Richterová-Ku?erová (1) (3)
  Marek Bujdo? (4)
  Desana Li?ková (1)
  
  1. Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84538, Bratislava, Slovakia
  2. Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, SK-84215, Bratislava, Slovakia
  3. Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84523, Bratislava, Slovakia
  4. Institute of Geology, Faculty of Natural Sciences, Comenius University, Mlynská dolina, SK-84215, Bratislava, Slovakia
  

文摘

The objective of this study was to determine the effect of silicon (Si) and cadmium (Cd) on root and shoot growth and Cd uptake in two hydroponically cultivated Brassica species (B. juncea (L.) Czern. cv. Vitasso and B. napus L. cv. Atlantic). Both species are potentially usable for phytoextraction. Inhibitory effects of Cd on root elongation were diminished by the impact of Si. Primary roots elongation in the presence of Cd + Si compared with Cd was stronger and the number of lateral roots was lower in B. juncea than in B. napus. Cd content per plant was higher in B. napus roots and shoots compared with B. juncea. Suberin lamellae were formed closer to the root apex in Cd + Si than in Cd treated plants and this effect was stronger in B. napus than in B. juncea. Accelerated maturation of endodermis was associated with reduced Cd uptake. Cd decreased the content of chlorophylls and carotenoids in both species, but Si addition positively influenced the content of photosynthetic pigments which was higher in B. napus than in B. juncea. Si enhanced more substantially translocation of Cd into the shoot of B. napus than of B. juncea. Based on our results B. napus seems to be more suitable for Cd phytoextraction than B. juncea because these plants produce more biomass and accumulate higher amount of Cd. The protective effect of Si on Cd treated Brassica plants could be attributed to more extensive development of suberin lamellae in endodermis.