Cadmium uptake, localization and stress-induced morphogenic response in the fern Pteris vittata
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- 作者：Mirko Balestri (1)
Alessio Ceccarini (2)
Laura Maria Costantina Forino (1)
Ivan Zelko (3)
Michal Martinka (4)
Alexander Lux (4)
Monica Ruffini Castiglione (1) - 关键词：Cadmium uptake ; Cadmium tolerance ; Phytoremediation ; Pteris vittata ; Root adaptive response
- 刊名：Planta
- 出版年：2014
- 出版时间：May 2014
- 年：2014
- 卷：239
- 期：5
- 页码：1055-1064
- 全文大小：
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Alessio Ceccarini (2)
Laura Maria Costantina Forino (1)
Ivan Zelko (3)
Michal Martinka (4)
Alexander Lux (4)
Monica Ruffini Castiglione (1)
1. Department of Biology, University of Pisa, via L. Ghini 13, 56126, Pisa, Italy
2. Department of Chemistry and Industrial Chemistry, University of Pisa, via Risorgimento 35, 56126, Pisa, Italy
3. Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 845 38, Bratislava, Slovak Republic
4. Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina B2, 842 15, Bratislava, Slovak Republic - ISSN：1432-2048
文摘
Cadmium uptake, tissue localization and structural changes induced at cellular level are essential to understand Cd tolerance in plants. In this study we have exposed plants of Pteris vittata to different concentrations of CdCl2 (0, 30, 60, 100?μM) to evaluate the tolerance of the fern to cadmium. Cadmium content determination and its histochemical localization showed that P. vittata not only takes up, but also transports and accumulates cadmium in the aboveground tissues, delocalizing it mainly in the less bioactive tissues of the frond, the trichomes and the scales. Cadmium tolerance in P. vittata was strictly related to morphogenic response induced by the metal itself in the root system. Adaptive response regarded changes of the root apex size, the developmental pattern of root hairs, the differentiation of xylem elements and endodermal suberin lamellae. All the considered parameters suggest that, in our experimental conditions, 60?μM of Cd may represent the highest concentration that P. vittata can tolerate; indeed this Cd level even improves the absorbance features of the root and allows good transport and accumulation of the metal in the fronds. The results of this study can provide useful information for phytoremediation strategies of soils contaminated by Cd, exploiting the established ability of P. vittata to transport, delocalize in the aboveground biomass and accumulate polluting metals.