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2007 | 29 | 5 |
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Intraspecific variability of cadmium tolerance in hydroponically grown Indian mustard (Brassica juncea (L.) Czern.) seedlings

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Języki publikacji
Indian mustard (Brassica juncea (L.) Czern.) is a promising plant species for phytoremediation of heavy metal polluted soils. However, genetic variability of metal tolerance in Indian mustard has not been studied. We evaluated intraspecific variation of Cd tolerance of this species by screening 64 varieties in hydroponics. The tolerance index (TI), calculated as percentage of root length of Cd-treated (7 µM CdCl₂) over untreated control seedlings, significantly varied from 34 to 79%, depending on the variety. Information about phenotypic and economic traits of the studied varieties was taken from the literature and subjected to a cluster analysis. The varieties were distributed into three clusters and most of the varieties characterized by the highest TI values (TI > 65%) were grouped together in one cluster. Moreover, TI negatively correlated with the following characteristics: yellow seed colour (R = –0.35, P = 0.005), total oil content (R = –0.33, P = 0.008), oleic acid (R = –0.25, P = 0.047) and linoleic acid (R = –0.36, P = 0.004) contents in seeds. The results showed the presence of significant variability for Cd tolerance in Indian mustard. The knowledge about correlations between Cd tolerance and phenotypic characteristics of plants might be utilized for rapid selection of cultivars to be used for phytoremediation of polluted soils.
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  • All-Russia Research Institute for Agricultural Microbiology, Podbelskogo Sh. 3, Pushkin-8, 196608 St-Petersburg, Russia
  • All-Russia Research Institute for Agricultural Microbiology, Podbelskogo Sh. 3, Pushkin-8, 196608 St-Petersburg, Russia
  • All-Russia Research Institute for Agricultural Microbiology, Podbelskogo Sh. 3, Pushkin-8, 196608 St-Petersburg, Russia
  • N.I. Vavilov Research Institute of Plant Industry, B. Morskaya Str. 42, 190000 St-Petersburg, Russia
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