Abstract:
:Cadmium (Cd) contamination in paddy fields affects human health because of the consumption of Cd-contaminated rice. In the current study, we demonstrated that variation in root system architecture (RSA) influenced Cd uptake by rice. Rice cultivars consisting of KDML105, Mali Dang, Pitsanulok2 and Niaw San-pah-tawng were assessed in hydroponics and mesocosms while KDML 105, Pitsanulok2, and RD53 were used in field experiments. In hydroponics, root number and root weight were positively correlated with Cd uptake. In mesocosms, we found that the effects of Cd on RSA depended on rice varieties. Among different rice varieties, Mali Dang consistently accumulated high concentration of Cd, while Niaw San-pah-tawng tended to accumulate much lower amount in its shoot in both hydroponics and mesocosms. Correlation analysis indicates that Cd concentrations in shoot was positively correlated with root weight (R2 = 0.95), crown root number (R2 = 0.74), and negatively correlated with root depth (R2 = 0.86). In the field, Cd is most abundant at a depth of 10-20 cm. and root distribution influenced Cd uptake as evidenced by high root Cd content in the RD53 variety. We propose that low crown root number and deep RSA could be promising traits for selection and breeding for low Cd uptake rice.
journal_name
Int J Phytoremediationjournal_title
International journal of phytoremediationauthors
Meeinkuirt W,Phusantisampan T,Saengwilai Pdoi
10.1080/15226514.2018.1523869subject
Has Abstractpub_date
2019-01-01 00:00:00pages
19-26issue
1eissn
1522-6514issn
1549-7879journal_volume
21pub_type
杂志文章abstract::Enhanced phytoremediation adding biodegradable amendments like low molecular weight organic acids and surfactants is an interesting area of current research to overcome the limitation that represents low bioavailability of pollutants in soils. However, prior to their use in assisted phytoremediation, it is necessary t...
journal_title:International journal of phytoremediation
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journal_title:International journal of phytoremediation
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