Abstract
Cadmium (Cd)-contaminated rice imposes severe health risks to human. The present study investigated the role of arbuscular mycorrhizal fungi (AMF) in sculpting the rhizospheric bacterial community, and the potential effects on the Cd uptake by rice. AMF Funneliformis mosseae (Fm) or Rhizophagus intraradices (Ri) were inoculated to rice grown in soils spiked with 0 or 10 μM Cd. Initial Cd concentration in soil was 0.18 mg/kg. AMF colonization rate, plant biomass, Cd content in rice, soil properties, rice Cd transporters (Nramp5 and HMA3) and soil bacterial community were analysed. Both AMF decreased (P < 0.05) root and shoot Cd concentrations, especially for Ri treatment. The higher relative abundance of Actinobacteria (mostly from genus Arthrobacter) observed in Ri treatment probably absorbed Cd in soil, and hence decreased the Cd availability for rice. Expression of genes Nramp5 and HMA3 in root were lower in Ri treatment, but higher in Fm treatment. The gene expressions were in line with the results of lower root Cd content in Ri treatment, and higher in Fm treatment. The present study firstly revealed that AMF can reduce rice Cd uptake by changing the expression of Cd transporters and soil bacterial community in a pot experiment. Effects of plants-bacteria-fungi interaction on both plant productivity and toxicants uptake deserved further study.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
