Lotus corniculatus-rhizobia symbiosis under Ni, Co and Cr stress on ultramafic soil

• DOI: 10.1007/s11104-020-04546-9
• Publication Date: 2020-05-13T07:04:07Z
• Authors: Marzena Sujkowska...; Dorota Kasowska; Krzysztof Gediga; Joanna Banasiewicz; Tomasz Stępkowski
• Keywords: Lotus corniculatus; Mesorhizobium

Abstract Aims Ultramafic/serpentine soils constitute a stressful environment with many plant growth constrains such as lack of macronutrients and high levels potentially toxic metals. We considered the adaptive strategy Lotus corniculatus L.-rhizobia symbiosis to Ni, Co Cr stress conditions. Methods L. nodulating rhizobia from ultramafic soil were isolated, identified tested for nitrogen fixation, metal tolerance promoting abilities. The structural immunocytochemical analyses root nodules also performed. Results isolates effective in fixation Rhizobium Mesorhizobium tolerant Co, Cr. Some strains directly promoted non-legume Arabidopsis thaliana under stress. treated showed alternations, i.e. enhanced accumulation phenols wall thickening higher cellulose, hemicellulose, pectins, glycoproteins callose content. Conclusions Our results revealed that tolerant, rhizobacteria inhabiting may improve environment. Accumulation reorganization nodule apoplast can counteract harmful effects on symbiosis. These findings imply -rhizobia is an important element adaptation occurring soils.