Plant species-specificity and effects of bioinoculants and fertilization on plant performance for nickel phytomining

• Published in: Plant and soil Vol. 425; no. 1/2; pp. 265 - 285
• Main Authors: Ghasemi, Zahra, Ghaderian, Seyed Majid, Rodríguez-Garrido, Beatriz, Prieto-Fernández, Ángeles, Kidd, Petra Susan
• Format: Journal Article
• Language: English
• Published: Cham Springer 01.04.2018; Springer International Publishing; Springer Nature B.V
• Subjects: Animal wastes; Biomedical and Life Sciences; Botanical research; Cattle manure; Chemical properties; Ecology; Fertilization; Flowers & plants; Growth; Hydrogen peroxide; Inoculation; Life Sciences; Malondialdehyde; Manures; Nickel; Physiological aspects; Plant growth; Plant Physiology; Plant protection; Plant Sciences; Plant species; Plants (Organisms); Regular Article; Serpentine; Serpentine soils; Soil amendment; Soil Science & Conservation; Soils; Yield; Ultramafic soil; Antioxidant stress enzymes; Plant growth promoting rhizobacteria (PGPR); hyperaccumulators
• ISSN: 0032-079X; 1573-5036
• DOI: 10.1007/s11104-017-3553-x

Aims To investigate the effects of fertilization and bacterial inoculation on the growth, health and Ni phytoextraction capacity of three Ni-hyperaccumulators, Odontarrhena bracteata, O. inflata and O. serpyllifolia. Methods Plants were grown for three months in serpentine soil fertilized with inorganic NPK or amended with cow manure and inoculated with five rhizobacterial strains (previously isolated from O. serpyllifolia). Shoot and root dry weight (DW) yields, Ni accumulation and removal, nutritive status and stress indicators were determined. Results Plants grown in manure-amended soil showed significantly higher DW yields, improved nutritive status and higher total Ni phytoextracted. Some bacterial inoculants enhanced Ni removal due to the stimulation in growth and/or increase in shoot Ni concentration but this depended on the plant species, soil type and inoculant. Pseudoarthrobacter oxydans strain SBA82 enhanced shoot DW yield of all three Odontarrhena spp. in at least one soil type. Paenarthrobacter sp. strain LA44 and Stenotrophomonas sp. strain MA98 promoted growth of O. serpyllifolia and O. bracteata. Inoculated plants showing growth promotion presented lower activities of antioxidative enzymes, and concentrations of malondialdehyde (MDA) and H2O2, indicating a protective effect of these inoculants on the plants. Conclusion Rhizobacterial inoculants applied in combination with manure can improve plant growth and health, and Ni phytoextraction, in some hyperaccumulating Odontarrhena spp.