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Cultivar and Metal-Specific Effects of Endophytic Bacteria in Helianthus tuberosus Exposed to Cd and Zn. | LitMetric

Cultivar and Metal-Specific Effects of Endophytic Bacteria in Helianthus tuberosus Exposed to Cd and Zn.

Int J Mol Sci

Departamento de Investigación Agroambiental, IMIDRA, Finca "El Encín", Autovía del Noreste A-2 Km 38.2, 28800 Alcalá de Henares, Madrid, Spain.

Published: September 2017

AI Article Synopsis

Article Abstract

Plant growth promoting endophytic bacteria (PGPB) isolated from were inoculated in two cultivars of (VR and D19) growing on sand supplemented with 0.1 mM Cd or 1 mM Zn. Plant growth, concentrations of metals and thiobarbituric acid (TBA) reactive compounds were determined. Colonization of roots of D19 by sp. 262 was evaluated using confocal laser scanning microscopy. sp. 228, sp. 246 and sp. 262 significantly enhanced growth of D19 exposed to Cd or Zn. sp. 228 significantly increased Cd concentrations in roots. Serratia sp. 246, and Pseudomonas sp. 256 and 228 resulted in significantly decreased contents of TBA reactive compounds in roots of Zn exposed D19 plants. Growth improvement and decrease of metal-induced stress were more pronounced in D19 than in VR. sp. 262green fluorescent protein (GFP) colonized the root epidermis/exodermis and also inside root hairs, indicating that an endophytic interaction was established. D19 inoculated with Pseudomonas sp. 228, Serratia sp. 246 and Pseudomonas sp. 262 holds promise for sustainable biomass production in combination with phytoremediation on Cd and Zn contaminated soils.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5666708PMC
http://dx.doi.org/10.3390/ijms18102026DOI Listing

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