Artículo
Improving soybean growth under arsenic stress by inoculation with native arsenic-resistant bacteria
Wevar Oller, Ana Laura
; Regis, Sofia; Armendariz, Ana Laura
; Talano, Melina Andrea
; Agostini, Elizabeth
Fecha de publicación:
10/2020
Editorial:
Elsevier France-Editions Scientifiques Medicales Elsevier
Revista:
Plant Physiology and Biochemistry
ISSN:
0981-9428
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Certain metal (loid)-resistant bacteria that inhabit the rhizosphere have shown to improve plant growth and tolerance under toxic metal stress. In this study, we tested if six native, arsenic-resistant and plant growth promoting bacteria (PGPB) were able to enhance soybean (Glycine max L.) growth and modulate arsenic (As) uptake. As a previous work, we tested all single isolates and all possible binary combinations without arsenic stress to identify the combinations that would have the greatest plant growth promoting effect. In this study, a screening assay was performed with only five inoculation options selected after first stage (Pseudomonas sp. AW4, Pseudomonas sp. AW6, AW4+AW6, Rhodococcus sp. AW3+Pseudomonas sp. AW5 and Enterobacter sp. AW1+AW6). In both stages, inoculation was implemented by imbibition of soybean seeds with bacterial suspensions, and plant growth was carried out in pots using perlite as substrate in a chamber with controlled conditions. In the third stage, we performed similar assays, under As stress, using the three most promising inoculation options (AW4, AW6 and AW3+AW5). Treatments were performed by irrigation with 25 μM arsenite (As3+), 25 μM arsenate (As5+), 25 μM equimolar As3+/As5+ solution or water (control). Biometric and biochemical parameters indicated that inoculation with Pseudomonas sp. AW4 significantly promoted soybean growth under As3+/As5+ treatment and did not modified As accumulation pattern. Further field studies are needed to determine if some of these inoculation options are useful to improve in situ soybean growth under arsenic stress and could become a tool for the development of sustainable agriculture in As-impacted environments.
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Articulos (INBIAS)
Articulos de INSTITUTO DE BIOTECNOLOGIA AMBIENTAL Y SALUD
Articulos de INSTITUTO DE BIOTECNOLOGIA AMBIENTAL Y SALUD
Citación
Wevar Oller, Ana Laura; Regis, Sofia; Armendariz, Ana Laura; Talano, Melina Andrea; Agostini, Elizabeth; Improving soybean growth under arsenic stress by inoculation with native arsenic-resistant bacteria; Elsevier France-Editions Scientifiques Medicales Elsevier; Plant Physiology and Biochemistry; 155; 10-2020; 85-92
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