Endophytic selenobacteria and arbuscular mycorrhizal fungus for Selenium biofortification and Gaeumannomyces graminis biocontrol

Paola Durán; Sharon, Viscardi; Jacquelinne J. Acuña; Pablo Cornejo; Rosario Azcón; María de la Luz Mora

Keywords: selenium, green fluorescent protein, Biofortification, NanoSe, take-all disease

Abstract

Abstract: Selenium (Se) is an important antioxidant considered among the fertilization programs in developed countries. In Chile, chemical fertilization based in Se is inefficient due the physicochemical characteristics of Andisol that sustain the 60% of crop production. Andisol also are highly conductive to take-all disease caused by Gaeumannonyces graminis var tritici (Ggt). Here, we evaluated the effect of Bacillus sp.E5 and Acinetobacter sp.E6.2 and Claroideoglomus claroideum as potential inocula for Se biofortification and Ggt bicontrol in wheat. Plants inoculated with Acinetobacter sp.E6.2 showed major root growth and major Se content in shoots and grains. The antioxidant role of Se regarding DPPH activity was shown in Se-supplemented plants with small Se nanoparticles founded inside the roots. Mycorrhizal plants showed major SOD activity in shoots but no affected the Se uptake. Respect to pathogen biocontrol, plants inoculated with both bacteria showed an efficient control against Ggt independent to mycorrhization. Thus, our inocula could make important contributions to produce enriched Se flours for human nutrition and biocontrol against Ggt.

Más información

Título según SCIELO: Endophytic selenobacteria and arbuscular mycorrhizal fungus for Selenium biofortification and Gaeumannomyces graminis biocontrol
Título de la Revista: JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
Volumen: 18
Número: 4
Editorial: Springer
Fecha de publicación: 2018
Página de inicio: 1021
Página final: 1035
Idioma: en
DOI:

10.4067/S0718-95162018005002902

Notas: SCIELO