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Sci Rep ; 8(1): 2136, 2018 02 01.
Article in English | MEDLINE | ID: mdl-29391436

ABSTRACT

Various medicinal plants are threatened with extinction owing to their over-exploitation and the prevalence of soil borne pathogens. In this study, soils infected with root-rot pathogens, which prevent continuous-cropping, were treated with an electron beam. The level of soil-borne fungus was reduced to ≤0.01% by soil electron beam treatment without appreciable effects on the levels of antagonistic microorganism or on the physicochemical properties of the soil. The survival rate of 4-year-old plant was higher in electron beam-treated soil (81.0%) than in fumigated (62.5%), virgin (78%), or untreated-replanting soil (0%). Additionally, under various soils conditions, neutron tomography permitted the monitoring of plant health and the detection of root pathological changes over a period of 4-6 years by quantitatively measuring root water content in situ. These methods allow continual cropping on the same soil without pesticide treatment. This is a major step toward the environmentally friendly production of endangered therapeutic herbs.


Subject(s)
Crops, Agricultural , Electrons/therapeutic use , Neutrons , Panax notoginseng/growth & development , Plant Roots/growth & development , Soil Microbiology/standards , Soil/chemistry , Panax notoginseng/radiation effects , Plant Roots/radiation effects , Tomography, X-Ray Computed
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