Abstract
Given the ubiquous presence of AM fungi, a major constraint to the evaluation of the activity of AM colonization has been the need to account for the indigenous soil native inoculum. This has to be controlled (i.e., reduced or eliminated) if we are to obtain a true control treatment for analysis of arbuscular mycorrhizas in natural substrates. There are various procedures possible for achieving such an objective, and the purpose of this chapter is to provide details of a number of techniques and present some evaluation of their advantages and disadvantages.
Soil solarization, steam sterilization, pasteurization, γ irradiation, chemicals application, soil disturbance, crop rotation, the use of ozone and myc− plants are the techniques focused. These techniques differently affect physical and chemical soil characteristics, as well as eliminating soil microorganisms that can interfere with the development of mycorrhizas.
No method developed for reducing the competition from indigenous AM fungi is ideal for every application, and the ultimate choice of methodology for establishing an adequate non-mycorrhizal control depends on the design of the particular experiments, the facilities available and the amount of soil requiring treatment.
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Brito, I., de Carvalho, M., Goss, M.J. (2009). Techniques for Arbuscular Mycorrhiza Inoculum Reduction. In: Varma, A., Kharkwal, A.C. (eds) Symbiotic Fungi. Soil Biology, vol 18. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-95894-9_19
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