Potential of Bioremediation and PGP Traits in Streptomyces as Strategies for Bio-Reclamation of Salt-Affected Soils for Agriculture

ROMANO-ARMADA, NELI; YAÑEZ-YAZLLE, MARÍA FLORENCIA; IRAZUSTA, VERÓNICA P.; RAJAL, VERÓNICA B.; MORAGA, NORMA B.

Pathogens

MDPI

Año: 2020 vol. 9 p. 117 - 145

Environmental limitations influence food production and distribution, adding up to globalproblems like world hunger. Conditions caused by climate change require global eorts to beimproved, but others like soil degradation demand local management. For many years, saline soilswere not a problem; indeed, natural salinity shaped dierent biomes around the world. However,overall saline soils present adverse conditions for plant growth, which then translate into limitationsfor agriculture. Shortage on the surface of productive land, either due to depletion of arable landor to soil degradation, represents a threat to the growing worldwide population. Hence, the needto use degraded land leads scientists to think of recovery alternatives. In the case of salt-aectedsoils (naturally occurring or human-made), which are traditionally washed or amended with calciumsalts, bio-reclamation via microbiome presents itself as an innovative and environmentally friendlyoption. Due to their low pathogenicity, endurance to adverse environmental conditions, andproduction of a wide variety of secondary metabolic compounds, members of the genus Streptomycesare good candidates for bio-reclamation of salt-aected soils. Thus, plant growth promotion andsoil bioremediation strategies combine to overcome biotic and abiotic stressors, providing greenmanagement options for agriculture in the near future.