Extracellular DNA: Insight of a Signal Molecule in Crop Protection
2021
Carbajal-Valenzuela, Ireri Alejandra | Medina-Ramos, Gabriela | Caicedo-Lopez, Laura Helena | Jiménez-Hernández, Alejandra | Ortega-Torres, Adrian Esteban | Contreras-Medina, Luis Miguel | Torres-Pacheco, Irineo | Guevara-González, Ramón
Agricultural systems face several challenges in terms of meeting everyday-growing quantities and qualities of food requirements. However, the ecological and social trade-offs for increasing agricultural production are high, therefore, more sustainable agricultural practices are desired. Researchers are currently working on diverse sustainable techniques based mostly on natural mechanisms that plants have developed along with their evolution. Here, we discuss the potential agricultural application of extracellular DNA (eDNA), its multiple functioning mechanisms in plant metabolism, the importance of hormetic curves establishment, and as a challenge: the technical limitations of the industrial scale for this technology. We highlight the more viable natural mechanisms in which eDNA affects plant metabolism, acting as a damage/microbe-associated molecular pattern (DAMP, MAMP) or as a general plant biostimulant. Finally, we suggest a whole sustainable system, where DNA is extracted from organic sources by a simple methodology to fulfill the molecular characteristics needed to be applied in crop production systems, allowing the reduction in, or perhaps the total removal of, chemical pesticides, fertilizers, and insecticides application.
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