Biophysical methods used to generate tolerance to drought stress in seeds and plants: a review
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National Polytechnic Institute, Sepi-Esime-Zacatenco, Programme in Systems Engineering-Biophysical systems, Professional Unit ‘Adolfo López Mateos’, Alcaldía GAM, Col. Lindavista, CP 07738, Mexico City, Mexico
Department of Physics, Cinvestav-IPN, A. P. 14-740. 07360, Mexico City, Mexico
Academic Unit of Physics, Autonomy University of Zacatecas, A.P. 580, Zacatecas, Mexico
Claudia Hernandez-Aguilar   

en Ingeniería de Sistemas, Instituto Politécnico Nacional, SEPI-ESIME-Zacatenco, Av. IPN, S/N, UPALM, Alc. GAM, Col. Lindavista, 07738, Ciudad de Mexico, Mexico
Final revision date: 2021-12-08
Acceptance date: 2021-12-14
Publication date: 2022-01-05
Int. Agrophys. 2021, 35(4): 389–410
  • The most used physical methods have favorable effects on seeds and plants,
  • Physical method treatments increase or decrease physicochemical properties in seeds and plants,
  • Treatments with UV light radiation and different magnetic fields are the ones that produce the most effects on plants and seeds,
Drought stress has serious repercussions for agriculture, affecting crop growth with low yield effects concerning food production and food security. The main objective of this research is to conduct a scientific literature review of the physical methods used to generate tolerance to water stress in crops. (i) The most widely applied physical method to counteract the effects of drought stress is UV radiation, magnetic field application (18%), He-Ne and CO2 laser (18%), gamma radiation (9%) and plasma (6%). (ii) Treatments with ultraviolet light and magnetic fields have been applied mainly in cereals, vegetables, legumes, medicinal plants, and trees. Also, He-Ne, CO2 laser, and plasma in seeds in cereals and medicinal plants in the pre-sowing stage to seed level. Finally, gamma radiation has been applied to plants and seeds (grass, flowers, sugar plant). (iii) The reported physical methods can increase or decrease the biochemical variables under water stress depending on the physical method and radiation parameters applied, as well as the crop, level of drought and the environment in which the plants develop. Thus, UV radiation, magnetic fields, gamma radiation, and He-Ne and CO2 lasers are physical methods that produce seed and plant improvement effects.
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