Priestia flexa un microorganismo endófito de manglar con posible uso para terraformación marciana
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Fecha
2022
Autores
Solano Llanos, Nataly
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Ediciones Universidad Simón Bolívar
Facultad de Ciencias Básicas y Biomédicas.
Facultad de Ciencias Básicas y Biomédicas.
Resumen
El cultivo de especies vegetales en el suelo marciano resulta de gran interés para las agencias espaciales internacionales, en el proceso de terraformación de Marte conocido como el planeta rojo, sin embargo, esto resulta ser relativamente complejo y costoso. El suelo de Marte está compuesto por una gran variedad de metales y cristales de sales, por tal motivo el establecimiento de vegetación en su suelo estará condicionado a la capacidad de las plantas de superar las condiciones adversas tanto físicas como ambientales, en especial el estrés salino.
En este trabajo se evalúa la tolerancia de Priestia flexa a salinidad y metales pesados en condiciones de laboratorio anteriores a un viaje espacial y su crecimiento posterior a una misión espacial a bordo de un globo sonda que la expuso a radiación UV y microgravedad.
Priestia flexa presentó un crecimiento hasta una concentración de 0,75 M de cloruro de magnesio, 1 M de sulfato de magnesio, 600 mM de perclorato de sodio y tolerancia al mismo de 800 mM. También se evidenció que P. flexa presentó mayor tolerancia al cromo teniendo una concentración mínima inhibitoria de 15 mM y máxima bactericida de 50 mM y se
evidenció que es capaz de crecer hasta concentraciones de 0,25 mM de mercurio, datos que fueron obtenidos de ensayos realizados en el Centro de Biología Molecular Severo Ochoa en Madrid, España.
The cultivation of plant species in the Martian soil is of great interest to international space agencies, in the process of terraforming Mars known as the red planet, however, this turns out to be relatively complex and expensive. The soil of Mars is composed of a wide variety of metals and salt crystals, for this reason the establishment of vegetation on its soil will be conditioned by the ability of plants to overcome adverse physical and environmental conditions, especially saline stress. . In this work, the tolerance of Priestia flexa to salinity and heavy metals under laboratory conditions prior to space travel and its growth after a space mission aboard a balloon that exposed it to UV radiation and microgravity is evaluated. Priestia flexa showed growth up to a concentration of 0.75 M magnesium chloride, 1 M magnesium sulfate, 600 mM sodium perchlorate and tolerance to 800 mM. It was also shown that P. flexa showed greater tolerance to chromium, having a minimum inhibitory concentration of 15 mM and a maximum bactericidal concentration of 50 mM, and it was shown that it is capable of growing up to concentrations of 0.25 mM of mercury, data obtained from tests performed at the Severo Ochoa Molecular Biology Center in Madrid, Spain.
The cultivation of plant species in the Martian soil is of great interest to international space agencies, in the process of terraforming Mars known as the red planet, however, this turns out to be relatively complex and expensive. The soil of Mars is composed of a wide variety of metals and salt crystals, for this reason the establishment of vegetation on its soil will be conditioned by the ability of plants to overcome adverse physical and environmental conditions, especially saline stress. . In this work, the tolerance of Priestia flexa to salinity and heavy metals under laboratory conditions prior to space travel and its growth after a space mission aboard a balloon that exposed it to UV radiation and microgravity is evaluated. Priestia flexa showed growth up to a concentration of 0.75 M magnesium chloride, 1 M magnesium sulfate, 600 mM sodium perchlorate and tolerance to 800 mM. It was also shown that P. flexa showed greater tolerance to chromium, having a minimum inhibitory concentration of 15 mM and a maximum bactericidal concentration of 50 mM, and it was shown that it is capable of growing up to concentrations of 0.25 mM of mercury, data obtained from tests performed at the Severo Ochoa Molecular Biology Center in Madrid, Spain.
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Palabras clave
Bacterias endófitas, Suelo salino, Terraformación, Bioaumentación, Globo sonda, Endophytic bacteria, Saline soil, Terraforming, Bioaugmentation, Weather balloon
