Host-microbe interactions in microgravity: assessment and implications.

This research paper explores how living things like astronauts interact with tiny organisms called microbes that live on or inside them - these are known as their "microbiomes." Just like our bodies have good and bad bacteria in the gut, plants also host different types of microorganisms. Scientists think understanding this relationship is very important for space travel because being in space changes how gravity works around us, which can affect both humans and these tiny organisms living with them. The study shows that even though astronauts are exposed to a unique environment like zero-gravity during their trips into space, it doesn't harm the good microbes they host or disrupt important communication between different cells in plants - this is essential for maintaining health and fighting diseases back on Earth.

This research paper delves into the intricate relationship between human astronauts (and other eukaryotic hosts) and their associated microbiomes within a spaceflight environment characterized by reduced gravity or microgravity. The study underscries that both humans and plants should be considered as metaorganisms, wherein crosstalk at the genetic and cellular levels between host organisms and their respective microbiomes redefines our understanding of health and disease [105]. The methodology employed in this research involves examining how spaceflight impacts all living systems from a genomic to physiological level. The physical factors associated with the space environment, such as reduced gravity or chronic elevated CO2 levels, are identified as unique stressors on biological entities [106]. Key findings of this study indicate that while microgravity can impair initial colonization and cell-cell communication required by host organisms and their associated microbial communities, it does not necessarily hinder the overall establishment or functioning of these complex associations. This suggests a certain level of resilience in biological systems to adapt to spaceflight conditions [105].