{"id":234635,"date":"2026-06-28T07:45:32","date_gmt":"2026-06-28T07:45:32","guid":{"rendered":"https:\/\/teknomers.com\/en\/we-have-been-growing-lettuce-in-space-for-years-but-now-weve-discovered-it-could-make-us-sick\/"},"modified":"2026-06-28T07:45:34","modified_gmt":"2026-06-28T07:45:34","slug":"we-have-been-growing-lettuce-in-space-for-years-but-now-weve-discovered-it-could-make-us-sick","status":"publish","type":"post","link":"https:\/\/teknomers.com\/en\/we-have-been-growing-lettuce-in-space-for-years-but-now-weve-discovered-it-could-make-us-sick\/","title":{"rendered":"We Have Been Growing Lettuce in Space for Years, but Now We’ve Discovered It Could Make Us Sick"},"content":{"rendered":"\n
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Bad news for astronauts who usually eat healthy. That is, for all astronauts. It has been almost ten years since the crew of the International Space Station<\/strong> (ISS) has consumed the vegetables they grow in microgravity, including lettuce, peppers, and radishes. Recently, astronauts aboard the Chinese space station have started growing their own vegetables, such as lettuce, cherry tomatoes, and chives<\/a>. However, a troubling development has emerged: space salads may not be as safe to eat as previously thought.<\/p>\n

The Problem with Space-Grown Vegetables<\/h2>\n

A team of researchers from the University of Delaware has found that lettuce and other vegetables grown in microgravity<\/strong> are more susceptible to contamination by bacteria, particularly Salmonella. This discovery is crucial, as astronauts rely on these homegrown crops for their nutrition while in space. Until now, it was believed that the unique conditions of microgravity would prevent the stomata (small pores) of plants from opening, thereby defending against pathogens.<\/p>\n

Understanding Contamination Mechanisms<\/h3>\n

Recent studies reveal that the entry of Salmonella enterica<\/em> into plant tissues is not dependent on the density of these stomata. Instead, it appears that the specific variety of lettuce and the microgravity environment itself are major factors influencing contamination risk.<\/p>\n

Failures of Friendly Bacteria<\/h2>\n

Previously, researchers investigated the use of friendly bacteria, specifically B. subtilis, to combat this contamination. Earth-based studies showed that these bacteria helped plants fight off pathogens. However, in a simulated microgravity environment<\/strong>, B. subtilis was unable to protect the lettuce from contamination. This suggests that the unique conditions of space significantly alter the relationships between plants and microbes.<\/p>\n

Implications for Space Agriculture<\/h3>\n

This finding raises pressing questions about the safety of salads cultivated on the ISS and emphasizes the need to rethink agricultural practices for future space colonies. Understanding these complexities can help address potential health risks in environments where astronauts will depend on homegrown food.<\/p>\n

Potential Solutions: Red Lettuce<\/h2>\n

Fortunately, researchers have identified a possible solution: switching to red lettuce. Preliminary findings suggest that its higher phenol and antioxidant content might offer better protection against Salmonella<\/em>. Selecting varieties with these traits could enhance the food safety and security of crops grown in space.<\/p>\n

The Future of Space Farming<\/h2>\n

As Earth’s population grows and agricultural land diminishes, space farming is becoming a realistic option for meeting food needs. However, to prevent a salmonellosis outbreak<\/strong> in off-Earth settings, future space farmers must take hygiene seriously\u2014washing hands thoroughly with soap and water will be essential.<\/p>\n

As we explore the cosmos, ensuring the safety of our food supply will play a critical role in the success of long-term human habitation in space.<\/p>\n<\/div>\n


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General News – 2<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Bad news for astronauts who usually eat healthy. That is, for all astronauts. It has been almost ten years since the crew of the International Space Station (ISS) has consumed the vegetables they grow in microgravity, including lettuce, peppers, and radishes. Recently, astronauts aboard the Chinese space station have started growing their own vegetables, such […]<\/p>\n","protected":false},"author":1,"featured_media":234636,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36399],"tags":[4180,6110,53386,2122,1281,10731,45],"class_list":["post-234635","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-discovered","tag-growing","tag-lettuce","tag-sick","tag-space","tag-weve","tag-years"],"_links":{"self":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/234635","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/comments?post=234635"}],"version-history":[{"count":1,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/234635\/revisions"}],"predecessor-version":[{"id":234637,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/234635\/revisions\/234637"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/media\/234636"}],"wp:attachment":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/media?parent=234635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/categories?post=234635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/tags?post=234635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}