Plants grown in space would experience several challenges due to the lack of gravity and other environmental factors. For example, the absence of gravity would make it difficult for plants to orient their roots and stems in the proper direction, which could affect their growth and development. The tropisms that would be most affected by the microgravity environment of space are gravitropism and phototropism. Gravitropism is the response of plants to gravity, which helps them to grow in the correct direction. In space, plants would not have a reference point to determine which direction is up or down, so they may grow in random directions. Phototropism is the response of plants to light, which helps them to grow towards a light source. In space, plants would not have a consistent light source, so they may not be able to grow towards a specific direction. These challenges would need to be addressed in order to successfully grow plants in space for long-term space exploration or colonization.