Abstract
Cress seeds (Lepidium Sativum) were exposed to a 2g hypergravitational
environment in a centrifuge for eight days to test the effects of such
gravity on their germination and growth. The purpose of this research is
to simulate the gravitational conditions experienced on a super-Earth
exoplanet. An identical set of cress seeds were grown without exposure
to hypergravity for eight days as a control. After four separate runs,
measurements showed a decrease in the growth rate of the test group
compared to the control group. This decrease varied with each of the
four test runs. However, all test groups showed a lower growth rate than
the control group, between 5.25% and 15.63%. This experiment showed
that exposing cress seeds to hypergravity for an extended period will
cause these plants to grow shorter relative to control groups.
Understanding what mechanism causes slower growth is essential for
understanding how life might arise, grow and evolve on other planets
with greater mass than Earth.