Novel, Moon and Mars, partial gravity simulation paradigms and their effects on the balance between cell growth and cell proliferation during early plant development

Phase contrast microscopy images from root meristems exposed to simulated microgravity and Moon partial gravity (0.17？g RPMHW and RPMSW) and 1？g static control. Images taken from 2？μm semi-thin sections of fixed and embedded root tips. Identification of the meristematic cell layers and quantitative assessment of the local cell proliferation rate (number of cells per millimeter in each cell row) were performed on them. Images were quantified in Fig. Fig.2.2. Bars indicate 20？μ