Background In most gymnosperms the cotyledons develop as a crown surrounding the incipient shoot apical meristem (SAM), which maintains the radial symmetry of the plant throughout embryogenesis. This is in contrast to the Arabidopsis embryo in which a symmetry-breaking event (from radial to bilateral symmetry) is associated with the emergence of the SAM and the two cotyledons [1]. We have previ...

(1) Background. Conifers are the main plantation species in southern China, including Masson Pine (MP), Chinese fir (CF) and thuja (CT). Clarifying suitable site conditions for these conifers is helpful large-area afforestation, so as to manage forests provide a higher level of ecosystem services. To achieve research goals, we take Hubei Province China case study. (2) Methods. The situations co...