Citrus seeds are known to have short life spans in conventional seed banks. Seed of most Citrus species show a typical intermediate storage behaviour where they survive desiccation to c. 7-10%. However, longevity is compromised at this low moisture content at sub-zero temperatures. Cryopreservation of zygotic embryos is an option...
The developmental morphology and genetics of the orchid flower is described in order to explore the evolutionary ‘no man’s land’ that separates the Extended Synthesis from the Modern Synthesis. The gynostemium, ubiquitous among orchids and developed through congenital fusion (and dorsal suppression) of fertile reproductive organs, is an unbreakable evolutionary...