Researchers  have identified that cells in castor bean endosperm follows  apoptosis mechanism during the process of gemination.They were also able to notice that endosperm cells adopt a regularity as the cells in vicinity to cotyledons first face a programmed cell death followed by the cells in vicinity.During this process,scientists found that the catalytic proteases accumulated inside the organelles(intracellular store houses) were released to cytosolic medium to cause the cell death.This research has taken advanced imaging techniques including electron microscopy and immunocytochemistry to understand the castor germination physiology.

Castor physiology is not well studied as other crops at molecular level and hence studies of this type would have a significant impact in understanding the classical germination phenomenon in a systematic way.We can also readily witness that the castor system has evolved in a perfect way to have a control in the turn over of cells for the ultimate management of the system in equilibrium which is often a problematic event in human systems resulting in cancers.

For detailed reference:http://www.pnas.org/content/96/24/14159.full