Embryogenesis and germination in rye (Secale cereale L.) : 1. Fine structure of the developing embryo.

Cells of the young embryo contain highly differentiated organelles. During maturation and dehydration, complexity is reduced, the many layers of endoplasmic reticulum associated with electron lucent bodies become reduced to a few residual crescents, lipid droplets distributed in the cytoplasm migrate to and become closely appressed to the plasmalemma, mitochondrial cristae are reduced in number and dictyosomes are compacted.