Effect of ethanol conservation treatment on leaf cross sections analyzed by light microscopy (LM). Cross section showing general view of dehydrated cells of J. curcas leaves observed by LM. (A) Control. (B) 1 h in ethanol. (C) After 30 days in ethanol. Abbreviations are as follows: adaxial epidermis (ade), palisade parenchyma (pp), vascular bundle (vb), spongy parenchyma (sp), and abaxial epidermis (abe). *intercellular space. Bar: LM - 50 μm.