. "\"Sac-like membranous structures (cisternae) in a chloroplast combined into stacks (grana) and present singly in the stroma (stroma thylakoids or frets) as interconnections between grana. An example of this component is found in Arabidopsis thaliana.\" [GOC:mtg_sensu, ISBN:0943883999]" . . "chloroplast thylakoid" . . .