pyrenoid

A proteinaceous structure found within the chloroplast of certain algae and hornwort bryophytes. It is thought to be a site where carbon is concentrated.

Resembling in form the stone of a fruit; globular; nucleiform; of excrescent bodies, wart-like.

A small colorless mass of proteid substance of a crystalline form, usually appearing hexagonal in optical section.

One of the colorless plastids, or leucoplasts, found in the chromatophores of algæ and constituting centers for the formation of starch.

A transparent body found in the chromatophores of certain Infusoria.

any of several transparent structures found in the chloroplast of certain algae etc.; they are responsible for the fixation of carbon dioxide and the formation of starch