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pyrenoid

A Dictionary of Biology

pyrenoid A spherical protein body found in the chloroplasts of many algae and the hornworts (see Anthocerophyta). Pyrenoids are associated with the storage of starch: layers of starch are often found around them.

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Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004.

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	pyrenoid pyrenoid A region of starch formation found in the chloroplasts of various algae (e.g. Spirogyra and Chlamydomonas ). Read more
	pyrenoid see chloroplast . Read more
	Anthocerophyta ...longitudinally to release the spores. Hornwort cells each contain a single chloroplast inside which, uniquely among plants, is a pyrenoid , associated with starch production. Some species have separate male and female plants, while others have both types of sexual... Read more
	chloroplast ...pigments. Chloroplasts are thus the central site of the photosynthetic process in plants. The chloroplasts of algae are simpler than those of higher plants and may contain special, often conspicuous, starch-accumulating structures called pyrenoids. Read more