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Any of several cytoplasmic organelles, such as chloroplasts, that contain genetic material, have a double membrane, and are often pigmented. Plastids are found in plants, algae, and certain other eukaryotic organisms and have various physiological functions, such as the synthesis and storage of food.

[From Greek plastis, plastid-, feminine of plastēs, molder, from plastos, molded; see plastic.]

plas·tid′i·al (plăs-tĭd′ē-əl) adj.


relating to a plastid
References in periodicals archive ?
Another 22 articles summarize the current status of such areas as transporters of the plastid envelope and their role in linking plastidial with cytosolic metabolism, signaling networks in sensing phosphate availability in plants, the role of mechanical forces in plant morphogenesis, sex chromosomes in land plants, and evolution and diversity in plant cell walls from algae to flowering plants.
Descriptions of the stromules and plastidial dimorphism, made in this study, can be included with other known epidermal adaptive strategies (e.