Abstract
Gene Regulation in Developing Chloroplasts Disentangled.
Highlights
Chotewutmontri and Barkan report in this issue [8] plastid transcriptome and translatome profiles at several points during the proplastid to chloroplast transition in young maize leaves, thereby revealing developmental patterns of protein production from each plastid gene and the relative contributions of mRNA level and translation rate in establishing them (Fig 1)
Distant cousins of photosynthetic bacteria reside in plant cells where, as organelles called plastids, they give color to fruit and flowers, make starch in roots, and carry out photosynthesis in leaves
Photosynthesis subunits are produced in precise stoichiometries which, in the green alga Chlamydomonas reinhardtii, are brought about by feedback controls at the level of translation [3]
Summary
Chotewutmontri and Barkan report in this issue [8] plastid transcriptome and translatome profiles at several points during the proplastid to chloroplast transition in young maize leaves, thereby revealing developmental patterns of protein production from each plastid gene and the relative contributions of mRNA level and translation rate in establishing them (Fig 1). Plastids acquire these tissue-specific functions during plant development by undergoing programed differentiation from totipotent proplastids of meristematic tissues. The differentiation of chloroplasts, the photosynthetic plastid in green tissues, requires expression of plastid genes encoding polypeptide subunits of the photosynthesis apparatus and components of the organellar gene expression system.
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