Open AccessChloroplast Division and DNA Synthesis in Light-grown Wheat Leaves
Author(s) -
S. Boffey,
James E. Ellis,
G. Selldén,
Rachel M. Leech
Publication year - 1979
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.64.3.502
Subject(s) - plastid , meristem , chloroplast , biology , cell division , botany , division (mathematics) , cell , genetics , shoot , gene , arithmetic , mathematics
Light-grown 7-day-old wheat seedlings (Triticum aestivum, var. Maris Dove) showed an increase of 200% in plastids per cell between 1.7 and 4.5 centimeters from the leaf base. This increase was the result of divisions of young chloroplasts at various stages of development, and was well separated in distance, and therefore in time from the region of cell division in the basal meristem. [(3)H]Thymidine was incorporated into plastid DNA throughout the zone of plastid division, but not above it.