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Ultraviolet Inactivation and Photoreactivation of Chloroplast Development in Euglena Without Cell Death *
Author(s) -
LYMAN HARVARD,
EPSTEIN H. T.,
SCHIFF JEROME
Publication year - 1959
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1959.tb04367.x
Subject(s) - photolyase , chloroplast , euglena gracilis , euglena , ultraviolet , strain (injury) , ultraviolet light , chlorophyll , biology , botany , chemistry , biophysics , biochemistry , photochemistry , gene , materials science , optoelectronics , dna repair , anatomy
SYNOPSIS. Exposure to non‐lethal doses of ultraviolet completely inactivates chloroplast development and chlorophyll synthesis in Euglena gracilis var. bacillaris and in the Z strain. Treatment with visible light immediately following UV reverses the inactivation completely. The presence of chloroplasts is not necessary for this inactivation since similar results are obtained with light‐grown cells (containing chloroplasts) and dark‐grown cells (lacking chloroplasts).