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Thylakoid differentiation in endocyanelles
Author(s) -
Marten Sabine,
Stamm Reinhard,
Brandt Peter
Publication year - 1983
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1983.tb00763.x
Subject(s) - botany , photosynthesis , synechococcus , thylakoid , biology , chlorophyll a , cyanobacteria , oxygen evolution , chlorophyll , darkness , chemistry , chloroplast , biochemistry , bacteria , gene , genetics , electrode , electrochemistry
Cyanophora paradoxa Korshikov synchronized autotrophically in a light‐dark regime of 14 h light and 10 h dark divides in the last two hours of the dark period. The division rate of the free‐living blue‐green alga, Synechococcus leopoliensis Raciborski, at identical culture conditions (24°C; 32 W m −2 ) is only slightly lowered in the light period. The comparison of thylakoid differentiation in the endocyanelles of Cyanophora paradoxa and in Synechococcus leopoliensis during the light‐dark regime yields (1) the same ensemble of pigment‐protein complexes in both organisms, (2) comparable syntheses of chlorophyll and phycobilins of Cyanophora paradoxa grown under 32 W m −2 and of Synechococcus leopoliensis grown under light intensities below 9.2 W m −2 , and (3) identical photosynthetic oxygen evolution during the light period of the light‐dark regime with minima at the beginning, in the middle (6th–7th h), and at the end of the light period. In both organisms this stage‐specific oxygen evolution is inhibited by treatment with chloroamphenicol. Cycloheximide, however, causes no significant alterations. Results are discussed in view of the endosymbiotic theory.