INFLUENCE OF THE MN(II) AND CH(4) ON THE EVOLUTION OF LIGHT-INDUCED RADICALS IN CHLOROPLASTS

Authors
Citation
V. Trif et E. Trif, INFLUENCE OF THE MN(II) AND CH(4) ON THE EVOLUTION OF LIGHT-INDUCED RADICALS IN CHLOROPLASTS, Radiation physics and chemistry, 45(6), 1995, pp. 871-876
Citations number
4
Categorie Soggetti
Nuclear Sciences & Tecnology","Chemistry Physical","Physics, Atomic, Molecular & Chemical
ISSN journal
0969806X
Volume
45
Issue
6
Year of publication
1995
Pages
871 - 876
Database
ISI
SICI code
0969-806X(1995)45:6<871:IOTMAC>2.0.ZU;2-1
Abstract
The photochemical activity of the leaves and chloroplasts of several s pecies of plants developed in gaseous hydrocarbon environments (CnH2n2) was investigated by the EPR method. The influence of different conc entrations of paramagnetic ions [Mn(II), Cu(II) and VO(II), respective ly] on the plants grown in dietary media containing these ions was als o followed by EPR spectroscopy. The contents of paramagnetic ions, low er than 0.1%, in the nutritive solutions, are the most suitable in the biosynthesis of chlorophyll-like pigments containing paramagnetic ion s in their porphyrine ring. The changes in the form, structure and pho tosensibility of the EPR signals corresponding to the free radicals, a s well as the properties of the pheophytins containing paramagnetic io ns, such as: Mn(II), Cu(II) and VO(II), were related to the photochemi cal synthesis in gaseous hydrocarbon environments.