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STIMULATION OF APPEARANCE OF EXTRAPLASTIDIC TETRAPYRROLES BY A PHOTOOXIDATIVE TREATMENT OF THE PLASTIDS *
Author(s) -
Thomsen Björn,
OelzeKarow Heidemarie,
Schuster Christa,
Mohr Hans
Publication year - 1993
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1993.tb04957.x
Subject(s) - sinapis , plastid , phytochrome , protoporphyrin ix , chlorophyll , peroxidase , biochemistry , protoporphyrin , chemistry , stimulation , organelle , tetrapyrrole , cytosol , nitrite reductase , biology , chloroplast , botany , porphyrin , enzyme , nitrate reductase , red light , photodynamic therapy , organic chemistry , neuroscience , gene , brassica
In the mustard seedling ( Sinapis alba L.) the appearance of photodetectable phytochrome and synthesis of relatively abundant cytosolic hemoproteins (nitrite reductase, ascorbate peroxidase) are stimulated rather than impaired by a photooxidative treatment of the plastids. While the ability to synthesize protoporphyrin IX from exogenous 5‐aminolevulinic acid was preserved in the photooxidatively damaged plants, protochlorophyll and chlorophyll accumulation was no longer possible. It appears from our data that in higher plants the pathway of tetrapymole synthesis up to protoporphyrin IX is not adversely affected by a photooxidative treatment of the plastids that destroys the capacity of the organelle to synthesize chlorophyll.