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Temporal Pattern of Gene Expression in Cotyledons of Mustard ( Sinapis alba L.) Seedlings
Author(s) -
Wenng A.,
Batschauer A.,
Ehmann B.,
Schäfer E.
Publication year - 1990
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1990.tb00155.x
Subject(s) - sinapis , phytochrome , darkness , gene expression , gene , biology , messenger rna , photosystem ii , cotyledon , botany , microbiology and biotechnology , biochemistry , red light , photosynthesis , brassica
The time course of appearance of competence to phytochrome (P fr ) was studied in cotyledons of mustard ( Sinapis alba L.) with regard to the light‐mediated accumulation of mRNAs encoding for SSU, CAB and the 23 kDa protein of the oxygen evolving complex of photosystem II (OEC). For each gene family a specific starting point of P fr ‐induced mRNA accumulation was observed (SSU: 42 h; CAB: 36 h; OEC: 30 h). An increase of SSU‐mRNA levels can be detected 24 h after sowing in dark‐grown seedlings whereas for OEC the time points for the increase of mRNA are the same whether the seedlings are kept in darkness or induced by light via P fr . For all gene families a responsiveness to P fr (coupling point) could be demonstrated before the starting points. The coupling points are also gene specific (SSU: ca. 12 h; CAB and 23 kDa peptide of OEC: ca. 24 h). The responsiveness to light before the starting point indicates that the light‐induced signal must be stored.