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DIFFERENTIAL EXPRESSION OF NUCLEAR AND PLASTID GENES INDUCED BY RED LIGHT AND GIBBERELLIC ACID DURING GERMINATION OF SPORES OF THE FERN ANEMIA PHYLLITIDIS
Author(s) -
Raghavan V.
Publication year - 1993
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1993.tb13816.x
Subject(s) - gibberellic acid , spore , biology , germination , plastid , fern , gibberellin , botany , nuclear gene , chloroplast , gene expression , gene , far red , phytochrome , spore germination , genetics , red light , genome
Germination of spores of the fern Anemia phyllitidis in red light or in the dark in the presence of gibberellic acid in the medium is accompanied by the synthesis of chlorophyll. Spores incubated in the dark in the absence of the hormone neither germinate nor accumulate the pigment. mRNA levels of plastid‐encoded photosynthetic genes ( rbc L and psb A) increase maximally in photo‐induced spores and at intermediate to low levels in hormone‐induced and dark‐incubated spores. On the other hand, transcripts for the nuclear‐encoded rbc S gene appear only in photo‐induced spores. The results show that light and hormonal signals promote differential gene expression at the mRNA level during germination of spores.