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CND41, a chloroplast nucleoid protein that regulates plastid development, causes reduced gibberellin content and dwarfism in tobacco
Author(s) -
Nakano Takeshi,
Nagata Noriko,
Kimura Takuma,
Sekimoto Masayo,
Kawaide Hiroshi,
Murakami Shinya,
Kaneko Yasuko,
Matsushima Hisashi,
Kamiya Yuji,
Sato Fumihiko,
Yoshida Shigeo
Publication year - 2003
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 - 10.1034/j.1399-3054.2003.1170116.x
Subject(s) - gibberellin , biology , chloroplast , dwarfism , plastid , nucleoid , wild type , phenotype , gene , leafy , botany , microbiology and biotechnology , genetics , mutant , escherichia coli
CND41, a DNA binding protein of chloroplast nucleoids, may function as a negative regulator of chloroplast gene expression. The reduction of CND41 in an antisense transformant accelerated plastid development in shoot apex cells and early young leaves, and caused a dwarf phenotype and altered leaf morphology. Plant height and leaf shape could be restored almost to those of the wild type by application of gibberellins (GAs), clearly indicating that a reduction in GA content was a prime cause of the dwarf phenotype in CND41 antisense transformants. The transformants had reduced endogenous levels of active gibberellin (GA 1 ), a biologically active GA, compared to those of wild‐type plants. Possible relationships between chloroplast development affected by CND41 function and GA biosynthesis are discussed.