Journal Article

A MADS Box Gene Homologous to <i>A G</i> is Expressed in Seedlings as well as in Flowers of Ginseng

Youn-Sung Kim, Haeng-Soon Lee, Mi-Hee Lee, Ook-Joon Yoo and Jang-Ryol Liu

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 39, issue 8, pages 836-845
Published in print August 1998 | ISSN: 0032-0781
Published online August 1998 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/oxfordjournals.pcp.a029442
A MADS Box Gene Homologous to A G is Expressed in Seedlings as well as in Flowers of Ginseng

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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To study the flower development of ginseng, a MADS box cDNA (GAG2) was isolated and characterized. A comparison of the deduced amino acid sequence of GAG2 with the sequences of other MADS box proteins showed higher amino acid identities with AG (71%) from Arabidopsis thaliana, which is specifically expressed in stamens and carpels of flowers than with AGL genes (30 to 60%), suggesting that GAG2 is a ginseng homologue of AG. However northern blot analysis showed that GAG2 was expressed in seedlings. As the ginseng plant grew, the expression of GAG2 was confined to flowers. In situ hybridization experiments showed that GAG2 transcripts accumulated in the three inner whorls of flowers and in the cells surrounding the developing embryo sac. Temporal and spatial differences between GAG2 expression and AG imply that GAG2 alone is not sufficient to determine the identities of sexual organs of ginseng flowers and has additional or unique functions which differ from those of AG.

Keywords: Agamous; Flower development; MADS box; Panax ginseng

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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