Expression and developmental function of the 3-ketoacyl-ACP synthase2 gene in Arabidopsis thaliana

Hirokazu Hakozaki, Jong In Park, Makoto Endo, Yoshinobu Takada, Tomohiko Kazama, Yoshimitsu Takeda, Go Suzuki, Makiko Kawagishi-Kobayashi, Masao Watanabe

研究成果: Article査読

10 被引用数 (Scopus)

抄録

The 3-ketoacyl-ACP synthase (KAS) II is a fatty-acid-related enzyme which catalyzes the elongation of 16:0-acyl carrier protein (ACP) to 18:0-ACP in plastids. The fatty acid biosynthesis 1-1 (fab1-1) mutant of Arabidopsis thaliana is partially deficient in its activity of Arabidopsis thaliana 3-ketoacyl-ACP synthase 2 (AtKAS2), and its phenotype has been intensively studied in connection with the chilling resistance and fatty acid composition. In this study, we used the T-DNA insertion mutant of AtKAS2 to examine its possible role in plant development. Reverse transcription (RT)-PCR showed that the AtKAS2 gene was expressed in various plant organs, except for roots, and was highly expressed in siliques. The fusion of β-glucuronidase (GUS) to the AtKAS2 promoter demonstrated that the promoter was active in various tissues such as embryos, stomatal guard cells, inflorescences and pollen grains. We were not able to identify atkas2 homozygous mutant adult plants in heterozygous mutant progeny. Phenotypic and genetic analyses showed that disruption of the AtKAS2 by T-DNA insertion caused embryo lethality, and the development of the embryos was arrested at the globular stage. Taken together, our results suggest that AtKAS2 is required for embryo development in Arabidopsis during the transition from the globular to the heart stage.

本文言語English
ページ(範囲)143-152
ページ数10
ジャーナルGenes and Genetic Systems
83
2
DOI
出版ステータスPublished - 2008

ASJC Scopus subject areas

  • 分子生物学
  • 遺伝学

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