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Laboratory of Environmental Plant Biotechnology

Since plants are sessile, plants must adapt to environmental conditions. We have been studing plant functions associated with environmental adaptation at the molecular level and their application to plant engineering.

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What's new!

2013-03-08
Recent publications were added!
Igarashi et al (2013) Plant Cell Physiol
Toda and Toriyama (2013) Rice
Tsuda et al (2013) Plant Cell Physiol
Yoshimura et al (2012) Plant Biotechnol
Toda et al (2012) Plant J
Osabe et al (2012) Int J Mol Sci
Kobayashi et al (2012) Nucleic Acids Res
Nigorikawa et al (2012) Rice
Tsuda et al (2011) Plant Cell
2011-10-27
Recent publications were added!
Honma et al (2011) Curr Genet
Ito et al (2011) Plant Sci
Ariizumi and Toriyama (2011) Annu Rev Plant Biol
Takasugi and Ito (2011) Plant Signal Behav
Fujii et al (2011) BMC Genomics
Ito et al (2011) Plant J
2011-2-23
Recent publications were added!
Itabashi et al (2011) Plant J
Kato et al (2010) Plant Biotech
Sakaguchi et al (2010) Plant J
Kojima et al (2010) Plant Biotech
Fujii et al (2010) BMC Genomics
Fujii et al (2010) Plant Cell Physiol
Miyashita et al (2010) Plant Sci
Toda et al (2010) Rice Genet NewsLett
2010-2-1
A link to Tohoku University Research Profile Search was made!
2009-11-13
Recent publication was added!
Wu et al (2009) Plant Biotech
2009-5-27
Recent publications were added!
Fujii and Toriyama (2009) PNAS
Tsuda et al (2009) Plant Sci
2009-3-18
English page was born!

Research projects

(1) Cytoplasmic male sterility in rice

Cytoplasmic male sterility (CMS) is a maternally inherited trait that results in the inability to produce fertile pollen and is often associated with an unusual open reading frame (ORF) found in mitochondrial genomes. In rice, various types of CMS, such as BT-CMS originating from Chinsurah Boro II, LD-CMS from Lead Rice, WA-CMS from a wild abortive line and HL-CMS from Hong Lian wild rice, have been identified. In these CMS lines, pollen fertility is recovered by a nuclear-encoded gene known as a fertility restorer gene (Rf). We have been studying molecular mechanisms of cytoplasmic male sterility by focusing on the functions of the unusal ORFs and the Rf genes and their interactions.

Recent publications
Itabashi et al (2011) Plant J
Kojima et al (2010) Plant Biotech
Fujii et al (2010) BMC Genomics
Fujii et al (2010) Plant Cell Physiol
Fujii et al (2009) Plant Cell Physiol
Fujii and Toriyama (2009) PNAS
Itabashi et al (2009) Plant Cell Rep
Kazama et al (2008) Plant J
Fujii and Toriyama (2008) Plant Cell Physiol

(2) Plant engineering

We have been developing plants which aquire enhanced stress and insect resistance, produce useful proteins, or are suitable for biofuel production.
Drought stress has been found to be one of the major causes of reduced crop yield, and great efforts have been made to breed drought-tolerant crop varieties. As the most important world food crop, cultivated rice (Oryza sativa L.) demands tremendous amounts of water during growth, which results in a number of production challenges. Rice is also a popular model plant for studies of monocots. Improvements in the tolerance of cereal plants to abiotic stress are important when the efficiency of food production is to be increased. Breeding of transgenic rice cultivar with drought tolerance can help increase and stabilize crop yield under stress environments. We have generated transgenic rice plants with enhanced drought tolerance.

Link to Tohoku University Research Profile Search

Recent publications
Kato et al (2010) Plant Biotech
Wu et al (2009) Plant Biotech
Wu et al (2009) Plant Cell Rep

(3) Shoot development in rice

In higher plants the shoot apical meristem (SAM) is generated during embryogenesis and maintained throughout their life cycle. Aboveground lateral organs such as leaf and flower are successively generated from flanks of the SAM. Thus, the mechanisms of SAM formation and maintenance, and organ formation from the SAM are central questions of plant development to be addressed. KNOX class 1 homeobox genes, which are expressed in the SAM and down-regulated at the flanks of the SAM where lateral organs arise, play a crucial role in formation and maintenance of the SAM. Since ectopic expression of the KNOX genes in leaf results in abnormal leaf development, the SAM-specific expression of the KNOX genes is essential for normal plant development. We have been studying mechanisms of the SAM-specific expression of the KNOX genes by means of forward and reverse genetic approaches.

Recent publications
Takasugi and Ito (2011) Plant Signal Behav
Ito et al (2011) Plant J
Miyashita et al (2010) Plant Sci
Tsuda et al (2009) Plant Sci
Ito and Kurata (2008) Plant Sci

Publications

Contact

Professor Kinya TORIYAMA
Associate Prof. Yukihiro ITO
Assistant Prof. Tomohiko KAZAMA
E-mail: torikin(at sign)m.tohoku.ac.jp

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