Molecular and Chemical Life Science :
Molecular and Network Genomics


Assistant Professor Masanori Izumi
Campus Katahira campus
Laboratory Molecular Genetics and Physiology
Tel +81-22-214-5745
E-mail m-izumi@ige.tohoku.ac.jp
Website http://www.ige.tohoku.ac.jp/genome/
Google Scholar


Research Gate


I am trying to the elucidation of molecular mechanisms for chloroplast degradation in plants.

March 2012 PhD, Graduate School of Agricultural
Sciences, Tohoku University
April 2012- March 2014 Postdoctoral research fellowship
for young scientists from the Japan
Society for the Promotion of Science
(JSPS), Graduate School of Life
Sciences, Tohoku University
April 2014- Assistant Professor, Frontier Research
Institute for Interdisciplinary Sciences
(FRIS), Tohoku University
August 2015 -December 2015 Visiting Researcher, University of Oxford, UK
Selected Publications
Izumi M, Ishida H, Nakamura S, Hidema J (2017) Entire photodamaged chloroplasts are transported to the central vacuole by autophagy. The Plant Cell vol.29: pp.377-394 
Izumi M, Hidema J, Wada S, Kondo E, Kurusu T, Kuchitsu K, Makino A, Ishida H. (2015) Establishment of monitoring methods for autophagy in rice reveals autophagic recycling of chloroplasts and root plastids during energy limitation. Plant Physiology vol. 167: pp. 1307-1320
Ishida H, Izumi M, Wada S, Makino A (2014) Roles of autophagy in chloroplast recycling. Biochimica et Biophysica Acta - Bioenergetics vol.1837: pp.512-521
Izumi M, Hidema J, Makino A, Ishida H (2013) Autophagy contributes to nighttime energy availability for growth in Arabidopsis. Plant Physiology vol.161: pp.1682-1693
Ono Y, Wada S, Izumi M, Makino A, Ishida H (2013) Evidence for contribution of autophagy to Rubisco degradation during leaf senescence in Arabidopsis thaliana. Plant, Cell and Environment vol.36: pp.1147-1159
Izumi M, Tsunoda H, Suzuki Y, Makino A, Ishida H(2012) RBCS1A and RBCS3B, two major members within the Arabidopsis RBCS multigene family,function to yield sufficient Rubisco content for leaf photosynthetic capacity. Journal of Experimental Botany vol.63: pp.2159-2170
Izumi M, Wada S, Makino A, Ishida H (2010) The autophagic degradation of chloroplasts via Rubisco-containing bodies is specifically linked to leaf carbon status but not nitrogen status in Arabidopsis. Plant Physiology vol.154:pp.1196-1209
Wada S, Ishida H, Izumi M, Yoshimoto K, Ohsumi Y, Mae T, Makino A (2009) Autophagy plays a role in chloroplast degradation during senescence in individually darkened leaves. Plant Physiology vol.149:pp.885-893  
Ishida H, Yoshimoto K, Izumi M, Reisen D, Yano Y, Makino A, Ohsumi Y, Hanson MR, Mae T (2008) Mobilization of Rubisco and stroma-localized fluorescent protein of chloroplasts to the vacuole by an ATG gene-dependent autophagic process. Plant Physiology vol.148:pp.142-155


Activities in Academic Societies

Japanese Society of Soil Science and Plant
Nutrition (JSSSPN), Japanese Society of Plant Physiologists (JSPP), Japanese
Society for Biological Sciences in Space (JSBSS)

Recent Activities

Chloroplasts are photosynthetic organelles in plant cells. We have demonstrated that chloroplasts and their proteins are consumed via an intracellular garbage process termed autophagy, by which membrane-sequestered proteins and organelles are delivered to the vacuole for digestion. The aim of my study is to elucidate the molecular basis of chloroplast digestion mechanisms including autophagy, and to develop the achievements into the enhancement of photosynthetic capacity and crop productivity.

Message to Students

Plants have unique “power” such as photosynthetic conversion of solar energy and atmospheric carbon dioxide into chemical energy and carbohydrates. Please realize that there are a lot of mysteries in the power of our neighboring plants.