Takashi Shimada

Assistant Professor, Graduate School of Horticulture, Chiba University *Profile is at the time of the award.

2022Inamori Research GrantsBiology & Life sciences

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Research topics: Elucidation of the mechanism of stress tolerance via lipid droplets in plants

Keyword

Summary: Lipid droplets are the organelle to store neutral lipids. Plant seeds have a lot of lipid droplets for energy source of germination. On the other hand, leaves also have lipid droplets; however, the functions of leaf-lipid droplets are poorly known.
We found that leaf-lipid droplets were induced and formed during various stress conditions. Additionally, we also found that there were various proteins on leaf-lipid droplets. In this study, we try to resolve the molecular mechanisms and physiological functions of leaf-lipid droplets; do the leaf-lipid droplets and their proteins contribute to plant stress tolerance?

Message

I have been studying plant oil droplets since I was a student. It has been suggested that plant oil droplets have a variety of roles beyond energy storage, but this has yet to be proven. Through this research, I will try to unravel some of the functions of oil droplets.

Outline of Research Achievments

To clarify the physiological functions of plant lipid droplets, we analyzed lipid-droplet-localized proteins. We also analyzed stress tolerance using an Arabidopsis mutant that excessively accumulates lipid droplets on the leaves. We discovered myosin-binding proteins (MYOBs) as lipid-droplet-localized proteins, and published our findings in a paper.

Omata Y, et al. (2024) Lipid droplets in Arabidopsis thaliana leaves contain myosin-binding proteins and enzymes associated with furan-containing fatty acid biosynthesis. Frontiers in Plant Science 15 https://doi.org/10.3389/fpls.2024.1331479

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