Tokyo Gakugei University

Kanagawa University

University of Lyon

The University of Tokyo Graduate School of Science

Summary of Presentations

To answer the above question, a research group led by Associate Professor Ferjani Ali of The University of Tokyo, Associate Director Nobutaka Mitsuda of AIST, Professor Yuichi Tsukatani of The University of Tokyo, Professor Shinichiro Sawa of Kumamoto University, and Professor Hamant Olivier of INRAE Lyon, studied the mechanical involvement of vascular bundle The research group led by Prof. Sawa of Kumamoto University and Prof. Hamant Olivier of INRAE Lyon studied the mechanical involvement of vascular tissue inside stems during stem growth to answer the above question. In the process, they discovered a new lineage that causes stem cracks in a large screening conducted by Deputy Research Director Mitsuda and his colleagues.

We then undertook a detailed analysis of the morphology of each cell in the internal stem tissue of this lineage. As a result, we noticed the importance of the arrangement of vascular bundles in the interior of the stem.

The results of this research have been published in the international journal DEVELOPMENT (online edition) on February 7, 2023 at 00:00 am (GMT).

Figure: (A) Photograph of a plantlet one month after sowing. Scale: 30 mm.(B) Photograph of stem cracks. Scale: 10 mm.(C) Microscopic image of a transverse section of a stem. Fiber cells are stained red in the wild type. In vascular bundles, they are mixed with ducts. Scale: 100 μm. (D) Microscopic images of stem cracks and transverse sections of pNST3:IDD9:SRDX clv3 lines. Scale: 1 mm (left, center) and 100 μm (right). Asterisks in the section images indicate cracks. (C,D) Number of vascular bundles in transverse section images of stems: 7 (C left), 8 (C right), 16 (D).

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