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2018 Fiscal Year Final Research Report

The mechanisms of differentiation of secondary xylem cells in hardwood species

Research Project

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Project/Area Number 16K18732
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Wood science
Research InstitutionAkita Prefectural University

Principal Investigator

Kudo Kayo  秋田県立大学, 木材高度加工研究所, 客員研究員 (10757983)

Research Collaborator KIJIDANI yoshio  
TAKATA katsuhiko  
FUNADA ryo  
Project Period (FY) 2016-04-01 – 2019-03-31
Keywords広葉樹 / 道管 / 形成層活動 / 植物ホルモン / 二次木部細胞
Outline of Final Research Achievements

The study was aimed to reveal the relationship between the level and the distribution of internal plant hormones and the morphology and the pattern of secondary xylem cells in hardwood species. We developed the methods to quantified the amount of plant hormones from thin sections. We tried to develop the new system to induce the different pattern of secondary xylem. We succeed in inducing many small vessels by the combination treatment of localized heating plus the application of NAA to the dormant stem of Quercus serrata. In addition, our monitoring of phenology of leaf, penology of xylem formation and seasonal change of internal IAA level in Robinia pseudoacacia suggested that cambial activity and patterning of vessels might not be controlled by only the level and the changes of the level of internal IAA.

Free Research Field

木材組織学

Academic Significance and Societal Importance of the Research Achievements

内生植物ホルモンの量や分布に関する知見の不足は、広葉樹の二次木部細胞の分化制御機構の解明における大きな課題の一つであった。本研究課題の遂行により、自然条件下での二次木部分化と内生IAA量の変動に関する新規知見が得られた。また、今後、二次木部細胞の分化制御における植物ホルモンの役割を実験的に証明するために非常に有効な新たな定量解析方法や実験系を確立することができた。これらの知見や技術は、広葉樹のおける二次木部細胞分化制御機構の解明におけるブレイクスルーとなり、今後の研究を加速度的に進めることに貢献するものであり、広葉樹由来の木質バイオマスの生産・管理の科学的基盤となる。

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Published: 2020-03-30  

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