Role of epidermis in twisting growth of axial organs

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14755
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Plant molecular biology/Plant physiology
• Research Institution: Nara Institute of Science and Technology
• Principal Investigator: Hashimoto Takashi 奈良先端科学技術大学院大学, バイオサイエンス研究科, 教授 (80180826)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: ねじれ / 微小管 / 左右性 / シロイヌナズナ / 表皮細胞 / 根

Outline of Final Research Achievements

In this study, microtubule-regulating factors and cell elongating-regulating factors were expressed cell-type specifically in Arabidopsis roots, and two models (the epidermis leading model and the growth compensatory model) on organ twisting with defined chilarity were tested.
When several mutant tubulins were expressed specifically at root epidermis, root epidermis grew normally and overall root growth and morphology were almost normal. When katanin and SAUR9 were used to generate growth differences between cortex and epidermis, growth inhibition and slanting growth were marginally observed. These results do not support simply either one of the proposed models.

Free Research Field

植物細胞生物学