Takuji Ohyama

Tokyo University of Agriculture

Takuji Ohyama is a Professor of Faculty of Applied Biosciences, Department of Agricultural Chemistry, Tokyo University of Agriculture (2017 -present). He obtained a Ph.D. degree in agriculture from the University of Tokyo in 1980, and got an academic position in Niigata University in 1982. He has been a Professor of Faculty of Agriculture at Niigata University from 1982 till 2017. He has also served as Dean of Graduate School of Science and Technology at Niigata University (2010-2014) and Dean of Faculty of Agriculture at Niigata University (2006-2010). He was a president of Japanese Society of Soil Science and Plant Nutrition during 2007-2009. His research interests are: nitrogen fixation and metabolism in soybean plants, new technology of deep placement of slow release nitrogen fertilizers for soybean cultivation, and nitrogen and carbon metabolism in tulip, curcuma, and cucumber. He is also interested in use of stable isotopes and positron emitting radioisotopes.

2books edited

6chapters authored

Latest work with IntechOpen by Takuji Ohyama

This book provides up-to-date knowledge of root biology. Most plants have roots, which anchor the plant in the soil and physically support the above-ground parts of the plant. In addition, roots absorb water and nutrients from the soil and transport this to the shoot. Roots grow by cell proliferation in the meristem in the root tip. The cells differentiate into the epidermis, cortex, and stele. Water and nutrients are absorbed through the cell membrane of the epidermis and are transported to the above-ground parts via xylem vessels. The root growth and functions are affected by various abiotic and biotic conditions, such as levels of water, salt, acid stresses, and presence of soil diseases. However, some beneficial microorganisms such as rhizobia and mycorrhizal fungi help plant growth.

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