Department of Biosphere Resources Science

Division of Bioresource Production and Agroecology

LAB. OF CROP SCIENCE

Fax: +81-52-789-5558
Prof. KONDO, Motohiko D. Agr. chokai@
Assoc. Prof. YANO, Katsuya D. Agr. kyano@
Asst. Prof. SUGIURA, Daisuke D. Sci. dsugiura@

Our research interest covers physiology and ecology of crop plants at various scales from the molecular to the field level. Our goal is to improve crop yields establishing sustainable agriculture. Our major research focus are;

  1. Sink-source relationship
  2. Crop response to environment, such as elevated atmospheric CO2
  3. Crop-microorganisms symbiosis
  4. Nutrient acquisition mechanisms by root system

Recent publications:

  1. Kondo M., Maeda H., Goto A., Nakano H., Kiho N., Makino T., Sato M., Fujimura S., Eguchi T., Hachinohe M., Hamamatsu S., Ihara H., Takai T., Arai-Sanoh Y. and Kimura T. (2015) Exchangeable Cs/K ratio in soil is an index to estimate accumulation of radioactive and stable Cs in rice plant. Soil Sci. Plant Nutr. 61: 133-143.
  2. Kondo M., Makino T., Eguchi T., Goto A., Nakano H., Takai T., Arai-Sanoh Y. and Kimura T. (2015) Comparative analysis on relationship between Cs and K in soil and plant parts toward control of Cs accumulation in rice. Soil Sci. Plant Nutr. 61: 144-151.
  3. Ohsumi A., Takai T., Ida M., Yamamoto T., Arai-Sanoh Y., Yano M., Ando T. and Kondo M. (2011) Evaluation of yield performance in rice near-isogenic lines with increased spikelet number. Field Crop. Res. 120: 68-75.
  4. Laza M.R., Kondo M., Ideta O., Barlaan E. and Imbe T. (2010) Quantitative trait loci for stomatal density and size in lowland rice. Euphytica 172: 149–158.
  5. Sekiya, N., Araki, H. and Yano, K. (2011) Applying hydraulic lift in an agroecosystem: forage plants with shoots removed supply water to neighboring vegetable crops. Plant Soil 341, 39-50.
  6. Sekiya, N. and Yano, K. (2010) Seed P-enrichment as an effective P supply to wheat. Plant Soil 327, 347-354.
  7. Sekiya, N. and Yano, K. (2008) Stomatal density of cowpea correlates carbon isotope discrimination in different phosphorus, water and CO2 environments. New Phytol. 179, 799-807.

LAB. OF PLANT RESOUCES AND ENVIRONMENT

Fax: +81-52-789-4064
Prof. TANIGUCHI, Mitsutaka D. Agr. taniguti@
Asst. Prof. OI, Takao D. Agr. oitaka@
Photo1-2-2
Chloroplasts (red) and actin filaments (green) in mesophyll (M) and bundle sheath (BS) cells of finger millet, a C4 plant, as visualized by immuno-fluorescence confocal laser microscopy.

Plant resources are defined as various kinds of utilizable plants in addition to crop species. The research objective of this laboratory is to explore the structure, function and environmental responses of higher plants with the aid of experimental anatomy, electron microscopy and molecular biology for the basis of exploitation of plant resources. In recent years special efforts have been made for the differentiation mechanism of photosynthetic cells and epidermal cells in C4 plants.

The current research projects are;

  1. Mechanisms of chloroplast movement in response to environmental stresses
  2. Differential sensitivity of C4 photosynthetic cells to salinity stress
  3. Salt excretion mechanism from salt glands
  4. Mechanisms of metabolite transport across chloroplast envelope membranes

Recent publications:

  1. Oi T, Miyake H, Taniguchi M. (2014) Salt excretion through the cuticle without disintegration of fine structures in the salt glands of Rhodes grass (Chloris gayana Kunth). Flora 209: 185-190.
  2. Oi T, Hirunagi K, Taniguchi M, Miyake H (2013) Salt excretion from the salt glands in Rhodes grass (Chloris gayana Kunth) as evidenced by low-vacuum scanning electron microscopy. Flora 208: 52-57.
  3. Omoto E, Nagao H, Taniguchi M, Miyake H. (2013) Localization of reactive oxygen species and change of antioxidant capacities in mesophyll and bundle sheath chloroplasts of maize under salinity. Physiologia Plantarum 149: 1-12.
  4. Taniguchi M, Miyake H (2012) Redox-shuttling between chloroplast and cytosol: integration of intra-chloroplast and extra-chloroplast metabolism. Current Opinion in Plant Biology 15: 252-260.
  5. Maai E, Shimada S, Yamada M, Sugiyama T, Miyake H, Taniguchi M (2011) The avoidance and aggregative movement of mesophyll chloroplasts in C4 monocots in response to blue light and abscisic acid. Journal of Experimental Botany 62: 3213-3221.

LAB. OF FOREST ENVIRONMENT AND RESOURCES

FAX: +81-52-789-4055
Prof. TAKENAKA, Chisato D. Sci. chisato@
Assoc. Prof. YAMAMOTO, Kazukiyo D. Agr. kazukiyo@
Asst. Prof. TOMIOKA, Rie D. Agr. tomiokar@

Forest ecosystems have been globally recognized as a sustainable resource. In spite of this, environmental changes such as global warming and environmental pollution as well as unsuitable forest management continue to pose a serious problem. The research objective of this laboratory is the development of optimum sustainable management of forest ecosystems with regard to economics and environment. The studies are based on remote sensing, geographic information system (GIS), environmental chemistry, plant physiology and forest measurement.

The following research projects are in progress;

  1. Mathematical modeling for sustainable forest management.
  2. Evaluation of forest resources and environment using GIS and remote sensing.
  3. Development of a new methodology for forest measurement.
  4. Diagnosis of forest decline using physiological symptom found in affected plants.
  5. Nutrient cycle in forest ecosystem affected by environmental changes.
  6. Phytoremediation of metal-contaminated soils using trees.
  7. Behavior of radiocaesium in forest ecosystem.

Recent publications:

  1. Miyahara M, Takenaka C. Tomioka R. and Ohta T., (2011) Root responses of Siberian larch to different soil water conditions. Hydrological Research Letters 5:93-97.
  2. Hayakawa N., Tomioka R., Takenaka C. (2011) Effects of calcium on cadmium uptake and transport in the tree species Gamblea innovans Soil Science and Plant Nutrition 57(5):691-695.
  3. Takenaka C., Hayakawa N., Kobayashi M., Kanaya S. and Tomioka R. (2011) Accumulation and transport of heavy metals in Gamblea innovans Jpn. J. Forest Environment, 53: 1-15.
  4. Yamamoto K, Takahashi T., Miyachi Y., Kondo N., Morita S., Nakao M., Shibayama T., Takaichi Y., Tsuzuku M. and Murate N. (2011) Estimation of mean tree height using small-footprint airborne LiDAR without a digital terrain model. Journal of Forest Research 16: 425-431
  5. Yamamoto K., Kobayashi K., Nonoda T., Inoue A. and Mizoue N. (2010) Effect of settings of digital fisheye photography to estimate relative illuminance within forest under low light conditions. Journal of Forest Research 15: 283-288.

LAB. OF FOREST ECOLOGY AND PHYSIOLOGY

Fax: +81-52-789-5014
Prof. TOMARU, Nobuhiro D. Agr. tomaru@
Assoc. Prof. NAKAGAWA, Michiko D. Sci. miko@
Lecturer OGAWA, Kazuharu D. Agr. kazogawa@

Showy flowers of a rare tree species, Magnolia stellata, in satoyama landscape in early spring

Studies of our laboratory cover a wide range of research themes closely relating to forest ecology, forest genetics, and tree ecophysiology. The research projects can be divided into the following four major topics concerning forests and forest trees:

  1. Forest structure and dynamics;
  2. Genetic diversity and population genetic structure within species;
  3. Reproduction and its processes such as flowering, pollination, fruiting, and seed dispersal; and
  4. CO2 gas exchange and dry matter production.

Recent publications:

  1. Wang, H., Matsushita, M., Tomaru, N., and Nakagawa, M. (2015) Differences in female reproductive success between female and hermaphrodite individuals in the subdioecious shrub Eurya japonica (Theaceae). Plant Biology: 17: 194-200.
  2. Ogawa, K. (2015) Mathematical consideration of the pipe model theory in woody plant species.  Trees - Structure and Function 29: 695-704
  3. Tokumoto, Y., Sakai, S., Matsushita, M., Ohkubo, T., and Nakagawa, M. (2014) Spatiotemporal variability in the reproductive success of the continually flowering shrub Dillenia suffruticosa in Borneo. Biotropica 46: 583-590.
  4. Inanaga, M., Nakanishi, A., Torimaru, T., Nishimura, N., and Tomaru, N. (2014) Distance-dependent but genetically random mating in a Japanese beech (Fagus crenata) population. Botany 92: 795-803.
  5. Yoichi, W. and Tomaru, N. (2014) Patterns of geographic distribution have a considerable influence on population genetic structure in one common and two rare species of Rhododendron (Ericaceae). Tree Genetics & Genomes 10: 827-837.
  6. Ogawa, K. (2012) Mathematical analysis of age-related changes in leaf biomass in forest stands. Canadian Journal of Forest Research 42: 356-363.
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