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Izuta Laboratory
Tokyo University of Agriculture and Technology

Current Research Activities in Izuta Laboratory

Effects of Ozone on Japanese Crops and Trees

Ozone (O3), a component of photochemical oxidants, is considered to be one of the important factors
relating to the reduction in growth and yield of crops and tree dieback or forest decline observed in Japan
because relatively high concentrations of O3 above 100 ppb are detected in Japan.
We are investigating the effects of O3 on growth, physiological functions and quality of Japanese crops
using the new ozone-exposure chambers (left photograph) at Field Musium Tama Hill of Tokyo University
of Agriculture and Technology .
At the present time, limited information is available for the effects of O3 on Japanese forest tree species.
Using the open-top chambers (right photograph) at Akagi Testing Center, Central Institute of Electric Power Industry,
we are experimentally investigating the effects of O3 on growth, gas exchange rates, chlorophyll contents,
enzymes such as Rubisco, nutrient status and structure of Japanese forest tree species such as Fagus crenata seedlings.
Also, we are investigating the effects of O3 and nitrogen load or elevated CO2, singly and in combination,
on growth, gas exchange rates, chlorophyll contents, concentration and activity of enzymes such as Rubisco
and nutrient status of Japanese forest tree species.

  


Effects of Aerosol on Japanese Forest Tree Species

Recently, transboundary air pollution is one of the serious environmental problems in East Asia.
Aerosol is one of transbundary air pollutants in Asia.
There is a possibility that aerosol such as black carbon and ammonium sulfate particles
will induce adverse effects on plants such as crops and trees.
In our laboratory, we are investigating the effects of black carbon and ammonium sulfate particles
on phenological characteristics, growth, leaf gas exchange rates, chlorophyll contents, enzymes
such as Rubisco and nutrient status of Japanese forest tree species.

Effects of Acid Deposition on Japanese Forest Tree Species

Atmospheric deposition of nitrogen is increasing year by year, and may induce nitrogen saturation and
excessive soil nitrogen in Japanese forest ecosystems. There is a possibility that excessive nitrogen will
induce several detrimental effects on Japanese and Asian forest tree species and cause tree dieback
and/or forest decline in the near future. Therefore, we must investigate the effects of acid deposition
on many Japanese and Asian forest tree species. In our laboratory, we are investigating the effects of
excessive nitrogen and soil acidification on phenological characteristics, growth, leaf gas exchange rates,
chlorophyll contents, enzymes such as Rubisco and nutrient status of Japanese forest tree species.

Members of Izuta Laboratory (2024)

Prof. Dr. Takeshi Izuta

Graduate students
Doctral course　
　 Kei Takahashi

Master course　
　 Kosuke Mito
　 Keita Nakajima

　 Taido Nonaka
　 Maria Matsumoto

Undergraduate students　
　 Koki Takano

Publications (2001-2024)

Ariura, R., Matsumoto, M., Li, J, Fuse, T., Aoki, T., Zhang, Y., Kinose, Y., Yamaguchi, M., Izuta, T. and Watanabe, M. (2023)
Effects of elevated ozone and carbon dioxide on the dynamic photosynthesis of Fagus crenata seedlings
under variable light conditions.
Science of the Total Environment, 891, 164398.

Tanaka, R., Chiu, C.W., Gomi, T., Matsuda, K., Izuta, T. and Watanabe, M. (2023)
Stomatal ozone uptake of a Quercus serrata stand based on sap flow measurements with calibrated thermal dissipation sensors.
Science of the Total Environment, 888, 164005.

Ohta, A., Takahashi, K., Sase, H., Murao, N., Takada, K., Yamaguchi, M., Murakami, H., Nakaba, S., Watanabe, M.,
Mizukawa, K., Takada, H. and Izuta, T. (2023)
Relationship between the amount of black carbon particles deposited on the leaf surface and leaf surface traits
in nine urban greening tree species.
International Journal of Phytoremediation, 25, 1384-1396.

Takahashi, K., Ohta, A., Sase, H., Murao, N., Takada, K., Yamaguchi, M., Nakaba, S., Watanabe, M. and Izuta, T. (2023)
Seasonal variations in the amount of black carbon particles deposited on the leaf surfaces of
nine Japanese urban greening tree species and their related factors.
International Journal of Phytoremediation, 25, 252-262.

Watanabe, M., Li, J., Matsumoto, M., Aoki, T., Ariura, R., Fuse, T., Zhang, Y., Kinose, Y., Yamaguchi, M. and Izuta, T. (2022)
Growth and photosynthetic responses to ozone of Siebold’s beech seedlings grown under elevated CO2 and soil nitrogen supply.
Environmental Pollution, 304, 119233.

Norisada, M., Izuta, T. and Watanabe, M. (2021)
Distributions of photosynthetic traits, shoot growth, and anti-herbivory defence within a canopy of Quercus serrata
in different soil nutrient conditions.
Scientific Reports, 11: 14485.

Watanabe, M., Hiroshima, H., Kinose, Y., Okabe, S. and Izuta, T. (2020)
Nitrogen use efficiency for growth of Fagus crenata seedlings under elevated ozone and different soil nutrient conditions.
Forests, 11, 371 (doi: 10.3390/f11040371).

Kinose, Y., Fukamachi, Y., Okabe, S., Hiroshima, H., Watanabe, M. and Izuta, T. (2020)
Toward an impact assessment of ozone on plant carbon fixation using a process-based plant growth model:
A case study of Fagus crenata grown under different soil nutrient levels.  
Science of the Total Environment, 716, 137008 (doi: 10.1016/j.scitotenv.2020.137008).   

Kinose, Y., Yamaguchi, M., Matsumura, H. and Izuta T. (2020)
Impact assessment of ozone absorbed through stomata on photosynthetic carbon dioxide uptake
by Japanese deciduous forest trees: Implications for ozone mitigation policies.
Forests, 11, 137 (doi:10.3390/f11020137).

Zhu, B., Izuta, T. and Watanabe, M. (2020)
Nitrogen use efficiency of Quercus serrata seedlings under different soil nitrogen and phosphorus supplies.
Journal of of Agricultural Meteorology, 76, 11-18 (doi: 10.2480/agrmet.D-19-00032).

Kinose, Y., Fukamachi, Y., Watanabe, M. and Izuta, T. (2020)
Ozone-induced change in the relationship between stomatal conductance and net photosynthetic rate is
a factor determining cumulative stomatal ozone uptake by Fagus crenata seedlings.
Trees (Structure and Function), 34, 445-454.

Yamane, K., Nakaba, S., Yamaguchi, M., Kuroda, K., Sano, Y., Lenggoro, I. W., Izuta, T. and Funada, R. (2019)
Visualization and localization of submicron-sized ammonium sulfate particles on needles of Japanese larch (Larix kaempferi)
and Japanese cedar (Cryptomeria japonica) and leaves of Japanese beech (Fagus crenata) and Japanese chinquapin
(Castanopsis sieboldii) after artificial exposure. Forests, 10, 1151 (doi:10.3390/f10121151).

Miyama, T., Tobita, H., Uchiyama, K., Yazaki, K., Ueno, S., Uemura, A., Matsumoto, A., Kitao, M. and Izuta, T. (2019)
Seasonal changes in interclone variation following ozone exposure on three major gene pools:
An analysis of Cryptomeria japonica clones.
Atmosphere, 10, 643 (doi: 10.3390/atmos10110643).

Tatsumi, K., Abiko, T., Kinose, Y., Inagaki, S. and Izuta, T. (2019)
Effects of ozone on the growth and yield of rice (Oryza sativa L.) under different nitrogen fertilization regimes.
Environmental Science and Pollution Research (doi: 10.1007/s11356-019-06358-6)         

Kamal, M. Z. U., Yamaguchi, M., Kinose, Y. and Izuta, T. (2019)
Mitigation mechanism of O3-induced reduction in net photosynthesis of Bangladeshi wheat under soil salinity stress.
Photosynthetica, 57, 1025-1034. 　

Yamaguchi, M., Kinose, Y., Matsumura, H. and Izuta, T. (2019)
Evaluation of O3 effects on cumulative photosynthetic CO2 uptake in seedlings of
four representative Japanese broad-leaved forest tree species based on stomatal O3 uptake.
Forests, 10, 556 (doi:10.3390/f10070556).

Watanabe, M., Okabe, S., Kinose, Y., Hiroshima, H. and Izuta, T. (2019)
Effects of ozone on soil respiration rate of Siebold's beech seedlings grown under different soil nutrient conditions.
Journal of Agricultural Meteorology, 75, 39-46.

Watanabe, M., Kamimaki, Yu., Mori, M., Okabe, S., Arakawa, I., Kinose, Y., Nakaba, S. and Izuta, T. (2018)
Mesophyll conductance to CO2 in leaves of Siebold's beech (Fagus crenata) seedlings under elevated ozone.
Journal of Plant Research, 131, 907-914.

Motai, A., Yamazaki, M., Muramatsu, N., Watanabe, M. and Izuta, T. (2018)
Submicron ammonium sulfate particles deposited on leaf surfaces of a leafy vegetable
(Komatsuna, Brassica rapa L. var. perviridis) are taken up by leaf and enhance nocturnal leaf conductance.
Atmospheric Environment, 187, 155-162.

Miyama, T., Tobita, H., Uchiyama, K., Yazaki, K., Ueno, S., Saito, T., Matsumoto, A., Kitao, M. and Izuta, T. (2018)
Differences in monoterpene emission characteristics after ozone exposure between three clones representing
major gene pools of Cryptomeria japonica.
Journal of Agricultural Meteorology, 74, 102-108.

Watanabe, M., Kinose, Y. and Izuta, T. (2018)
Photosynthesis of three evergreen broad-leaved tree species, Castanopsis sieboldii, Quercus glauca,
and Q. myrsinaefolia, under elevated ozone.
iForest - Biogeosciences and Forestry, 11, 360-366.

Motai, A., Nakaba, S., Lenggoro, I. Wuled, Watanabe, M., Wada, Y. and Izuta, T. (2017)
Effects of submicron ammonium sulfate particles on the growth and yield of komatsuna
(Brassica rapa L. var. perviridis).
Atmospheric Environment, 169, 278-286.

Motai, A., Terada, Y., Kobayashi, A., Saito, D., Shimada, H., Yamaguchi, M. and Izuta, T. (2017)
Combined effects of irrigation amount and nitrogen load on growth and needle biochemical traits
of Cryptomeria japonica seedlings.　　　
Trees (Structure and Function), 31, 1317-1333.

Kinose, Y., Fukamachi, Y., Okabe, S., Hiroshima, H., Watanabe, M. and Izuta, T. (2017)
Photosynthetic responses to ozone of upper and lower canopy leaves of Fagus crenata Blume seedlings
grown under different soil nutrient conditions.
Environmental Pollution, 223, 213-222.

Kinose, Y., Fukamachi, Y., Okabe, S., Hiroshima, H., Watanabe, M. and Izuta, T. (2017)
Nutrient supply to soil offsets the ozone-induced growth reduction in Fagus crenata seedlings.
Trees (Structure and Function), 31, 259-272.　Yonekura, T. and Izuta, T. (2017)

Chapter 4 Effects of ozone on Japanese crops.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 57-71, Springer.

Watanabe, M., Hoshika, Y., Koike, T. and Izuta, T. (2017)
Chapter 5 Effects of ozone on Japanese trees.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 73-100, Springer.

Watanabe, M., Hoshika, Y., Koike, T. and Izuta, T. (2017)
Chapter 6 Combined effects of ozone and other environmental factors on Japanese trees.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 101-110, Springer.

Kitao, M., Yasuda, Y., Komatsu, M., Kitaoka, S., Yazaki, K., Tobita, H., Yoshimura, K.,
Miyama, T., Kominami, Y., Mizoguchi, Y., Yamanoi, K., Koike, T. and Izuta, T. (2017)
Chapter 8 Flux-based ozone risk assessment for Japanese temperate forests.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 125-133, Springer.

Matsumura, H. and Izuta, T. (2017)
Chapter 15 Effects of simulated acid rain on Asian trees.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 237-247, Springer.

Matsumura, H. and Izuta, T. (2017)
Chapter 16 Combined effects of simulated acid rain and other environmental factors on Asian trees
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 249-255, Springer.

Izuta, T. (2017)
Chapter 17 Effects of soil acidification on Asian Trees.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 257-270, Springer.

Nakaji, T. and Izuta, T. (2017)
Chapter 18 Effects of nitrogen load on Asian trees.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 271-280, Springer.

Yamaguchi, M. and Izuta, T. (2017)
Chapter 19 Effects of aerosol particles on plants.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 283-293, Springer.

Yamaguchi, M. and Izuta, T. (2017)
Chapter 20 Effects of black carbon and ammonium sulfate particles on plants.
Air Pollution Impacts on Plants in East Asia (Edited by Takeshi Izuta), pp. 295-308, Springer.

Kinose, Y., Fukamachi, Y., Okabe, S., Hiroshima, H., Watanabe, M. and Izuta, T. (2017)
Photosynthetic responses to ozone of upper and lower canopy leaves of Fagus crenata Blume seedlings
grown under different soil nutrient conditions.
Environmental Pollution, 223, 213-222.

Kinose, Y., Fukamachi, Y., Okabe, S., Hiroshima, H., Watanabe, M. and Izuta, T. (2017)
Nutrient supply to soil offsets the ozone-induced growth reduction in Fagus crenata seedlings.
Trees (Structure and Function), Trees (Structure and Function), 31, 259-272.

Kitao, M., Yasuda, Y., Kominami, Y., Yamanoi, K., Komatsu, M., Miyama, T., Mizoguchi, Y., Kitaoka, S.,
Yazaki, K., Tobita, H., Yoshimura, K., Koike, T. and Izuta, T. (2016)
Increased phytotoxic O3 dose accelerates autumn senescence in an O3-sensitive beech forest
even under the present-level O3.
Scientific Reports, 6, 32549.

Tetteh, R., Yamaguchi, M. and Izuta, T. (2016)
Effect of ambient levels of ozone on photosynthetic components and radical scavenging system in leaves of
African cowpea varieties.
African Crop Science Journal, 24(2), 127-142.

Nakaba, S., Yamane, K., Fukahori, M., Nugroho, W. D., Yamaguchi, M., Kuroda, K., Sano, Y., Lenggoro, I. W.,
Izuta, T. and Funada, R. (2016)
Effect of epicuticular wax crystals on the localization of artificially deposited sub-micron carbon-based aerosols
on needles of Cryptomeria japonica.
Journal of Plant Research, 129, 873-881.

Kamal, M. Z. U., Yamaguchi, M., Azuchi, F., Kinose, Y., Wada, Y., Funada, R. and Izuta, T. (2015)
Effects of ozone and soil salinity, singly and in combination, on growth, yield and leaf gas exchange rates of
two Bangladeshi wheat cultivars.
Asian Journal of Atmospheric Environment, 9, 173-186.

Yamaguchi, M., Hoshino, D., Kondo, T., Satoh, R., Inada, H. and Izuta, T. (2015)
Evaluation of O3 effect on net photosynthetic rate in flag leaves of rice (Oryza sativa L.) by stomatal O3 flux
and radical scavenging enzyme activities.
Journal of Agricultural Meteorology, 71, 211-217.

Tetteh, R., Yamaguchi, M., Wada, Y., Funada, R. and Izuta, T. (2015)
Effects of ozone on growth, net photosynthesis and yield of two African varieties of Vigna unguiculata.
Environmental Pollution, 96, 230-238.

Osone, Y., Kawarasaki, S., Ishida, A., Kikuchi, S., Shimizu, A., Yazaki, K., Aikawa, S., Yamaguchi, M.,
Izuta, T. and Matsumoto, I. G. (2014)
Responses of gas exchange rates and water relations to annual fluctuations of weather in three species
of urban street trees.
Tree Physiology, 34, 1056-1068.

Kinose, Y., Azuchi, F., Uehara, Y., Kanomata, T., Kobayashi, A., Yamaguchi, M. and Izuta, T. (2014)
Modeling of stomatal conductance to estimate stomatal ozone uptake by Fagus crenata, Quercus serrata,
Quercus mongolica var. crispula and Betula platyphylla. Environmental Pollution, 194, 235-245.

Yamaguchi, M., Otani, Y., Li, P., Nagao, H., Lenggoro, I. W., Ishida, A., Yazaki, K., Noguchi, K., Nakaba, S., Yamane, K.,
Kuroda, K., Sano, Y., Funada, R. and Izuta, T. (2014)
Effects of long-term exposure to ammonium sulfate particles on growth and gas exchange rates of
Fagus crenata, Castanopsis sieboldii, Larix kaempferi and Cryptomeria japonica seedlings.
Atmospheric Environment, 97, 493-500.

Azuchi, F., Kinose, Y., Matsumura, T., Kanomata, T., Uehara, Y., Kobayashi, A., Yamaguchi, M. and Izuta, T. (2014)
Modeling stomatal conductance and ozone uptake of Fagus crenata grown under different nitrogen loads.
Environmental Pollution, 184, 481-487.

Yamaguchi, M., Hoshino, D., Inada, H., Akhtar, N., Sumioka, C., Takeda, K. and Izuta, T. (2014)
Evaluation of the effects of ozone on yield of Japanese rice (Oryza sativa L.) based on stomatal ozone uptake.
Environmental Pollution, 184, 472-480.

Yamane, K., Nakaba, S., Yamaguchi, M., Kuroda, K., Sano, Y., Lenggoro, I. W., Izuta, T. and Funada, R. (2012)
Visualization of artificially deposited submicron-sized aerosol particles on the surfaces of leaves and needles in trees.
Asian Journal of Atmospheric Environment, 6, 275-280.

Yamaguchi, M., Takeda, K., Otani, Y., Murao, N., Sase, H., Lenggoro, I. W., Yazaki, K.,
Noguchi, K., Ishida, A. and Izuta, T. (2012)
Optical method for measuring deposition amount of black carbon particles on foliar surface.
Asian Journal of Atmospheric Environment, 6, 268-274.

Yamaguchi, M., Otani, Y., Takeda, K., Lenggoro, W., Ishida, A., Yazaki, K., Noguchi, K.,
Sase, H., Murao, N., Nakaba, S., Yamane, K., Kuroda, K., Sano, Y., Funada, R. and Izuta, T. (2012)
Effects of long-term exposure to black carbon particles on growth and gas exchange rates of
Fagus crenata, Castanopsis sieboldii, Larix kaempferi and Cryptomeria japonica seedlings.
Asian Journal of Atmospheric Environment, 6, 259-267.

Yamaguchi, M., Watanabe, M., Tabe, C., Naba, J., Matsumura, H., Kohno, Y. and Izuta, T. (2012)
Effects of sulfur dioxide on growth and net photosynthesis of six Japanese forest tree species
grown under different nitrogen loads.
Trees (Structure and Function), 26, 1859-1874.

Inada, H., Kondo, T., Akhtar, N., Hoshino, D., Yamaguchi, M. and Izuta, T. (2012)
Relationship between cultivar difference in the sensitivity of net photosynthesis to ozone and
reactive oxygen species scavenging system in Japanese winter wheat (Triticum aestivum).
Physiologia Plantarum, 146, 217-227.

Watanabe, M., Yamaguchi, M., Matsumura, H., Kohno, Y. and Izuta, T. (2012)
Risk assessment of ozone impact on Fagus crenata in Japan: Consideration of atmospheric nitrogen deposition.
European Journal of Forest Research, 131, 475-484.

Watanabe, M., Yamaguchi, M., Matsumura, H., Kohno, Y., Koike, T. and Izuta, T. (2011) 　　
A case study of risk assessment of ozone impact on forest tree species in Japan. 　　　
Asian Journal of Atmospheric Environment, 5(4), 205-215.

Yamaguchi, M., Watanabe, M., Matsumura, H., Kohno, Y. and Izuta, T. (2011)
Experimental studies on the effects of ozone on growth and photosynthetic activity of Japanese forest tree species. 　　
Asian Journal of Atmospheric Environment, 5(2), 65-78.|

Akhtar, N., Yamaguchi, M., Inada, H., Hoshino, D., Kondo, T. and Izuta, T. (2010)
Effects of ozone on growth, yield and leaf gas exchange rates of four Bangladeshi cultivars of rice (Oryza sativa L.).
Environmental Pollution, 158, 2970-2976.

Watanabe, M., Umemoto-Yamaguchi, M., Koike, T. and Izuta, T. (2010)
Growth and photosynthetic response of Fagus crenata seedlings to ozone and/or elevated carbon dioxide.
Landscape and Ecological Engineering, 6, 181-190.

Watanabe, M., Matsuo, N., Yamaguchi, M., Matsumura, H., Kohno, Y. and Izuta, T. (2010)
Risk assessment of ozone impact on the carbon absorption of Japanese representative conifers.
European Journal of Forest Research 129, 421-430.

Akhtar, N., Yamaguchi, M., Inada, H., Hoshino, D., Kondo, T. and Izuta, T. (2010)
Effects of ozone on growth, yield and leaf gas exchange rates of two Bangladeshi cultivars of
wheat (Triticum aestivum L.).
Environmental Pollution, 158, 1763-1767.

Yamaguchi, M., Watanabe, M., Matsumura, H., Kohno, Y. and Izuta, T. (2010)
Effects of ozone on nitrogen metabolism in the leaves of Fagus crenata seedlings under different soil nitrogen loads.
Trees (Structure and Function), 24, 175-184.

Inada, H., Yamaguchi, M., Satoh, R., Hoshino, D., Nagasawa, A., Negishi, Y., Nouchi, I., Kobayashi, K. and Izuta, T. (2008)
Effects of ozone on photosynthetic components and radical scavenging system in leaves of rice (Oryza sativa L.).
Journal of Agricultural Meteorology, 64(4), 243-255.

Yamaguchi, M., Inada, H., Satoh, R., Hoshino, D., Nagasawa, A., Negishi, Y., Sasaki, H.,
Nouchi, I., Kobayashi, K. and Izuta, T. (2008)　
Effects of ozone on growth, yield and leaf gas exchange rates of two Japanese cultivars of rice (Oryza sativa L.).
Journal of Agricultural Meteorology, 64(3), 131-141.

Watanabe, M., Yamaguchi, M., Matsumura, H., Kohno, Y. and Izuta, T. (2008)
Effects of ozone on growth and photosynthesis of Castanopsis sieboldii seedlings grown under different nitrogen loads.
Journal of Agricultural Meteorology, 64(3), 143-155.

Yamaguchi, M., Watanabe, M., Iwasaki, M., Tabe, C., Matsumura, H., Kohno, Y. and Izuta, T. (2007)
Growth and photosynthetic responses of Fagus crenata seedlings to O3 under different nitrogen loads.
Trees (Structure and Function), 21(6), 707-718.

Watanabe, M., Yamaguchi, M., Tabe, C., Iwasaki, M., Yamashita, R., Funada, R., Fukami, M.,
Matsumura, H., Kohno, Y. and Izuta, T. (2007)
Influences of nitrogen load on the growth and photosynthetic responses of Quercus serrata seedlings to O3.
Trees (Structure and Function), 21(4), 421-432.

Yamada, T., Inoue, T., Fukuhara, H., Nakahara, O., Izuta, T., Suda, R., Takahashi, M., Sase, H.,
Takahashi, A., Kobayashi, H., Ohizumi, T. and Hakamata, T. (2007)
Long-term trends in surface water quality of five lakes in Japan.
Water, Air and Soil Pollution, Focus, 7, 259-266.

Yamaguchi, M., Watanabe, M., Matsuo, N., Naba, J., Funada, R., Fukami, M. Matsumura,
H., Kohno, Y. and Izuta, T. (2007)
Effects of nitrogen supply on the sensitivity to O3 of growth and photosynthesis of
Japanese beech (Fagus crenata) seedlings.
Water, Air and Soil Pollution, Focus, 7, 131-136.

Watanabe, M., Yamaguchi, M., Iwasaki, M., Matsuo, N., Naba, J., Matsumura, H., Kohno, Y. and Izuta, T. (2006)
Effects of ozone and/or nitrogen load on the growth of Larix kaempferi, Pinus densiflora
and Cryptomeria japonica seedlings.
Journal of Japan Society for Atmospheric Environment, 41(6), 320-334.

Karonen, M., Ossipov, V., Ossipova, S., Kapari, L., Loponen, J., Matsumura, H., Kohno, Y.,
Mikami, C., Sakai, Y., Izuta, T. and Pihlaja, K. (2006)
Effects of elevated carbon dioxide and ozone on foliar proanthocyanidins in
Betula platyphylla, Betula ermanii and Fagus crenata seedlings.
Journal of Chemical Ecology, 32(7), 1445-1458.

Choi, D. S., Kayama, M., Jin, H. O., Lee, C. H., Izuta, T. and Koike, T. (2006)
Growth and photosynthetic responses of two pine species (Pinus koraiensis and Pinus rigida)
in a polluted industrial region in Korea.
Environmental Pollution, 139, 421-432.

Kohno, Y., Matsumura, H., Ishii, T. and Izuta, T. (2005)
Establishing critical levels of air pollutants for protecting East Asian vegetation, A challenge.
Plant Responses to Air Pollution and Global Change (Eds. by K. Omasa, I. Nouchi and L. J. De Kok),
Springer-Verlag Tokyo., 243-250.

Nakaji, T., Yonekura, T., Kuroha, M., Takenaga, S. and Izuta, T. (2005)
Growth, annual ring structure and nutrient status of Japanese red pine and Japanese cedar seedlings
after three years of excessive N load.
Phyton (Annales Rei Botanicae), 45(4), 457-464.

Yonekura, T., Kihira, A., Shimada, T., Miwa, M., Arzate, A., Izuta, T. and Ogawa, K. (2005)
Impacts of O3 and CO2 enrichment on growth of komatsuna (Brassica campestris)
and radish (Raphanus sativus).
Phyton (Annales Rei Botanicae), 45(4), 229-235.

Izuta, T., Tominaga, K., Watanabe, M., Matsumura, H. and Kohno, Y. (2005)
Effects of nitrogen load on growth and leaf nutrient status of Japanese evergreen broad-leaved tree species.
Journal of Agricultural Meteorology, 60(6), 1125-1128.

Matsumura, H., Mikami, C., Sakai, Y., Murayama, K., Izuta, T., Yonekura, T., Miwa, M. and Kohno, Y. (2005)
Impacts of elevated O3 and/or CO2 on growth of Betula platyphylla, Betula ermanii, Fagus crenata,
Pinus densiflora and Cryptomeria japonica seedlings.
Journal of Agricultural Meteorology, 60(6), 1121-1124.

Watanabe, M., Yonekura, T., Honda, Y., Yoshidome, M., Nakaji, T. and Izuta, T. (2005)
Effects of ozone and soil water stress, singly and in combination, on leaf antioxidative systems of Fagus crenata seedlings.
Journal of Agricultural Meteorology, 60(6), 1105-1108.

Izuta, T., Yamaoka, T., Nakaji, T., Yonekura, T., Yokoyama, M., Funada, R., Koike, T and Totsuka, T. (2004)
Growth, net photosynthesis and leaf nutrient status of Fagus crenata seedlings grown in brown forest soil
acidified with H2SO4 or HNO3 solution.
Trees (Structure and Function), 18, 677-685.

Yonekura, T., Yoshidome, M., Watanabe, M., Honda, Y., Ogiwara, I. and Izuta, T. (2004)
Carry-over effects of ozone and water stress on leaf phenological characteristics and bud frost hardiness
of Fagus crenata seedlings.
Trees (Structure and Function), 18, 581-588.

Nakaji, T., Kobayashi, T., Kuroha, M., Omori, K., Matsumoto, Y., Yonekura, T., Watanabe, K.,
Utriainen, J. and Izuta, T. (2004)
Growth and nitrogen availability of red pine seedlings under high nitrogen load and elevated ozone.
Water, Air and Soil Pollution, Focus, 4, 277-287.

Nakaji, T., Takenaga, S., Kuroha, M. and Izuta, T. (2002)
Photosynthetic response of Pinus densiflora seedlings to high nitrogen load.
Environmental Sciences, 9(4), 269-282.

Tang, H., Wang, R., Izuta, T., Aoki, M. and Totsuka, T. (2002)
Effects of red-yellow soil acidification on seed germination of Chinese pine.
Journal of Environmental Sciences, 14(1), 115-119.

Nakaji, T., Fukami, M., Dokiya, Y. and Izuta, T. (2001)
Effects of high nitrogen load on growth, photosynthesis and nutrient status of Cryptomeria japonica and
Pinus densiflora seedlings.
Trees (Structure and Function), 15, 453-461.

Yonekura, T., Honda, Y., Oksanen, E., Yoshidome, M., Watanabe, M., Funada, R., Koike, T. and Izuta, T. (2001)
The influences of ozone and soil water stress, singly and in combination, on leaf gas exchange rates,
leaf ultrastructural characteristics and annual ring width of Fagus crenata seedlings.
J. Jpn. Soc. Atmos. Environ., 36(6), 333-351.

Izuta, T., Yamaoka, T., Nakaji, T., Yonekura, T., Yokoyama, M., Matsumura, H., Ishida, S., Yazaki, K.,
Funada, R. and Koike, T. (2001)
Growth, net photosynthetic rate, nutrient status and secondary xylem anatomical characteristics
of Fagus crenata seedlings grown in brown forest soil acidified with H2SO4 solution.
Water, Air and Soil Pollution, 130, 1007-1012.

Nakaji, T. and Izuta, T. (2001)
Effects of ozone and/or excess soil nitrogen on growth, needle gas exchange rates and Rubisco contents
of Pinus densiflora seedlings.
Water, Air and Soil Pollution, 130, 971-976.

Yonekura, T., Dokiya, Y., Fukami, M. and Izuta, T. (2001)
Effects of ozone and/or soil water stress on growth and photosynthesis of Fagus crenata seedlings.
Water, Air and Soil Pollution, 130, 965-970.

Emberson, L. D., Ashmore, M. R., Murray, F., Kuylenstierna, J. C. I., Percy, K.E.,
Izuta, T., Zheng, Y., Shimizu, H., Sheu, B. H., Lui, C. P., Agrawal, M., Wahid, A.,
Abdel-Latif, N. M., van Tienhoven, M., de Bauer, L. I. and Domingos, M. (2001)
Impacts of air pollutants on vegetation in developing countries.
Water, Air and Soil Pollution, 130, 107-118.

Reprint Request and Further Information
Prof. Dr. Takeshi Izuta
Institute of Agriculture,
Tokyo University of Agriculture and Technology,
Fuchu, Tokyo 183-8509, Japan.
E-mail: izuta-at-cc.tuat.ac.jp
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