Session Proposal
CSSJ-JSB-JSTA Special Joint Session in the 7th Asian Crop Science Conference* Crop Science Society of Japan, Japanese Society of Breeding, Japanese Society for
Tropical Agriculture

1. PROPOSED TITLE OF THE SESSION
Improvement of Crop Performance for Sustainable Agricultural Development inWetlands

2. THE SPECIFIC RESEARCH THEME
The wetland can be defined as the land that has a predominance of hydric soils and isinundated or saturated by surface or groundwater at a frequency and duration
sufficient to support

a prevalence of hydrophytic vegetation typically adapted for lifein saturated soil conditions. The

expansion of agricultural areas to feed a growing

population has led to a major conversion of wetland into farmland in many countries,
resulting in disappearance of 50% of the world’s wetlands for agriculture andurbanization in the twentieth century. However, there is still a need to increase
agricultural production and crop production as well in developing regions of Asia andAfrica where the vast area of wetlands is often kept unused for agriculture mainly
because of traditional perception of the wetlands as wastelands, badlands, or sourcesof disease. In the past, the conversion of wetlands to agriculture has been rarely donein a harmonious way with its natural environment and it is now becoming a big issue
on how to restore those degraded wetlands. Extensive changes in water environment
in wetlands have often led the degradation of physical and chemical properties of soils,
microclimatic conditions of ecosystem that is subtly kept in balance and composition ofbiota. For future development of wetlands to crop production, it is very important totake into account the sustainability issue from the beginning. One way is, instead ofmaking a considerable change in the wetland environments, to incorporate adaptation
ability to the wetland into the crop that will be introduced in a particular wetland.
Through this approach, agriculture and wetlands can maintain a very harmonious
relationship. The waterlogging and submergence on the events for excess water are
two major themes in this session. On the other hand, improvements of crop
performance under flooding are quite important for sustainable agricultural system
under unstable environment at present and in future. This session should be verytimely and can expect to bring valuable inputs from and interaction of scientists
involved in this area of research.

3. NAME AND ADDRESS OF SESSION ORGANIZER(S)Dr, Jun-Ichi SAKAGAMI
JAPAN INTERNATIONAL RESEARCH CENTER FOR AGRICULTURAL SCIENCES
1-1 Ohwashi, Tsukuba, 305-8686
sakajun@affrc.go.jp
Dr. Akira YAMAUCHINAGOYA UNIVERSITY
Furo-cho, Chigusa-ku, Nagoya, 464-8601
ayama@agr.nagoya-u.ac.jp

4. POLICY RELEVANCE OF SESSION PROPOSAL
It has been a critical issue in the global political arena to improve the food security inthe developing regions of Asia and is still on top of the list for global agenda. The
recent promising achievement toward it is development of crop varieties withtolerance to abiotic stresses such as drought, extreme temperature, salt accumulation,
excess water and so on. This has been achieved partly by rapid advancement ofmolecular biology. If some of crop varieties that have been recently developed or will
be developed in near future with tolerance to excess water will be incorporated into thelowland environment such as wetlands that spread widely throughout the developing
regions, it will make a significant contribution to the food security in the region. For
integrated and sustainable utilization of the wetlands, it is very important to consider
various crop species rather than focusing on some particular crop group such as ricethat has wide adaptability to the wetland conditions. For that, the adaptability of thosecrops should be further improved for better performance in the wetlands using
combined approach of conventional and molecular breeding.

5. PRELIMINARY PROPOSED SESSION PROGRAMMEThe program is now under planning. The draft program is as follow:
1. Current status of the wetlands utilization for crop production
2. Adaptation and tolerance of cereal crops in the wetlands
3. Adaptation and tolerance of leguminous crops in the wetlands
4. Improvement of rice performance in the wetland through molecular approach
5. Improvement of rice production through sustainable development of wetland

6. General discussion
6. PRESENTATION OF PROPOSED SESSION
1. Studies on molecular mechanism of formations of aerenchyma and a barrier to radial
oxygen loss in crops under waterlogged conditions.
Mikio Nakazono1)*, Takaki Yamauchi1), Imene Rajhi2), Hirokazu Takahashi1), Tomomi Abiko2,3),
Shunsaku Nishiuchi1), So Yamazaki2), Katsuhiro Shiono 2,4), 1)Graduate School of BioagriculturalSciences, Nagoya Univ., Nagoya, Japan, 2)Graduate School of Agricultural and Life Sciences, Univ.
of Tokyo, Tokyo, Japan , 3)Biological resources and post-harvest division, Japan International
Research Center for Agricultural Sciences (JIRCAS), Ibaraki, Japan, 4)Department of Bioscience,
Fukui Prefectural Univ., Fukui, Japan
2. Wet Injury of wheat in upland field converted from paddy field in Japan.
Kentaro Kawaguchi, National Agricultural Research Organisation, Ibaraki, Japan

3. Roles of root system development and function in the growth and yield underwaterlogged condition in wheat
Tomohito Hayashi1), Tomofumi Yoshida2), Kiyoshi Fujii3), Takako Tuji2), Yurie Okada 1), ErikoHayashi1) and Akira Yamauchi1)＊, 1)Graduate School of Bioagricultural Sciences, Nagoya
University, Aichi, Japan, 2)Aichi Prefecture Agricultural Research Center, Aichi, Japan, 3)Aichi
Prefecture College of Agriculture Graduates, Aichi, Japan
4.Secondary aerenchyma formation and root growth response of soybean (Glycinemax) seedlings under flooded conditions.
Toshihiro Mochizuki1)*, Satomi Sakazono2), Satoshi Shimamura3),

1)Facultyof Agriculture,Kyushu Univ., Fukuoka Japan, 2)Graduate School of Life Sciences, Tohoku Univ., Miyagi, Japan,3)National Agricultural Research Center for Tohoku Region, Akita, Japan

5. Current research status on crop tolerance against swampy condition and cropcultivation in swampy areas of Indonesia.
Rujito A. Suwignyo1) *, Hiroshi Ehara2), and Ahmad Junaedi3), 1) Department of Agronomy, Facultyof Agriculture Sriwijaya Univ., Palembang, Indonesia. 2)Graduate School of Bioresources, Mie Univ.,
Mie, Japan.3)Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor
Agricultural Univ., Bogor, Indonesia.
6. Growth and physiological response of sago palm against aluminum stress under acidcondition.
Ornprapa Anugoolprasert1) , Hiroshi Ehara1) , Shina kinoshita1) , Hitoshi Naito2) , Somchai
Chakhatrakan3) , 1)Graduate School of Bioresources, Mie Univ., Mie, Japan, 2)College of Life Science,
Kurashiki Univ. of Science and The Arts, Okayama, Japan, 3)Department of Agricultural andTechnology, Thammasat Univ., Pathumthani, Thailand