第1020回生物科学セミナー
Long-term Responses of Plants to Climate Change: From Glacial through Future Environments
Dr. Joy Kirsten Ward（University of Kansas）
2014年12月08日(月) 16:40-18:00 理学部2号館 講堂
My main research theme and the focus of my seminar are aimed at addressing the effects of changing atmospheric [CO2] and climate on the physiology, development, and growth of plants. An understanding of plant responses to global change at the most fundamental levels is critical for accurately predicting how terrestrial ecosystems will respond to a rapidly changing planet, and this understanding can be enhanced by determining plant responses to both past and future environments. I focus on a large continuum spanning conditions of the last glacial period through those predicted for the future, which encompass long-term evolutionary change. I use a variety of approaches in my work including stable isotope measurements, genomic approaches, and quantitative genetics. In addition, although we know a great deal about plant responses to [CO2] and climate change within a single generation, we know far less about how changing conditions will alter plant growth and developmental timing over multiple generations. Therefore, there is potential for unexpected responses of plants in the future that cannot be predicted from current studies. My research has focused on reducing this critical gap in our knowledge base. I have used modern plants in artificial selection experiments to address this issue, as well as ancient specimens from the La Brea tar pits in Los Angeles, pack-rat middens from the southwestern U.S., and bogs in New Zealand.
参考文献
Medeiros JS, JK Ward (2013) Increasing atmospheric [CO2 ] from glacial to future concentrations affects drought tolerance via impacts on leaves, xylem and their integrated function. New Phytologist : 199: 738-748
Ward JK , D Samanta Roy, I Chatterjee, CR Bone, CJ Springer, JK Kelly (2012) Identification of a major QTL that alters flowering time at elevated [CO2 ] in Arabidopsis thaliana. Plos ONE : 7: e49028
Gerhart LM, JM Harris, JB Nippert, DR Sandquist, JK Ward (2012) Glacial trees from the La Brea tar pits show physiological constraints of low CO2 . New Phytologist : 194: 63-69
Gerhart, LM, JK Ward (2010) Plant Responses to low [CO2 ] of the past. Tansley Review. New Phytologist 188: 674-695
場所： 理学部 2号館 講堂
担当： 東京大学大学院理学系研究科・生物科学専攻・植物生態学研究室
寺島一郎 (itera@bs.s.u-tokyo.ac.jp, 03-5841-4465)
