Matsuo Uemura - Role of light signals in freezing tolerance mechanism in plants: interactions with temperature signals

  • Date: Feb 22, 2017
  • Time: 14:00 - 15:30
  • Speaker: Matsuo Uemura
  • DEPARTMENT OF PLANT-BIOSCIENCE AND CRYOBIOFRONTIER RESEARCH CENTER FACULTY OF AGRICULTURE, IWATE University, Japan
  • Location: Central Building
  • Room: Seminar Room
  • Host: Dirk Hincha
Temperate herbaceous plants sense environmental changes during fall and increase their freezing tolerance, which is critical for survival over winter. This process, called as cold acclimation (CA), has been known to be mainly regulated by changes in temperature in season. However, changes in air temperature has been unpredictable and often show sudden risings and/or drops, which is worsened with global climate changes. Light conditions, in addition to lowering temperature, are known as another important factor to regulate CA and, in fact, shortening the day length as well as changes in red/far red light conditions affects the extent of CA. However, effects of light quality and the combination of temperature and light remain to be studied in detail. With Arabidopsis, we here report that light conditions (blue light as well as red light) and temperature conditions in day and night periods (constant vs fluctuated) influence freezing tolerance in complex way. We will discuss elaborate systems for plants to prepare for winter beforehand even under unpredictable climate conditions in the global climate change era.

Hiroyuki Imai1, Maki Kanaya2, Mei Ogata2, Yukio Kawamura1,2,3 and Matsuo Uemura1,2,3

1United Graduate School of Agricultural Sciences

2Cryobiofrontier Research Center and Department of Plant-Biosciences, Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan

 
loading content