Physiological and anatomical dissection for snorkeling in rice

Publikation: KonferencebidragKonferenceabstrakt til konferenceForskningfagfællebedømt

  • Yoshinao Mori
  • Yong-Gin Yin
  • Nobuo Suzui
  • Timothy D. Colmer
  • Motoyuki Ashikari
  • Naoki Kawachi
  • Pedersen, Ole
  • Keisuke Nagai
Flooding is an abiotic stress which has adverse impacts on plants because it impairs breath. The diffusion rates of dissolved gases are about 104-fold slower than gases in the air, so that submerged organ can become low in O2 restricting respiration. In addition, restricted access to CO2 can also limit photosynthesis of submerged leaves. As climate change is predicted to result in more increased rain and floods in the world, it is essential to understand the adaptation mechanism of the plant to the flooded environment for further sustainable crop production. Rice, which is the major staple crop grown in waterlogged soil, adapted to flooding environment. Therefore, to understand the flood tolerance of crop, we dissected the physiological and anatomical features of rice as a role model on continuously growing in the paddy field. Physiological analysis of O2 dynamics using O2 optode in rice imposed to various flood regimes revealed that the emergence of leaves from underwater prevented the nighttime severe
hypoxia during submergence. In addition, nighttime gene expressions dynamics related to anaerobic metabolism were highly induced in the completely submerged plant than the partially submerged plant, which maintained the contact with the air. Moreover, anatomical analysis of rice morphology by the
confocal laser microscope showed that rice forms connected hollow tissues/organs over whole plant body including leaf blade, leaf sheath, stem, and root, for translocation of gas taken from leaves above underwater to the submerged organ. These series of results indicated the gas translocation via the
snorkeling function of hollow tissues/organs connected over whole plant body maintains the physiological activity of submerged rice, therefore rice is able to continuously grow in a flooded environment.
OriginalsprogEngelsk
Publikationsdato2019
Antal sider1
StatusUdgivet - 2019
Begivenhed2019 ISPA Conference - Academia Sinica, Taipei, Taiwan
Varighed: 2 jun. 20195 jun. 2019
http://2019ispa.org

Konference

Konference2019 ISPA Conference
LokationAcademia Sinica
LandTaiwan
ByTaipei
Periode02/06/201905/06/2019
Internetadresse

ID: 221647562