Coordinated responses to oxygen and sugar deficiency allow rice seedlings to tolerate flooding.
Flooding is a widespread natural disaster that leads to oxygen (O(2)) and energy deficiency in terrestrial plants, thereby reducing their productivity. Rice is unusually tolerant to flooding, but the underlying mechanism for this tolerance has remained elusive. Here, we show that protein kinase CIPK15 [calcineurin B-like (CBL)-interacting protein kinase] plays a key role in O(2)-deficiency tolerance in rice. CIPK15 regulates the plant global energy and stress sensor SnRK1A (Snf1-related protein kinase 1) and links O(2)-deficiency signals to the SnRK1-dependent sugar-sensing cascade to regulate sugar and energy production and to enable rice growth under floodwater. Our studies contribute to understanding how rice grows under the conditions of O(2) deficiency necessary for growing rice in irrigated lowlands.
Lee
Kuo-Wei
KW
Graduate Institute of Life Sciences, National Defense Medical Center, Neihu, Taipei 114, Taiwan, ROC.
Chen
Peng-Wen
PW
Lu
Chung-An
CA
Chen
Shu
S
Ho
Tuan-Hua David
TH
Yu
Su-May
SM
D000222:Adaptation, Physiological / Q000187:drug effects / Q000235:genetics / Q000502:physiology; D000595:Amino Acid Sequence; D015153:Blotting, Western; D050260:Carbohydrate Metabolism; D055868:Floods; D008954:Models, Biological; D008969:Molecular Sequence Data; D009154:Mutation; D012275:Oryza / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism*; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D011494:Protein Kinases / Q000145:classification / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D036226:Seedlings / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction / Q000187:drug effects / Q000235:genetics / Q000502:physiology; D013395:Sucrose / Q000494:pharmacology
D010940:Plant Proteins; D013395:Sucrose; D011494:Protein Kinases; D010100:Oxygen