Plants absorb sunlight to power the photochem- ical reactions of photosynthesis, which can potentially damage the photosynthetic machinery. However, the mech- anism that protects chloroplasts from the damage remains u...Plants absorb sunlight to power the photochem- ical reactions of photosynthesis, which can potentially damage the photosynthetic machinery. However, the mech- anism that protects chloroplasts from the damage remains unclear. In this work, we demonstrated that rice （Oryza sativa L.） SLAC7 is a generally expressed membrane protein. Loss- of-function of SLAC7 caused continuous damage to the chloroplasts of mutant leaves under normal light conditions. Ion leakage indicators related to leaf damage such as H^O2 and abscisic acid levels were significantly higher in slac7-1 than in the wild type. Consistently, the photosynthesis efficiency and Fv/Fm ratio of slac7-1 were significantly decreased （similar to photoinhibition）. In response to chloroplast damage, slat7- 1 altered its leaf morphology （curled or fused leaf） by the synergy between plant hormones and transcriptional factors to decrease the absorption of light, suggesting that a photoprotection mechanism for chloroplast damage was activated in slac7-1. When grown in dark conditions, slac7-1 displayed a normal phenotype. 5LAC7 under the control of the AtSLAC1 promoter could partially complement thephenotypes of Arabidopsis slacl mutants, indicating a partial conservation of SLAC protein functions. These results suggest that SLAC7 is essential for maintaining the chloroplast stability in rice.展开更多
Cations and anions are involved in plant growth,development and signaling responses as essential nutrients,signaling molecules and osmotic components,and the dynamic movement of the diverse ions through biological mem...Cations and anions are involved in plant growth,development and signaling responses as essential nutrients,signaling molecules and osmotic components,and the dynamic movement of the diverse ions through biological membrane is mainly mediated and regulated by ion channels and transporters.Potassium(K^+)展开更多
Deparlment of Energy’s SLAC National Accelerator Laboratory，Menlo Park，Calif，Stanford University，Calif，以及Technical of Denmark（DTU），Lyngby的科研人贤研发出一种可代替昂贵铂催化剂的廉价、来源充足的替代品，结合...Deparlment of Energy’s SLAC National Accelerator Laboratory，Menlo Park，Calif，Stanford University，Calif，以及Technical of Denmark（DTU），Lyngby的科研人贤研发出一种可代替昂贵铂催化剂的廉价、来源充足的替代品，结合一种町吸光电极利用太阳光和水制造氧燃料。展开更多
基金funded by the National High Technology Research and Development Program of China (863 Program)the National Program of Transgenic Variety Development of Chinathe National Natural Science Foundation of China
文摘Plants absorb sunlight to power the photochem- ical reactions of photosynthesis, which can potentially damage the photosynthetic machinery. However, the mech- anism that protects chloroplasts from the damage remains unclear. In this work, we demonstrated that rice （Oryza sativa L.） SLAC7 is a generally expressed membrane protein. Loss- of-function of SLAC7 caused continuous damage to the chloroplasts of mutant leaves under normal light conditions. Ion leakage indicators related to leaf damage such as H^O2 and abscisic acid levels were significantly higher in slac7-1 than in the wild type. Consistently, the photosynthesis efficiency and Fv/Fm ratio of slac7-1 were significantly decreased （similar to photoinhibition）. In response to chloroplast damage, slat7- 1 altered its leaf morphology （curled or fused leaf） by the synergy between plant hormones and transcriptional factors to decrease the absorption of light, suggesting that a photoprotection mechanism for chloroplast damage was activated in slac7-1. When grown in dark conditions, slac7-1 displayed a normal phenotype. 5LAC7 under the control of the AtSLAC1 promoter could partially complement thephenotypes of Arabidopsis slacl mutants, indicating a partial conservation of SLAC protein functions. These results suggest that SLAC7 is essential for maintaining the chloroplast stability in rice.
基金supported by the National Natural Science Foundation of China(31570262 and 3130022)a basic research key project from Science and Technology Commission of Shanghai Municipality(13JC1406100)
文摘Cations and anions are involved in plant growth,development and signaling responses as essential nutrients,signaling molecules and osmotic components,and the dynamic movement of the diverse ions through biological membrane is mainly mediated and regulated by ion channels and transporters.Potassium(K^+)
文摘Deparlment of Energy’s SLAC National Accelerator Laboratory，Menlo Park，Calif，Stanford University，Calif，以及Technical of Denmark（DTU），Lyngby的科研人贤研发出一种可代替昂贵铂催化剂的廉价、来源充足的替代品，结合一种町吸光电极利用太阳光和水制造氧燃料。
