Since adopting reform and opening policy. the electric power industry in China developed rapidly. At present there are more than 200 units of 200 MW and above large generation units. Due to hasty development, problems...Since adopting reform and opening policy. the electric power industry in China developed rapidly. At present there are more than 200 units of 200 MW and above large generation units. Due to hasty development, problems are numerous, especially for the boilers. In the 1986-1990 period (Seventh Five-year Plan period), large capacity boiler outages accounted for 65.8% of all large units equipment outages, and "four tube"展开更多
In angiosperms,the pollen tube enters the receptive synergid cell,where it ruptures to release its cytoplasm along with two sperm cells.This interaction is complex,and the exact signal transducers that trigger the bur...In angiosperms,the pollen tube enters the receptive synergid cell,where it ruptures to release its cytoplasm along with two sperm cells.This interaction is complex,and the exact signal transducers that trigger the bursting of pollen tubes are not well understood.In this study,we identify three homologous receptor-like cytoplasmic kinases(RLCKs)expressed in pollen tubes of Arabidopsis,Delayed Burst 1/2/3(DEB1/2/3),which play a crucial role in this process.These genes produce proteins localized on the plasma membrane,and their knockout causes delayed pollen tube burst and entrance of additional pollen tubes into the embryo sac due to fertilization recovery.We show that DEBs interact with the Ca^(2+)pump ACA9,influencing the dynamics of cytoplasmic Ca^(2+)in pollen tubes through phosphorylation.These results highlight the importance of DEBs as key signal transducers and the critical function of the DEB-ACA9 axis in timely pollen tube burst in synergids.展开更多
文摘Since adopting reform and opening policy. the electric power industry in China developed rapidly. At present there are more than 200 units of 200 MW and above large generation units. Due to hasty development, problems are numerous, especially for the boilers. In the 1986-1990 period (Seventh Five-year Plan period), large capacity boiler outages accounted for 65.8% of all large units equipment outages, and "four tube"
基金supported by NSFC grants(31991203,32130032)the National Key Research and Development Program of China(2022YFF 1003500)+1 种基金the CAS Project for Young Scientists in Basic Research(no.YSBR-078)the Strategic Priority Research Program of the Chinese Academy of Science(XDA24020306)。
文摘In angiosperms,the pollen tube enters the receptive synergid cell,where it ruptures to release its cytoplasm along with two sperm cells.This interaction is complex,and the exact signal transducers that trigger the bursting of pollen tubes are not well understood.In this study,we identify three homologous receptor-like cytoplasmic kinases(RLCKs)expressed in pollen tubes of Arabidopsis,Delayed Burst 1/2/3(DEB1/2/3),which play a crucial role in this process.These genes produce proteins localized on the plasma membrane,and their knockout causes delayed pollen tube burst and entrance of additional pollen tubes into the embryo sac due to fertilization recovery.We show that DEBs interact with the Ca^(2+)pump ACA9,influencing the dynamics of cytoplasmic Ca^(2+)in pollen tubes through phosphorylation.These results highlight the importance of DEBs as key signal transducers and the critical function of the DEB-ACA9 axis in timely pollen tube burst in synergids.
