Cassava(Manihot esculenta Crantz)is a root crop significant in food security and various bio-industrial applications such as animal feed,modified starch,and biofuels.Drought and cold stress are two major factors limit...Cassava(Manihot esculenta Crantz)is a root crop significant in food security and various bio-industrial applications such as animal feed,modified starch,and biofuels.Drought and cold stress are two major factors limiting cassava production qualitatively and quantitatively,for which plants have evolved mechanisms to overcome the impact of these two stressors.In recent years,significant progress has been achieved in understanding the response mechanism of cassava plants to stress signals to tolerate the above stresses.In this review,core stress-signaling pathways,including transcription factor(TF)-related regulatory networks,plant hormone signaling,reactive oxygen species(ROS)scavenging,and non-coding RNA(ncRNA)and alternative splicing(AS)that modify gene expression levels in response to drought and/or cold stress in cassava,are summarized.Understanding these stress signaling and responses will increase our ability to improve the crops tolerance to multiple stresses for agricultural sustainability and food security for the growing world population.展开更多
End-pumped by a 976 nm diode laser,a high-repetition-rate Er:Yb:YAl3(BO3)4 microchip laser passively Q-switched by a Co2+:MgAl2 O4 crystal is reported.At a quasi-continuous-wave pump power of 20 W,a 1553 nm passively ...End-pumped by a 976 nm diode laser,a high-repetition-rate Er:Yb:YAl3(BO3)4 microchip laser passively Q-switched by a Co2+:MgAl2 O4 crystal is reported.At a quasi-continuous-wave pump power of 20 W,a 1553 nm passively Q-switched laser with the repetition rate of 544 kHz,pulse duration of 8.3 ns,and pulse energy of 3.9 μJ was obtained.To the best of our knowledge,the 544 kHz is the highest reported value for the 1.5 μm passively Q-switched pulse laser.In the continuous-wave pumping experiment,the maximum repetition rate of 144 kHz with the pulse duration of 8.0 ns and pulse energy of 1.7 μJ was obtained at the incident pump power of 6.3 W.展开更多
The behavior of self-polarization emission in Nd∶Y_(3)Al_(5)O_(12)(YAG)=Cr^(4+)∶YAG lasers has been proved in some cases.However,the degree and direction of polarization were often sensitive and unstable.We experime...The behavior of self-polarization emission in Nd∶Y_(3)Al_(5)O_(12)(YAG)=Cr^(4+)∶YAG lasers has been proved in some cases.However,the degree and direction of polarization were often sensitive and unstable.We experimentally observed different beam profiles versus the angle of the polarizer relative to the polarization direction of the laser.In order to explore the polarization mechanism,the dynamics of intracavity polarized eigenmodes was analyzed theoretically.Simulative results were well consistent with our experimental observations.It indicated that the linear self-polarization emission was a composite state rather than an intrinsic state.This study contributed to the improvement of the polarization stability in Nd∶YAG=Cr^(4+)∶YAG passively Q-switched lasers.展开更多
基金the Central Publicinterest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences(1630052021026,1630052022008)the Major Science and Technology plan of Hainan Province(ZDKJ2021012)+1 种基金the National Key Research and Development Program of China(2018YFD1000500,2019YFD 1000500 and 2019YFD1001105)the Hainan Provincial Natural Science Foundation of China(320MS097).
文摘Cassava(Manihot esculenta Crantz)is a root crop significant in food security and various bio-industrial applications such as animal feed,modified starch,and biofuels.Drought and cold stress are two major factors limiting cassava production qualitatively and quantitatively,for which plants have evolved mechanisms to overcome the impact of these two stressors.In recent years,significant progress has been achieved in understanding the response mechanism of cassava plants to stress signals to tolerate the above stresses.In this review,core stress-signaling pathways,including transcription factor(TF)-related regulatory networks,plant hormone signaling,reactive oxygen species(ROS)scavenging,and non-coding RNA(ncRNA)and alternative splicing(AS)that modify gene expression levels in response to drought and/or cold stress in cassava,are summarized.Understanding these stress signaling and responses will increase our ability to improve the crops tolerance to multiple stresses for agricultural sustainability and food security for the growing world population.
基金supported by the National Natural Science Foundation of China (Nos.61875199 and 61975208)Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDB20000000)Science and Technology Service Network Initiative of the Chinese Academy of Sciences (No.KFJ-STS-QYZX-069)。
文摘End-pumped by a 976 nm diode laser,a high-repetition-rate Er:Yb:YAl3(BO3)4 microchip laser passively Q-switched by a Co2+:MgAl2 O4 crystal is reported.At a quasi-continuous-wave pump power of 20 W,a 1553 nm passively Q-switched laser with the repetition rate of 544 kHz,pulse duration of 8.3 ns,and pulse energy of 3.9 μJ was obtained.To the best of our knowledge,the 544 kHz is the highest reported value for the 1.5 μm passively Q-switched pulse laser.In the continuous-wave pumping experiment,the maximum repetition rate of 144 kHz with the pulse duration of 8.0 ns and pulse energy of 1.7 μJ was obtained at the incident pump power of 6.3 W.
基金supported by the National Natural Science Foundation of China(Nos.61575199,61875199,6197520851761135115)+1 种基金Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB20000000)Science Foundation of Fujian Province(No.2019J02015)。
文摘The behavior of self-polarization emission in Nd∶Y_(3)Al_(5)O_(12)(YAG)=Cr^(4+)∶YAG lasers has been proved in some cases.However,the degree and direction of polarization were often sensitive and unstable.We experimentally observed different beam profiles versus the angle of the polarizer relative to the polarization direction of the laser.In order to explore the polarization mechanism,the dynamics of intracavity polarized eigenmodes was analyzed theoretically.Simulative results were well consistent with our experimental observations.It indicated that the linear self-polarization emission was a composite state rather than an intrinsic state.This study contributed to the improvement of the polarization stability in Nd∶YAG=Cr^(4+)∶YAG passively Q-switched lasers.
