Excessively tilted fiber gratings(ExTFGs)are a type of special optical fiber grating device different from traditional fiber Bragg gratings,long period fiber gratings,and tilted fiber Bragg gratings.Due to the excessi...Excessively tilted fiber gratings(ExTFGs)are a type of special optical fiber grating device different from traditional fiber Bragg gratings,long period fiber gratings,and tilted fiber Bragg gratings.Due to the excessively tilted fiber fringe structure in the fiber core,ExTFGs could couple the light of the core mode into the high-order forward-propagating cladding modes,which would split into two sets of polarization dependent modes resulting in dual-peak resonances in the transmission spectrum.ExTFGs have the properties of the high refractive index sensitivity and low thermal crosstalk,which makes them very suitable for biochemical sensing applications.This paper will review the development of ExTFGs in terms of the mode coupling behavior,spectra characteristic,especially the refractive index sensitivity enhancement,biochemical modification methods of the sensor,and their applications in the bio-chemical sensing area,including pondus hydrogenii(pH)heavy metal ions,humidity,glucose,and immune sensing for various animal virus and biomarkers.Moreover,several composite sensing structures based on ExTFGs will be summarized.展开更多
The bacterial pathogen Xanthomonas oryzae pv.oryzae(Xoo),belonging to Xanthomonas sp.,causes one of the most destructive vascular diseases in rice worldwide,particularly in Asia and Africa.To better understand Xoo pat...The bacterial pathogen Xanthomonas oryzae pv.oryzae(Xoo),belonging to Xanthomonas sp.,causes one of the most destructive vascular diseases in rice worldwide,particularly in Asia and Africa.To better understand Xoo pathogenesis,we performed genome sequencing of the Korea race 1 strain DY89031(J18)and analyzed the phylogenetic tree of 63 Xoo strains.We found that the rich diversity of evolutionary features is likely associated with the rice cultivation regions.Further,virulence effector proteins secreted by the type III secretion system(T3SS)of Xoo showed pathogenesis divergence.The genome of DY89031 shows a remarkable difference from that of the widely prevailed Philippines race 6 strain PXO99A,which is avirulent to rice Xa21,a well-known disease resistance(R)gene that can be broken down by DY89031.Interestingly,plant inoculation experiments with the PXO99A transformants expressing the DY89031 genes enabled us to identify additional TAL(transcription activator-like)and non-TAL effectors that may support DY89031-specific virulence.Characterization of DY89031 genome and identification of new effectors will facilitate the investigation of the rice-Xoo interaction and new mechanisms involved.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.61875026)the Chongqing Talents Program(Grant No.CSTC2021YCJH-BGZXM0128)+2 种基金Key Project of Science and Technology Research of Chongqing Education Commission(Grant No.KJZDK202201106)Chongqing Natural Science Fund Innovation and Development Joint fund(Grant No.CSTB2023NSCQ-LZX0008)Chongqing University of Technology Research and Innovation Team Cultivation Program(Grant No.2023TDZ002).
文摘Excessively tilted fiber gratings(ExTFGs)are a type of special optical fiber grating device different from traditional fiber Bragg gratings,long period fiber gratings,and tilted fiber Bragg gratings.Due to the excessively tilted fiber fringe structure in the fiber core,ExTFGs could couple the light of the core mode into the high-order forward-propagating cladding modes,which would split into two sets of polarization dependent modes resulting in dual-peak resonances in the transmission spectrum.ExTFGs have the properties of the high refractive index sensitivity and low thermal crosstalk,which makes them very suitable for biochemical sensing applications.This paper will review the development of ExTFGs in terms of the mode coupling behavior,spectra characteristic,especially the refractive index sensitivity enhancement,biochemical modification methods of the sensor,and their applications in the bio-chemical sensing area,including pondus hydrogenii(pH)heavy metal ions,humidity,glucose,and immune sensing for various animal virus and biomarkers.Moreover,several composite sensing structures based on ExTFGs will be summarized.
基金supported by Chinese Academy of Sciences(XDB27040201)the National Natural Science Foundation of China(3181101746)。
文摘The bacterial pathogen Xanthomonas oryzae pv.oryzae(Xoo),belonging to Xanthomonas sp.,causes one of the most destructive vascular diseases in rice worldwide,particularly in Asia and Africa.To better understand Xoo pathogenesis,we performed genome sequencing of the Korea race 1 strain DY89031(J18)and analyzed the phylogenetic tree of 63 Xoo strains.We found that the rich diversity of evolutionary features is likely associated with the rice cultivation regions.Further,virulence effector proteins secreted by the type III secretion system(T3SS)of Xoo showed pathogenesis divergence.The genome of DY89031 shows a remarkable difference from that of the widely prevailed Philippines race 6 strain PXO99A,which is avirulent to rice Xa21,a well-known disease resistance(R)gene that can be broken down by DY89031.Interestingly,plant inoculation experiments with the PXO99A transformants expressing the DY89031 genes enabled us to identify additional TAL(transcription activator-like)and non-TAL effectors that may support DY89031-specific virulence.Characterization of DY89031 genome and identification of new effectors will facilitate the investigation of the rice-Xoo interaction and new mechanisms involved.
