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sensitivity detection Technique and Resistance Risk Assessment of Magnaporthe grisea to Tricyclazole

Rice science 2005年第1期12卷 68-74页

作者： ZHANGChuan-qing ZHOUMin_g-guo XUENa KeyLaboratoryofMonitoringandManagementofPlantDiseasesandInsects MinistryofAgricultureNanjingAgriculturalUniversityNanjing210095China

In vitro detection method for the sensitivity of Magnaporthe grisea to tricyclazole was studied, and the potential resistance risk of blast disease to tricyclazole was assessed. Both EC50 of hyphal melanization (EC50-H) and minimum inhibitive concentration of melanization in appressorial (MIC-A) by inhibitor tricyclazole showed positive correlation to the EC50 of tricyclazole against blast disease tested in vivo, with relative co-efficiency (R5) of 0.8995 and 0.8244, respectively. However, stability and reproducibility of EC50-H were better than those of MIC-A, suggesting that it could be used to detect the sensitivity of M. grisea to tricyclazole in vitro. Tricyclazole sensitivity of the progenies derived from single spores of the most sensitive isolate DY2 and the least sensitive isolate GY6 detected in sensitivity monitoring in 2000 was not stable, with mean EC50 values of 4.4968 μg/mL and 5.4010 ug/mL, respectively, indicating that the difference in EC50 between DY2 and GY6 was not caused probably by resistance variation. EC50 of GY6 did not increase significantly when continuously selected for twenty generations under the selection pressure of tricyclazole in vivo. However, the sensitivity of DY2 was decreased by 10-fold after selected for twenty generations. The results suggested that tricyclazole was still low resistance risk for M. grisea in China.

关键词： Magnaporthe grisea tricyclazole melanin biosynthesis sensitivity detection resistance risk assessment

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A high-sensitivity H2S gas sensor based on optimized ZnO-ZnS nano-heterojunction sensing material

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Chinese Chemical Letters 2020年第8期31卷 2050-2054页

作者： Pei Ding Dongsheng Xu Nan Dong Ying Chen Pengcheng Xu Dan Zheng Xinxin Li School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

This paper reports a high-performance H2S gas sensing material that is made of ZnO nanowires(NWs)modified by an optimal amount of ZnS to form nano-hete rojunctions.Compared with the intrinsic ZnONWs,the three differently modified nano-heterostructure material ZnO-ZnS-x(x=5,10,15)shows significant improvement in sensing performance to H2S at the working temperatures of 100-400℃,especially in the low temperature range(sensitivity application at low working temperature.

关键词： ZnO-ZnS heterojunction Hydrogen sulfide Gas sensor sensitivity detection Selectivity Band gap

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