One-step hydrothermal synthesis of g-C

In this work, a ternary composite photocatalyst with layer structure was synthesized by a one-step hydrothermal method. The visible-light-driven layered ternary photocatalyst exhibited excellent photocatalytic performance for the degradation of tetracycline (TC). The degradation rate of TC reached 88.78% within 60 min under visible light exposure in presence of optimum ratio G-T-B-0.2, which is higher than pure g-C3N4, TiO2 and BiOBr. Scaning electron microscope (SEM), Transmission electron microscope (TEM), Xray diffractometer (XRD), Fourier transform infrared spectra (FTIR), spectrometer and X-ray photoelectron spectroscopy (XPS) were used to character the physicochemical properties of the synthesized samples. Photoelectrochemical measurements and radical trapping experiments revealed that the improvement of photocatalytic performance was mainly attributed to the rapid charge transfer at the interface of gC3N4/TiO2/BiOBr, which was benefit to the separation of photogenerated carriers and visible light absorption. This work provides a facile method for the synthesis of ternary heterojunctions, which has potential applications in environmental remediation

The C₂H₂ Transcription Factor Con7 Regulates Vegetative Growth, Cell Wall Integrity, Oxidative Stress, Asexual Sporulation, Appressorium and Hyphopodium Formation, and Pathogenicity in <i>Colletotrichum graminicola</i> and <i>Colletotrichum siamense</i>

The Colletotrichum genus is listed as one of the top 10 important plant pathogens, causing significant economic losses worldwide. The C2H2 zinc finger protein serves as a crucial transcription factor regulating growth and development in fungi. In this study, we identified two C2H2 transcription factors, CgrCon7 and CsCon7, in Colletotrichum graminicola and Colletotrichum siamense, as the orthologs of Con7p in Magnaporthe oryzae. Both CgrCon7 and CsCon7 have a typical C2H2 zinc finger domain and exhibit visible nuclear localization. Disrupting Cgrcon7 or Cscon7 led to a decreased growth rate, changes in cell wall integrity, and low tolerance to H2O2. Moreover, the deletion of Cgrcon7 or Cscon7 dramatically decreased conidial production, and their knockout mutants also lost the ability to produce appressoria and hyphopodia. Pathogenicity assays displayed that deleting Cgrcon7 or Cscon7 resulted in a complete loss of virulence. Transcriptome analysis showed that CgrCon7 and CsCon7 were involved in regulating many genes related to ROS detoxification, chitin synthesis, and cell wall degradation, etc. In conclusion, CgrCon7 and CsCon7 act as master transcription factors coordinating vegetative growth, oxidative stress response, cell wall integrity, asexual sporulation, appressorium formation, and pathogenicity in C. graminicola and C. siamense