Search

Nanopatterned poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) layers fabricated by soft-nanoimprint were applied to CH3NH3PbBr3 (MAPbBr3) light-emitting diodes to enhance light extraction. The electric field distribution of MAPbBr3 devices with different periods of the nanopatterned PEDOT:PSS was calculated using the finite-difference time-domain method, demonstrating that the 400-nm period was more effective in improving light outcoupling. By integrating the nanopatterned PEDOT:PSS layer, the external quantum efficiency of the device increased from 6.5% to 10.3%. It can be attributed to the fact that the nanopatterned structure reduced the refractive index discontinuity at the interface between MAPbBr3 and PEDOT:PSS, thereby reducing light trapping in the waveguide mode. [ABSTRACT FROM AUTHOR]

Aboveground net primary productivity (ANPP) of grassland influenced by both environmental factors and structural plant community attributes indicates its growth situation and ability to provide ecosystem services. However, previous works have focused on the effects of either environmental factors or plant community attributes on ANPP, which makes it difficult to quantify the effect pathways of environmental factors and plant community attributes on ANPP. In our study, we took a temperate grassland in the agropastoral ecotone of northern China as the research area and quantified the effects of environmental factors and plant community attributes on grassland ANPP with a structural equation model, together with correlation and partial correlation analyses. We found that growing season precipitation is the most critical factor for grassland ANPP, and its direct effect (standardized direct positive effect, SDE = 0.401, p < 0.05) on ANPP was the main path. Temperature affected ANPP directly (SDE = 0.230, p < 0.05) and indirectly (standardized indirect positive effect SIE = 0.110, p < 0.05) mainly through community attributes in the area, such as tiller number and cover. The increase in soil sand content reduced tiller number and further affected ANPP (SIE = 0.011, p < 0.05). Human population influenced ANPP through species diversity (SIE = −0.059, p < 0.05), and the increase in livestock number worked on ANPP by degrading the soil. Our results imply that improving grassland community attributes, such as maintaining species diversity and increasing vegetation coverage, will effectively mitigate the negative effects of climate change. [ABSTRACT FROM AUTHOR]

In the temperate grasslands of northern China, there exists a large range of soil texture. However, previous studies have mainly focused on the effect of climate water deficit on plant traits and have paid little attention to the effect of soil water deficit because grasses tend to use rainfall water directly. We measured eight drought‐related plant traits of 12 widely distributed perennial species in the temperate grassland in northern China and examined drought‐related plant traits under different aridity index ([ET0 − P]/ET0) and soil sand/clay ratio. The 12 species were categorized into three functional groups: fibrous‐rooted C4 species, fibrous‐rooted C3 species, and tap‐rooted C3 species. Our results showed that increasing climate drought had influence on all selected functional groups, and the influence on aboveground biomass and height was especially large on fibrous‐rooted C3 species. Coarse soil led to increased root length of fibrous‐rooted C3 and tap‐rooted C3 species. Our results imply that root system can be important to plant responses under drought, and soil texture can have influence on plant, though most of the traits show resistance to coarser soil. [ABSTRACT FROM AUTHOR]

Evolutionarily conserved SCAN (named after SRE-ZBP, CTfin51, AW-1, and Number 18 cDNA)-domain-containing zinc finger transcription factors (ZSCAN) have been found in both mouse and human genomes. Zscan4 is transiently expressed during zygotic genome activation (ZGA) in preimplantation embryos and induced pluripotent stem cell (iPSC) reprogramming. However, little is known about the mechanism of Zscan4 underlying these processes of cell fate control. Here, we show that Zscan4f, a representative of ZSCAN proteins, is able to recruit Tet2 through its SCAN domain. The Zscan4f-Tet2 interaction promotes DNA demethylation and regulates the expression of target genes, particularly those encoding glycolytic enzymes and proteasome subunits. Zscan4f regulates metabolic rewiring, enhances proteasome function, and ultimately promotes iPSC generation. These results identify Zscan4f as an important partner of Tet2 in regulating target genes and promoting iPSC generation and suggest a possible and common mechanism shared by SCAN family transcription factors to recruit ten-eleven translocation (TET) DNA dioxygenases to regulate diverse cellular processes, including reprogramming. • Zscan4f is a sequence-specific DNA-binding transcription factor • Zscan4f, a representative of ZSCAN proteins, is a functional partner for Tet2 • The ZSCAN4-TET2 complex regulates metabolic rewiring and activates proteasome activity • Recruiting TET may represent a general biochemical mechanism of ZSCAN proteins Cheng et al. show that Zscan4f recruits Tet2 to target gene promoters, promotes DNA demethylation, regulates metabolic rewiring, and activates proteasome activity, indicating a mechanism of Zscan4 to control cell fate. This study also uncovers a potential and common biochemical mechanism shared by the SCAN family to recruit TET enzymes. [ABSTRACT FROM AUTHOR]