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A novel transcription factor CmMYB012 inhibits flavone and anthocyanin biosynthesis in response to high temperatures in chrysanthemum

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Horticulture Research 2021年第1期8卷 3548-3563页

作者： Li-Jie Zhou Zhiqiang Geng Yuxi Wang Yiguang Wang Shenhui Liu Chuwen Chen Aiping Song Jiafu Jiang Sumei Chen Fadi Chen State Key Laboratory of Crop Genetics and Germplasm Enhancement Key Laboratory of LandscapingMinistry of Agriculture and Rural AffairsKey Laboratory of Biology of Ornamental Plants in East ChinaNational Forestry and Grassland AdministrationCollege of HorticultureNanjing Agricultural UniversityNanjingJiangsu 210095China

Flavones are among the major colorless pigments synthesized through branches of the flavonoid pathway in ***,due to the absence of a gene encoding flavone synthase(FNS)in the model plant Arabidopsis thaliana species,the regulatory mechanism of FNS-catalyzed flavone biosynthesis has rarely been studied in ***,it was found that flavones play a predominant role in the elimination of excess reactive oxygen species(ROS)at high temperatures in colorless plant organs.A novel atypical subgroup 7(SG7)R2R3-MYB transcription factor,CmMYB012,was found to be induced in response to prolonged high temperatures and to inhibit flavone biosynthesis by directly regulating ***,CmMYB012 was also found to inhibit anthocyanin biosynthesis by suppressing the expression of CmCHS,CmDFR,CmANS,and ***012 overexpression exerted a negative in fluence on plant fitness and pink flower color formation,while CmMYB012 suppression had the opposite effect in response to high *** findings provide new insights into the mechanisms by which high temperatures regulate the metabolism of flavones and anthocyanins to affect plant fitness and flower color formation.

关键词： elimination subgroup metabolism

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Tin dioxide buffer layer-assisted efficiency and stability of wide-bandgap inverted perovskite solar cells

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Journal of Semiconductors 2022年第5期43卷 89-103页

作者： Bingbing Chen Pengyang Wang Ningyu Ren Renjie Li Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterSolar Energy Conversion CenterNankai UniversityTianjin 300350China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin 300350China Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Tianjin 300350China Collaborative Innovation Center of Chemical science and Engineering(Tianjin) Tianjin 300072China School of Physical science and Technology Inner Mongolia UniversityKey Laboratory of SemiconductorHohhot 010021China

Inverted perovskite solar cells(IPSCs) have attracted tremendous research interest in recent years due to their applications in perovskite/silicon tandem solar cells. However, further performance improvements and long-term stability issues are the main obstacles that deeply hinder the development of devices. Herein, we demonstrate a facile atomic layer deposition(ALD) processed tin dioxide(SnO2) as an additional buffer layer for efficient and stable wide-bandgap IPSCs. The additional buffer layer increases the shunt resistance and reduces the reverse current saturation density, resulting in the enhancement of efficiency from 19.23% to 21.13%. The target device with a bandgap of 1.63 eV obtains open-circuit voltage of 1.19 V, short circuit current density of 21.86 mA/cm^(2), and fill factor of 81.07%. More importantly, the compact and stable SnO_(2) film invests the IPSCs with superhydrophobicity, thus significantly enhancing the moisture resistance. Eventually, the target device can maintain 90% of its initial efficiency after 600 h storage in ambient conditions with relative humidity of 20%–40% without encapsulation. The ALD-processed SnO_(2) provides a promising way to boost the efficiency and stability of IPSCs, and a great potential for perovskite-based tandem solar cells in the near future.

关键词： atomic layer deposition tin dioxide additional buffer layer efficiency and stability inverted perovskite solar cells

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