| 1 | ZmMS1/ZmLBD30-orchestrated transcriptional regulatory networks precisely control pollen exine development显示文摘Because of its significance for plant male fertility and,hence,direct impact on crop yield,pollen exine development has inspired decades of scientific inquiry.However,the molecularmechanismunderlying exine formation and thickness remains elusive.In this study,we identified that a previously unrecognized repressor,ZmMS1/ZmLBD30,controls proper pollen exine development in maize.Using an ms1 mutant with aberrantly thickened exine,we cloned a male-sterility gene,ZmMs1,which encodes a tapetum-specific lateral organ boundary domain transcription factor,ZmLBD30.Weshowed thatZmMs1/ZmLBD30 is initially turned on by a transcriptional activation cascade of ZmbHLH51-ZmMYB84-ZmMS7,and then it serves as a repressor to shut down this cascade via feedback repression to ensure timely tapetal degeneration and proper level of exine.This activation-feedback repression loop regulating male fertility is conserved in maize and sorghum,and similar regulatory mechanism may also exist in other flowering plants such as rice and Arabidopsis.Collectively,these findings reveal a novel regulatory mechanism of pollen exine development by which a long-sought master repressor of upstream activators prevents excessive exine formation. | Quancan Hou Xueli An Biao Ma Suowei Wu Xun Wei Tingwei Yan Yan Zhou Taotao Zhu Ke Xie Danfeng Zhang Ziwen Li Lina Zhao Canfang Niu Yan Long Chang Liu WeiZhao FeiNi Jinping Li Daolin Fu Zhong-NanYang Xiangyuan Wan | 2023 | Molecular Plant2023，16，8： | 0 |
| 2 | Reformation of thiophene-functionalized phthalocyanine isomers for defect passivation to achieve stable and efficient perovskite solar cells显示文摘Lewis acid–base passivation is a significant technique to achieve structural stability of perovskite solar cells(PSCs) by overcoming the issues of wide grain boundaries, crystal defects, and the instability of PSCs. In this work, the combined effects of thiophene with phthalocyanine(Pc) as isomers(S2 and S3)on the photovoltaic performance of PSCs were studied for the first time. Through density functional theory calculations, we confirmed that the position of the S atom in the structure affects Lewis acid–base interactions with under-coordinated Pb^(2+) sites. The morphology of methylammonium lead iodide(MAPbI_(3)) for passivated devices was improved and thin dense layers with compact surface and large grain size were observed, leading to improvement of the charge extraction ability and reduction of non-radiative recombination and the trap density. A highest power conversion efficiency of 18% was achieved for the Pc S3 passivated device, which was 6.69% more than that of the controlled device.Furthermore, the Pcs passivated devices demonstrated remarkable stability under high-moisture and high-temperature conditions. | Geping Qu Danish Khan Feini Yan Armağan Atsay Hui Xiao Qian Chen Hu Xu Ilgın Nar Zong-Xiang Xu | 2022 | Journal of Energy Chemistry2022，31，4： | 0 |
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