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184. Flavin-containing monooxygenases FMOGS-OXs integrate flowering transition and salt tolerance in Arabidopsis thaliana.

Author

Haiyan Zhao, Dong Li, Yuqi Liu, Tianqi Zhang, Xiaofei Zhao, Hongzhu Su, and Jing Li

Subjects
ARABIDOPSIS thaliana, MONOOXYGENASES, SALT, METABOLITES, CATALYTIC activity
Abstract

Salt stress substantially leads to flowering delay. The regulation of salt-induced late flowering has been studied at the transcriptional and protein levels; however, the involvement of secondary metabolites has rarely been investigated. Here, we report that FMOGS-OXs (EC 1.14.13.237), the enzymes that catalyze the biosynthesis of glucosinolates (GSLs), promote flowering transition in Arabidopsis thaliana. It has been reported that WRKY75 is a positive regulator, and MAF4 is a negative regulator of flowering transition. The products of FMOGS-OXs, methylsulfinylalkyl GSLs (MS GSLs), facilitate flowering by inducing WRKY75 and repressing the MAS-MAF4 module. We further show that the degradation of MS GSLs is involved in salt-induced late flowering and salt tolerance. Salt stress induces the expression of myrosinase genes, resulting in the degradation of MS GSLs, thereby relieving the promotion of WRKY75 and inhibition of MAF4, leading to delayed flowering. In addition, the degradation products derived from MS GSLs enhance salt tolerance. Previous studies have revealed that FMOGS-OXs exhibit alternative catalytic activity to form trimethylamine N-oxide (TMAO) under salt stress, which activates multiple stress-related genes to promote salt tolerance. Therefore, FMOGS-OXs integrate flowering transition and salt tolerance in various ways. Our study shed light on the functional diversity of GSLs and established a connection between flowering transition, salt resistance, and GSL metabolism. [ABSTRACT FROM AUTHOR]

Published
2024
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188. Exploratory application of a novel centre cross diaphragm method for the construction of large cross-section tunnels in soft ground

Author

Gang Zheng, Huiliang Li, Tianqi Zhang, Jibin Sun, Ruikun Wang, Huimin Qiu, and Yu Diao

Subjects
Geotechnical Engineering and Engineering Geology, Civil and Structural Engineering
Abstract

For tunnelling in urban areas, the current sequential excavation (SE) method usually increases the number of temporary drifts to achieve better control of surface settlements, which may prolong construction duration. In this case study, a four-drift SE method, termed the suspension-type centre cross diaphragm (S-CRD) method, was proposed and applied to the construction of a large cross-section tunnel in soft ground, where normally the six-drift double-side drift (DSD) method would be adopted. Field monitoring results and statistical data indicated that, in comparison with the six-drift DSD method, the four-drift S-CRD method achieved better control of the surface settlements while improving the efficiency of construction by 30%. The advantages of the S-CRD method, i.e., safe and rapid construction, were eminently clear.

Published
2023

200. Electric dipole modulation for boosting carrier recombination in green InP QLEDs under strong electron injection

Author

Tianqi Zhang, Pai Liu, Fangqing Zhao, Yangzhi Tan, Jiayun Sun, Xiangtian Xiao, Zhaojing Wang, Qingqian Wang, Fankai Zheng, Xiao Wei Sun, Dan Wu, Guichuan Xing, and Kai Wang

Subjects
General Engineering, General Materials Science, Bioengineering, General Chemistry, Atomic and Molecular Physics, and Optics
Abstract

Efficient green InP QLEDs with a high carrier recombination rate were demonstrated based on MoO3 electric dipole modulation.

Published
2023

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