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Yongrui Xiao,Zhengle Zhang,Tiedong Ma 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.6
This paper mainly discusses the formation of second-order multi-agent systems with fixed and switching topologies by time-delayed impulsive control. The key issue is how to design an appropriate impulsive control algorithm to maintain a desired geometric formation with input delays and switching topologies between neighboring agents. First, according to the restriction of systems, the impulsive protocol is proposed for the follower agents. Then, by using the stability theory, some conditions are derived to ensure the formation consensus. Finally, the numerical examples illustrate the effectiveness and correctness of the designed impulsive control algorithm.
Molecular cloning, subcellular localization, and expression of BsWRKY51 gene from Bletilla striata
Wang Shuangshuang,Zheng Yuxia,Dou Quanli,Zhang Zhengling,Zeng Boping,Li Ying,Qian Yongchun,Ma Li 한국식물생명공학회 2024 Plant biotechnology reports Vol.18 No.2
The WRKY transcription factor family plays a key role in plant growth and development, hormone signaling, and resistance to environmental stress. In this study, we investigated the gene sequence, subcellular localization, and response pattern of a member of the WRKY transcription factor family to reveal its protein structure and involvement in the resistance signaling pathway.The BsWRKY51 gene was cloned by RT-PCR, and the structural characteristics of its encoded protein WRKY51 were analyzed by bioinformatics. The vector was next transiently transformed into tobacco to analyze the subcellular locali- zation, and real-time fluorescence quantitative PCR was performed to analyze the changes in the expression pattern of BsWRKY51. The BsWRKY51 gene has a coding sequence (CDS) length of 987 bp.The respective unstable hydrophilic protein BsWRKY51 is localized in the nucleus. It most closely related to the WRKY protein of Dendrobium catenatum in the Orchidaceae family. Fluorescence quantitative PCR results showed that the BsWRKY51 expression in the leaves was significantly higher than that in the roots, stems, and pseudobulbs of Bletilla striata seedlings. Under the conditions of salt and drought stress, the BsWRKY51 expression gradual increased and then a slightly decreased, and under salicylic acid (SA) treatment, the expression of BsWRKY51 showed an overall decreasing trend.The BsWRKY51 gene of Bletilla striata may play an important regulatory role in its salt and drought stress responses. Our present findings provide the foundation for elucidating the mechanisms of salt and drought tolerance in Bletilla striata and for breeding new varieties.