Mengzhan Li: Plant Physiology First Author

Mengzhan Li, first author of “SAUR15 interaction with BRI1 activates plasma membrane H+-ATPase to promote organ development of Arabidopsis”

Current Position: Ph.D. student in Prof. Suo-min Wang lab at Lanzhou University

Education: College of Pastoral Agriculture Science and Technology, Lanzhou University (B.S. and M.S.)

Non-scientific Interests: Reading

Brief bio: In 2015, I was fortunate to join Prof. Suo-min Wang lab at Lanzhou University under the supervision of Dr. Suo-min Wang and Dr. Hongju Yin. Our lab has been engaged in studying the adaptive mechanism of a typical xerophyte, Zygophyllum xanthoxylum, and found that the well-developed root system is one of the effective strategies for Z. xanthoxylum to cope with drought stress. However, the molecular mechanism of root development for this species is still unclear. Previously, we screened a large number of SAURs via analyzing transcriptome datasets of Z. xanthoxylum roots under osmotic stress treatment. Subsequently, function and mechanism of SAUR15 was studied by using Z. xanthoxylum and Arabidopsis. Our results suggest that, as the downstream target gene of ARF6 and ARF7 in auxin signaling pathway, SAUR15 promotes lateral and adventitious roots development via regulating PM H⁺-ATPase activity and auxin biosynthesis (https://doi.org/10.1104/pp.19.01250). In addition, we also show that, SAUR15 interacts with BRI1 in PM under BR treatment and enhances BRI1 phosphorylation status and kinase activity. The SAUR15-BRI1 module promotes direct activation of PM H⁺-ATPase to drive cell expansion-mediated organ development, which defines an alternate mode of BR signaling uncoupled from BIN2 (https://doi.org/10.1093/plphys/kiac194).

 

姓名：李孟湛

目前职务：博士研究生，兰州大学王锁民教授课题组

教育经历：兰州大学草地农业科技学院，学士/硕士

个人简介：

我于2015年有幸加入兰州大学王锁民教授团队，在王锁民老师和尹红菊老师的指导下开展学习科研工作。本团队长期致力于荒漠旱生植物霸王对逆境的适应机制研究，发现发达的根系是霸王抵御干旱胁迫的有效策略之一，然而其根系发育的分子机制尚不清楚。我们前期通过分析渗透胁迫下霸王根中表达谱数据，筛选到大量SAURs家族基因。随后分别以霸王和模式植物拟南芥为材料，进一步对SAUR15在植物生长发育中的功能及调控机理进行研究。证明SAUR15作为生长素信号转导途径中转录因子ARF6、ARF7的下游靶基因，通过调控质膜H⁺-ATPase活性及生长素的合成促进侧根及不定根的发育（https://doi.org/10.1104/pp.19.01250）。此外还发现，在响应BR时，SAUR15与BRI1在质膜上形成复合物以增强其磷酸化和激酶活性，SAUR15-BRI1通过激活质膜H⁺-ATPase，形成不依赖于BIN2的新的BR信号转导途径，在细胞伸长介导的多个器官生长发育中发挥重要作用（https://doi.org/10.1093/plphys/kiac194）。