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 ( 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 (