Martin Gibbs Medal
The Martin Gibbs Medal was instituted by the Society’s executive committee in 1993 to honor Martin Gibbs, editor of Plant Physiology from 1963 to 1992. The Gibbs Medal is presented biennially to an individual who has pioneered advances that have served to establish new directions of investigation in the plant sciences. The winner will receive the medal and will be invited to convene a Martin Gibbs Medal Symposium at the annual meeting the following year.
2025 Winner: Mark Estelle
Mark Estelle is awarded the 2025 Martin Gibbs Medal for his pioneering contributions to understanding the mechanisms of plant hormone signaling. His research has led to the elucidation of the signal transduction pathway for the plant hormone auxin, which regulates a multitude of plant growth and developmental responses. Mark’s research on auxin has established a new paradigm in plant hormone signaling and has a profound impact on all of plant biology. Mark received his PhD in Genetics from the University of Alberta, and he initiated his research on auxin as a postdoc with Chris Somerville at Michigan State University. He has been a faculty member at Indiana University and the University of Texas at Austin, and from 2008 at the University of California, San Diego. Mark is also a Fellow of the American Association for the Advancement of Science, a member of the U.S. National Academy of Sciences, and a Pioneer member of ASPB.
Venkatesan Sundaresan, Chair (2023-2029)
Xeumei Chen, Past Winner (2024-2025)
Nicholas Carpita (2023-2025)
Jose Feijo (2024-2027)
Sylvia Lee, Staff Liaison

