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Dr. Courtney Hollender, Michigan State University
November 28, 2022 @ 1:30 pm - 2:30 pm
The Mysterious Case of The Weeping Peach & Other Fruitful Adventures into The Regulation of Plant Architecture
Courtney Hollender, Ph.D., Assistant Professor of Horticulture at Michigan State University
My research program is focused on answering fundamental questions about plant growth and development that are applicable to tree fruit production. Shoot architecture is an area of development that significantly impacts orchard management practices. To establish and maintain high-density orchards, a considerable amount of effort is put into directing branch growth. For this reason, my lab has been studying the genes and processes involved in the regulation of the branch angles and orientations in plants. Over the course of this seminar, I will present what we know about molecular functions of my three favorite architecture genes: WEEP, TAC1, and LAZY1. The WEEP gene promotes upward shoot tip orientation, while LAZY1 promotes the formation of narrow branch angles and upward branch orientations. Both appear to function in the classic gravity response pathway, which involves the formation of asymmetric auxin concentrations. TAC1, in contrast, promotes the formation of wide branch angles and outward branch orientations. Our research suggests TAC1 promotes wide shoot orientations in plants by integrating light signaling into the LAZY1 gravity response pathway.
The GGA Seminar Series is held In-Person and on Zoom: https://ncsu.zoom.us/j/99920963547?pwd=alRnK21UMDVHRVgxT2tWa3JoK1pPdz09