Utah State University DigitalCommons@USU All Graduate Theses and Dissertations Graduate Studies 12-2020 Nodulation and Growth of Shepherdia × utahensis ‘Torrey’ Ji-Jhong Chen Utah State University Follow this and additional works at: https://digitalcommons.usu.edu/etd Part of the Plant Sciences Commons Recommended Citation Chen, Ji-Jhong, "Nodulation and Growth of Shepherdia × utahensis ‘Torrey’" (2020). All Graduate Theses and Dissertations. 7946. https://digitalcommons.usu.edu/etd/7946 This Thesis is brought to you for free and open access by the Graduate Studies at DigitalCommons@USU. It has been accepted for inclusion in All Graduate Theses and Dissertations by an authorized administrator of DigitalCommons@USU. For more information, please contact
[email protected]. NODULATION AND GROWTH OF SHEPHERDIA ×UTAHENSIS ‘TORREY’ By Ji-Jhong Chen A thesis submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE in Plant Science Approved: ______________________ ____________________ Youping Sun, Ph.D. Larry Rupp, Ph.D. Major Professor Committee Member ______________________ ____________________ Jeanette Norton, Ph.D. Heidi Kratsch, Ph.D. Committee Member Committee Member _______________________________________ Richard Cutler, Ph.D. Interim Vice Provost of Graduate Studies UTAH STATE UNIVERSITY Logan, Utah 2020 ii Copyright © Ji-Jhong Chen 2020 All Rights Reserved iii ABSTRACT Nodulation and Growth of Shepherdia × utahensis ‘Torrey’ by Ji-Jhong Chen, Master of Science Utah State University, 2020 Major Professor: Dr. Youping Sun Department: Plants, Soils, and Climate Shepherdia × utahensis ‘Torrey’ (hybrid buffaloberry) (Elaegnaceae) is presumable an actinorhizal plant that can form nodules with actinobacteria, Frankia (a genus of nitrogen-fixing bacteria), to fix atmospheric nitrogen. However, high environmental nitrogen content inhibits nodule development and growth.