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Effects of Seed Treatment on Germination and Establishment of Oilseed Pennycress (Thlaspi arvense L.)

Koirala, Nasib
http://orcid.org/0000-0002-0477-9993
http://rave.ohiolink.edu/etdc/view?acc_num=osu1658311918285856

Abstract Details

2022, Master of Science, Ohio State University, Horticulture and Crop Science.
Oilseed pennycress (Thlaspi arvense L.) is an emerging biofuel crop targeted to be integrated into the corn-soybean rotational system in temperate regions as an alternative winter annual crop. Fall establishment has been identified as a major challenge for pennycress that should be addressed prior to widespread crop release. This study focused on improving germination and establishment using seed treatments including seed pelleting. The objectives were to assess 1) the effect of seed treatments and storage on seed germination and vigor of pennycress varieties, 2) various seed treatment components to increase germination of a wild pennycress improved line, and 3) the establishment of pennycress lines receiving different seed treatments in multiple field environments. For the first objective, a lab experiment with four pennycress varieties and four seed treatments with an added component of seed storage for up to 12 months in different temperatures was conducted during 2021/22. Seed pelleting was found to improve germination characteristics, but those benefits diminished when stored for more than 3 months, eventually leading to loss of seed vigor and germination compared to non-pelleted treatments. The loss of vigor over time was more prominent in cold storage. Results indicated seed treatment with GA can increase germination for black-seeded pennycress, though may be less effective for golden pennycress. The second objective was also addressed with a similar laboratory study conducted in 2021 with 12 seed treatments using a black-seeded improved wild pennycress line, MN106NS. There was consistent increase, in weight and size (142% in weight and 29% in size on average) of seed pellets (compared to non-pelleted seeds), and pelleting treatments did not vary in stability. Total germination increased compared to the control with all seed treatments, except the solo addition of fungicide. While all pelleting treatments improved germination, the use of GA as a soak treatment or as an addition during seed pelleting was most effective to increase germination. Field experiments at nine sites over 4 states in the midwestern US in the year 2021 was conducted to achieve the third objective. Fall establishment was assessed on two pennycress lines receiving six seed treatments. Establishment of the black-seeded pennycress variety was unchanged or improved with treatment under broadcast sowing while no such benefit was observed for the gold-seeded variety. Almost all seed pelleting treatments negatively impacted establishment of golden pennycress variety. The study indicates use of GA as a soak treatment in black-seeded pennycress for commercial uses could be effective. This study also highlights the need of further study with seed pelleting in pennycress and recommends dormancy breaking breeding programs in case of black-seeded pennycress line as it had higher vigor and establishment compared to golden seeded pennycress line.
Alexander Lindsey (Advisor)
Carin Helfer (Committee Member)
David Barker (Committee Member)
116 p.
Horticulture

Recommended Citations

Citations

  • Koirala, N. (2022). Effects of Seed Treatment on Germination and Establishment of Oilseed Pennycress (Thlaspi arvense L.) [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1658311918285856

    APA Style (7th edition)

  • Koirala, Nasib. Effects of Seed Treatment on Germination and Establishment of Oilseed Pennycress (Thlaspi arvense L.). 2022. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1658311918285856.

    MLA Style (8th edition)

  • Koirala, Nasib. "Effects of Seed Treatment on Germination and Establishment of Oilseed Pennycress (Thlaspi arvense L.)." Master's thesis, Ohio State University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=osu1658311918285856

    Chicago Manual of Style (17th edition)

osu1658311918285856
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