Effect of Dielectric Barrier Discharge Cold Plasma on Pea Seed Growth

2019/09/06 by Xiaoting Gao, Ai Zhang, Paul Héroux +9 · 13 citations
Medicine · Materials Science · Engineering · #Plasma Applications and Diagnostics #Surface Modification and Superhydrophobicity #Electrohydrodynamics and Fluid Dynamics

paper · doi:10.1021/acs.jafc.9b03099

Abstract

Traditional seed pretreatment methods cause secondary pollution for the application of various chemicals. This study investigated the effect of dielectric barrier discharge (DBD) cold plasma on seedling growth. Effects of plasma-activated tap water (PATW) and plasma-activated seeds (PAS) were compared for germination rates, seedling height, dry weight, and chlorophyll content. Results show that compared with controls these growth parameters were all increased by more than 50%. The yields and contributions of hydrogen peroxide, nitrate, nitrite, and ammonium were quantified. Hydrogen peroxide and nitrate have an important role in seedling growth. By etching, the seed epidermis free radicals can reduce the apparent contact angle and increase the water absorption of the seeds. In addition to the low cost of PATW and PAS compared with commercial fertilizers, DBD does not involve any chemical addition. Thus, both PATW and PAS can be an alternative for improvement of agricultural production.

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