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Open AccessArticle

Betaine Hydrochloride Treatment Affects Growth and Phenylpropanoid Accumulation in Tartary Buckwheat (Fagopyrum tataricum) Seedlings under Salt Stress

1
Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
2
Department of Medicinal and Industrial Crops, Korea National College of Agriculture & Fisheries, 1515, Kongjwipatjwi-Ro, Jeonju, Jeonbuk 54874, Korea
3
Division of Horticulture Industry, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Korea
4
Department of Plant Resources and Environment, Jeju National University, 102 Jejudaehak-ro, Jeju-si, Jeju 63243, Korea
*
Authors to whom correspondence should be addressed.
The two authors (Min Cheol Kim and Nam Su Kim) contributed equally to the article.
Agronomy 2020, 10(6), 906; https://doi.org/10.3390/agronomy10060906
Received: 16 May 2020 / Revised: 15 June 2020 / Accepted: 21 June 2020 / Published: 25 June 2020
Betaine is one of the most competitive compounds that accumulate in different cellular compartments to adjust osmotic balance. Among the various stressors, salinity stress often leads to osmotic and ionic stress in plants, either increasing or decreasing certain secondary plant metabolites. In this study, different concentrations of NaCl, betaine, and combined NaCl and betaine were used in time-course experiments to investigate growth pattern variation and accumulation of phenylpropanoid compounds in buckwheat sprouts. A significant increase in growth was observed with the application of 0.1–1.0 mM betaine. Although overall, the total phenylpropanoid compounds were lower compared to the control, the sole application of 50 mM NaCl and 1.0 mM betaine especially enhanced the accumulation of some of these compounds in comparison to others. Betaine application at lower concentrations was found to enhance the growth of buckwheat sprouts slightly. The results of this study show that phenylpropanoid content did not increase significantly in any of the treatments. However, it was proven that the phenylpropanoid biosynthetic pathway is stimulated under abiotic stress, resulting in a higher accumulation of various phenylpropanoid compounds. This suggests that the level of accumulation of phenylpropanoid compounds due to abiotic stress may be species-dependent. View Full-Text
Keywords: salt stress; betaine hydrochloride; Tartary buckwheat; phenylpropanoid salt stress; betaine hydrochloride; Tartary buckwheat; phenylpropanoid
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Kim, M.C.; Kim, N.S.; Kim, Y.B.; Kim, C.M.; Chung, Y.S.; Park, S.U. Betaine Hydrochloride Treatment Affects Growth and Phenylpropanoid Accumulation in Tartary Buckwheat (Fagopyrum tataricum) Seedlings under Salt Stress. Agronomy 2020, 10, 906.

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