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Open AccessArticle

Differential Response of Sugar Beet to Long-Term Mild to Severe Salinity in a Soil–Pot Culture

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Department of Biochemistry and Molecular Biology, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
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Graduate School of Environmental and Life Science, Okayama University, Kita-ku, Okayama 700-8530, Japan
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Bangladesh Jute Research Institute, Manik Mia Avenue, Dhaka-1207, Bangladesh
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Graduate Training Institute, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
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Food Biochemistry Laboratory, Department of Biochemistry and Molecular Biology, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
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Department of Crop Botany, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
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Agronomy and Farming System Division, Bangladesh Sugar Crop Research Institute, Pabna 6620, Bangladesh
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Department of Plant Physiology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, 94976 Nitra, Slovakia
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Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources Czech University of Life Sciences, 16500 Prague, Czech Republic
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Author to whom correspondence should be addressed.
Agriculture 2019, 9(10), 223; https://doi.org/10.3390/agriculture9100223
Received: 20 July 2019 / Revised: 23 September 2019 / Accepted: 26 September 2019 / Published: 13 October 2019
Attempts to cultivate sugar beet (Beta vulgaris spp. vulgaris) in the sub-tropical saline soils are ongoing because of its excellent tolerance to salinity. However, the intrinsic adaptive physiology has not been discovered yet in the sub-tropical climatic conditions. In this study, we investigated morpho-physiological attributes, biochemical responses, and yield of sugar beet under a gradient of salinity in the soil–pot culture system to evaluate its adaptive mechanisms. Results exhibited that low and high salinity displayed a differential impact on growth, photosynthesis, and yield. Low to moderate salt stress (75 and 100 mM NaCl) showed no inhibition on growth and photosynthetic attributes. Accordingly, low salinity displayed simulative effect on chlorophyll and antioxidant enzymes activity which contributed to maintaining a balanced H2O2 accumulation and lipid peroxidation. Furthermore, relative water and proline content showed no alteration in low salinity. These factors contributed to improving the yield (tuber weight). On the contrary, 250 mM salinity showed a mostly inhibitory role on growth, photosynthesis, and yield. Collectively, our findings provide insights into the mild–moderate salt adaptation strategy in the soil culture test attributed to increased water content, elevation of photosynthetic pigment, better photosynthesis, and better management of oxidative stress. Therefore, cultivation of sugar beet in moderately saline-affected soils will ensure efficient utilization of lands. View Full-Text
Keywords: antioxidant enzymes; photosynthesis; reactive oxygen species; salinity; sugar beet; yield antioxidant enzymes; photosynthesis; reactive oxygen species; salinity; sugar beet; yield
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Tahjib-UI-Arif, M.; Sohag, A.A.M.; Afrin, S.; Bashar, K.K.; Afrin, T.; Mahamud, A.S.U.; Polash, M.A.S.; Hossain, M.T.; Sohel, M.A.T.; Brestic, M.; Murata, Y. Differential Response of Sugar Beet to Long-Term Mild to Severe Salinity in a Soil–Pot Culture. Agriculture 2019, 9, 223.

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