Impact of high temperatures on the marketable tuber yield and related traits of potato |
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| Institution: | 1. Department of Plant Science, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;2. Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;1. Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-Gu, Daejeon 305-343, South Korea;2. Department of Environmental Energy Engineering, Kyonggi University, 94 San, Iui-dong, Youngtong-gu, Suwon-si, Gyeonggi-do, 442-760, Republic of Korea;1. Department of Plant Science, Seoul National University, Seoul 151-921, Republic of Korea;2. Department of Natural Resources and Environment, Thai Nguyen University of Agriculture and Forestry, Thai Nguyen City, Viet Nam;1. Potsdam Institute for Climate Impact Research, Research Domain II Climate Impacts & Vulnerabilities, 14473 Potsdam, Germany;2. Columbia University Center for Climate Systems Research, New York, NY 10025, USA;3. University of Chicago and ANL Computation Institute, Chicago, IL 60637, USA;4. National Agriculture and Research Organization, Institute for Agro-Environmental Sciences, Tsukuba, 305-8604, Japan;5. University of Minnesota, Institute on the Environment, Saint Paul, MN 55108, USA;6. NASA Goddard Institute for Space Studies, New York, NY 10025, USA;7. Karlsruhe Institute of Technology, IMK-IFU, 82467 Garmisch-Partenkirchen, Germany;8. International Institute for Applied Systems Analysis, Ecosystem Services and Management Program, 2361 Laxenburg, Austria;9. Comenius University in Bratislava, Department of Soil Science, 842 15 Bratislava, Slovak Republic;10. Laboratoire des Sciences du Climat et de l’Environnement, CEA CNRS UVSQ, Orme des Merisiers, 91191 Gif-sur-Yvette, France;11. Ludwig Maximilian University, Department of Geography, 80333 Munich, Germany;12. University of Maryland, Department of Geographical Sciences, College Park, MD 20742, USA;13. Texas A&M University, Texas AgriLife Research and Extension, Temple, TX 76502, USA;14. National Center for Atmospheric Research, Earth System Laboratory, Boulder, CO 80307, USA;15. Swiss Federal Institute of Aquatic Science and Technology, Eawag, CH-8600 Duebendorf, Switzerland;p. University of Birmingham, School of Geography, Earth & Environmental Science and Birmingham Institute of Forest Research, B15 2TT Birmingham, United Kingdom;q. University of Natural Resources and Life Sciences, Institute for Sustainable Economic Development, 1180 Vienna, Austria;r. Peking University, Sino-French Institute of Earth System Sciences, 100871 Beijing, China;s. Alterra Wageningen University and Research Centre, Earth Observation and Environmental Informatics, 6708PB Wageningen, Netherlands;1. CIMMYT, Sustainable Intensification Program, P.O. Box 1041-00621, Nairobi, Kenya;2. CIRAD, UPR-Agro-Ecology and Sustainable Intensification of Annual Crops, University of Montpellier, Avenue Agropolis, 34398 Montpellier, France;3. CIMMYT, Sustainable Intensification Program, P.O. Box 6-641 06600, Mexico, DF, Mexico;1. Estonian Crop Research Institute, Department of Agrotechnology, J. Aamissepa 1, Jõgeva, Estonia;2. Tallinn University of Technology, Institute of Marine Systems, Ehitajate tee 5, 19086 Tallinn, Estonia |
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| Abstract: | A rapid warming of 2.8–5.3 °C by the end of this century is expected in South Korea. Considering the current temperature during the spring potato growing season (emergence to harvest; ca. 18 °C), which is near the upper limit of the optimum temperature for potato yield, the anticipated warming will adversely affect potato production in South Korea. The present study assessed the impact of high temperature on the marketable tuber yield and related traits of cv. Superior (which makes up 71% of the annual potato production in South Korea) in four temperature-controlled plastic houses and an outdoor field (37.27°N, 126.99°E) during 2015–2016. The target temperatures of the four plastic houses were set to ambient (AT), AT+1.5 °C, AT+3.0 °C, and AT+5.0 °C. The marketable tuber yield was significantly reduced by 11% per 1 °C increase over a temperature range of 19.1–27.7 °C. The negative impact of high temperature was associated not only with the yield loss of total tubers, which was mostly explained by the slower tuber bulking rate, but also the reduced marketable tuber ratio under temperatures above 23 °C, which was mainly attributed to the reduced number of marketable tubers (r = 0.79***). Under moderate temperatures below 23 °C, the source limited the number of marketable tubers without reducing the marketable tuber ratio. In contrast, the number of marketable tubers was limited by the marketable tuber set at the early growth stage rather than the source under the higher temperatures, which resulted in the reduction in the marketable tuber ratio below 56%. These results suggest that the objectives of breeding and agronomic management for adapting to the rapid warming in South Korea should include maintaining the ability to form tubers at the early growth stage under high temperatures, as well as the photosynthetic capacity and sink strength of the tubers. |
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| Keywords: | Potato High temperature Marketable tuber yield Tuber bulking rate Marketable tuber ratio Marketable tuber set |
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