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Ultraviolet-B Radiation Alters Soybean Growth and Seed Quality

Food and Nutrition Sciences 2016年第1期7卷 55-66页

作者： K. Raja Reddy Hrusikesh Patro Suresh Lokhande Nacer Bellaloui Wei Gao Department of Plant and Soil Sciences Mississippi State University Mississippi State USA Department of Agronomy Orissa University of Agriculture & Technology Bhubaneswar India Department of Sociology Iowa State University Ames USA Crop Genetics Research Unit USDA-ARS Stoneville USA 5USDA-UV-B Monitoring Network Natural Resource Ecology Lab Colorado State University Fort Collins USA USDA-UV-B Monitoring Network Natural Resource Ecology Lab Colorado State University Fort Collins USA

Research on the effects of ultraviolet-B (UV-B) radiation on soybean seed quality is limited. The objective of this study was to quantify UV-B doses, 0, 5, 10 & 15 kJ•m–2•d–1, on soybean growth and seed quality. The experiment was conducted in the Soil-Plant-Atmosphere-Research (SPAR) facility. Chambers located at the R.R. Foil Plant Science Research Facility of Mississippi State University, Mississippi, USA, were used. Each SPAR chamber consists of a steel soil bin to accommodate the root system, a Plexiglas chamber to accommodate plant canopy and a heating, and cooling system connected to air ducts that pass conditioned air to cause leaf flutter through the plant canopy. The SPAR units, supported by an environmental monitoring and control systems, are networked to provide automatic acquisition and storage of the data, monitored every 10 seconds throughout the day and night. Soybean cultivar Pioneer 93Y92 (maturity group IV, Roundup Ready) was used in the study. The desired UV-B radiation was supplied by square-wave UV-B supplementation systems under near ambient PAR and delivered to plants for eight hours, each day, from 08:00 to 16:00 h by eight fluorescent UV-313 lamps. The results showed that increased UV-B did not influence many of the growth parameters because the treatments were imposed at mid-fruiting period. Seed quality parameters that are important for seed industry and human and animal nutrition were all affected by UV-B. Protein and palmitic and oleic acids declined linearly, while oil and linoleic and linolenic acid contents increased with increased UV-B. Sucrose, stachyose, and stearic acid contents showed quadratic trends, increased to about 4 - 5 kJ of UV-B and declined at higher doses. Thus, both current and projected UV-B radiation levels can modify soybean growth and seed quality. The functional algorithms developed in this study could be useful to develop UV-B- specific sub-models for soybean farm management and

关键词： Ultraviolet Radiation biomass parameter Seed Quality Soybean Nutrition Seed Composition

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