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Sweet sorghum [Sorghum biocolor (L.) Moench] is a C4 plant with high biomass productivity. As a high photosynthetic efficiency crop, it does not only produce grain, but also yields large amounts of sugar-rich stems. The sugar in stems is mainly sucrose (up to 55% of dry biomass), fructose and glucose[1], which are ideal for the production of liquid biofuels such as ethanol [2-3]. Besides these, its wide adaptability, resistance to semi-arid soils and water-logging characterize it as one of the most popular crop throughout the world. However, most of the present studies in sweet sorghum are focused on its utilization and the physiological study is rared.
As a high photosynthetic efficiency crop, it does not only produce grain, but also yields large amounts of sugar-rich stems. Sweet sugar is known as a “sweet sorghum” [Sorghum biocolor (L.) Moench] mainly sucrose (up to 55% of dry biomass), fructose and glucose [1], which are ideal for the production of liquid biofuels such as ethanol [2-3]. Besides these, its wide adaptability, resistance to semi-arid soils However, most of the present studies in sweet sorghum are focused on its utilization and the physiological study is rared.