Sucrose transporter protein SbSUT5 gene sourced from plant, and application thereof

The invention discloses a sucrose transporter protein SbSUT5 gene sourced from plants, and an application thereof. The protein provided by the invention is sourced from sorghum bicolor (L.) Moench, and is a protein composed of an amino acid residue sequence shown in the sequence 1. The SbSUT5 and a coding gene thereof have important practical values in cultivation of sorghum bicolor and other plant novel breeds with improved sugar accumulation. Especially, sorghum bicolor has two libraries which are a grain library and a stem library, different from a single library of other monocot crops (such as a grain library of paddy rice and a stem library of sugar cane). The sorghum bicolor is representative in sucrose transportation, and can be researches as a model plant of sucrose transportation. With the invention, novel theoretical knowledge can be provided for people to understand SUT functions, and distribution ratios of sucrose in different library tissues of sorghum bicolor can be artificially controlled. Sorghum bicolor carbohydrate metabolism can be regulated, such that a novel approach is provided for improving sorghum bicolor ethanol production index and economic benefits.