An Agrobacterium transformant for producing an edible transgenic plant cell is provided. The Agrobacterium transformant includes a recombination plasmid containg a recombination DNA segment. The recombination DNA segment can be translated to a recombinated tomato ammonium transporter containing a hypotriglyceridemic peptide. Therefore, an edible transgenic plant cell includes the foregoing recombination DNA segment for producing a recombinated tomato ammonium transporter containing a hypotriglyceridemic peptide. Transformed with the recombinant plasmid via the Agrobacterium transformant, the transgenic edible plant will express and accumulate the recombinant tomato ammonium transporter in cells, therefore possess hypoglyceridemic activity.一種用於轉殖食用性植物細胞之農桿菌轉形株。此農桿菌轉形株至少包含具有重組去氧核醣核酸片段的重組質體。此重組去氧核醣核酸片段可編碼並轉譯為含有降血脂機能性胺基酸片段之重組番茄銨鹽轉運蛋白。因此,一種食用性轉基因植物細胞至少包含上述重組去氧核醣核酸片段,藉以轉譯產生含有降血脂機能性胺基酸片段之重組番茄銨鹽轉運蛋白。