低温ストレスに応答したサツマイモ塊根のβ-アミラーゼ遺伝子およびストレス応答性転写因子の誘導(セミナー「低温/乾燥に適応した生物の生き残り戦略としての休眠」)

DOI Web Site

書誌事項

タイトル別名
  • Induction of β-amylase and an Environmental Stress-responsive Transcription Factor in Sweetpotato Tuber under Chilling Stress(Papers presented at the Seminar, "Dormancy in Organisms, its Role as a Survival Strategy to Adapt against Cold/Drought Stresses")
  • Induction of β-amylase and an Environmental Stress-responsive Transcription Factor in Sweetpotato Tuber under Chilling Stress

この論文をさがす

抄録

Low temperature have been broadly applied for storage technique of various vegetable and crops. Sweetpotato is one of the most popular crops grown in tropical and temperature regions. Because sweetpotato, originated from semi-tropical plants, is susceptible to cold stress, severe chilling stress by itself causes deterioration and/or irreversible damage in sweetpotato tuber tissues. However, mechanisms involved in physiological and biochemical changes of sweetpotato under chilling stress remain unclear. Thus, we focused on the gene expression profiles of cold stress-responsive transcriptional factors and carbohydrate metabolisms of sweetpotato in response to chilling stress. A sweetpotato homolog of Drought Responsive Element Binding factor (swDREB) is induced in sweetpotato within 6 h after treatment of chilling stresses. The expression of swDREB under chilling stress was maintained until 3 d. Chilling stress sequentially upregulated the expression of β-amylase (β-AMY) and trehalose-6-phosphate phosphatase (TPP). Increase of amylase activity and sugar content was also observed in sweet potato under chilling stress, These results suggest that swDREB mediates the expression of β-AMY and TPP via a cold stress-responsive transcription factor cascade, leading to degradation of starch in sweetpotato tuber and accumulation of maltose and trehalose.

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ