Studies on the transcriptional regulation of fructan exohydrolase genes during regrowth after cutting in forage grasses

果聚糖外水解酶基因Pp6-FEH1在蒂莫西断枝基部被转录诱导。这表明Pp6-FEH1参与了切割后再生的能量供应。葡萄糖和蔗糖抑制Pp6-FEH1转录本的上调。低温对Pp6-FEH1的转录诱导也表明，Pp6-FEH1通过产生单糖（称为冷冻保护剂）参与了抗冻能力的提高。报告性实验揭示了启动子区域参与了蒂莫西FEH的冷诱导。

A fructan exohydrolase gene, Pp6-FEH1 was transcriptionally induced in basal parts of timothy after cutting. This suggests that Pp6-FEH1 is involved in the energy supply for regrowth after cutting. Glucose and sucrose inhibited the up-regulation of Pp6-FEH1 transcripts. Transcriptional induction of Pp6-FEH1 by cold also suggests its involvement in increase of freezing tolerance by producing mono-saccharides known as cryoprotectants. Reporter assay revealed the promoter region involved in the cold induction of timothy FEH.