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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 235 - 243 (9page)
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Trehalose-6-phosphate synthase (TPS) plays an important regulatory role in the response of plants to multiple abiotic stresses. However, our knowledge of the stress tolerance functions of TPS genes in sweet potato (Ipomoea batatas [L.] Lam) remains limited. In the present study, we isolated and functionally characterized the sweet potato gene encoding TPS1, IbTPS1. Sequence analysis showed that IbTPS1 belongs to class I TPS proteins and harbors highly conserved acceptor (glucose- 6-phosphate [Glc6P]) and donor (uridine diphosphoglucose [UDP-Glc]) binding sites. The IbTPS1 gene showed the highest level of constitutive expression in leaves and storage roots of sweet potato plants and was induced by several environmental stresses including drought, salt, and heat shock. The IbTPS1 protein might be localized to the cytosol. Complementation assay of yeast tps1Δ and tps1Δtps2Δ growth-defective mutants confirmed the TPS activity of IbTPS1, and truncation of the N-terminal extension of IbTPS1 (ΔNIbTPS1) increased the catalytic activity of the protein. Additionally, expression of IbTPS1 in yeast conferred abiotic stress tolerance to dehydration, salinity, and oxidation, and expression of ΔNIbTPS1 further enhanced the tolerance to abiotic stresses. The results of this study advance our understanding of the functions of IbTPS1 under abiotic stress conditions. Our results suggest that the IbTPS1 gene is an excellent candidate for improving the stress tolerance of different crop plants.
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참고문헌 (48)
참고문헌 신청
Almeida AM / 2005 / Transformation of tobacco with an Arabidopsis thaliana gene involved in trehalose biosynthesis increases tolerance to several abiotic stresses / Euphytica 146:165~176
Avonce N / 2004 / The Arabidopsis trehalose-6-P synthase AtTPS1 gene is a regulator of glucose, abscisic acid, and stress signaling / Plant Physiol 135:3649~3659
Avonce N / 2006 / Insights on the evolution of trehalose biosynthesis / BMC Evol Biol 6:109
Chary SN / 2008 / Trehalose-6-phosphate synthase/phosphatase regulates cell shape and plant architecture in Arabidopsis / Plant Physiol 146:97~107
Clough SJ / 1998 / Floral dip : a simplified method for Agrobacterium-mediated transformation of Arabidopsis thaliana / Plant J 16:735~743
Avonce N / 2004 / The Arabidopsis trehalose-6-P synthase AtTPS1 gene is a regulator of glucose, abscisic acid, and stress signaling / Plant Physiol 135:3649~3659
Avonce N / 2006 / Insights on the evolution of trehalose biosynthesis / BMC Evol Biol 6:109
Chary SN / 2008 / Trehalose-6-phosphate synthase/phosphatase regulates cell shape and plant architecture in Arabidopsis / Plant Physiol 146:97~107
Clough SJ / 1998 / Floral dip : a simplified method for Agrobacterium-mediated transformation of Arabidopsis thaliana / Plant J 16:735~743
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