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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 737 - 742 (6page)
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Sweetpotato (Ipomoea batatas [L.] Lam) is one of the most important food crops, as it ensures food and nutrition security in the face of climate change, given its high carbohydrate, antioxidant (carotenoid), dietary fber, and mineral contents. The Orange protein of sweetpotato (IbOr) shows high molecular chaperone activity. Previously, we showed that transgenic sweetpotato plants overexpressing the IbOr gene exhibited strong tolerance to abiotic stresses such as high temperature (47?°C) and drought, owing to the increased contents of carotenoids including β-carotene. Interestingly, the expression of the sweetpotato carotenoid cleavage dioxygenase 4 (IbCCD4) gene was also signifcantly up-regulated in IbOr-overexpressing sweetpotato plants. In this study, we confrmed that the IbCCD4 gene is highly expressed in carotenoid-rich leaves and storage roots of three types of sweetpotato cultivars, each with a diferent storage root color (pale yellow, orange, and purple). The IbCCD4 protein showed interaction with IbOr in yeast two-hybrid and pull-down assays. Additionally, in?vitro, carotenoid cleavage assays indicated that β-carotene is the major substrate of IbCCD4. Interestingly, the interaction between IbCCD4 and IbOr did not afect β-carotene degradation. Further characterization of the IbCCD4 gene in transgenic sweetpotato plants will provide new insights into carotenoid homeostasis under severe stress conditions.
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참고문헌 (28)
참고문헌 신청
Campbell R / 2010 / The metabolic and developmental roles of carotenoid cleavage dioxygenase4 from potato / Plant Physiol 154:656~664
Cazzonelli C / 2010 / Source to sink: regulation of carotenoid biosynthesis in plants / Trends Plant Sci 15:266~274
Chen H / 2018 / Genome-wide analysis of carotenoid cleavage oxygenase genes and their responses to various phytohormones and abiotic stresses in apple (Malus domestica) / Plant Physiol Biochem 123:81~93
Cho KS / 2016 / Expressing the sweetpotato orange gene in transgenic potato improves drought tolerance and marketable tuber production / C R Biol 339:207~213
Cunningham FX / 1998 / Genes and enzymes of carotenoids biosynthesis in plants / Annu Rev Plant Physiol Plant Mol Biol 49:557~583
Cazzonelli C / 2010 / Source to sink: regulation of carotenoid biosynthesis in plants / Trends Plant Sci 15:266~274
Chen H / 2018 / Genome-wide analysis of carotenoid cleavage oxygenase genes and their responses to various phytohormones and abiotic stresses in apple (Malus domestica) / Plant Physiol Biochem 123:81~93
Cho KS / 2016 / Expressing the sweetpotato orange gene in transgenic potato improves drought tolerance and marketable tuber production / C R Biol 339:207~213
Cunningham FX / 1998 / Genes and enzymes of carotenoids biosynthesis in plants / Annu Rev Plant Physiol Plant Mol Biol 49:557~583
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