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| Content Provider | Springer Nature Link |
|---|---|
| Author | Morita, Yasumasa Ishiguro, Kanako Tanaka, Yoshikazu Iida, Shigeru Hoshi, Atsushi |
| Copyright Year | 2015 |
| Abstract | UDP-glucose:flavonoid 3- O -glucosyltransferase is essential for maintaining proper production quantity, acylation, and glucosylation of anthocyanin, and defects cause pale and dull flower pigmentation in morning glories. The Japanese (Ipomoea nil) and the common (I. purpurea) morning glory display bright blue and dark purple flowers, respectively. These flowers contain acylated and glucosylated anthocyanin pigments, and a number of flower color mutants have been isolated in I. nil. Of these, the duskish mutants of I. nil produce pale- and dull-colored flowers. We found that the Duskish gene encodes UDP-glucose:flavonoid 3-O-glucosyltransferase (3GT). The duskish-1 mutation is a frameshift mutation caused by a 4-bp insertion, and duskish-2 is an insertion of a DNA transposon, Tpn10, at 1.3 kb upstream of the 3GT start codon. In the duskish-2 mutant, excision of Tpn10 is responsible for restoration of the expression of the 3GT gene. The recombinant 3GT protein displays expected 3GT enzymatic activities to catalyze 3-O-glucosylation of anthocyanidins in vitro. Anthocyanin analysis of a duskish-2 mutant and its germinal revertant showing pale and normal pigmented flowers, respectively, revealed that the mutation caused around 80 % reduction of anthocyanin accumulation. We further characterized two I. purpurea mutants showing pale brownish-red flowers, and found that they carry the same frameshift mutation in the 3GT gene. Most of the flower anthocyanins in the mutants were previously found to be anthocyanidin 3-O-glucosides lacking several caffeic acid and glucose moieties that are attached to the anthocyanins in the wild-type plants. These results indicated that 3GT is essential not only for production, but also for proper acylation and glucosylation, of anthocyanin in the morning glories. |
| Starting Page | 575 |
| Ending Page | 587 |
| Page Count | 13 |
| File Format | |
| ISSN | 00320935 |
| Journal | Planta |
| Volume Number | 242 |
| Issue Number | 3 |
| e-ISSN | 14322048 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2015-05-26 |
| Publisher Place | Berlin/Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Anthocyanin Flavonoid Flower pigmentation Ipomoea Plant Sciences Agriculture Ecology Forestry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science |
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