논문 (학술지)
The MYB96 Transcription Factor Regulates Triacylglycerol Accumulation by Activating DGAT1 and PDAT1 Expression in Arabidopsis Seeds
| 등록번호 | RPMS-2019-0190732442 | SCI 구분
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※구분 : SCI(SCIE포함), 비SCI |
SCI |
|---|---|---|---|
| 저자명 (주·공동저자) | Lee Hong Gil; Kim Hyojin; Suh Mi Chung; Kim Hyun Uk; Seo Pil Joon | ||
| 논문구분 | 국외전문학술지 | 학술지명 | PLANT AND CELL PHYSIOLOGY |
| ISSN | 0032-0781 | 학술지 출판일자 | 2018-07-01 |
| 학술지 볼륨번호 | 59 | 논문페이지 | 1432 ~ 1442 |
| 학술지 임팩트팩터 | 4.76 | 기여율 | 20 % |
| DOI | 10.1093/pcp/pcy073 | ||
| 초록 | Maturing seeds stimulate fatty acid (FA) biosynthesis and triacylglycerol (TAG) accumulation to ensure carbon and energy reserves. Transcriptional reprogramming is a key regulatory scheme in seed oil accumulation. In particular, TAG assembly is mainly controlled by the transcriptional regulation of two key enzymes, acyl-CoA:diacylglycerol acyltransferase 1 (DGAT1) and phospholipid:diacylglycerol acyltransferase 1 (PDAT1), in Arabidopsis seeds. However, the transcriptional regulators of these enzymes are as yet unknown. Here, we report that the R2R3-type MYB96 transcription factor regulates seed oil accumulation by activating the genes encoding DGAT1 and PDAT1, the rate-limiting enzymes of the last step of TAG assembly. Total FA levels are significantly elevated in MYB96-overexpressing transgenic seeds, but reduced in MYB96-deficient mutant seeds. Notably, MYB96 regulation of TAG accumulation is independent of WRINKLED 1 (WRI1)-mediated FA biosynthesis. Taken together, our findings indicate that FA biosynthesis and TAG accumulation are under independent transcriptional control, and MYB96 is mainly responsible for TAG assembly in seeds. | ||
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