通过基因表达分析,重新解释黑米种子发育中的安东基氨酸生物合成
Choonseok Lee1, Yang-Seok Lee2, Ha-Cheol Hong3
1Department of Genetics and Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, Gyeonggi-do, Republic of Korea.
PloS one
|June 2, 2023
概括
米种子中的安托西亚宁生物合成是由特定的基因调节的. 黑米积累了氨3-葡萄糖化物 (C3G),基因表达与C3G水平呈正相关,确定了新的调节因素.
科学领域:
- 植物生物化学 植物生物化学
- 分子遗传学 分子遗传学
- 农作物科学 农作物科学
背景情况:
- 在大米种子中的安托西亚尼生物合成调节仍然不清楚.
- 了解基因表达对于控制反素含量至关重要.
研究的目的:
- 研究大米种子中安东素含量和基因表达之间的关系.
- 确定关键的基因和转录因子,涉及黑米中的安托西亚宁生物合成.
主要方法:
- 液体染色学/质谱学-质谱学 (LC/MS/MS) 用于氨3-葡萄糖化物 (C3G) 的量化.
- RNA测序 (RNA-seq) 用于分析基因表达特征.
- 定量实时聚合酶链反应 (qRT-PCR) 用于基因表达验证.
主要成果:
- 在黑米品种中观察到C3G的差异积累,在白米和红米中没有.
- 参与氨酸生物合成的基因,包括调节剂 (bHLHs,MYBs,WD40) 和结构基因 (CHS,F3H,F3 ́H,DFR,ANS),在黑米种子中被上调调.
- 在C3G数量和这些调节性和结构性基因的表达之间发现了正相关性.
结论:
- 鉴定出bHLH2和特定的MYB基因是黑米中安素生物合成的新型假定转录因子.
- 这项研究增强了对调节种子中安东素生物合成的分子机制的理解.
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