塑末端氧化酶是大麦中类细胞生物发生所必需的
Megan Overlander-Chen1, Craig H Carlson1,2, Jason D Fiedler1,2
1USDA-ARS Cereals Research Unit, Edward T. Schafer Agriculture Research Center, Fargo, North Dakota, 58102, USA.
The Plant journal : for cell and molecular biology
|November 20, 2023
概括
在大麦中的Grandpa 1 (Gpa1) 基因,编码塑末端氧化酶 (PTOX),对于叶绿体生物发生和胡卜素合成至关重要. 它的突变通过影响光合作用和strigolactone通路影响植物生长,产量和耕作.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 农作物科学 农作物科学
背景情况:
- хлоропласт生物发生对于作物产量至关重要,但涉及复杂的核-塑沟通.
- 控制叶绿体发育的精确监管机制在很大程度上是未知的.
研究的目的:
- 通过基于地图的克隆来识别调节大麦中叶绿细胞发育的基因.
- 阐明鉴定出的基因在质细胞生物发生和植物发育中的分子功能.
主要方法:
- 基于地图的克隆被用来识别大1 (Gpa1) 基因在大麦中.
- 用CRISPR技术和基因转换来对候选基因进行功能验证.
- 进行基因表达和化学分析以调查突变的影响.
主要成果:
- 该Gpa1基因被映射到2H染色体上,并被确定为HORVU.MOREX.r3.2HG0213170,编码一个塑末端氧化酶 (PTOX).
- gpa1突变导致了变异,减少了生长和产量,增加了耕作,与抑制的胡卜素生物合成和光漂白有关.
- 突变物中的过度注与卡洛化物衍生性斯特里戈拉克顿的积累减少有关.
结论:
- 编码PTOX的基因HORVU.MOREX.r3.2HG0213170是Gpa1的因果基因,对于大麦的叶绿体生物生成至关重要.
- 在单和双中保持PTOX活性,以建立功能性叶绿体.
- 了解Gpa1提供了对叶绿体生物合成及其调节的见解,对作物改善有影响.
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