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三体转录因子 PrASR3 调节了树种子中α-亚麻酸的积累

Weizong Yang¹, Lixin Niu², Ziwei Xin¹

¹College of Landscape Architecture, Nanjing Forestry University, Nanjing, 210037, China.

The Plant journal : for cell and molecular biology

|October 29, 2025

概括

一种新型的转录因子,PrASR3,抑制了树种子中的α-烯酸 (ALA) 积累. 它对PrPDAT2的抑制是由PrTCP14调节的,为改善油质提供了目标.

科学领域:

植物分子生物学植物分子生物学
脂质新陈代谢脂质新陈代谢
营养科学营养科学

背景情况:

阿尔法-烯酸 (ALA) 是一种必需的omega-3脂肪酸,对人类健康至关重要,主要来自植物.
树 (Paeonia rockii) 种子油是ALA的宝贵来源,PrPDAT2此前被认为对其积累很重要.
通过PrPDAT2调节的ALA积累的精确转录调节仍然不清楚.

研究的目的:

阐明了调节树种子中ALA积累的转录机制.
确定涉及控制油植物ALA水平的新型因素.
探索提高农作物油质量的潜在目标.

主要方法:

在树中识别和表征一种新的三转录因子 PrASR3.
分析Prasr3在调节PrPDAT2转录和ALA积累中的作用.
基因沉默和过度表达研究在树,尼科蒂亚娜·本塔米亚娜和阿拉比多普西斯·塔利亚纳.
研究PrASR3与TCP转录因子PrTCP14之间的相互作用.

主要成果:

通过直接抑制PrPDAT2转录,PrASR3被确定为ALA积累的抑制剂.
在 *N. benthamiana* 叶子和 *A. thaliana* 种子中过度表达 PrASR3 改变的脂肪酸组成.
在P. rockii种子中抑制Prasr3导致PrPDAT2的表达增加,并增强了ALA的积累.
发现prTCP14与prASR3相互作用,减弱了它对ALA积累的抑制作用.

结论:

PrASR3 作为种油 ALA 积累在树中的负调节剂.
PrASR3和PrTCP14之间的相互作用提供了一个调节机制,用于微调ALA水平.
这些发现加深了对植物ALA生物合成分子调节的理解.
PrASR3和PrTCP14代表了基因工程的潜在目标,以改善油作物的油质.

关键词:

这就是Prasr3的意义.种子油种子油种子油转录规则转录规则转录规则树木梨花梨花 α- 烯酸 α- 烯酸.

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