黑色素调解了MeJA压力下的大麦芽中酸的积累
Xin Tian1, Renjiao Zhang1, Zhengfei Yang1
1College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China.
Frontiers in nutrition
|June 20, 2024
概括
黑素 (MT) 增强了酸的产生和大麦芽的生长,大麦芽受到甲基斯酸 (MeJA) 的压力. MT可以增强抗氧化酶和关键基因表达,抵消MeJA.
科学领域:
- 植物生理学 植物生理学
- 生物化学 生物化学
- 植物新陈代谢 植物新陈代谢
背景情况:
- 酸,植物二次代谢物,具有显著的健康益处,包括抗氧化,抗癌和抗衰老的特性,使富含酸的食物是可取的.
- 已知甲基斯酸 (MeJA) 会增加植物中的酸积累,但通常会抑制芽生长.
- 植物激素氨酸 (MT) 减轻非生物压力,促进植物新陈代谢.
研究的目的:
- 调查外源性黑激素 (MT) 影响大麦芽中生长,发育和酸代谢的潜在机制,这些芽接受了甲基莉酸盐 (MeJA) 处理.
主要方法:
- 对酶活动的分析,包括烯氨酸氨基酶和酸4-氧酶.
- 对参与酸生物合成的关键酶的基因表达的定量评估.
- 测量抗氧化酶活动,氧化 (NO) 含量和离子 (Ca2+) 爆发.
- 使用DL-4-Chlorophenylalanine来阐明信号通路的抑制研究.
主要成果:
- MT显著增加了酸含量,通过增强关键酶的活性和基因表达,如氨氨酶和酸4-氧酶.
- MT缓解了大麦芽中MeJA诱导的生长抑制,与增加的抗氧化酶活性和基因表达相关.
- 在MeJA压力下的大麦芽中,MT提高了NO水平,并诱导了Ca2+爆发,这表明它在压力信号中发挥了作用.
结论:
- 外源性黑激素有效地改善了由MeJA压力引起的大麦芽的生长抑制.
- 黑色素促进了大麦芽中的酸的生物合成,可能是通过对特定生物合成途径基因和酶的上调调节.
- 对MeJA压力的MT的保护作用包括对抗氧化剂系统和信号通路的调节,包括NO和Ca2+.
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