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在Camellia sinensis中通过灌Pseudomonas knackmussii促进L-theanine的积累

Gang Zhou¹, Junchen Feng¹, Siran Yu¹

¹School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.

Plant cell reports

|July 14, 2025

概括

从茶叶植物中分离出了内菌细菌Pseudomonas knackmussii,以增加L-茶氨酸含量. 这一发现提供了一种新的方法,通过增加L-theanine水平来提高茶的质量和风味.

科学领域:

农业微生物学农业微生物学
植物生物技术植物生物技术
食品科学食品科学食品科学

背景情况:

氨酸增强了茶的感官属性,减轻了苦味.
某些茶季的低L-茶氨酸含量会影响品味质量.
果实菌体细菌代表了一条未被充分探索的农业增强途径.

研究的目的:

从Camellia sinensis中分离和识别能够合成L-theanine的内菌.
为了研究内菌在增加茶叶植物中的L-theanine含量的有效性.
为了确定在分离的细菌中参与L-theanine生物合成的特定基因.

主要方法:

从茶叶植物组织中分离和识别内菌.
培养Pseudomonas knackmussii并确定其L-氨酸生产能力.
使用内菌细菌和乙胺对茶叶植物苗进行灌实验.
用各种处理方法量化茶叶中的L-茶氨酸含量.

主要成果:

Pseudomonas knackmussii 被分离,鉴定,并发现它可以使用乙烯胺合成L-theanine.
用P. knackmussii灌显著增加了茶叶植物中的L-茶氨酸含量.
一个关键的基因,CDF86904.1 (L-氨酸合成酶),被确定为L-theanine生物合成.
结合内植物和乙胺的应用导致茶叶中的L-theanine水平大幅增加.

结论:

内生细菌,特别是Pseudomonas knackmussii,具有显著的潜力,可以增强茶叶植物中的L-茶氨酸生产.
这项研究提供了一种通过微生物干预改善茶叶质量的新策略.
这些发现对可持续茶叶生产和质量提升具有重要的理论和实践意义.

关键词:

伪omonas knackmussii 这种病毒是什么?l-氨酸合成酶 (GS) 的使用.一个 - 氨酸.它们是内植物 (Endophyte).乙烯胺是一种胺.夏季和秋季的茶叶,夏季和秋季的茶叶.

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