细菌群体感应信号n -3-氧己醇-高丝氨酸内酯增强拟南芥和小麦的耐盐性。

IF 4.1 3区 生物学 Q1 PLANT SCIENCES Botanical Studies Pub Date : 2020-03-10 DOI:10.1186/s40529-020-00283-5
Qian Zhao, Xiang-Yun Yang, Yao Li, Fang Liu, Xiang-Yu Cao, Zhen-Hua Jia, Shui-Shan Song
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引用次数: 21

摘要

背景:n -酰基同丝氨酸内酯(AHLs)是革兰氏阴性菌群体中协调集体行为的群体感应(QS)信号分子。最近的证据表明它们在植物生长和防御反应中起作用。结果:在本研究中,我们发现AHLs家族的一个分子n -3-氧-己醇-高丝氨酸内酯(3OC6-HSL)处理植物根系,可以增强拟南芥和小麦的耐盐性。结果表明,盐胁迫条件下,3OC6-HSL显著改善了水稻的生长抑制表型,包括根长、茎长和鲜重。生理生化分析表明,盐胁迫条件下,3OC6-HSL处理使拟南芥和小麦叶绿素和脯氨酸含量升高,MDA含量降低,Na+和Na+/K+比值降低。分子分析表明,3OC6-HSL显著上调盐胁迫条件下拟南芥中aba依赖性渗透胁迫应答基因COR15a、RD22、ADH和P5CS1、aba非依赖性基因ERD1和离子稳态调节基因SOS1、SOS2和SOS3的表达。结论:这些结果表明3OC6-HSL增强了植物耐盐性,aba依赖和aba不依赖的信号通路和SOS信号通路可能参与了3OC6-HSL诱导植物耐盐的过程。我们的数据为植物与微生物之间的相互交流提供了新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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N-3-oxo-hexanoyl-homoserine lactone, a bacterial quorum sensing signal, enhances salt tolerance in Arabidopsis and wheat.

Background: N-acyl-homoserine lactones (AHLs) are the quorum sensing (QS) signal molecules to coordinate the collective behavior in a population in Gram-negative bacteria. Recent evidences demonstrate their roles in plant growth and defense responses.

Results: In present study, we show that the treatment of plant roots with N-3-oxo-hexanoyl-homoserine lactone (3OC6-HSL), one molecule of AHLs family, resulted in enhanced salt tolerance in Arabidopsis and wheat. We found that the growth inhibition phenotype including root length, shoot length and fresh weight were significantly improved by 3OC6-HSL under salt stress condition. The physiological and biochemical analysis revealed that the contents of chlorophyll and proline were increased and the contents of MDA and Na+ and Na+/K+ ratios were decreased after 3OC6-HSL treatment in Arabidopsis and wheat under salt stress condition. Molecular analysis showed that 3OC6-HSL significantly upregulated the expression of salt-responsive genes including ABA-dependent osmotic stress responsive genes COR15a, RD22, ADH and P5CS1, ABA-independent gene ERD1, and ion-homeostasis regulation genes SOS1, SOS2 and SOS3 in Arabidopsis under salt stress condition.

Conclusions: These results indicated that 3OC6-HSL enhanced plant salt tolerance and ABA-dependent and ABA-independent signal pathways and SOS signaling might be involved in the induction of salt resistance by 3OC6-HSL in plants. Our data provide a new insight into the plant-microbe inter-communication.

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来源期刊
Botanical Studies
Botanical Studies PLANT SCIENCES-
CiteScore
4.80
自引率
2.90%
发文量
32
审稿时长
13 weeks
期刊介绍: Botanical Studies is an open access journal that encompasses all aspects of botany, including but not limited to taxonomy, morphology, development, genetics, evolution, reproduction, systematics, and biodiversity of all plant groups, algae, and fungi. The journal is affiliated with the Institute of Plant and Microbial Biology, Academia Sinica, Taiwan.
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