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Volatiles released by endophytic Pseudomonas fluorescens promoting the growth and volatile oil accumulation in Atractylodes lancea

文献类型： 外文期刊

作者： Zhou, Jia-Yu 1 ; Li, Xia 2 ; Zheng, Jiao-Yan 1 ; Dai, Chuan-Chao 1 ;

作者机构： 1.Nanjing Normal Univ, Jiangsu Engn & Technol Res Ctr Ind Microbial Reso, Jiangsu Key Lab Microbes & Funct Genom, Coll Life Sci, Nanjing 210023, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Jiangsu High Qual Rice Res & Dev Ctr, China Natl Ctr Rice Improvement, Nanjing Branch,Inst Food Crops, Nanjing 210014, Jiangsu, Peoples R China

关键词： Atractylodes lancea;Bacterial volatiles;Endophytic bacterium;Non-contact co-culture;Plant growth promotion;Pseudomonas fluorescens;Volatile oil accumulation

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

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收录情况： SCI

摘要： Atractylodes lancea is a well-known, but endangered, Chinese medicinal plant whose volatile oils are its main active components. As the volatile oil content in cultivated A. lancea is much lower than that in the wild herb, the application of microbes or related elicitors to promote growth and volatile oil accumulation in the cultivated herb is an important area of research. This study demonstrates that the endophytic bacterium Pseudomonas fluorescens ALEB7B isolated from the geo-authentic A. lancea can release several nitrogenous volatiles, such as formamide and N,N-dimethyl-formamide, which significantly promote the growth of non-infected A. lancea. Moreover, the main bacterial volatile benzaldehyde significantly promotes volatile oil accumulation in non-infected A. lancea via activating plant defense responses. Notably, the bacterial nitrogenous volatiles cannot be detected in the A. lancea Pseudomonas fluorescens symbiont while the benzaldehyde can be detected, indicating the nitrogenous volatiles or their precursors may have been consumed by the host plant. This study firstly demonstrates that the interaction between plant and endophytic bacterium is not limited to the commonly known physical contact, extending the ecological functions of endophyte in the phytosphere and deepening the understandings about the symbiotic interaction. (C) 2016 Elsevier Masson SAS. All rights reserved.

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