| Title: | Bacteria-derived diacetyl enhances Arabidopsis phosphate starvation responses partially through the DELLA-dependent gibberellin signaling pathway |
| Author(s): | Morcillo RJL; Singh SK; He D; Vilchez JI; Kaushal R; Wang W; Huang W; Pare PW; Zhang H; |
| Address: | "PSC, Shanghai Center for Plant Stress Biology, and CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China. Institute for Water Research and Department of Microbiology, University of Granada, Granada, Spain. University of Chinese Academy of Sciences, Beijing, China. Research Centre, Shanghai Chenshan Botanical Garden, Shanghai, China. Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, TX, USA" |
| DOI: | 10.1080/15592324.2020.1740872 |
| ISSN/ISBN: | 1559-2324 (Electronic) 1559-2316 (Print) 1559-2316 (Linking) |
| Abstract: | "Plant growth-promoting rhizobacteria (PGPR) are naturally occurring soil microorganisms that colonize roots and stimulate plant growth. Some PGPR strains can directly regulate plant growth in the absence of physical contact with the plant, via volatile organic compounds (VOCs) emissions. Recently, we have described that Arabidopsis thaliana respond differentially to diacetyl, a VOC from Bacillus amyloliquefaciens strain GB03 (GB03), through integral modulation of the immune system and the phosphate-starvation response (PSR) system, resulting in either mutualism or immunity. Under phosphate deficient conditions, diacetyl enhances salicylic acid- and jasmonic acid-mediated immunity and consequently causes plant hyper-sensitivity to phosphate deficiency. Here, we show that application of exogenous gibberellin (GA) partially alleviates the deleterious effect caused by either B. amyloliquefaciens GB03 VOCs or diacetyl in Arabidopsis under phosphate deficient conditions, while DELLA quadruple mutant exposed to GB03 VOCs exhibits a partial reduction on the stress symptoms. Moreover, diacetyl appears to enhance DELLA protein accumulation and increase the expression of several GA deactivation-related genes. These findings suggest that the DELLA-mediated GA signaling pathway is involved in the bi-faceted role of GB03 VOCs in regulating plant growth" |
| Keywords: | "Arabidopsis/drug effects/*metabolism Arabidopsis Proteins/genetics/*metabolism Bacillus amyloliquefaciens/*metabolism Diacetyl/*pharmacology Gene Expression Regulation, Plant/drug effects Gibberellins/*metabolism Phosphates/*deficiency/metabolism Seedling;" |
| Notes: | "MedlineMorcillo, Rafael J L Singh, Sunil K He, Danxia Vilchez, Juan I Kaushal, Richa Wang, Wei Huang, Weichang Pare, Paul W Zhang, Huiming eng Research Support, Non-U.S. Gov't 2020/03/19 Plant Signal Behav. 2020 Apr 2; 15(4):1740872. doi: 10.1080/15592324.2020.1740872. Epub 2020 Mar 17" |
