| Title: | Volatile compounds emitted by diverse phytopathogenic microorganisms promote plant growth and flowering through cytokinin action |
| Author(s): | Sanchez-Lopez AM; Baslam M; De Diego N; Munoz FJ; Bahaji A; Almagro G; Ricarte-Bermejo A; Garcia-Gomez P; Li J; Humplik JF; Novak O; Spichal L; Dolezal K; Baroja-Fernandez E; Pozueta-Romero J; |
| Address: | "Instituto de Agrobiotecnologia (CSIC/UPNA/Gobierno de Navarra), Irunako etorbidea 123, 31192, Mutiloabeti, Nafarroa, Spain. Department of Chemical Biology and Genetics, Centre of the Region Hana for Biotechnological and Agricultural Research, Faculty of Science, Palacky University, Olomouc, CZ-78371, Czech Republic. College of Agronomy and Plant Protection, Qingdao Agricultural University, 266109, Qingdao, China. Laboratory of Growth Regulators, Centre of the Region Hana for Biotechnological and Agricultural Research, Faculty of Science, Palacky University and Institute of Experimental Botany ASCR, Olomouc, CZ-78371, Czech Republic" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Linking) |
| Abstract: | "It is known that volatile emissions from some beneficial rhizosphere microorganisms promote plant growth. Here we show that volatile compounds (VCs) emitted by phylogenetically diverse rhizosphere and non-rhizhosphere bacteria and fungi (including plant pathogens and microbes that do not normally interact mutualistically with plants) promote growth and flowering of various plant species, including crops. In Arabidopsis plants exposed to VCs emitted by the phytopathogen Alternaria alternata, changes included enhancement of photosynthesis and accumulation of high levels of cytokinins (CKs) and sugars. Evidence obtained using transgenic Arabidopsis plants with altered CK status show that CKs play essential roles in this phenomenon, because growth and flowering responses to the VCs were reduced in mutants with CK-deficiency (35S:AtCKX1) or low receptor sensitivity (ahk2/3). Further, we demonstrate that the plant responses to fungal VCs are light-dependent. Transcriptomic analyses of Arabidopsis leaves exposed to A. alternata VCs revealed changes in the expression of light- and CK-responsive genes involved in photosynthesis, growth and flowering. Notably, many genes differentially expressed in plants treated with fungal VCs were also differentially expressed in plants exposed to VCs emitted by the plant growth promoting rhizobacterium Bacillus subtilis GB03, suggesting that plants react to microbial VCs through highly conserved regulatory mechanisms" |
| Keywords: | "Alternaria/physiology Arabidopsis/microbiology/physiology Cytokinins/*physiology Flowers/*growth & development/physiology Gene Expression Regulation, Plant/physiology Photosynthesis/physiology Plant Development/*physiology Plants/*microbiology Real-Time P;" |
| Notes: | "MedlineSanchez-Lopez, Angela Maria Baslam, Marouane De Diego, Nuria Munoz, Francisco Jose Bahaji, Abdellatif Almagro, Goizeder Ricarte-Bermejo, Adriana Garcia-Gomez, Pablo Li, Jun Humplik, Jan F Novak, Ondrej Spichal, Lukas Dolezal, Karel Baroja-Fernandez, Edurne Pozueta-Romero, Javier eng Research Support, Non-U.S. Gov't 2016/04/20 Plant Cell Environ. 2016 Dec; 39(12):2592-2608. doi: 10.1111/pce.12759. Epub 2016 Jun 16" |
