| Title: | Belowground fungal volatiles perception in okra (Abelmoschus esculentus) facilitates plant growth under biotic stress |
| Author(s): | Singh J; Singh P; Vaishnav A; Ray S; Rajput RS; Singh SM; Singh HB; |
| Address: | "Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India; Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, 221005, India. Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, 221005, India. Department of Biotechnology, Institute of Applied Sciences & Humanities, GLA University, Mathura, 281406, India. Electronic address: anukoolv7@gmail.com. Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India. Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, 221005, India; Department of Biotechnology, Institute of Applied Sciences & Humanities, GLA University, Mathura, 281406, India; Somvanshi Research Foundation, 13/21, Vikas Nagar, Lucknow, 226022, India. Electronic address: hbs1@rediffmail.com" |
| DOI: | 10.1016/j.micres.2021.126721 |
| ISSN/ISBN: | 1618-0623 (Electronic) 0944-5013 (Linking) |
| Abstract: | "Microbial volatile organic compounds (mVOCs) have great potential in plant ecophysiology, yet the role of belowground VOCs in plant stress management remains largely obscure. Analysis of biocontrol producing VOCs into the soil allow detailed insight into their interaction with soil borne pathogens for plant disease management. A root interaction trial was set up to evaluate the effects of VOCs released from Trichoderma viride BHU-V2 on soil-inhabiting fungal pathogen and okra plant growth. VOCs released into soil by T. viride BHU-V2 inhibited the growth of collar rot pathogen, Sclerotium rolfsii. Okra plants responded to VOCs by increasing the root growth (lateral roots) and total biomass content. VOCs exposure increased defense mechanism in okra plants by inducing different enzyme activities i.e. chitinase (0.89 fold), beta-1,3-glucanase (0.42 fold), peroxidase (0.29 fold), polyphenol oxidase (0.33 fold) and phenylalanine lyase (0.7 fold) when inoculated with S. rolfsii. In addition, T. viride BHU-V2 secreted VOCs reduced lipid peroxidation and cell death in okra plants under pathogen inoculated condition. GC/MS analysis of VOCs blend revealed that T. viride BHU-V2 produced more number of antifungal compounds in soil medium as compared to standard medium. Based on the above observations it is concluded that okra plant roots perceive VOCs secreted by T. viride BHU-V2 into soil that involved in induction of plant defense system against S. rolfsii. In an ecological context, the findings reveal that belowground microbial VOCs may play an important role in stress signaling mechanism to interact with plants" |
| Keywords: | Abelmoschus/*drug effects/enzymology/*growth & development Basidiomycota/*drug effects Biological Control Agents/pharmacology Cell Death/drug effects Hypocreales/*chemistry/isolation & purification Lipid Peroxidation/drug effects Plant Development/drug ef; |
| Notes: | "MedlineSingh, Jyoti Singh, Prachi Vaishnav, Anukool Ray, Shatrupa Rajput, Rahul Singh Singh, Shiv Mohan Singh, Harikesh Bahadur eng Germany 2021/02/14 Microbiol Res. 2021 May; 246:126721. doi: 10.1016/j.micres.2021.126721. Epub 2021 Feb 5" |
