Biochemistry

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    Protocols in Current Issue
    Hypochlorous Acid Staining with R19-S in the Drosophila Intestine upon Ingestion of Opportunistic Bacteria
    Authors:  Salma Hachfi, Olivia Benguettat and Armel Gallet, date: 05/20/2019, view: 117, Q&A: 0
    [Abstract] The intestine is endowed with an innate immune system that is required to fight any exogenous bacteria that are swallowed along with the food. The first line of defense that is mounted by the gut epithelium is the release of immune Reactive Oxygen Species (ROS), such as hypochlorous acid (HOCl), into the lumen. HOCl is produced within 1.5 h of ...
    An Adjustable Protocol to Analyze Chemical Profiles of Non-sterile Rhizosphere Soil
    Authors:  Alex Williams, Jurriaan Ton and Pierre Pétriacq, date: 05/20/2019, view: 352, Q&A: 0
    [Abstract] The analysis of chemical diversity in non-sterile rhizosphere soil has been a pressing methodological challenge for years. Rhizosphere-enriched chemicals (i.e., rhizochemicals) include root exudation chemicals, (microbial) breakdown products thereof, and de novo produced metabolites by rhizosphere-inhabiting microbes, all of ...
    An Improved Bioassay to Study Arabidopsis Induced Systemic Resistance (ISR) Against Bacterial Pathogens and Insect Pests
    Authors:  Nicolás M. Cecchini, Yi Song, Suruchi Roychoudhry, Jean T. Greenberg and Cara H. Haney, date: 05/20/2019, view: 548, Q&A: 0
    [Abstract] The plant immune system is essential for plants to perceive and defend against bacterial, fungal and insect pests and pathogens. Induced systemic resistance (ISR) is a systemic immune response that occurs upon root colonization by beneficial microbes. A well-studied model for ISR is the association of specific beneficial strains of Pseudomonas ...
    Analysis of Indole-3-acetic Acid (IAA) Production in Klebsiella by LC-MS/MS and the Salkowski Method
    Authors:  Shraddha Gang, Sheetal Sharma, Meenu Saraf, Martin Buck and Jörg Schumacher, date: 05/05/2019, view: 310, Q&A: 0
    [Abstract] Many rhizobacteria isolated from plant rhizosphere produce various phytohormones in the form of secondary metabolites, the most common of which is Indole-3-acetic acid (IAA). Here, we detail analytical protocols of IAA detection and quantification, in vitro and in situ, as recently applied to Klebsiella SGM 81, a ...
    Optimized Oxidative Stress Protocols for Low-microliter Volumes of Mammalian Plasma
    Author:  Evan A. Langille, date: 05/05/2019, view: 322, Q&A: 0
    [Abstract] Small blood volumes commonly obtained from small mammals during field studies are only sufficient for a single biochemical assay. In this study, we used blood collected from a population of wild eastern chipmunks (Tamias striatus) and developed modified methods to improve analytical selectivity and sensitivity required for measuring ...
    Quantification of the Humidity Effect on HR by Ion Leakage Assay
    Authors:  Musoki Mwimba and Xinnian Dong, date: 04/05/2019, view: 406, Q&A: 0
    [Abstract] We describe a protocol to measure the contribution of humidity on cell death during the effector-triggered immunity (ETI), the plant immune response triggered by the recognition of pathogen effectors by plant resistance genes. This protocol quantifies tissue cell death by measuring ion leakage due to loss of membrane integrity during the ...
    Peptide Feeding and Mechanical Wounding for Tomato Seedlings
    Authors:  Lei Wang, Yan Wang and Georg Felix, date: 03/20/2019, view: 813, Q&A: 0
    [Abstract] Plants need to respond appropriately to wounding and herbivorous insects. Peptide signals have been implicated in local and systemic induction of appropriate plant defense responses. To study these peptide signals and their perception in host plants, it is important to have reproducible bioassays. Several assays, such as treatment of peptide ...
    Detection of Disulfides in Protein Extracts of Arabidopsis thaliana Using Monobromobimane (mBB)
    Authors:  Shin‐nosuke Hashida and Maki Kawai-Yamada, date: 03/05/2019, view: 641, Q&A: 0
    [Abstract] Thiol-disulfide exchange is a key posttranslational modification, determining the folding process of intra- and inter-protein structures. Thiols can be detected by colorimetric reagents, which are stoichiometrically reduced by free thiols, and by fluorescent adducts, showing fluorescence only after thioester formation. We adapted a simple ...
    Quantification of Serotonin in Rice and Insect Pest and its Functional Analysis in Insects Using Artificial Diet Feeding
    Authors:  Long Wang, Xiaohao Guo, Wenqian Huang, Haiping Lu and Qing-yao Shu, date: 02/20/2019, view: 559, Q&A: 0
    [Abstract] Rice is one of the world’s most important crops, but its production suffers from insect pests. Rice brown planthopper (BPH; Nilaparvata lugens Stål) and striped stem borer (SSB, Chilo suppressalis Walker) are the two most serious pests in rice production. We reported that serotonin is an essential mediator in the interaction ...
    I Plate-based Assay for Studying How Fungal Volatile Compounds (VCs) Affect Plant Growth and Development and the Identification of VCs via SPME-GC-MS
    Authors:  Wenzhao Wang, Ningxiao Li, Xingzhong Liu and Seogchan Kang, date: 02/20/2019, view: 896, Q&A: 0
    [Abstract] Biogenic volatile compounds (VCs) mediate various types of crucial intra- and inter-species interactions in plants, animals, and microorganisms owing to their ability to travel through air, liquid, and porous soils. To study how VCs produced by Verticillium dahliae, a soilborne fungal pathogen, affect plant growth and development, we ...



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