Microbial modulation of bacoside A biosynthetic pathway and systemic defense mechanism in Bacopa monnieri under Meloidogyne incognita stress View Full Text


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Article Info

DATE

2017-02-03

AUTHORS

Rupali Gupta, Akanksha Singh, Madhumita Srivastava, Vivek Singh, M. M. Gupta, Rakesh Pandey

ABSTRACT

Plant-associated beneficial microbes have been explored to fulfill the imperative function for plant health. However, their impact on the host secondary metabolite production and nematode disease management remains elusive. Our present work has shown that chitinolytic microbes viz., Chitiniphilus sp. MTN22 and Streptomyces sp. MTN14 singly as well as in combination modulated the biosynthetic pathway of bacoside A and systemic defense mechanism against Meloidogyne incognita in Bacopa monnieri. Interestingly, expression of bacoside biosynthetic pathway genes (3-Hydroxy-3-methylglutaryl coenzyme A reductase, mevalonate diphosphate decarboxylase, and squalene synthase) were upregulated in plants treated with the microbial combination in the presence as well as in absence of M. incognita stress. These microbes not only augmented bacoside A production (1.5 fold) but also strengthened host resistance via enhancement in chlorophyll a, defense enzymes and phenolic compounds like gallic acid, syringic acid, ferulic acid and cinnamic acid. Furthermore, elevated lignification and callose deposition in the microbial combination treated plants corroborate well with the above findings. Overall, the results provide novel insights into the underlying mechanisms of priming by beneficial microbes and underscore their capacity to trigger bacoside A production in B. monnieri under biotic stress. More... »

PAGES

41867

References to SciGraph publications

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  • 2014-05-20. Exploitation of microbes for enhancing bacoside content and reduction of Meloidogyne incognita infestation in Bacopa monnieri L in PROTOPLASMA
  • 2007-04-12. Estimation of total phenolic content and other oxidation substrates in plant tissues using Folin–Ciocalteu reagent in NATURE PROTOCOLS
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  • 2016-05-14. Rhizophagus intraradices or its associated bacteria affect gene expression of key enzymes involved in the rosmarinic acid biosynthetic pathway of basil in MYCORRHIZA
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  • 2013-08-29. Chitinolytic Microorganisms and Their Possible Application in Environmental Protection in CURRENT MICROBIOLOGY
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/srep41867

    DOI

    http://dx.doi.org/10.1038/srep41867

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1083525978

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/28157221


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