Abstract
Guava (Psidium guajava L.), is adapted to tropical and subtropical climates, and, in addition to its nutritional value, has great medicinal potential. One of the medicinal effects is antibacterial, and this can be identified from the phytochemicals present in its various parts, especially the leaf, which contains flavonoids, phenols, and tannins, as well as phytocomposites with antibacterial action. Therefore, the interaction of this plant with arbuscular mycorrhizal fungi and Meloidogyne enterolobii is a biotechnological resource that can increase the production of secondary metabolites so that the guava ethanolic extract is effective against multidrug-resistant bacterial strains. Therefore, the objective of this study was to test the inhibitory action of mycorrhizal guava leaf extract and Meloidogyne enterolobii on strains of Klebsiella pneumoniae carbapenemase. Guava seedlings from cuttings were inoculated with Acaulospora longula, and later with Meloidogyne enterolobii; the leaves were harvested at two maturation times of the plant and placed in an oven. Next, a leaf extract was prepared using ethanol as a solvent. The extract was tested in multidrug-resistant strains of K. pneumoniae carbapenemase from operative wounds using disc diffusion methodology. The plant-AMF-phytonematode interaction positively potentialize the inhibitory action of guava leaf ethanolic extract on multidrug-resistant bacterial strains.
Highlights
The human-nature interaction, with the flora, has contributed to human evolutionary success
The design was completely randomized, consisting of eight treatments related to the presence or absence of arbuscular mycorrhizal fungi (AMF) species Acaulospora longula, presence or absence of Meloidogyne enterolobii, in 15 or 45 days of inoculation of M. enterolobii
There was a reduction in the number of galls and egg masses of M. enterolobii (Figure 1) in the treatment using A. longula
Summary
The human-nature interaction, with the flora, has contributed to human evolutionary success. It is conjectured that foraging for food plants contributed to the survival of the first hominids. The medicinal effects of the plants (Ferreira Júnior & Albuquerque 2018) could treat certain conditions presented by the organisms that consumed them. Guava (Psidium guajava L.), native to Central and Latin America, thrives in a tropical and subtropical climate and can adapt to different soil types, except for poorly drained and clayey soils (Barbosa & Lima 2010). It belongs to the Myrtaceae family, which, in addition to its food potential, has medicinal properties. It belongs to the Myrtaceae family, which, in addition to its food potential, has medicinal properties. Albuquerque et al (2007) and Agra et al (2008), in research on the traditional uses attributed to medicinal plants in Northeast Brazil, showed that guava is used to treat stomach pain, dysentery, digestive problems, headache, inflammation in general, gingivitis, and throat disorders; the roots, leaves, and flowers are the parts of the plants used for medicinal purposes
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