The inoculation of P. alata seedlings with Gigaspora albida is an alternative to maximize the production of pharmacologically important foliar biomolecules, especially flavonoids, with benefits that vary in accordance with the fertility of the soil.

No abstract

Ingazeira (Inga vera Willd.), a plant native to Brazil is commonly used by Brazilians for its medicinal properties and the value of its wood. Various plants with therapeutic properties and economic importance benefit from mycorrhizal inoculation, which produces larger quantities of therapeutic compounds. However, the effects of mycorrhizal inoculation on ingazeira have not yet been studied. The objective of this paper is to evaluate the effectiveness of arbuscular mycorrhizal fungi (AMF) on the growth of seedlings and production of primary and secondary metabolites, and to determine the total foliar antioxidant activity in ingazeira seedlings. Soilinoculum was applied to the root region of ingazeira plantlets, which were transplanted into sacs containing 1.2 kg of soil and 10 %

In the Northeast of Brazil, expansion of guava crops has been impaired by Meloidogyne enterolobii that causes root galls, leaf fall and plant death. Considering the fact that arbuscular mycorrhizal Fungi (AMF) improve plant growth giving protection against damages by plant pathogens, this work was carried out to select AMF efficient to increase production of guava seedlings and their tolerance to M. enterolobii. Seedlings of guava were inoculated with 200 spores of Gigaspora albida, Glomus etunicatum or Acaulospora longula and 55 days later with 4,000 eggs of M. enterolobii. The interactions between the AMF and M. enterolobii were assessed by measuring leaf number, aerial dry biomass, CO2 evolution and arbuscular and total mycorrhizal colonization. In general, plant growth was improved by the treatments with A. longula or with G. albida. The presence of the nematode decreased arbuscular colonization and increased general enzymatic activity. Higher dehydrogenase activity occurred with the A. longula treatment and CO2 evolution was higher in the control with the nematode. More spores and higher production of glomalin-related soil proteins were observed in the treatment with G. albida. The numbers of galls, egg masses and eggs were reduced in the presence of A. longula. Inoculation with this fungus benefitted plant growth and decreased nematode reproduction.

No abstract