International Journal of Environmental Chemistry

Pitaya Cactus Endophytic Bacteria a Sustainable Option to Reduce and Optimize NH4NO3 in Phaseolus vulgaris

  1. Juan Manuel Sánchez Yáñez
  2. Juan Luis Ignacio-De la Cruz
  3. Guidier Marto-Domínguez
  4. Ramiro Eleazar Ruiz-Nájera

Abstract

The Phaseolus vulgaris crop demands nitrogen fertilizer as NH4NO3 for healthy growth. However, the application of NH4NO3 not uptaken by plant roots, generates N2O, a gas that contributes to the greenhouse effect besides loss of soil fertility; a sustainable option is to reduce up to 50% and to optimize it by inoculating P. vulgaris seeds with genera and species of plant growth promoting endophytic bacteria isolated from a desert xerophyte such as Stenocereus queretaroensis tolerant to water stress and NH4NO3 dependent nutritional stress. The aims of this research were: a) to isolate Burholderia vietnamiensis and Gluconoacetobacter diazotrophicus endophytic in root of S. queretaroensis; and b) the analysis of growth of P. vulgaris with B. vietnamiensis and G. diazotrophicus. P. vulgaris seeds were infected with B. vietnamiensis and G. diazotrophicus at 50% NH4NO3 in a greenhouse trial. After that, response variables in were determined P. vulgaris: germination, phenology and biomass to seedling and flowering; these numerical data were analyzed by ANOVA and Tukey (P<0.05%). The results showed a positive response of P. vulgaris to B.vietnamiensis and G. diazotrophicus at 50% NH4NO3 in seed germination; on the phenology/biomassat seedling and flowering stages, in P. vulgaris detected 1.97 g of airborne dry weight (ADW) and 1.88 g of root dry weight (RDW), statistically different compared to 1.14 g ADW and 0.69 g RDW in P. vulgaris uninoculated with B. vietnamiensis and G. diazotrophicus, fed at 100% NH4NO3 or (relative control). These findings revealed that B. vietnamiensis and G. diazotrophicus endophytes of S. queretaroensis colonized the interior of the root system of P. vulgaris; there they converted root metabolites into phytohormones that optimized uptake of NH4NO3 at 50% without leaving any concentration of nitrogen fertilizer free, which avoids the emission of greenhouse gases andconsequently global warming.

Read more of it

Subscribe to one journal or build your own list of several. One invoice, one payment, access for a full year.

Subscribe to journals →

Publish your article

Peer-reviewed journals across every subject, with open access options. Send your manuscript to the right editor today.

Publish with us → Calculate your APC