Contribution of Gluconacetobacter diazotrophicus to phosphorus nutrition in strawberry plants

Abstract

Background and Aims Gluconacetobacter diazotrophicus (family Acetobacteraceae), is a N 2 -fixing bacterium with capability of mineral solubilization through organic acid production. The aim of this work was to evaluate its capacity as a phosphate solubilizing bacterium to overcome a phosphorus deficiency in phosphorus-starved strawberry plants. Methods Strawberry plants growing with available and not available phosphorus were inoculated with the wild type G. diazotrophicus PAL5 Pi-solubilizing strain and a Tn5-derivative mutant defective in organic acid production. Growth index, root acidification, root area, MPN, greenness index, and phosphorus content were evaluated. ResultsResults demonstrate that G. diazotrophicus PAL5 can increase the phosphorus content of strawberry plants (root and shoot), and revert phosphorus deficiency. Additionally, bacterial plant growth-promoting effect was represented by higher values of biomass production, root area, and growth index, as compared with the controls. Conclusions G. diazotrophicus can increase the phosphorus content of strawberry plants, promoting the overall plant growth.

Soil Microbial Resources for Improving Fertilizers Efficiency in an Integrated Plant Nutrient Management System

“…This important P uptake would have relied upon plant-induced changes, especially root growth whose nutrient absorptive capacity could be augmented owing to associated non-symbiotic NF bacteria (such as Pseudomonas , Azospirillum , Azotobacter , Sinorhizobium , Bacillus , and Glucanobacter , etc.) with multifunctional abilities other than only improving both N and P nutrition ( Panwar and Singh, 2000 ; Kumar and Singh, 2001 ; López-Ortega et al, 2013 ; Delaporte-Quintana et al, 2017 ). Furthermore, the observed root P uptake improvement (Az 1 , Figure 3 ) correlated with a specific plant P translocation pattern (higher intracellular P in shoots as compared to that in roots) and the higher ability of the latter strain to solubilize tri-calcium P. Organic acids, among other factors, may enable roots to access readily available P owing to intense acidification at the root vicinity such as in wheat and tomato seedlings supplied with insoluble calcium phosphate and inoculated with a NF bacterium ( Gluconacetobacter diazotrophicus ; Sevilla and Kennedy, 2000 ; Crespo et al, 2011 ; Delaporte-Quintana et al, 2017 ).…”

“…with multifunctional abilities other than only improving both N and P nutrition ( Panwar and Singh, 2000 ; Kumar and Singh, 2001 ; López-Ortega et al, 2013 ; Delaporte-Quintana et al, 2017 ). Furthermore, the observed root P uptake improvement (Az 1 , Figure 3 ) correlated with a specific plant P translocation pattern (higher intracellular P in shoots as compared to that in roots) and the higher ability of the latter strain to solubilize tri-calcium P. Organic acids, among other factors, may enable roots to access readily available P owing to intense acidification at the root vicinity such as in wheat and tomato seedlings supplied with insoluble calcium phosphate and inoculated with a NF bacterium ( Gluconacetobacter diazotrophicus ; Sevilla and Kennedy, 2000 ; Crespo et al, 2011 ; Delaporte-Quintana et al, 2017 ). Moreover, Species belonging to several bacterial genera such as Azosporillum , Azotobacter , Rhizobium , and Klebsiella were reported to exhibit a higher ability to solubilize tri-calcium P ( López-Ortega et al, 2013 ).…”

Azospirillum inoculation of 'Marandu' palisade grass seeds: effects on forage production and nutritional status

“…Plant-growth-promoting bacteria increase root growth, favoring the uptake of water and nutrients (El Zemrany et al, 2007;Huang et al, 2017;Shaharoona, Jamro, Zahir, Arshad, & Memon, 2007). Several mechanisms are usually involved, especially phytohormone production, including auxins, gibberellins, cytokinins, and ethylene, as well as P solubilization and biological nitrogen fixation, which may result in increased plant growth and tolerance to stresses like drought, salinity, and metal toxicity (Bashan & de-Bashan, 2005;Delaporte-Quintana et al, 2017).…”

A Biomimética Como Inspiração Para Fachadas Brasileiras Dinâmicas E Eficientes

“…Para o morangueiro, os promotores de crescimento vegetal destacamse enquanto uma alternativa sustentável, podendo melhorar o desenvolvimento, produção e qualidade de frutos, maximizando a rentabilidade da cultura(Abhilash et al. 2016;Delaporte-Quintana et al 2017).Diversos microrganismos são reconhecidos por estimularem o desenvolvimento vegetal. Estirpes de Bacillus amyloliquefaciens realizam a colonização radicular, produção de compostos voláteis e aumento na eficiência no uso do nitrogênio (N) no solo pelas raízes da planta hospedeira(Wu et al 2017;Mendis et al 2018).…”