Plant growth-promoting rhizobacteria affect the growth and nutrient uptake of Fraxinus americana container seedlings

Abstract

Plant growth-promoting rhizobacteria (PGPR) are important catalysts that regulate the functional properties of agricultural systems. However, there is little information on the effect of PGPR inoculation on the growth and nutrient accumulation of forest container seedlings. This study determined the effects of a growth medium inoculated with PGPR on the nutrient uptake, nutrient accumulation, and growth of Fraxinus americana container seedlings. PGPR inoculation with fertilizer increased the dry matter accumulation of the F. americana aerial parts with delayed seedling emergence time. Under fertilized conditions, the accumulation time of phosphorous (P) and potassium (K) in the F. americana aerial parts was 13 days longer due to PGPR inoculation. PGPR increased the maximum daily P and K accumulations in fertilized seedlings by 9.31 and 10.44 %, respectively, but had little impact on unfertilized ones. Regardless of fertilizer application, the root exudates, namely sugars, amino acids, and organic acids significantly increased because of PGPR inoculation. PGPR inoculation with fertilizer increased the root, shoot, and leaf yields by 19.65, 22.94, and 19.44 %, respectively, as well as the P and K contents by 8.33 and 10.60 %, respectively. Consequently, the N, P, and K uptakes increased by 19.85, 31.97, and 33.95 %, respectively. Hence, PGPR inoculation with fertilizer can be used as a bioenhancer for plant growth and nutrient uptake in forest container seedling nurseries.

Induction of systemic resistance in Chinese cabbage against black rot by plant growth-promoting rhizobacteria

“…The use of plant growth-promoting rhizobacteria (PGPR) as biopesticides is reported to be an effective way to reduce the use of agrichemicals (Banerjee et al, 2005). PGPR are beneficial bacteria that influence the growth (Khalid et al, 2004), yield (Mia et al, 2010), and nutrient uptake of the plant (Liu et al, 2013). Some PGPR strains also provide biological control of plant disease (Chithrashree et al, 2011;Beneduzi et al, 2012).…”

Inoculation with Bacillus licheniformis MH48 to improve Camellia japonicaseedling development in coastal lands

“…The growth and nutrient uptake of C. japonica seedlings was higher after treatment with B. licheniformis MH48 inoculate compared with that of the other two treatments tested (chemical fertilizer and control) ( Table 2). B. licheniformis MH48 can produce auxin (Figure 3), and auxin can stimulate the formation of lateral roots and absorbent root hairs (Liu et al, 2013), resulting in better uptake of nutrients from the soil and better plant growth (Suzuki et al, 2003;Orhan et al, 2006;Aslantaş et al, 2007;Liu et al, 2013). In addition, the bacterial inoculate contains ACC deaminase, which is the immediate precursor of the phytohormone ethylene, thereby inhibiting ethylene levels and reducing salt stress in C. japonica seedlings (Glick et al, 1998;Patten and Glick, 2002;Çakmakçı, 2016).…”

Morphoanatomy and Chlorophyll of Lettuce Plants Induced by Rhizobacteria

“…In this work pseudomonas influenced positively these characteristics, mainly by its commercialization, thus, all the variables influenced by P. fluorescens in the present study, contributed to a higher biomass of lettuce seedlings, this effect is attributed to the several modes of action of rhizobacteria previously described, from greater root development, greater nutrient uptake and translocation to the development of aerial part of lettuce plants. The increase in biomass by Pseudomonas has already been described and attributed, yet the production of hormones (Liu et al, 2013).…”