Isolation of efficient phosphate solubilizing bacteria capable of enhancing tomato plant growth

Abstract

Phosphorus is one of the three macronutrients that are essential for plant growth and development. Inorganic phosphorus (P), which can make up to 70% of the total P content in soils, can exist in calcium-, aluminum-, or iron-complexed forms that are unavailable for plant use. As a result, mineral phosphorus, P 2 O 5 , is often used as a fertilizer to supplement the nutrient for crop growth. To reduce the addition of mineral phosphorus to agricultural soils, research in naturally occurring phosphate-solubilizing microorganisms has been conducted for decades. This study found bacteria that solubilized phosphate at very high rates. The most efficient of the bacteria presented in this paper, Pantoea sp. Pot1, can solubilize tricalcium phosphate (Ca 3 (PO 4 ) 2 ) at a rate of 956 mg L -1 . This bacteria produces a variety of organic acids, including acetic, gluconic, formic, and propionic acids. Greenhouse experiments demonstrated that tomato plants with soil systems inoculated with Pantoea sp. Pot1 incorporated more P and produced much higher biomass weights than those plants without any added bacteria.

Rhizospheric bacterial isolates of grass pea (Lathyrus sativusL.) endowed with multiple plant growth promoting traits

“…Micro‐organisms including Serratia , Enterobacter (Malleswari and Bagyanarayana ), Kluyvera (Hariprasad and Niranjana ) and Pantoea species (Sharon et al . ) were previously reported as phosphate solubilizers, consistent with this study.…”

“…The difference could be due to differences in the makeup of the rhizospheric communities among various plant species. Micro-organisms including Serratia, Enterobacter (Malleswari and Bagyanarayana 2013), Kluyvera (Hariprasad and Niranjana 2009) and Pantoea species (Sharon et al 2016) were previously reported as phosphate solubilizers, consistent with this study.…”

“…and Enterobacter sp. isolated from potato rhizosphere produced 956 and 429 mg l À1 available phosphorus with a final pH of 4Á5 and 5Á5, respectively, whereas Enterobacter cloacae strain 34977 isolated from tomato rhizosphere produced 356 mg l À1 available phosphorus with a drop in pH from an initial 7Á0-5Á0 (Sharon et al 2016). The difference could be due to differences in the makeup of the rhizospheric communities among various plant species.…”

Skin Cutibacterium acnes Mediates Fermentation to Suppress the Calcium Phosphate-Induced Itching: A Butyric Acid Derivative with Potential for Uremic Pruritus

“…This resulted in the formation of clear zones on the agar plate with the addition of acetic acid or propionic acid, but not butyric acid ( Figure 1D). These results suggest that CaP can be degraded by acetic acid and propionic acid in the media of glucose fermentation of C. acnes [52][53][54].…”

“…This resulted in the formation of clear zones on the agar plate with the addition of acetic acid or propionic acid, but not butyric acid ( Figure 1D). These results suggest that CaP can be degraded by acetic acid and propionic acid in the media of glucose fermentation of C. acnes [52][53][54]. The CaP deposits and increased level of IL-6 in skin and blood are the major manifestations observed in CKD patients undergoing dialysis [42,55,56].…”