Next Article in Journal
Resilient Governance of Water Regimes in Variable Climates: Lessons from California’s Hydro-Ecological Zones
Next Article in Special Issue
Sequencing Infrastructure Investments under Deep Uncertainty Using Real Options Analysis
Previous Article in Journal
The Curve Number Concept as a Driver for Delineating Hydrological Response Units
Previous Article in Special Issue
Effect of Saturated Zone on Nitrogen Removal Processes in Stormwater Bioretention Systems
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Water 2018, 10(2), 195; https://doi.org/10.3390/w10020195

Phosphorus Solubilizing and Releasing Bacteria Screening from the Rhizosphere in a Natural Wetland

1
Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
2
Department of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China
*
Author to whom correspondence should be addressed.
Received: 24 December 2017 / Revised: 29 January 2018 / Accepted: 30 January 2018 / Published: 12 February 2018
(This article belongs to the Special Issue Sponge Cities: Emerging Approaches, Challenges and Opportunities)
Full-Text   |   PDF [2902 KB, uploaded 12 February 2018]   |  

Abstract

Inorganic phosphorus (P)-solubilizing bacteria (IPSB) and organic P-mineralizing bacteria (OPMB) were isolated from bacteria that were first extracted from the rhizosphere soil of a natural wetland and then grown on either tricalcium phosphate or lecithin medium. The solubilizing of inorganic P was the major contribution to P availability, since the isolated bacteria released much more available P from inorganic tricalcium phosphate than lecithin. IPSB No. 5 had the highest P release rate, that is, 0.53 mg·L−1·h−1 in 96 h, and R10′s release rate was 0.52 mg·L−1·h−1 in 10 days. The bacteria were identified as Pseudomonas sp. and Pseudomonas knackmussii, respectively. R10 released as much as 125.88 mg·L−1 dissolved P from tricalcium phosphate medium, while R4 released the most dissolved P from organic P medium among the isolates, with a concentration of 1.88 mg·L−1 and a releasing rate of 0.0078 mg·L−1·h−1 in ten days. P releasing increased with a pH decrease only when it was from inorganic P, not organic lecithin, and there was no significant correlation between the culture pH and P solubilizing. High-throughput sequencing analysis revealed that the dominant phylum in the studied wetland rhizosphere consisted of Acidobacteria, Proteobacteria, Bacteroidetes and Chloroflexi, accounting for 34.9%, 34.2%, 8.8% and 4.8%, respectively. View Full-Text
Keywords: wetland; rhizosphere bacteria; available phosphorus; pH wetland; rhizosphere bacteria; available phosphorus; pH
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed
Printed Edition Available!
A printed edition of this Special Issue is available here.

Share & Cite This Article

MDPI and ACS Style

Cao, Y.; Fu, D.; Liu, T.; Guo, G.; Hu, Z. Phosphorus Solubilizing and Releasing Bacteria Screening from the Rhizosphere in a Natural Wetland. Water 2018, 10, 195.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top