Screening of indigenous phosphate⁃solubilizing bacteria from Liquidambar formosana Hance rhizosphere and its potential applications for improving plant growth

SONG Juan, XU Guofang, ZHAO Xing, YAO Yao, YANG Xuexiang, TANG Ronglin, CUI Jiawang, CHEN Fengmao, REN Jiahong

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (3) : 95-104.

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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (3) : 95-104. DOI: 10.3969/j.issn.1000-2006.201908022

Screening of indigenous phosphate⁃solubilizing bacteria from Liquidambar formosana Hance rhizosphere and its potential applications for improving plant growth

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Abstract

Objective

Isolate and identify efficient phosphate solubilizing bacteria(PSB) from Liquidambar formosana Hance rhizosphere soil and investigate the application in phosphorus release.

Method

the PSB strains were graded based on morphological and physiological-biochemical characteristics, microbial identification system (MIDI), BIOLOG analysis and 16S rRNA identification methods. The effect of these PSB strains (JX7,JX18,JX21 and WH10)on plant growth was evaluated by determining the minor and major mineral contents of L. formosana leaves using inductively-coupled plasma atomic emission spectrometry.

Result

Isolates JX7, JX18, WH10 and JX21 were closely related to Variovorax paradoxus, Bacillus cereus, B. mycoides and B.cereus, respectively. The JX21 showed the highest content of soluble phosphate was (9.35 ± 0.89) mg/L, followed by JX7 [(6.63±0.09) mg/L], WH10[ (6.16 ± 0.12 ) mg/L] and JX18 [(5.32 ± 0.07 ) mg/L], all the maximum phosphate was fermented after 72 h of incubation. Phosphate-solubilizing bacteria (JX7, WH10, JX18 and JX21) selected from L. formosana rhizosphere showed a significantly improvement in shoot height and ground diameter of L. formosana (P < 0.05). As well as, these selected strains promoted L. formosana in taking up mineral elements such as phosphorus, magnesium, calcium and zinc under greenhouse conditions.

Conclusion

The isolates showed good phosphate-solubilizing activity and had potential for use as biofertilizer agents. Further study is needed to evaluate beneficial traits to develop commercial applications.

Key words

Liquidambar formosana Hance / plant growth promoting bacteria / plant nutrients / phosphate-solubilizing bacteria / biofertilizer

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SONG Juan, XU Guofang, ZHAO Xing, YAO Yao, YANG Xuexiang, TANG Ronglin, CUI Jiawang, CHEN Fengmao, REN Jiahong. Screening of indigenous phosphate⁃solubilizing bacteria from Liquidambar formosana Hance rhizosphere and its potential applications for improving plant growth[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2020, 44(3): 95-104 https://doi.org/10.3969/j.issn.1000-2006.201908022

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