Microencapsulated Rhizosphere Bacteria for Promoting Growth of Corn Plants

LIU Wenjia; LIU Tianyi; ZHANG Limin; XU Chang; MO Jixian

doi:10.19303/j.issn.1008-0384.2024.03.004

Volume 39 Issue 3

Mar. 2024

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Article Navigation > Fujian Journal of Agricultural Sciences > 2024 > 39(3): 266-275

LIU W J, LIU T Y, ZHANG L M, et al. Microencapsulated Rhizosphere Bacteria for Promoting Growth of Corn Plants [J]. Fujian Journal of Agricultural Sciences，2024，39（3）：266−275 doi: 10.19303/j.issn.1008-0384.2024.03.004

Citation:

LIU W J, LIU T Y, ZHANG L M, et al. Microencapsulated Rhizosphere Bacteria for Promoting Growth of Corn Plants [J]. Fujian Journal of Agricultural Sciences，2024，39（3）：266−275 doi: 10.19303/j.issn.1008-0384.2024.03.004

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Microencapsulated Rhizosphere Bacteria for Promoting Growth of Corn Plants

doi: 10.19303/j.issn.1008-0384.2024.03.004

College of Life Science, Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang　161006, China

Received Date: 2023-12-22
Rev Recd Date: 2024-02-07

Available Online: 2024-03-28

Publish Date: 2024-03-28

Abstract

Abstract

Objective Microencapsulation was applied to improve the stability of PGPRs for promoting corn growth. Method Rhizosphere bacteria that promote corn growth were isolated. The bacteria in broth were encapsulated using sodium alginate (SA) and CaCl₂. Based on operation efficiency and PGPR survival rate, optimal conditions for the encapsulation were determined. Properties of the microencapsulated agent were analyzed for field applications with respect to the bacterial proliferation under varied artificial dehydration created by using polyethylene glycol (PEG) and salt, temperatures, pHs, and storage times as well as the growth and root morphology of the treated corn plants. Result Two PGPR strains with multiple plant growth promoting functions were isolated. The microcapsule microbial agent prepared with a mass fraction of 1% SA-3% CaCl₂ had good stability. The embedding rate of the microcapsule microbial agent reached 91.27%, the number of live bacteria reached 8.73 × 10⁹ cfu·g⁻¹, and the proliferation was 7.79 times. Significant protection against the imposed adverse conditions was observed. In comparison with the virgin PGPRs broth, the encapsulation also significantly enhanced the growth of the treated corn plants with a 91.83% increase on plant height, 81.82% on seedling dry weight, and 29.57% on root dry weight over control. In addition, the total length, surface area, diameter, volume, and tip number of the roots of the corn plants grown with the encapsulated PGPRs were significantly increased as well. Conclusion Microencapsulation significantly improved the stability as well as the root morphology and growth promoting effect of PGPRs on the corn plants.
- Corn,
- rhizosphere bacteria,
- growth-promoting effect,
- microencapsulated

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References(29)

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