Humic Acid-Amended Formulation Improves Shelf-Life of Plant Growth-Promoting Rhizobacteria (PGPR) Under Laboratory Conditions
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Published:2023-03-31
Issue:3
Volume:31
Page:1137-1155
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ISSN:2231-8526
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Container-title:Pertanika Journal of Science and Technology
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language:en
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Short-container-title:JST
Author:
Sadeq Buraq Musa,Tan Kee Zuan Ali,Kasim Susilawati,Mui Yun Wong,Othman Nur Maizatul Idayu,Alkooranee Jawadyn Talib,Chompa Sayma Serine,Akter Amaily,Rahman Md Ekhlasur
Abstract
Plant growth-promoting rhizobacteria (PGPR) is a soil bacterium that positively impacts soil and crops. These microbes invade plant roots, promote plant growth, and improve crop yield production. Bacillus subtilis is a type of PGPR with a short shelf-life due to its structural and cellular components, with a non-producing resistance structure (spores). Therefore, optimum formulations must be developed to prolong the bacterial shelf-life by adding humic acid (HA) as an amendment that could benefit the microbes by providing shelter and carbon sources for bacteria. Thus, a study was undertaken to develop a biofertilizer formulation from locally isolated PGPR, using HA as an amendment. Four doses of HA (0, 0.01, 0.05, and 0.1%) were added to tryptic soy broth (TSB) media and inoculated with B. subtilis (UPMB10), Bacillus tequilensis (UPMRB9) and the combination of both strains. The shelf-life was recorded, and viable cells count and optical density were used to determine the bacterial population and growth trend at monthly intervals and endospores detection using the malachite green staining method. After 12 months of incubation, TSB amended with 0.1% HA recorded the highest bacterial population significantly with inoculation of UPMRB9, followed by mixed strains and UPMB10 at 1.8x107 CFUmL-1, 2.8x107 CFUmL-1and 8.9x106 CFUmL-1, respectively. Results showed that a higher concentration of HA has successfully prolonged the bacterial shelf-life with minimal cell loss. Thus, this study has shown that the optimum concentration of humic acid can extend the bacterial shelf-life and improve the quality of a biofertilizer.
Publisher
Universiti Putra Malaysia
Subject
General Earth and Planetary Sciences,General Environmental Science
Reference63 articles.
1. Al Hamad, B. M., Al Raish, S. M., Ramadan, G. A., Saeed, E. E., Alameri, S. S., Al Senaani, S. S., AbuQamar, S. F., & El-Tarabily, K. A. (2021). Effectiveness of augmentative biological control of Streptomyces griseorubens UAE2 depends on 1-aminocyclopropane-1-carboxylic acid deaminase activity against Neoscytalidium dimidiatum. Journal of Fungi, 7(11), Article 885. https://doi.org/10.3390/jof7110885 2. Al Raish, S. M., Saeed, E. E., Alyafei, D. M., El-Tarabily, K. A., & AbuQamar, S. F. (2021). Evaluation of streptomycete actinobacterial isolates as biocontrol agents against royal poinciana stem canker disease caused by the fungal pathogen Neoscytalidium dimidiatum. Biological Control, 164, Article 104783. https://doi.org/10.1016/j.biocontrol.2021.104783 3. Alblooshi, A. A., Purayil, G. P., Saeed, E. E., Ramadan, G. A., Tariq, S., Altaee, A. S., El-Tarabily, K. A., & AbuQamar, S. F. (2021). Biocontrol potential of endophytic actinobacteria against Fusarium solani, the causal agent of sudden decline syndrome on date palm in the UAE. Journal of Fungi, 8(1), Article 8. https://doi.org/10.3390/jof8010008 4. Ali-Tan, K. Z., Radziah, O., Halimi, M. S., Rahim, K. B. A., Abdullah, M. Z., & Shamsuddin, Z. H. (2017). Growth and yield responses of rice cv. MR219 to rhizobial and plant growth-promoting rhizobacterial inoculations under different fertilizer-N rates. Bangladesh Journal of Botany, 46(1), 481-488. 5. Arriel-Elias, M. T., Oliveira, M. I., Silva-Lobo, V. L., Filippi, M. C. C., Babana, A. H., Conceição, E. C., & Cortes, M. D. C. (2018). Shelf-life enhancement of plant growth promoting rhizobacteria using a simple formulation screening method. African Journal of Microbiology Research, 12(5), 115-126. https://doi.org/10.5897/AJMR2017.8787
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