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Agriculture and Biomedical OPEN ACCESS

Functional and Taxonomic Structure of Soil Algoflora Relevant to Irrigated Agroecosystems of Quva District, Uzbekistan: Regional Quantitative Synthesis and A Paired Soil-Monitoring Framework

M.A. Djorabayeva
Fergana State University, Fergana, Uzbekistan
DOI Crossref DOI 10.37547/tajabe/Volume08Issue01-06
tajabe 2026
VOL. 8 / NO. 01 JANUARY
FULL TEXT PP. 40-52
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VOLUME 8
ISSUE 01
YEAR 2026
PAGES 40-52
RESEARCH OVERVIEW

Abstract

Photosynthetic microorganisms in agricultural soils may contribute to organic matter production, extracellular polymer formation and nutrient transformations, but their functional significance cannot be inferred from a taxonomic inventory alone. This quantitative secondary synthesis examines the relevant regional evidence and develops an analysis-ready soil–algoflora monitoring framework for the irrigated agroecosystems of Quva district, Uzbekistan. Historical Fergana Valley observations comprising 159 reported algal species and infraspecific taxa were reanalysed by seven morphological categories and by a six-division × five-soil-type table. Coccoid forms represented 63 taxa (39.62%) and simple filaments 51 (32.08%), together accounting for 71.70% of the regional list. Regional soil-type inventories ranged between 63 and 109 taxa, with notable differences in the proportional representation of cyanobacteria and green algae. Literature-reported algal abundance was 19.0–60.0 thousand cells per gram of soil overall, while ranges for individual broad groups were also documented. These endpoints are literature ranges, not uncertainty intervals, and cannot be combined to estimate simultaneous community structure. No Quva-specific paired biological and physicochemical samples were identified in the datasets analysed; thus no novel species records or correlation coefficients for Quva are claimed. Building on critical literature about algal exopolysaccharides, photosynthetic carbon assimilation and nitrogen-related pathways, we specify which measured variables, experimental units and statistical procedures are required to examine possible relationships between algal traits, salinity, organic carbon and nutrient status. The contribution is an auditable numerical reference and an explicitly testable framework for original research in irrigated Quva soils.

RESEARCH TOPICS

Keywords

Soil phototrophs algal morphotypes Quva district
SOURCES & SCHOLARSHIP

References

  1. Tukhtaboeva, Y. A. (2019). Algoflora of the main soil types of the Fergana Valley [PhD dissertation abstract]. Institute of Botany / Namangan State University. https://api.ziyonet.uz/uploads/books/251467/5d27044e0470a.pdf
  2. Koriyev, M., Mirzahmedov, I., Boymirzaev, K., & Juraev, Z. (2025). Effects of mulching, terracing, and efficient irrigation on soil salinity reduction in Uzbekistan’s Fergana Valley. Cogent Food & Agriculture, 11(1), 2449201. https://doi.org/10.1080/23311932.2024.2449201
  3. Abinandan, S., Subashchandrabose, S. R., Venkateswarlu, K., & Megharaj, M. (2019). Soil microalgae and cyanobacteria: The biotechnological potential in the maintenance of soil fertility and health. Critical Reviews in Biotechnology, 39(8), 981–998. https://doi.org/10.1080/07388551.2019.1654972
  4. Ramakrishnan, B., Maddela, N. R., Venkateswarlu, K., & Megharaj, M. (2023). Potential of microalgae and cyanobacteria to improve soil health and agricultural productivity: A critical view. Environmental Science: Advances, 2, 586–611. https://doi.org/10.1039/D2VA00158F
  5. Joseph, J., & Ray, J. G. (2024). A critical review of soil algae as a crucial soil biological component of high ecological and economic significance. Journal of Phycology, 60(2), 229–253. https://doi.org/10.1111/jpy.13444
  6. Tukhtaboeva, Y. A., Krivina, E. S., Redkina, V. V., & Temraleeva, A. D. (2024). Microalgae from eroded soils in the northern Fergana Valley, Uzbekistan. Microbiology, 93(4), 397–413. https://doi.org/10.31857/S0026365624040024
  7. Rossi, F., Mugnai, G., & De Philippis, R. (2022). Cyanobacterial biocrust induction: A comprehensive review on a soil rehabilitation-effective biotechnology. Geoderma, 415, 115766. https://doi.org/10.1016/j.geoderma.2022.115766
  8. Garcia-Pichel, F. (2023). The microbiology of biological soil crusts. Annual Review of Microbiology, 77, 149–171. https://doi.org/10.1146/annurev-micro-032521-015202
  9. Askarov, K. A., & Djorabayeva, M. A. (2025). Algoflora of the main soil types of the Fergana Valley [Repository record]. Zenodo. https://doi.org/10.5281/zenodo.15716276
  10. Turdaliev, A., Askarov, K., Abakumov, E., Makhkamov, E., Rahmatullayev, G., Mamajonov, G., Akhmadjonov, A., & Axunov, A. (2023). Biogeochemical state of salinized irrigated soils of Central Fergana (Uzbekistan, Central Asia). Applied Sciences, 13(10), 6188. https://doi.org/10.3390/app13106188
  11. Nawaz, T., Joshi, N., Nelson, D., et al. (2024). Harnessing the potential of nitrogen-fixing cyanobacteria: A rich bio-resource for sustainable soil fertility and enhanced crop productivity. Environmental Technology & Innovation, 36, 103886. https://doi.org/10.1016/j.eti.2024.103886