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September 17, 2026International MicrobiologyOpen Access

Streptomyces rhizobacteria enhance growth and drought tolerance in maize (Zea mays L.) under greenhouse conditions

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Authors

LRLuísa Machado RamosFBFelipe Dias Bandeira BerlezeLSLuca Doval Terra de Souza e Souza

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Overview

Experimental greenhouse study demonstrates enhanced biomass and root elongation in drought-stressed maize inoculated with Streptomyces, highlighting their potential as sustainable bioinoculants.

Key Points

  • To evaluate whether rhizospheric Streptomyces isolates retain plant growth-promoting traits under water stress and alleviate drought-related growth constraints in maize.
  • Screened four Streptomyces isolates (CLV16, CLV100, CLV115, CLV179) under PEG6000-induced water stress (-0.6, -1.0, and -1.7 MPa) for growth, phosphate solubilization, siderophores, indolic compounds, and ammonia production.
  • Tested inoculated maize plants under greenhouse conditions subjected to severe water stress at 30% field capacity (soil moisture 5.4–12.8%) versus well-watered controls at 100% field capacity (soil moisture 19.2–28.2%).
  • All isolates retained phosphate solubilization and siderophore production across stress levels; under severe stress (-1.7 MPa), CLV100 exhibited threefold greater colony growth, CLV115 produced 8.9-fold higher indolic compounds, and CLV179 produced threefold more ammonia relative to other isolates.
  • In greenhouse trials under 30% field capacity, isolates CLV100 and CLV115 improved maize shoot growth and overall biomass accumulation compared with non-inoculated controls.
  • Isolate CLV179 increased root length by 22% in drought-stressed maize compared with non-bacterized controls.

Cite This Study

Ramos et al. (2026) studied this question.

synapsesocial.com/papers/6aabb7f75f706d05830e768ehttps://doi.org/10.1007/s10123-026-00896-z
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