Research area · physiology

Morphological and Physiological Characterization of Streptomyces silvae TMS4I1

Experimental characterization shows that S. silvae TMS4I1 combines characteristic streptomycete morphology with broad tolerance to multiple environmental stress conditions.

This page integrates colony morphology, scanning electron microscopy, and physiological assays to summarize growth behavior, structural traits, and environmental adaptability of the strain.

Key findings Jump to stress tolerance

Key findings

Streptomycete morphology

TMS4I1 shows characteristic colony differentiation and filamentous hyphal growth consistent with typical streptomycete morphology.

Broad temperature tolerance

Growth was observed across a wide temperature range from 7–37 °C.

pH and salt adaptability

The strain tolerates pH conditions from pH 2–10 and NaCl concentrations up to 10 %.

Robust stress profile

Lysozyme resistance and pronounced β-hemolytic activity underline the physiological resilience of the strain.

Overview

  • Macro- and micromorphology
  • Salt tolerance
  • Hemolytic activity
  • Lysozyme resistance
  • Temperature optimum
  • pH tolerance

Macro- and micromorphology

Colony morphology was documented on standardized media to capture medium-dependent differences in pigmentation, aerial mycelium formation, and colony architecture. Scanning electron microscopy complements these observations by visualizing filamentous growth and microstructural features.

Micro- and macromorphology of Streptomyces silvae TMS4I1
Figure 1. Macro- and micromorphology of S. silvae TMS4I1. Panel A shows colony morphology on standardized media after 14 days at 28 °C; Panel B shows a scanning electron micrograph after 10 days on MYM agar at 28 °C.
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Macromorphology

Colony morphology varies with cultivation medium, including visible differences in pigmentation, surface structure, and colony architecture.

Micromorphology

SEM imaging reveals filamentous hyphae and differentiated microscopic features characteristic of streptomycetes.

Physiological characterization and stress tolerance

To assess environmental adaptability, TMS4I1 was tested under multiple stress-related conditions including salt exposure, lysozyme treatment, temperature variation, pH variation, and hemolytic activity assays.

Physiological characterization and stress tolerance of Streptomyces silvae TMS4I1
Figure 2. Physiological characterization of S. silvae TMS4I1, including salt tolerance, β-hemolytic activity, lysozyme resistance, temperature-dependent growth, and pH tolerance. Unless noted otherwise, assays were performed in basal medium 5339 and incubated for 14 days at 28 °C.
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Environmental tolerance

The strain grows across a broad range of salt concentrations, temperatures, and pH conditions, indicating substantial ecological flexibility.

Stress-related traits

Lysozyme resistance and pronounced β-hemolytic activity reinforce the robust physiological profile of TMS4I1.

The combined morphological and physiological data show that S. silvae TMS4I1 displays both characteristic streptomycete colony and hyphal morphology and broad tolerance to variable environmental conditions. Growth across a wide range of temperature, salt, and pH conditions, together with lysozyme resistance and β-hemolytic activity, supports the view that this strain is physiologically adaptable and robust under changing conditions.