Figure 4 | Scientific Reports

Figure 4

From: Mechanisms protect airborne green microalgae during long distance dispersal

Figure 4

A Vitalities of the six microalgal strains after freeze–desiccation stress treatments. Early stationary phase cells of the six microalgal species were air-dried on the bench and placed at − 20 °C for 1, 2 and 4 weeks before spread onto the agar plates. All the four airborne microalgae DSA1, DSA2, DSA3, and DSA6 grew into dense cell lawns in 7 days but the two waterborne species died after these stress treatments. B Vitalities of the six microalgal strains after desiccation stress treatments. Early stationary phase cells of the six strains were air-dried on the bench and placed at room temperature in the dark for 14 or 21 days before spread onto the agar plates. The four airborne microalgae DSA1, DSA2, DSA3, and DSA6 grew into dense cell lawns in 7 days but the two waterborne species died after the stress treatments. C Vitalities of the six microalgal strains after lyophilization treatment. Early stationary phase cells of the six microalgal strains were air-dried on the bench and lyophilized for 16 h. One hundred mg of the treated cells of each strain was inoculated into a bottle and allowed to grow for 7 days. The three airborne microalgae DSA1, DSA2, DSA3 grew into dense cultures but the airborne species DSA6 and the two waterborne species died after the stress treatments.

Back to article page