Sampleswere theninoculated into enrichedmediumf/2 [9]
andWalne’smedium[10]prior toplacementinaphotoincubator
set at 25 1 C, a light intensity of 60 mmol photon s1m2
(as supplied by cool-white fluorescence tubes) and a 12:12 h
dark:light photoperiod for 3 days