Water activity, temperature, and pH effects on growth of Fusarium moniliforme and Fusarium proliferatum isolates from maize

• DOI: 10.1139/m95-149
• Publication Date: 2009-10-08T13:53:45Z
• Authors: Sonia Marin; Vicente Sanchis; Naresh Magan
• Keywords: Fusarium proliferatum; Water activity

The effects of water activity (a w , 0.994–0.90 ≡ 0.4–14.0 (–)MPa potential), temperature (4–45 °C), and pH (3.6, 5.5, 7.0), their interactions on growth isolates Fusarium moniliforme proliferatum were determined in vitro a maize extract agar medium. Growth two F. four significantly influenced by regardless solute type used (NaCl, glycerol, or glucose). However, at steady-state levels, was optimum 0.994–0.98 reduced 0.92 . Further detailed studies with one isolate (25N) (73N, 13 IN) showed that occurred over the range 20–35 °C slight differences between species. did occur 4 0.994–0.96 but no recorded 40 45 Profiles × relations for these species constructed from data first time. Optimum 5.5 25 both proliferatum, 7.0 30 moniliforme. latter <0.98 changed. pH, temperature, single, two-way three-way all found to be statistically significant three isolates. ecological significance this information understanding important fumonisin-producing fungi is discussed.Key words: activity, fumonisin-producing, moniliforme, maize.