Aspergillus penicillioides—a true halophile existing in hypersaline and polyhaline econiches
2014
Nazareth, Sarita | Gonsalves, Valerie
Aspergillus penicillioides is a true halophile, present in diverse econiches from the hypersaline athalassohaline Dead Sea and the thalassohaline solar salterns, to the polyhaline estuaries and mangroves of Goa-India. Thirty-nine isolates from these environments were seen to be moderate halophiles, stenohaline or euryhaline in nature, with comparable salt tolerance indices. They had an obligate need for a low water activity and were unable to grow on a regular defined medium such as Czapek Dox Agar, or on various nutrient rich agar media such as Malt Extract, Potato Dextrose and Sabouraud Agar; however, growth was obtained on all these media when amended with 10 % solar salt. In the absence of added salt, the conidia either did not germinate, or when germinated, distortions and lysis were seen in the short mycelial forms; on media with salt, the mycelia and vesicles appeared normal.
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