Isotropic growth of spores and salt tolerance in Aspergillus nidulans
Abstract
We report an investigation into the relationship between Aspergillus nidulans mutations sltA1 and agaA50 conferring salt sensitivity and arginase deficiency, respectively, and the ability of spores to swell and commence germination. Spores from both mutant strains exhibited uncontrolled swelling at pH 5.5 in the presence of arginine as the nitrogen source. The controlled swelling of spores from a salt tolerant strain under these conditions was disrupted by the Na+/H+ exchange inhibitor amiloride. Swelling in the presence of amiloride was associated with an elevation in the concentration of arginine within the spores of each strain tested. The possible consequences of alterations in the arginine economy of the spore for colony establishment in osmotically challenged habitats are discussed.Citation
Mycological Research, 106(12): 1480-1486Publisher
Elsevier Science DirectJournal
Mycological ResearchType
Journal articleLanguage
enISSN
0953756214698102
ae974a485f413a2113503eed53cd6c53
10.1017/S0953756202006949