Abstract
Ten fungi, Aspergillus niger, A. flavus, A. ochraceus, A. ruber, A. repens, A. amstelodami, Alternaria tenuis, Penicillium brevi-compactum, Cladosporium herbarum, and Chaetomium dolicotrichum, were isolated from moldy flue-cured tobacco and grown in various mixtures of N2-O2 or CO2-O2. A 1 to 5% concentration of O2 in an N2 atmosphere caused the greatest change in growth of the nine species, and a 10 to 20% concentration of O2 for A. flavus. All species, except A. amstelodami and A. ruber, grew faster in air than in mixtures containing 10% O2. High O2 concentrations generally inhibited furrow production in the mycelial mats. In an atmosphere of 5 to 40% O2 in the N2 atmosphere, furrows formed in mycelial mats between 5 and 40% O2 in the species except for A. ruber, A. repens, and A. amstelodami, which produced none in any concentration. As O2 decreased below 20%, spore production was progressively decreased, colony color faded to white, and cleistothecia formation was suppressed. In CO2-O2 mixtures radial growth of all species increased with each quantitative decrease of CO2. All species except A. niger grew faster in air than in 10% CO2. In contrast to N2-O2 mixtures, the fungi formed furrows, sporulation and cleistothecial formation were suppressed, and colony color changed to white in higher O2 concentrations.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Stotzky G., Goos R. D. Adaptation of the soil microbiota to high CO2 and low O2 tensions. Can J Microbiol. 1966 Aug;12(4):849–861. doi: 10.1139/m66-112. [DOI] [PubMed] [Google Scholar]
- Welty R. E., Lucas G. B., Fletcher J. T., Yang H. Fungi isolated from tobacco leaves and brown-spot lesions before and after flue-curing. Appl Microbiol. 1968 Sep;16(9):1309–1313. doi: 10.1128/am.16.9.1309-1313.1968. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Welty R. E., Lucas G. B. Fungi Isolated from Damaged Flue-cured Tobacco. Appl Microbiol. 1968 Jun;16(6):851–854. doi: 10.1128/am.16.6.851-854.1968. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Welty R. E., Lucas G. B. Fungi Isolated from Flue-cured Tobacco at Time of Sale and After Storage. Appl Microbiol. 1969 Mar;17(3):360–365. doi: 10.1128/am.17.3.360-365.1969. [DOI] [PMC free article] [PubMed] [Google Scholar]