The Biotic Relationship of Anthoceros and Phaeoceros to Certain Cyanophyta

When the Nostoc isolates entered into thalloid cavities of Anthoceros and Phaeoceros and produced the typical globose endophytic colonies and/or when the algal isolate grew upon the nitrogen-free substrate in intimate contact with the thalli, chlorosis in the experimental cultures was not present to...

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Bibliographic Details
Published in:Annals of the Missouri Botanical Garden 1967-01, Vol.54 (2), p.95-102
Main Author: Ridgway, John E.
Format: Article
Language:English
Subjects:
Algae
Axenic culture
Botanical gardens
Cyanobacteria
Liverworts
Nitrogen
Nitrogen fixation
Plant cells
Plant growth
Thallus
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Summary:When the Nostoc isolates entered into thalloid cavities of Anthoceros and Phaeoceros and produced the typical globose endophytic colonies and/or when the algal isolate grew upon the nitrogen-free substrate in intimate contact with the thalli, chlorosis in the experimental cultures was not present to the degree that it occurred in the control cultures. These observations suggest the ability of these blue-green algal isolates to fix atmospheric nitrogen and to provide an available source to the liverworts used in these experiments. Cytochemical and ultrastructural observations further suggest that the algal endophyte may also benefit from this relationship if the algae are able to catabolize carbohydrate components of the mucilaginous thalloid cavity.
ISSN:0026-6493
DOI:10.2307/2394997