Summary
Xanthoria parietina is a lichen constituted by an Ascomycete as the fungal partner and by Trebouxia and Pseudotrebouxia as green algal phyco-or photobionts. Cellular cycle and development of the photobionts seem to be regulated by the mycobiont, although the molecular bases of these phenomena are still unknown. The phycocide characteristic of lichen phenolics as well as the capacity to enter the algae let us think that these compounds may be related to the control of photobiont growth and development. Besides, fungal isolectins with arginase activity are implicated in the complex mechanism of regulation between the mycobiont and the phycobiont. This work compares the distribution of frequencies of the cellular size of recent-isolated photobionts and cultured photobionts under aposymbiotic conditions during two months. The observed high yield of aplano-sporangia in culture, in contrast to the results obtained under natural conditions, is an evidence for strict control of the mycobiont upon the phycobiont.
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© 1997 Springer-Verlag Berlin Heidelberg
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Molina, M.C., Stocker-Wörgötter, E., Zorer, R., Türk, R., Vicente, C. (1997). Comparison Between Recent-Isolated and Cultured Populations of Phycobionts From Xanthoria parietina (L.). In: Schenk, H.E.A., Herrmann, R.G., Jeon, K.W., Müller, N.E., Schwemmler, W. (eds) Eukaryotism and Symbiosis. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60885-8_42
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DOI: https://doi.org/10.1007/978-3-642-60885-8_42
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