Some aspects of the extreme anoxia tolerance of the sweet flag, Acorus calamus L.

Weber, Michel; Brändle, Roland (1996). Some aspects of the extreme anoxia tolerance of the sweet flag, Acorus calamus L. Folia Geobotanica, 31(1), pp. 37-46. Springer 10.1007/BF02803992

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Acorus calamus L. is a neophyte in Europe with remarkable properties. Among other things, it is the most anoxia tolerant species and a competitive invader at eutrophic sites. The following overview presents the most recent work on these subjects. Carbohydrates of the rhizomes sustain anaerobic ATP production for very long periods. Ethanolic fermentation naturally occurs in winter and produces rather low, but sufficient amounts of ATP for survival, as shown by adenylate energy charge and total adenylate content. Fermentation energy is mainly used for the synthesis and preservation of essential macromolecules, such as proteins and membrane lipids. The extent of these processes is unique. Moreover, ammonia and sulphide uptake is maintained during the cold season. Both ions are detoxified to alanine and thiols which are translocated into the rhizome, where the nitrogen of alanine is used to form arginine. Overwintering leaves contain asparagine instead of arginine. Recycled nitrogen compounds from the rapidly degrading summer leaves return into the rhizomes. Therefore, the nitrogen nutrition consists of an external and internal cycle. The abundance of carbohydrates and nitrogen compounds allows spring shoot growth earlier than other species. These strategies could contribute markedly to the competitive power of A. calamus at its natural site.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Anoxia / Postanoxia (discontinued)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Brändle, Roland

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

1211-9520

Publisher:

Springer

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

06 Jul 2017 09:33

Last Modified:

14 Nov 2017 15:07

Publisher DOI:

10.1007/BF02803992

Additional Information:

Symposium on Adaptation Strategies in Wetland Plants - Links Between Ecology and Physiology, TREBON, CZECH REPUBLIC, SEP 07-10, 1994

Uncontrolled Keywords:

ammonia; energy metabolism; fermentation; macromolecule synthesis; membrane stability; oxygen deprivation; sulphide

BORIS DOI:

10.7892/boris.91764

URI:

https://boris.unibe.ch/id/eprint/91764

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