Protein Hydrolysis and Nitrogen Remobilisation in Plant Life and Senescence

Brouquisse, Renaud; Masclaux, Céline; Feller, Urs; Raymond, Philippe (2001). Protein Hydrolysis and Nitrogen Remobilisation in Plant Life and Senescence. In: Lea, Peter J.; Morot-Gaudry, Jean-François (eds.) Plant Nitrogen (pp. 275-293). Berlin, Heidelberg: Springer Berlin Heidelberg 10.1007/978-3-662-04064-5_11

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In plant cells, as in all other cells, proteins are submitted to permanent turnover, and the intracellular content of a given protein depends on its rate of both synthesis and degradation. The life time of most proteins is shorter than that of the cell. Thus, in young leaves of Lemna minor, the average half-life of protein was estimated to be 7 days, and it was shorter under stress conditions (Davies 1982). Such observations mean that nitrogen and amino acid fluxes are both cylic and permanent. Although protein turnover may appear wasteful, in terms of energy, numerous studies have shown that proteolysis provides multiple functions in cell physiology, and is an essential regulatory mechanism of cell metabolism and development.

Item Type:

Book Section (Book Chapter)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant nutrition (discontinued)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Feller, Urs

Subjects:

500 Science > 580 Plants (Botany)

ISBN:

978-3-642-08731-8

Publisher:

Springer Berlin Heidelberg

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

13 Jul 2016 12:50

Last Modified:

09 Sep 2017 18:44

Publisher DOI:

10.1007/978-3-662-04064-5_11

BORIS DOI:

10.7892/boris.83563

URI:

https://boris.unibe.ch/id/eprint/83563

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