Carbohydrate and protein metabolism in the rhizomes of the bulrush (Schoenoplectus lacustris (L.) Palla) in relation to natural development of the whole plant

Steinmann, Fritz; Brändle, Roland (1984). Carbohydrate and protein metabolism in the rhizomes of the bulrush (Schoenoplectus lacustris (L.) Palla) in relation to natural development of the whole plant. Aquatic botany, 19(1-2), pp. 53-63. Elsevier 10.1016/0304-3770(84)90007-X

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The metabolism of reserve substances in the rhizome of the bulrush was investigated during the course of the year in the context of the natural development of the whole plant. The most important reserve substance in the rhizome is starch, which accounts for 15% of freshh weight in winter, During the formation of new shoots in spring almost all this starch is mobilised, mainly by starch phosphorylase, which shows a 10-fold greater activity as compared tot otal amylase activity. During the second half of the year, activity of the starch-mobilising enzymes increases parallel to increases in starch content, although starch mobilisation has not yet commenced. Sucrose content of the rhizomes reaches values as high as 30 mg g−1 fresh weight in winter; during the photosynthetic phase, the content remains at a more or less constant level of 15 mg g−1 fresh weight. In contrast, the reducing sugars glucose, fructose and maltose attain maximum values during the summer months. Glucose and fructose, which appear in identical quantities at all stages of development, show values of up to 6 mg g−1 fresh weight in summer. A second maximum in reducing sugars occurs in February; contents of glucose and fructose are then around 2.5 mg g−1 fresh weight. Protein content was found to be highest in winter, with values of approximately 10 mg g−1 fresh weight. In spring, around two-thirds of this figure is mobilised.

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:

0304-3770

Publisher:

Elsevier

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

06 Jun 2017 14:05

Last Modified:

09 Aug 2018 11:42

Publisher DOI:

10.1016/0304-3770(84)90007-X

URI:

https://boris.unibe.ch/id/eprint/91779

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