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GLYCINE OXIDATION IN MITOCHONDRIA ISOLATED FROM LIGHT GROWN AND ETIOLATED PLANT-TISSUE
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).ORCID iD: 0000-0001-5900-7395
1991 (English)In: Physiologia Plantarum: An International Journal for Plant Biology, ISSN 0031-9317, E-ISSN 1399-3054, Vol. 82, no 3, 339-344 p.Article in journal (Refereed) Published
Abstract [en]

Mitochondria were isolated from light grown and dark grown monocotyledonous (wheat-Triticum aestivum and barley-Hordeum vulgare) and dicotyledonous (pea-Pisum sativum) plants and their capacity to oxidize glycine was measured. In all of the studied plant species the rate of mitochondrial glycine oxidation was high in light grown leaves. Glycine oxidation in mitochondria from etiolated leaves was also very substantial; the rate of glycine oxidation relative to the oxidation of other substrates was about half as compared to green tissue. In etiolated non-photosynthetic tissues the relative glycine oxidation was only ca 20% of that measured in green leaves. The effect of light on the development of glycine oxidation capacity was studied using etiolated barley which was transferred to light for 6 to 24 h. During this time the rate of glycine oxidation as compared to the oxidation of NADH and malate increased, approaching the ratio observed in light grown leaves. It is concluded that the synthesis of proteins involved in glycine oxidation is regulated both in a light dependent and in a tissue specific manner. Monocotyledonous plants should be very useful for further studies of this aspect due to the relatively small developmental difference between etiolated and light grown leaf tissue.

Place, publisher, year, edition, pages
1991. Vol. 82, no 3, 339-344 p.
Identifiers
URN: urn:nbn:se:umu:diva-46915DOI: 10.1111/j.1399-3054.1991.tb02915.xISI: A1991FZ93500002OAI: oai:DiVA.org:umu-46915DiVA: diva2:447235
Available from: 2011-10-11 Created: 2011-09-16 Last updated: 2017-12-08

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Gardeström, Per

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