NDLI: Interaction between photorespiration and respiration in transgenic potato plants with antisense reduction in glycine decarboxylase

Content Provider	Springer Nature Link
Author	Bykova, Natalia V. Keerberg, Olav Pärnik, Tiit Bauwe, Hermann Gardeström, Per
Copyright Year	2005
Abstract	Potato (Solanum tuberosum L. cv. Désirée) plants with an antisense reduction in the P-protein of the glycine decarboxylase complex (GDC) were used to study the interaction between respiration and photorespiration. Mitochondria isolated from transgenic plants had a decreased capacity for glycine oxidation and glycine accumulated in the leaves. Malate consumption increased in leaves of GDC deficient plants and the capacity for malate and NADH oxidation increased in isolated mitochondria. A lower level of alternative oxidase protein and decreased partitioning of electrons to the alternative pathway was found in these plants. The adenylate status was altered in protoplasts from transgenic plants, most notably the chloroplastic ATP/ADP ratio increased. The lower capacity for photorespiration in leaves of GDC deficient plants was compensated for by increased respiratory decarboxylations in the light. This is interpreted as a decreased light suppression of the tricarboxylic acid cycle in GDC deficient plants in comparison to wild-type plants. The results support the view that respiratory decarboxylations in the light are restricted at the level of the pyruvate dehydrogenase complex and/or isocitrate dehydrogenase and that this effect is likely to be mediated by mitochondrial photorespiratory products.
Starting Page	130
Ending Page	140
Page Count	11
File Format	PDF
ISSN	00320935
Journal	Planta
Volume Number	222
Issue Number	1
e-ISSN	14322048
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-04-05
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solanum Glycine decarboxylase complex Mitochondria Photorespiration Photosynthesis Protoplast Pyruvate dehydrogenase complex Respiration Plant Sciences Agriculture Ecology Forestry
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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