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  The Role of Diglycosyl Lipids in Photosynthesis and Membrane Lipid Homeostasis in Arabidopsis

Holzl, G., Witt, S., Gaude, N., Melzer, M., Schöttler, M. A., & Doermann, P. (2009). The Role of Diglycosyl Lipids in Photosynthesis and Membrane Lipid Homeostasis in Arabidopsis. Plant Physiology, 150(3), 1147-1159. doi:10.1104/pp.109.139758.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-25AB-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-974B-F
Genre: Journal Article

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 Creators:
Holzl, G.1, Author
Witt, S.2, Author              
Gaude, N.2, Author              
Melzer, M.1, Author
Schöttler, M. A.3, Author              
Doermann, P.2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Plant Lipids, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753347              
3Photosynthesis Research, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753323              

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Free keywords: deficient dgd1 mutant photosystem-i digalactosyldiacylglycerol synthase digalactosyl-diacylglycerol phosphate deprivation chloroplast division angstrom resolution thylakoid membrane electron-transport state transitions
 Abstract: The galactolipid digalactosyldiacylglycerol (DGD) is an abundant thylakoid lipid in chloroplasts. The introduction of the bacterial lipid glucosylgalactosyldiacylglycerol (GGD) from Chloroflexus aurantiacus into the DGD-deficient Arabidopsis (Arabidopsis thaliana) dgd1 mutant was previously shown to result in complementation of growth, but photosynthetic efficiency was only partially restored. Here, we demonstrate that GGD accumulation in the double mutant dgd1dgd2, which is totally devoid of DGD, also complements growth at normal and high-light conditions, but photosynthetic efficiency in the GGD-containing dgd1dgd2 line remains decreased. This is attributable to an increased susceptibility of photosystem II to photodamage, resulting in reduced photosystem II accumulation already at normal light intensities. The chloroplasts of dgd1 and dgd1dgd2 show alterations in thylakoid ultrastructure, a phenotype that is restored in the GGD-containing lines. These data suggest that the strong growth retardation of the DGD-deficient lines dgd1 and dgd1dgd2 can be primarily attributed to a decreased capacity for chloroplast membrane assembly and proliferation and, to a smaller extent, to photosynthetic deficiency. During phosphate limitation, GGD increases in plastidial and extraplastidial membranes of the transgenic lines to an extent similar to that of DGD in the wild type, indicating that synthesis and transport of the bacterial lipid (GGD) and of the authentic plant lipid (DGD) are subject to the same mechanisms of regulation.

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Language(s): eng - English
 Dates: 2009-05-012009
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: ISI:000268696800005
DOI: 10.1104/pp.109.139758
ISSN: 0032-0889 (Print)0032-0889 (Linking)
URI: ://000268696800005http://www.jstor.org/stable/pdfplus/40538083.pdf
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Title: Plant Physiology
  Other : Plant Physiol.
Source Genre: Journal
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Publ. Info: Bethesda, Md. : American Society of Plant Biologists
Pages: - Volume / Issue: 150 (3) Sequence Number: - Start / End Page: 1147 - 1159 Identifier: ISSN: 0032-0889
CoNE: https://pure.mpg.de/cone/journals/resource/991042744294438