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1

Galactolipase and chilling sensitivity of plants

100%
Kaniuga Z.
Acta Biochimica Polonica
|
1997
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tom 44
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nr 1
Galactolipase is a lipid acyl hydrolase (EC 3.1.1.26) acting predominantly on galactolipids which constitute up to 80% of total acyl lipids in chloroplast membrane. Evidence is presented on the involvement of this enzyme in plant response to chilling via degradation of membrane lipids and the increase of free, fatty acids, associated with reduced oxygen evolution in the Hill reaction. The occurrence of two pools of fatty acids has been hypothesized. Analysis of numerous plant species showed higher galactolipase activity in the chilling-sensitive than in the chilling-resistant plants. Differences in the pH-dependence curve and in the response to detergents of galactolipases from these two groups of plants suggest heterogeneity of the enzyme. Referring to the hypothesis concerning the role of high melting-point fatty acids of phosphatidylglicerol molecular species in chilling sensitivity the data are presented against generalization of this hypothesis.
2
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Proteoliposomes vs. thylakoids

80%
Gieczewska K., Mazur R., Grzyb J., Mostowska A.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2013
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tom 94
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nr 3
3

Modulation of plant nuclear matrix nucleolytic activity and specificity may result from interaction of nuclease-protein 14-3-3 complex with inner nuclear membrane lipids

80%
Lubocka J., Kozubek A.
Cellular and Molecular Biology Letters
|
1998
|
tom 03
|
nr 1
Plant cell nuclear matrix depleted in lipids exhibited approximately 50% lower endonucleolytic activity attributed to 32 kDa nuclease. Supplementation of delipidated matrix with phospholipids, sterols and glycolipids resulted in the recovery of nuclease activity. The extent of recovery is dependent upon the type of lipid used for reconstitution. The most effective (over 97%) in recovery of the nucleolytic activity were PC, PE, DGDG and stigmasterol. Some recovery is also observed when other natural amphiphilic molecules are studied (resorcinolic lipids). Recombinant plant protein 14-3-3 showed ability for direct interaction with lipid monolayers. The interaction was confirmed by analysis of the monolayer collected from the subphase after incubation with protein 14-3-3. Deletion of the 12 kDa N-terminal fragment of the protein 14-3-3 abolished its ability for binding to lipid monolayer. The results suggest that in vivo direct interaction of protein 14-3-3 with nuclear envelope lipids may participate in modulation of the nuclease 32 kDa activity. A postulated model of the interactions is discussed.
4

Changes in the composition of fatty acids and sterols of membrane lipids during induction and differentiation of Brassica napus [var.oleifera L.] callus

80%
Zur I., Skoczowski A., Niemczyk E., Dubert F.
Acta Physiologiae Plantarum
|
2002
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tom 24
|
nr 1
5

Antioxidant enzymes and membrane lipid composition of disease resistant tomato plants regenerated from crown galls

61%
Barna B., Pogany M.
Acta Physiologiae Plantarum
|
2001
|
tom 23
|
nr 3
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