Wyniki wyszukiwania - Biblioteka Nauki

1

Uruchomienie produkcji papierów powlekanych polietylenem i kopolimerem chlorku winylidenu o właściwościach barierowych

100%

Borek S.

Przegląd Papierniczy

|

1991

|

tom 47

|

nr 04

2

Jakość drewna i jakość masy celulozowej siarczanowej

100%

Borek S.

|

nr 07-08

3

Regulatory function of sucrose in gene expression of lipase and NAD+ - and NADP+ - dependent isocitric dehydrogenase in organs of germinating yellow lupine seeds (Lupinus luteus L.) grown in vitro

63%

Borek S. , Nuc K.

|

tom 51

|

nr 2

4

Rośliny transgeniczne źródłem wysokiej jakości olejów

63%

Borek S. , Galor A.

Kosmos

|

2012

|

tom 61

|

nr 3

5

Sugars as a metabolic regulator of storage protein mobilization in germinating seeds of yellow lupine [Lupinus luteus L.]

63%

Borek S. , Ratajczak W.

|

tom 24

|

nr 4

6

Regulation by sucrose of storage compounds breakdown in germinating seeds of yellow lupine (Lupinus luteus L.), white lupine (Lupinus albus L.) and Andean lupine (Lupinus mutabilis Sweet): I. Mobilization of sorage protein

51%

Borek S. , Kubala S. , Kubala S.

|

nr 2

EN

Research of the regulatory function of sucrose in storage protein breakdown was conducted on isolated embryo axes, excised cotyledons and whole seedlings of three lupine species grown in vitro on medium with 60 mM sucrose or without the sugar. Sucrose stimulated growth of yellow, white and Andean lupine isolated embryo axes and cotyledons but growth of seedlings was inhibited. Dry matter content was higher in sucrose-fed isolated organs and in seedling organs. Ultrastructure research revealed that lack of sucrose in the medium caused enhancement in storage protein breakdown. Protein deposits in cotyledons were smaller as well as soluble portion content in all studied organs was lower when there was no sucrose in the medium. In the same conditions, the activity of glutamate dehydrogenase was significantly higher. Increase in vacuolization of cells of white lupine root meristematic zone cells was observed and induction of autophagy in young carbohydrate-starved embryo axes is discussed.

7

Asparagine slows down the decomposition of autophagic bodies in sugar starved embryo axes of lupin (Lupinus spp.)

51%

Borek S. , Paluch E. , Pukacka S.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 3

8

Regulation by sucrose of storage compounds breakdown in germinating seeds of yellow lupine (Lupinus luteus L.), white lupine (Lupinus albus L.) and Andean lupine (Lupinus mutabilis Sweet). II. Mobilization of storage lipid

51%

Borek S. , Pukacka S. , Michalski K.

|

nr 3

EN

Research of the regulatory function of sucrose in storage lipid breakdown was conducted on isolated embryo axes, excised cotyledons and whole seedlings of three lupine species grown in vitro on medium with 60 mM sucrose or without the sugar. Lack of sucrose in the medium caused significant increase in total lipid content in yellow, white and Andean lupine isolated embryo axes but in Andean lupine seedling cotyledons and excised cotyledons, lipid level was clearly lower in carbohydrates deficient conditions. Sucrose caused no significant effect on fatty acids spectra. The main fatty acid in yellow lupine seeds was linoleic acid, in white lupine oleic acid and in Andean lupine both oleic and linoleic acids. The main phospholipid in organs of three lupine species was phosphatidylcholine. In sugar-deficient conditions, content of phosphatidylcholine and some others phospholipids was decreased. The peculiar features of regulation by sugars of storage lipid breakdown in germinating lupine seeds and induction of autophagy in young carbohydrate starved embryo axes is discussed.

9

Diverse regulation by sucrose of enzymes involved in storage lipid breakdown in germinating lupin seeds

51%

Borek S. , Kubala S. , Kubala S.

Acta Physiologiae Plantarum

|

2013

|

tom 35

|

nr 07

EN

The regulatory function of sucrose in the activity of lipid-degrading enzymes was investigated in germinating seeds of yellow lupin (Lupinus luteus L.), white lupin (Lupinus albus L.) and Andean lupin (Lupinus mutabilis Sweet). The study was conducted on isolated embryo axes, excised cotyledons and seedlings cultured in vitro for 96 h on medium with 60 mM sucrose or without the sugar. The activity of lipase (lipolysis), acyl- CoA oxidase and catalase (fatty acid β-oxidation) was enhanced in all studied organs cultured on medium without sucrose. The activity of cytosolic aconitase (glyoxylate cycle) was stimulated by sucrose in seedling axes and isolated embryo axes, whereas in seedling cotyledons and excised cotyledons, it was inhibited. The regulatory function of sucrose in phosphoenolpyruvate carboxykinase (gluconeogenesis) was observed only in isolated embryo axes and the activity was lower in carbohydrate deficiency conditions. The peculiar features of storage lipid breakdown in germinating lupin seeds and its regulation by sucrose are discussed.

10

Comparative study of storage compound breakdown in germinating seeds of three lupine species

51%

Borek S. , Kubala S. , Kubala S. , Ratajczak L.

|

nr 5

EN

Storage lipid and protein breakdown in germinating seeds of yellow (Lupinus luteus L.), white (L. albus L.), and Andean lupine (L. mutabilis Sweet) and regulatory function of sucrose were investigated. Less oil bodies were detected in organs of yellow lupine seeds, whereas the highest content of oil bodies was noticed in the Andean lupine seeds. Mature, air-dried yellow, white and Andean lupine seeds do not contain starch. Starch grains appear the earliest in white lupine seeds during imbibition. Sucrose deficiency in tissues enhances breakdown of storage lipid, protein and temporary starch in cotyledons. In sucrose starved embryo axes of all investigated lupine species, an increased level of vacuolization was noted. Interconnections between catabolism of storage protein and storage lipid in germinating lupine seeds were identified by applying ¹⁴C-acetate. To assess the importance of key processes in storage lipid breakdown NaF (inhibitor of glycolysis and gluconeogenesis), KCN, NaN₃ and SHAM (inhibitors of mitochondrial electron transport chain) and MSO (inhibitor of glutamine synthetase) were used. Radioactivity coming from ¹⁴C-acetate was released as ¹⁴CO₂ but mostly was incorporated into ethanol-soluble fraction of embryo axes and cotyledons. Respiratory inhibitors caused a significant decrease in ¹⁴CO₂ and ethanol fractions in all three lupine species studied. MSO stimulated release of ¹⁴CO₂ and radioactivity of ethanol fractions in yellow lupine organs fed with sucrose, but in Andean lupine MSO enhanced the production of ¹⁴CO₂ and radioactivity of ethanol fractions both in organs fed and not fed with sucrose. Different strategies of storage compound breakdown are proposed, depending on relative proportion in storage protein and lipid content in lupine seeds.

11

Sucrose control of activity of cytosolic aconitase on gene expression level in germinating seeds of yellow lupine (Lupinus luteus L.)

51%

Borek S. , Nuc K. , Doszczeczko M.

|

nr Suppl.1

12

Transgenic plants as a source of polyhydroxyalkanoates

51%

Dobrogojski J. , Spychalski M. , Lucinski R. , Borek S.

Acta Physiologiae Plantarum

|

2018

|

tom 40

|

nr 09

13

Selektywne rodzaje autofagii

51%

Borek S. , Ruta-Piosik M. , Paluch E. , Pietrowska-Borek M.

Postępy Biologii Komórki

|

2015

|

tom 42

|

nr 3

14

Regulation of storage lipid metabolism in developing and germinating lupin (Lupinus spp.) seeds

51%

Borek S. , Ratajczak W. , Ratajczak L.

|

tom 37

|

nr 06

EN

The main storage compound in lupin seeds is protein, whose content can reach up to 45–50 % of dry matter. However, seeds of some lupin species can also contain quite a large amount of storage lipid. The range of lipid content in lupin seeds is from about 6 to about 20 % of dry matter. Storage lipid in developing seeds is synthesized mainly from sugars delivered by mother plants. During seed germination, one of the main end-products of storage lipid breakdown is also sugars. Thus, the sugar level in tissues is considered an important regulatory agent, during both lipid accumulation and lipid breakdown. Generally, in developing legume seeds, there is a strong negative relation between accumulation of storage protein and storage lipid. Results obtained in developing lupin cotyledons cultured in vitro pointed to the possibility of a positive relation between protein and lipid accumulation. Such a positive effect could be caused by nitrate. During lupin seed germination and seedling development, the utilization of storage lipid is enhanced under sugar deficiency conditions in tissues and is controlled at the gene expression level. However, under sugar starvation conditions, autophagy is significantly enhanced, and it can cause disturbances in storage lipid breakdown. The hypothesis of pexophagy, i.e., autophagic degradation of peroxisomes under sugar starvation conditions during lupin seed germination, has been taken into consideration. The flow of lipid-derived carbon skeletons to amino acids was discovered in germinating lupin seeds, and this process is clearly more intense in sucrose-fed embryo axes. At least four alternative or mutually complementary pathways of carbon flow from storage lipid to amino acids in germinating lupin seeds are postulated. The different strategies of storage compound breakdown during lupin seed germination are also discussed.

15

Accumulation of phytoferritin caused by carbohydrate stress in plastids of embroyos of lupin and pea cultivated in vitro

51%

Morkunas I. , Borek S. , Ratajczak W. , Ratajczak L.

Acta Physiologiae Plantarum

|

1999

|

tom 21

|

nr 3 suppl.

16

Zasolenie gleb wytworzonych ze skał kredowych i mioceńskich na terenie uzdrowiska Busko

51%

Swiecicki C. , Kepka M. , Borek S.

|

tom 21

|

nr 1

17

Various asparagine synthesis pathways in germinating seeds and root nodules of yellow lupine

51%

Ratajczak L. , Borek S. , Lehmann T. , Ratajczak W.

|

nr 2 Spec.Vol.

18

Do transcription and protein synthesis inhibitors block regulatory effect of sucrose on activity of selected enzymes involved in storage lipids catabolism in germinating seeds of yellow lupine?

51%

Borek S. , Ratajczak W. , Ratajczak L.

|

nr 2 Spec.Vol.

19

Variability of globulin composition in cultivars and individually tested seeds of yellow lupin [Lupinus luteus L.]

51%

Ratajczak W. , Borek S. , Podgorski A. , Ratajczak L.

Acta Physiologiae Plantarum

|

1999

|

tom 21

|

nr 4

20

The effect of pH of water on lead toxicity in Lemna minor L.

51%

Borek S. , Samardakiewicz S. , Wozny A.

Biological Bulletin of Poznań

|

1998

|

tom 35

|

nr 1