scholarly journals Stimulation of Phospholipid Biosynthesis during Frost Hardening of Winter Wheat

1975 ◽  
Vol 55 (2) ◽  
pp. 356-359 ◽  
Author(s):  
Claude Willemot
Keyword(s):  
Winter Wheat ◽  
Phospholipid Biosynthesis ◽  
Frost Hardening ◽  
Stimulation Of

scholarly journals Stimulation of surfactant phospholipid biosynthesis in the lungs of rats treated with silica

1988 ◽  
Vol 253 (3) ◽  
pp. 659-665 ◽  
Author(s):  
B E Miller ◽  
G E R Hook
Keyword(s):  
Phospholipid Biosynthesis ◽  
Intracellular Pool ◽  
Silica Exposure ◽  
Time Period ◽  
Time Periods ◽  
Silica Treatment ◽  
Surfactant Phospholipids ◽  
Time Point ◽  
Stimulation Of

The effects of intratracheally instilled silica (10 mg/rat) on the biosynthesis of surfactant phospholipids was investigated in the lungs of rats. The sizes of the intracellular and extracellular pools of surfactant phospholipids were measured 7, 14 and 28 days after silica exposure. The ability of lung slices to incorporate [14C]choline and [3H]palmitate into surfactant phosphatidylcholine (PC) and disaturated phosphatidylcholine (DSPC) was also investigated. Both intra- and extra-cellular pools of surfactant phospholipids were increased by silica treatment. The intracellular pool increased linearly over the 28-day time period, ultimately reaching a size 62-fold greater than controls. The extracellular pool also increased, but showed a pattern different from that of the intracellular pool. The extracellular pool increased non-linearly up to 14 days, and then declined. At its maximum, the extracellular pool was increased 16-fold over the control. The ability of lung slices to incorporate phospholipid precursors into surfactant-associated PC and DSPC was elevated at all time periods. The rate of incorporation of [14C]choline into surfactant PC and DSPC was maximal at 14 days and was nearly 3-fold greater than the rate in controls. The rate of incorporation of [3H]palmitate was also maximal at 14 days, approx. 5-fold above controls for PC and 3-fold for DSPC. At this same time point, the microsomal activity of cholinephosphate cytidylyltransferase was increased 4.5-fold above controls, but cytosolic activity was not significantly affected by silica treatment. These data indicate that biosynthesis of surfactant PC is elevated after treatment of lungs with silica and that this increased biosynthesis probably underlies the expansion of the intra- and extra-cellular pools of surfactant phospholipids.

scholarly journals Stimulation of generative development in partly vernalized winter wheat by animal sex hormones

2003 ◽  
Vol 25 (2) ◽  
pp. 217-217
Author(s):  
A. Janeczko ◽  
W. Filek
Keyword(s):  
Winter Wheat ◽  
Sex Hormones ◽  
Stimulation Of

scholarly journals Use of the delayed luminescence test for evaluation of changes in frost-resistance of winter wheat

2013 ◽  
Vol 38 (1) ◽  
pp. 5-10 ◽  
Author(s):  
Aleksander Brzóstowicz ◽  
Zdzisław Prokowski ◽  
Antoni Murkowski ◽  
Edward Grabikowski
Keyword(s):  
Winter Wheat ◽  
Frost Resistance ◽  
Winter Season ◽  
Wheat Cultivars ◽  
Delayed Luminescence ◽  
Luminescence Method ◽  
Frost Hardening ◽  
Conductometric Method ◽  
Winter Wheat Cultivars ◽  
Autumn And Winter

The influence of frost hardening conditions on the frost-resistance of three winter wheat cultivars ('Mironowska 808', 'Grana' and 'Maris Huntsman') was studied. Frost resistance was measured periodically during the autumn and winter season by the delayed luminescence method. Parallelly an electrical conductivity test was performed for comparison. It was found that the temperature which delayed luminescence reaches its maximum (t<sub>N</sub>) correlates with (t<sub>50</sub>) obtained by the conductometric method. The differences in response of particular cultivars to frost and hardening conditions are described.

Stimulation of aphid damage in winter wheat

1986 ◽  
Vol 34 (4) ◽  
pp. 488-493
Author(s):  
H.J.W. van Roermund ◽  
J.R.R. Groot ◽  
W.A.H. Rossing ◽  
R. Rabbinge
Keyword(s):  
Winter Wheat ◽  
Stimulation Of

EFFECT OF DROUGHT ON FROST RESISTANCE AND FATTY ACID CONTENT OF YOUNG WINTER WHEAT PLANTS

1979 ◽  
Vol 59 (3) ◽  
pp. 639-643 ◽  
Author(s):  
C. WILLEMOT ◽  
L. PELLETIER
Keyword(s):  
Drought Stress ◽  
Winter Wheat ◽  
Frost Resistance ◽  
Fatty Acid Content ◽  
Triticum Aestivum L ◽  
Temperature Treatment ◽  
Frost Hardening ◽  
Low Temperature Treatment ◽  
Degree Of Unsaturation ◽  
Water Holding

Low soil moisture, both prior to and during freezing, increased frost resistance of 12-day-old winter wheat (Triticum aestivum L.) plants. While frost resistance increased, percentage of linolenic acid decreased in drought-stressed plants (10% of soil water-holding capacity) as compared with controls (40%). This occurred whether drought stress was applied before freezing at 1 °C or at 20 °C. A degree of frost hardening can be achieved in winter wheat by drought stress without low temperature treatment, and without an increase in degree of unsaturation of fatty acids.

Stimulation of generative development in partly vernalized winter wheat by animal sex hormones

2002 ◽  
Vol 24 (3) ◽  
pp. 291-295 ◽  
Author(s):  
Anna Janeczko ◽  
Władysław Filek
Keyword(s):  
Winter Wheat ◽  
Sex Hormones ◽  
Stimulation Of

Changes in fatty acid composition of winter wheat during frost hardening

Cryobiology ◽  
1977 ◽  
Vol 14 (1) ◽  
pp. 87-93 ◽  
Author(s):  
C. Willemot ◽  
H.J. Hope ◽  
R.J. Williams ◽  
R. Michaud
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Winter Wheat ◽  
Acid Composition ◽  
Frost Hardening

Changes in fatty acids, lipid phosphorus and protein content during frost hardening of winter wheat

Cryobiology ◽  
1975 ◽  
Vol 12 (6) ◽  
pp. 566-567
Author(s):  
C. Willemot ◽  
H.J. Hope ◽  
R.J. Williams
Keyword(s):  
Fatty Acids ◽  
Winter Wheat ◽  
Protein Content ◽  
Lipid Phosphorus ◽  
Frost Hardening

Stimulation of gibberellin activity in winter wheat by metribuzin

1986 ◽  
Vol 28 (5) ◽  
pp. 396-398
Author(s):  
Daniela Zemlová
Keyword(s):  
Winter Wheat ◽  
Gibberellin Activity ◽  
Stimulation Of
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